Meyer Sound Documentation

All components in an audio system (self-powered loudspeakers, mixing consoles, and processors) must be properly connected to an AC power distribution system, ensuring that AC line polarity is preserved and that all grounding points are connected to a single node or common point using the same cable gauge (or larger) as the neutral and line cables.

120 V AC, 3-Phase Wye System (Single Line) Line-Neutral-Earth/Ground

The figure below illustrates a basic 120 V AC, 3-phase Wye distribution system with the loudspeaker load distributed across all three phases, with each loudspeaker connected to a single line and common neutral and earth/ground lines. This system delivers 120 V AC to each loudspeaker

120 V AC, 3-Phase Wye System (Single Line to Loudspeakers)

120 V AC, 3-Phase Wye System (Two Lines) Line-Line-Earth/Ground

The figure below illustrates a 120 V AC, 3-phase Wye distribution system with each loudspeaker connected to two lines and a common earth/ground line. This configuration is possible because LINA tolerates elevated voltages from the ground line and does not require a neutral line. This system delivers 208 V AC to each loudspeaker.

120 V AC, 3-Phase Wye System (Two Lines to Loudspeakers)

Tip

The 120 V AC, 3-phase Wye system with two lines is recommended because it allows loudspeakers to draw less current than with single-line systems, thereby reducing voltage drop due to cable resistance. It also excludes the potential of varying ground to neutral voltages producing an audible hum.

230 V AC, 3-Phase Wye System (Single Line) Line-Neutral-Earth/Ground

The figure below illustrates a basic 230 V AC, 3-phase Wye distribution system with the loudspeaker load distributed across all three phases, with each loudspeaker connected to a single line and common neutral and earth/ground lines. This system delivers 230 V AC to each loudspeaker.

230 V AC, 3-Phase Wye System (Single Line to Loudspeakers)

Caution

For 230 V AC, 3-phase Wye systems, never connect two lines to the AC input of Amie, as the resulting voltage would exceed the upper voltage limit (275 V AC) and will damage the loudspeaker.

The LINA user panel includes two powerCON 20 connectors, as shown in the figure below, one for AC Input (blue) and one for AC Loop Output (gray).

AC Input (Left) and AC Loop Output (Right) Connectors

AC Input (Blue)

The blue AC Input connector supplies power to LINA. The 3-conductor powerCON 20 is rated at 20 A and uses a locking connector that prevents accidental disconnections. A 10-foot AC power cable, rated at 15 A, is included with each loudspeaker. If you replace the included AC power cable, make sure to use a cable with the appropriate power plug (on the other end) for the area in which you will operate the loudspeaker. LINA requires a grounded outlet. To operate safely and effectively, it is extremely important that the entire system be properly grounded.

The AC Input connector also supplies power to any additional loudspeakers connected to the loudspeaker’s gray Loop Output connector.

Caution

When looping AC power for loudspeakers, do not exceed the current capability of the AC Input connector (20 A) or the included AC power cable (15 A). Consider the total current draw for all loudspeakers on the circuit, including the first loudspeaker. See AC Loop Output (Gray) for more information.

AC Loop Output (Gray)

The gray AC Loop Output connector allows multiple LINAs to be looped and powered from a single power source. The 3-conductor powerCON 20 is rated at 20 A and uses a locking connector that prevents accidental disconnections. For applications that require multiple LINAs, connect the AC Loop Output of the first loudspeaker to the AC Input of the second loudspeaker, and so forth.

The maximum number of loudspeakers that can be looped from the AC Loop Output connector is determined by the voltage of the power source, the current draw of the looped loudspeakers, the circuit breaker rating, and the rating of the AC power cable connected to the first LINA loudspeaker, as shown in the table below.

Table 1. Maximum LINAs that Can Be Looped with AC Power

Circuit Breaker/ Connector Rating	115 V AC	230 V AC	100 V AC
15 A / 16 A	5 looped (6 total)	11 looped (12 total)	4 looped (5 total)
20 A	7 looped (8 total)	16 looped (17 total)	6 looped (7 total)

Note

Current draw for LINA is dynamic and fluctuates as operating levels change. The indicated number of loudspeakers that can be looped assumes that operating levels are normal and not such that loudspeakers are constantly limiting.

LINA ships with a gray powerCON 20 cable mount connector, rated at 20 A, for assembling AC looping cables. Assembled AC looping cables are also available from Meyer Sound.

Caution

When looping AC power for loudspeakers, do not exceed the current capability of the AC Input connector (20 A) or the included AC power cable (15 A). Consider the total current draw for all loudspeakers on the circuit, including the first loudspeaker, as shown in the table above.

LINA ships with a gray powerCON 20 cable mount connector, rated at 20 A, for assembling AC looping cables, shown in the figure below. The pins on the powerCON 20 cable mount connector are labeled as follows:

powerCON 20 Cable Mount Connector

How AC power cables are wired is determined by the type of AC power distribution system used (see AC Power Distribution). When wiring AC power cables for single-line systems, use one of the wiring schemes described in the table below and illustrated in the figure above:

AC Wiring Scheme, illustrated

LINA operates as intended when receiving AC voltage within the following range:

If the voltage drops below 90 V, the loudspeaker uses stored power to continue operating temporarily; the loudspeaker powers off if the voltage does not return to its operating range.

If the voltage rises above 275 V, the power supply could become damaged.

Current draw for loudspeakers is dynamic and fluctuates as operating levels change. Because different cables and circuit breakers heat up at varying rates, it is important to understand the following types of current ratings and how they affect circuit breaker and cable specifications.

Use the information provided in the table below as a guide for selecting the gauge of cables and the circuit breaker ratings for the system’s operating voltage.

The minimum electrical service amperage required by a loudspeaker system is the sum of the maximum long-term continuous current for all loudspeakers. An additional 30 percent above the combined Maximum Long-Term Continuous amperages is recommended to prevent peak voltage drops at the service entry.

LINA’s Intelligent AC™ power supply automatically selects the correct operating voltage (allowing the loudspeaker to be used internationally without manually setting voltage switches), eliminates high inrush currents with soft-start power up, suppresses high-voltage transients up to several kilovolts, filters common mode and differential mode radio frequencies (EMI), and sustains operation temporarily during low-voltage periods

When powering on LINA, the following startup events take place over several seconds.

Make sure to observe the following important electrical and safety guidelines.

LINA is available with XLR 5-pin or 3-pin connectors for audio Input and audio Loop output, as shown in the figures below. XLR 5-pin connectors accommodate both balanced audio and RMS signals.

XLR 5-Pin Audio Connectors, Input and Loop Output

XLR 3-Pin Audio Connectors, Input and Loop Output

Audio Input (XLR 3-Pin or 5-Pin Female)

The XLR 3-pin or 5-pin female Input connector accepts balanced audio signals with an input impedance of 10 kΩ. The connector uses the following wiring scheme:

• Pin 1 — 1 kΩ to chassis and earth ground (ESD clamped)

• Pin 2 — Signal (+)

• Pin 3 — Signal (–)

• Pin 4 — RMS (polarity insensitive)

• Pin 5 — RMS (polarity insensitive)

• Case — Earth (AC) ground and chassis

Note

Pins 4 and 5 (RMS) are included only with XLR 5-pin connectors.

Pins 2 and 3 carry the input as a differential signal. Pin 1 is connected to earth through a 1 kΩ, 1000 pF, 15 V clamped network. This circuitry provides virtual ground lift for audio frequencies while allowing unwanted signals to bleed to ground. Make sure to use balanced XLR audio cables with pins 1–3 connected on both ends. Telescopic grounding is not recommended and shorting an input connector pin to the case may cause a ground loop, resulting in hum.

Tip

If the loudspeaker produces unwanted noise or hiss, disconnect its input cable. If the noise stops, there is most likely nothing wrong with the loudspeaker. To locate the source of the noise, check the source audio, AC power, and electrical ground.

Audio Loop Output (XLR 3-Pin or 5-Pin Male)

The XLR 3-pin or 5-pin male Loop output connector allows multiple loudspeakers to be looped from a single audio source. The Loop output connector uses the same wiring scheme as the Input connector (see Audio Input (XLR 3-Pin or 5-Pin Female)). For applications that require multiple LINAs, connect the Loop output of the first loudspeaker to the Input of the second loudspeaker, and so forth.

Note

The Loop output connector is wired in parallel to the Input connector and transmits the unbuffered source signal even when the loudspeaker is powered off.

Calculating Load Impedance for Looped Audio Signals

To avoid distortion when looping multiple loudspeakers, make sure the source device can drive the total load impedance of the looped loudspeakers. In addition, the source device must be capable of delivering approximately 20 dBV (10 V rms into 600 Ω) to yield the maximum SPL over the operating bandwidth of the loudspeakers.

To calculate the load impedance for the looped loudspeakers, divide 10 kΩ (the input impedance for a single loudspeaker) by the number of looped loudspeakers. For example, the load impedance for 10 LINAs is 1000 Ω (10 kΩ/ 10). To drive this number of looped loudspeakers, the source device should have an output impedance of 100 Ω or less. This same rule applies when looping LINAs with other Meyer Sound selfpowered loudspeakers.

Note

Most source devices are capable of driving loads no less than 10 times their output impedance.

Tip

Audio outputs from Meyer Sound’s loudspeaker GALAXY Network Platform have an output impedance of 50 ohms. Each output can drive up to 20 Meyer Sound (10 kΩ) loudspeakers without distortion

Caution

Make sure that all cabling for looped loudspeakers is wired correctly (Pin 1 to Pin 1, Pin 2 to Pin 2, and so forth) to prevent the polarity from being reversed. If one or more loudspeakers in a system have reversed polarity, frequency response and coverage will be significantly degraded.

LINA employs Meyer Sound’s advanced TruPower® limiting. Conventional limiters assume a constant driver impedance and set the limiting threshold by measuring voltage alone. This method is inaccurate because driver impedances change as frequency content in the source material changes and as thermal values for the loudspeaker’s voice coil and magnet vary. Consequently, conventional limiters often begin limiting prematurely, which reduces system headroom and dynamic range.

In contrast, TruPower limiting anticipates varying driver impedances by measuring both current and voltage to compute the actual power dissipation in the voice coil. This approach improves performance, both before and during limiting, by allowing the driver to produce the maximum SPL across its entire frequency range, while also retaining signal peaks. TruPower limiting also eliminates power compression at high levels over lengthy periods, which helps regulate voice coil temperatures, thereby extending the life of the driver.

HF and LF Limit LEDs

The low- and high-frequency drivers for LINA are powered by separate amplifier channels, which have limiters. Limiting activity is indicated with two Limit LEDs on the user panel. The Limit LEDs, shown in the figure below, indicate limiting for the high-frequency channel and/or the low-frequency channels.

LINA Limit LEDs

When engaged, the limiters not only protect the drivers but also prevent signal peaks from causing excessive distortion in the amplifier channels, thereby preserving headroom and maintaining smooth frequency response at high levels. When levels return to normal, below the limiter thresholds, limiting ceases.

LINA performs within its acoustical specifications at normal temperatures when the Limit LEDs are unlit, or when the LEDs are lit for 2 seconds or less and then turn off for at least 1 second. If the LEDs remain lit for longer than 3 seconds, the loudspeaker enters hard limiting where:

• Increases to the input level have no effect

• Distortion increases due to clipping

• Drivers are subjected to excessive heat and excursion, thereby compromising their lifespan

Caution

The Limit LEDs indicate when a safe, optimum level is exceeded. If a LINA loudspeaker system begins to limit before reaching the desired SPL, consider adding more units to the system.

LINA is convection cooled. The amplifier’s heat sink provides natural convection cooling from the air flowing near its fins.

During normal operation, when LINA is powered on, the Active/Status LED is solid green. If the loudspeaker encounters a hardware fault, or the unit begins to overheat, the LED flashes red. In some instances, the loudspeaker will continue to output audio while the LED flashes red, though with a reduction in the limiter threshold and acoustic output to protect the loudspeaker.

If a loudspeaker is overheating (for RMS-equipped loudspeakers, you can verify this in Compass RMS), a reduction in SPL may be necessary. If, after a reduction in SPL and an approximate cooling period, the Active/Status LED continues to flash red (does not return to solid green), contact Meyer Sound Technical Support.

If the Active/Status LED flashes red and the loudspeaker does not output audio, contact Meyer Sound Technical Support immediately.

When installing Meyer Sound loudspeakers and subwoofers, the following precautions should always be observed:

The table below summarizes the available rigging options for LINA. For complete information on rigging hardware, including dimensions, weight, configuration, and load ratings, refer to the MG-MINA/LINA/750 Assembly Guide (PN 05.207.101.02).

Each LINA loudspeaker is equipped with four captive GuideALinks that link to adjacent units in flown and groundstacked arrays. Located at the bottom corners of the end frames, the GuideALinks extend and retract with knobs and are secured with quick-release pins, as shown in the figure below.

LINA GuideALinks with Quick-Release Pins

Front GuideAlinks

The front GuideALinks, shown in the figure below, act as a pivot point between linked LINAs, with the splay angle between the units determined by the rear GuideALink positions. When stowing front GuideALinks, the knob is positioned at the top of the slot.

Front GuideALinks

Rear GuideALinks

The rear GuideALinks, shown in the first figure below, permit splay angles between linked LINAs at 0.0°, 0.5°, and 1–11° (1° increments). The rear GuideALink includes three rows of holes corresponding to the available splay angles that are secured in one of three pinning positions at the bottom of the unit, as shown in the third figure below.

The label in the lower left corner of the end frame, shown in the second figure below, shows the splay angle for the GuideALink position. With the knob at the bottom, the splay angle is 0°. As the knob is moved up, the angle increases up to 11° (Figure 21). To stow the link, the knob is moved all the way to the top of the slot.

Rear GuideALinks

Rear GuideALink Label and Pinning Positions

Rear GuideALink, Splay Angles for Linked LINAs

Note

• The splay angles listed on the GuideALink label are for relative angles between the linked units. For example, setting the GuideALink to “5” yields a 5° downtilt of the lower unit relative to the upper unit. How the loudspeakers relate to the floor, stage, and seating angles in the venue depends on the orientation of the MG-MINA/LINA/750-LFC grid, the angles of the loudspeakers in the array above them, whether they are flown or ground-stacked, and other factors. Use MAPP system design software to determine the optimum splay angles for loudspeakers and coverage pattern of the array.

• To achieve optimal acoustical performance for LINA arrays, use the appropriate number of units and splay angles to meet the coverage requirements of the venue. Utilize MAPP to verify designs and rigging configurations.

The MG-MINA/LINA/750-LFC grid, shown in the figure below, flies LINA arrays of up to 16 cabinets at a 5:1 safety ratio. The grid, which can also be used for groundstacking arrays, accommodates a variety of pickup configurations with four side pickup points and 11 center pickup points.

MG-MINA/LINA/750-LFC Grid

The MG-MINA/LINA/750-LFC grid has four captive links, two per side, that attach to the top LINA in flown arrays. The configuration of the links and orientation of the grid (for either maximum uptilt or maximum downtilt) determine the angle of the attached LINA. The grid links are easily stowed for transport and groundstacked configurations.

The MG-MINA/LINA/750-LFC grid includes eight (0.25 in x 0.90 in) quick-release pins: four for securing the four grid links, and four for securing LINA groundstacks to the top of the grid.

MG-MINA/LINA/750-LFC Grid Orientations for Flown Configurations

The orientation of the MG-MINA/LINA/750-LFC grid determines the maximum downtilt and maximum uptilt for flown arrays.

MG-MINA/LINA/750 Oriented for Maximum Array Downtilt

When the MG-MINA/LINA/750-LFC grid is oriented with the links toward the front of the flown loudspeakers, the grid provides maximum downtilt for the flown array (when tilting the grid). The label on the MG-MINA/LINA/750-LFC shows this configuration as “Maximum Downtilt.”

With the maximum downtilt orientation, the LINA at the top of the array can be attached to the grid at 0° and –5° downtilt, as shown in the figure below.

MG-MINA/LINA/750-LFC Grid, Maximum Downtilt Orientation, 0° and –5°

Tip

The tilt for the MG-MINA/LINA/750 and the array hung below it can be further tilted by using chain motors, or differing lengths of steel or SpanSets.

MG-MINA/LINA/750-LFC Oriented for Maximum Array Uptilt

When the MG-MINA/LINA/750-LFC grid is oriented with the links toward the rear of the flown loudspeakers, the grid provides maximum uptilt for the flown array (when tilting the grid). The label on the MG-MINA/LINA/750-LFC shows this configuration as “Maximum Uptilt.”

With the maximum uptilt orientation, the LINA at the top of the array can be attached to the grid at –5 and –10° downtilt, as shown in the figure below.

MG-MINA/LINA/750-LFC Grid, Maximum Uptilt Orientation, –5° and -10°

Tip

• The tilt for the MG-MINA/LINA/750-LFC and the array hung below it can be further tilted by using chain motors, or differing lengths of steel or SpanSets.

• :Use the MAPP System Design Tool’s prediction software to help determine the grid orientation that most appropriately balances the rigging load for a given application. It provides information such as the array COG (center of gravity) marker and front and rear rigging load weights.

MAPP System Design Tool Prediction Examples

Meyer Sound recommends using the MAPP System Design Tool to determine appropriate grid orientations. For example, the first figure below illustrates the MAPP software display when checking the COG (purple line extending upward) for maximum array uptilt, and the second figure below shows maximum downtilt.

The COG line is also useful when suspending the grid from a single center pickup point. Determine the appropriate point to use by observing which one of the 11 pickup points the COG line intersects.

MAPP COG Maximum Downtilt

MAPP COG Maximum Downtilt

The MAPP software also provides weight distribution information. Use the grid orientation that has the least difference between the Front and Rear Rigging Loads calculated in the Flown Loudspeaker System Properties window, shown in the figure below.

Balanced Rear and Front Rigging Loads.

Groundstacking LINAs with the MG-MINA/LINA/750-LFC

The MG-MINA/LINA/750-LFC grid can also be used for groundstacking up to six LINAs. When used for groundstacking, the grid should be oriented so the center of gravity for the stacked loudspeakers is near the center of the grid. The LINA at the bottom of the stack attaches directly to the grid with its GuideALinks and is secured with the quick-release pins included with the grid, as shown in the figure below. The configuration of the GuideALinks, shown in the second figure below, for the attached LINA determines its tilt, which can be from +6° (uptilt) to –5° (downtilt).

MG-MINA/LINA/750-LFC Grid with Groundstacked LINA

Rear GuideALink, Angles for Groundstacked Units

Caution

To secure groundstacked arrays, particularly in outdoor situations, use tie downs or weights with the grid and/or a safety system on the array.

The MYA-MINA/LINA mounting yoke flies up to three LINA loudspeakers from a single hanging point using a C-clamp or equivalent, as shown in the figure below, or pole-mounts up to two LINA loudspeakers with a third-party pole-mount adapter (see “Pole-Mounting LINAs with the MYA-MINA/LINA” on page 30). For flown applications, the yoke supports up to 30° of uptilt and severe downtilts of up to 90°. For flying larger arrays, the MG-MINA/LINA/750-LFC grid is recommended; for smaller profile applications, the MUB-MINA/LINA U-bracket is recommended.

MYA-MINA/LINA with MPA-3 Adapter, Three LINAs, and third-party clamp

MYA-MINA/LINA Bracket Options

The yoke includes two bracketing options: the MPA-2 for attaching to two cabinets, and the MPA-3 for attaching to one or three cabinets. The bracket options allow the yoke to attach near the center of gravity for the loudspeakers. The brackets bolt directly to the LINA end frames with the M6 bolts and washers included with the yoke kit. For attaching to the yoke, the brackets include a center/pivot hole and three pinning holes to yield a wide range of uptilt and downtilt angles for the loudspeakers.

MPA-2 Bracket

When suspending two LINA cabinets with the MYA-MINA/LINA mounting yoke, use the MPA-2 bracket and attach it to the bottom cabinet, as shown in the figure below.

MPA-2 bracket

MPA-3 Bracket

When suspending one or three LINA cabinets with the MYA-MINA/LINA mounting yoke, use the MPA-3 bracket shown in the first figure below. When suspending three cabinets, attach the bracket to the center cabinet, as shown in the second figure below.

MPA-3 bracket

Flown MYA-MINA/LINA with MPA-3 bracket and Three LINAs

Pole-Mounting LINAs with the MYA-MINA/LINA

Up to two LINA loudspeakers can be pole-mounted with the MYA-MINA/LINA mounting yoke. For pole-mounting two LINA loudspeakers, use the MPA-2 bracket, shown in the figure below. For pole-mount applications, the yoke supports up to 30° of downtilt and severe uptilts of up to 90°. When pole-mounting LINAs with the yoke, the optional 35 mm pole stand adapter is required (PN 40.010.971.01).

Pole-Mounted MYA-MINA/LINA with MPA-2 bracket and Two LINA loudspeakers with optional 35 mm pole stand adapter

Caution

When mounting the MYA-MINA/LINA on a pole, make sure the pole and pole-mount adapter have been rated to support the full weight of the yoke and loudspeakers. Observe all safety precautions specified by the pole and pole-mount adapter manufacturer.

The MUB-MINA/LINA U-bracket was primarily designed for aiming a single LINA loudspeaker in floor- and ceiling-mount configurations (F[→ _bookmark60]igure 35). However, the U-bracket is strong enough to fly arrays of up to five cabinets, or stack up to two cabinets in floor- and pole-mount configurations. With the

U-bracket, up to two LINA loudspeakers can also be flown from trusses using C-clamps or the equivalent. For flying and groundstacking larger arrays, the MG-MINA/LINA/750-LFC grid is recommended; for applications requiring continuous adjustability or greater downtilt and uptilt angles, the MYA-MINA/LINA mounting yoke is recommended.

Ceiling-Mounted MUB-MINA/LINA with One LINA

The MUB-MINA/LINA U-bracket’s mounting holes and mounting slot provide maximum flexibility for the loudspeaker’s uptilt and downtilt. For flown applications, the MUB-MINA/LINA can be oriented for either maximum downtilt (with the slot near the front of the loudspeakers) or maximum uptilt (with the slot near the rear of the loudspeakers).

Floor- and Pole-Mounting LINAs with the MUB-MINA/LINA

Up to two LINA loudspeakers can be floor or pole-mounted with the MUB-MINA/LINA U-bracket, shown in the figure below. When pole-mounting LINAs with the U-bracket, the optional 35 mm pole stand adapter is required (PN 40.010.971.01). For floor- and pole-mounted applications, the MUB-MINA/LINA can be oriented for either maximum downtilt (with the slot near the rear of the loudspeakers) or maximum uptilt (with the slot near the front of the loudspeakers).

• For a single floor- or pole-mounted cabinet, the

MUB-MINA/LINA supports continuous angles from +10 to –10° in the maximum downtilt orientation, and angles of 0 to +20° in the maximum uptilt orientation.

• For multiple floor- or pole-mounted cabinets, the

MUB-MINA/LINA supports fixed angles of 0, +5, and +10° (with either orientation).

Pole-Mounted MUB-MINA/LINA/750 with Two LINA loudspeakers using the 35 mm pole stand adapter

Caution

When mounting the MUB-MINA/LINA on a pole, make sure the pole and pole stand adapter have been rated to support the full weight of the U-bracket and loudspeakers. Observe all safety precautions specified by the pole and pole-mount adapter manufacturer.

Note

For illustrations showing which MUB-MINA/LINA mounting holes and slot configurations to use to achieve specific angles, refer to the MG-MINA/LINA/750-LFC Assembly Guide (PN 05.207.101.02).

For applications requiring extreme array downtilt that is not possible with adjustments to the motors attached to the grid, the optional PBF-LINA pull-back frame can be attached to the bottom cabinet in LINA arrays and pulled by a separate motor. The pull-back frame is secured to the bottom cabinet with the quick-release pins (0.25 in x 0.53 in, black button, PN 134.039) included with LINA. The PBF-LINA pull-back frame requires 1/2-inch shackles for its two pickup points.

PBF-LINA Pull-Back Frame Attached to Bottom LINA, Exploded View

The optional MVP motor Vee plate fine-tunes the horizontal aim of LINA and 750-LFC arrays ±16 degrees. The bottom of the Vee plate attaches to the MG-MINA/LINA/750-LFC grid’s front-most or rear-most point on the center pickup bar, while the top corners of the Vee plate attach to two motors, which, when adjusted, affect the horizontal rotation of the grid. The Vee plate’s attachment points require 3/4- inch or 7/8-inch shackles. The Vee plate should always be placed on the grid side (front or rear) with the lower load value.

MVP Motor Vee Plate Attached to MG-MINA/LINA/750-LFC Grid

The MCF-MINA/LINA caster frame, shown in the first figure below, safely supports up to five LINAs, as shown in the second figure below, for transport and groundstacking, making it easy to assemble or disassemble arrays. The caster frame’s sturdy construction allows it be conveniently moved with forklifts.

MCF-MINA/LINA Caster Frame

The LINA at the bottom of the stack attaches securely to the caster frame with its GuideALinks and is secured with the four (1/4 by 0.90-inch) quick-release pins included with the caster frame. The configuration of the GuideALinks for the attached LINA determines its tilt, which can be from +6° (uptilt) to –5° (downtilt).

MCF-MINA/LINA Caster Frame with LINA Stack

Safety Guidelines for the MCF-MINA/LINA Caster Frame

• Do not stack more than five LINAs.

• Avoid moving stacks in the front-to-back direction of the LINAs (the long side); always move stacks sideways to avoid tipping, as shown in the figure below.

Avoid Moving Stacks in Front-to-Back Direction

• When transporting a non-curved LINA stack with 0° splay angles, configure the rear GuideALinks for the bottom LINA so it is attached to the caster frame at 0° (using the 5° hole in the LINA GuideALinks).

• When transporting a curved LINA stack with wide splay angles, configure the rear GuideALinks for the bottom LINA so it is attached to the caster frame at –5° (using the 0° hole in the LINA GuideALinks), to compensate for the stack’s center of gravity.

• When groundstacking LINAs with the caster frame, make sure that all four caster wheels are blocked to prevent the stack from rolling away.

Compass RMS™ software provides extensive system status and performance data for each loudspeaker, including amplifier voltage, limiting activity, power output, fan and driver status, as well as mute and solo capability. Loudspeakers are added to the RMS network and assigned a node name during a one-time discovery procedure. Once loudspeakers are identified on the RMS network, they appear in Compass RMS as icons that can be customized to suit your needs, as shown in the figure below.

Compass RMS Window

Individual loudspeakers can be physically identified with the Wink option in RMS, which lights the Wink LED on the RMS module of that particular loudspeaker. Conversely, a loudspeaker can be identified in Compass RMS by pressing the Identify button on the loudspeaker’s RMS module.

Loudspeaker icons can be arranged in Compass RMS and saved as pages to represent how the loudspeakers have been deployed in the system. Multiple pages can be saved and recalled for specific performances and venues.

The AcheronDesigner RMS user panel, shown below, includes an Identify button, Remote Mute switch, Wink/Activity LED, and two Network connectors.

Acheron Designer RMS Module

Identify Button

The Identify button serves the following functions:

• If the loudspeaker has not yet been discovered on the RMS network (Wink/Activity LED not lit), press the Identify button to discover it.

• To remove the loudspeaker from the RMS network, press and hold the Identify button during startup (see Resetting the RMS Module).

• To wink a discovered loudspeaker, press the Identify button. The Wink LED on the loudspeaker icon in Compass RMS lights up and the Wink/Activity LED on the loudspeaker’s RMS user panel turns solid green. Press the Identify button again to unwink the loudspeaker.

Tip

The loudspeaker can also be winked by clicking the Wink button on the loudspeaker icon in Compass RMS.

Wink/Activity LED (Green)

The green Wink/Activity LED indicates the status of the loudspeaker:

• During startup, the LED flashes green 10 times.

• If the loudspeaker has not yet been discovered on the RMS network, the LED is not lit after startup.

• • If the loudspeaker has been successfully discovered on the RMS network, the LED flashes green continuously and flashes more rapidly with increased data activity.

• When the loudspeaker is winked, either by clicking the Wink button in Compass RMS or by pressing the Identify button on the RMS user panel, the LED is solid green. The LED remains solid green until the loudspeaker is unwinked.

Tip

The Wink function is useful for identifying the physical loudspeaker corresponding to a loudspeaker icon in Compass RMS.

Remote Mute Switch

The recessed Remote Mute switch on the RMS module, shown in the figure below, determines whether Compass RMS can control muting and soloing of the loudspeaker. The loudspeaker ships from the factory with the switch enabled.

Remote Mute Switch

• Disable: When the Remote Mute switch is set to Disable (to the left), the loudspeaker cannot be muted or soloed from Compass RMS.

• Enable: When the Remote Mute switch is set to Enable (to the right), the loudspeaker can be muted and soloed from Compass RMS.

Note

Compass RMS has a preference that can be set to disable Mute and Solo functions, eliminating any possibility of accidentally muting loudspeakers.

RMS Network Connectors

The Weidmuller 2-conductor, locking connectors transfer data to and from the RMS network. Two connectors are provided to allow for easy connection of multiple (daisy-chained) loudspeakers on the network. Included with each RMS-equipped loudspeaker are RMS cable connectors and mounting blocks for constructing RMS cables. The mounting blocks allow the Weidmuller connectors to be securely attached to the RMS module with screws.

Each RMS module has a unique 12-character Neuron ID (NID) that identifies the loudspeaker on the network. The NID is automatically detected by RMServer but can also be entered manually, if necessary when configuring RMS systems in Compass RMS without loudspeakers present. The NID label is located on the RMS user panel near the orange Network connectors.

You can use the Identify button to reset the RMS module when powering on the loudspeaker. This action will cause the module to be removed from the RMS network.

MAPP is a powerful, cross-platform application for accurately predicting the coverage pattern, frequency response, phase response, impulse response, and SPL capability of single or arrayed Meyer Sound loudspeakers.

MAPP System Design Tool

Whether planning for fixed installations or for tours with multiple venues, you can use MAPP to accurately predict the appropriate loudspeaker deployment for each job, complete with coverage data, system delay and equalization settings, rigging information, and detailed design illustrations. MAPP’s accurate, high-resolution predictions ensure that systems will perform as expected, thereby eliminating unexpected coverage problems and minimizing onsite adjustments.

The key to the accuracy of MAPP’s predictions is Meyer Sound’s exhaustive database of loudspeaker measurements. Performance predictions for each loudspeaker are based on 720 1/48th-octave-band measurements taken with a SIM audio analyzer in the Meyer Sound anechoic chamber. The extraordinary consistency between Meyer Sound loudspeakers guarantees that predictions from MAPP will closely match their actual performance.

MAPP client software lets you configure Meyer Sound loudspeaker systems and define the environment in which they operate, including air temperature, pressure, humidity, and even the location and composition of surfaces. You can also import CAD (.DXF) files containing detailed venue information to act as a visual aid.

MAPP prediction requests are sent by the client software to Meyer Sound servers, where complex, high-resolution (magnitude and phase) polar data is processed with sophisticated acoustical prediction algorithms. The resulting predictions are then displayed in the MAPP client software.

With MAPP, you can:

With MAPP, you can:

The SIM audio analyzer is a high-resolution audio measurement system comprising software, hardware, microphones, and accessory cables. SIM presents measured audio frequencies at a resolution of 48 points per octave, where the 48 points per octave are arranged in even frequency increments in each octave group, equal to the total frequencies in that octave divided by 48. This resolution allows application of precise corrections to balance system response using frequency and phase domain information.

Source Independent Measurement Technique

The SIM 3 audio analyzer implements Meyer Sound's source independent measurement technique, a dual-channel method that accommodates statistically unpredictable excitation signals. Any excitation signal within a desired frequency range can be used to obtain highly accurate measurements for acoustical or electronic systems.

For example, during a performance, both the input signal and the measured output of the loudspeaker system can be captured and used as a SIM test signal, so you can:

• View measurement data as amplitude versus time (impulse response) or amplitude and phase versus frequency (frequency response)

• Utilize a single-channel spectrum mode

• View frequency domain data with a logarithmic frequency axis

• Determine and internally compensate for propagation delays using the SIM 3 Delay Finder

SIM Applications

SIM's main applications are testing and aligning loudspeaker systems, which entails:

• Measuring propagation delays between subsystems to determine appropriate polarities and delay time

• Verifying correct polarity

• Measuring variations in frequency response caused by the acoustical environment and the placement and interaction of the loudspeakers to determine corrective equalization

• Optimizing subwoofer integration

• Optimizing loudspeaker arrays

The SIM audio analyzer can also be used in the following applications:

• Microphone calibration and equalization

• Transducer evaluation and correction

• Echo detection and analysis

• Vibration analysis

• Architectural acoustics

Weather Protection is strongly recommended for all permanent outdoor installations where loudspeakers are directly exposed to the elements. This includes desert and semi-arid climates, where protection against dust and sand is important, and where infrequent rainstorms can contribute to deterioration of loudspeaker components.

Weather Protection is also recommended when the loudspeakers are sheltered from direct exposure to precipitation but are nevertheless exposed to prolonged high humidity, fog or mist. Examples would be installations on covered outdoor terraces or pavilions

Weather Protection is further advisable for portable or touring systems when any significant outdoor use is anticipated. Even though standard procedures may call for using external protective measures, these are often not implemented in time to prevent moisture intrusions that could lead to premature performance degradation of the loudspeaker.

The wear and tear on a loudspeaker will vary significantly with different climatic conditions. For example, a weather-protected loudspeaker installed in a sunlight-exposed location on an ocean pier will experience much harsher conditions than a loudspeaker in a similar installation that is shaded by trees and exposed only to rainfall. The constant exposure to direct UV radiation and salt air environment will cause a loudspeaker to wear more quickly than one with partial UV shielding and exposed only to freshwater moisture.

Wear can eventually affect the performance of the loudspeaker. It also affects aesthetics. For example, in salt air environments, the exterior grille can quickly show signs of oxidation, causing unsightly discoloration.

Apart from selecting suitable weather protection, the progress of wear and tear on the loudspeaker can be slowed by a regular schedule of inspection and cleaning. This maintenance is particularly necessary in harsh environments. Inspection and cleaning should include routine removal of any visible oxidation or environmental particulates, as these can accelerate metal corrosion or decay of the cabinet. If installed loudspeakers are not in use for an extended period, exterior protection or temporary removal and storage of the loudspeakers should be considered.

There are several benefits to selecting the Meyer Sound Weather Protection option:

Ultra Weather (UW) Protection is recommended for applications where loudspeakers will experience exposure to a salt air environment or chemicals, that have no sheltering from corrosive spray or UV exposure, and that cannot be covered or removed during their service life. Examples would include cruise ship exterior areas, ocean-side visitor attractions, swimming pool areas, and themed attractions with wind-carried water spray.

For installations in extremely harsh environments, Meyer Sound offers an IPX5-rated, Ultra Weather Protection version of the 900-LFC loudspeaker, which includes all of the components of standard Weather Protection, plus the following:

Table 6 provides a list of the optional accessories and user-accessible hardware component differences for 900-LFC loudspeakers that ship from the factory as Ultra Weather Protection versions.

Blanking Screws (6 per side) to Prevent Corrosion at Unused Pin Locations for Ultra Weather Protection Grid

Ultra Weather Protection 900-LFC Loudspeaker Version has Clamps, Screws, and Lock pins that replace standard version quick-release pins

Meyer Sound assumes normal and accepted installation practices are used when installing Meyer Sound Loudspeakers outdoors. Deviation from such practices may cause weather protection to be ineffective and void the warranty for the loudspeaker.

Examples of unacceptable and acceptable installation practices include:

If in doubt about an installation method, contact Meyer Sound Technical Support for assistance.

Always discuss the environmental conditions of your Meyer Sound installation with your Sales Manager, and verify the availability of Weather Protection for your selected loudspeaker models. The Sales Manager, together with Technical Support, will verify the appropriate level of weather protection for the loudspeakers and related rigging hardware.

IP stands for "Ingress Protection." The current format for expressing an IP rating is a 2-digit code. The first digit of an IP rating represents protection from solid objects. The second digit of an IP rating represents protection from water or moisture. The table below provides a chart of IP ratings and the corresponding definitions of the rating.

The LINA rigid removable rain hood is easily attached and removed with the included four screws, as shown in the figure below.

LINA with rigid rain hood

The LINA collapsible rain hood is installed on the unit when shipped. Four screws secure its frame permanently, as shown in the figure below.

LINA with collapsible rain hood

The Ultra Weather Protection LINA Rain Hood includes the following parts:

Ultra Weather Protection is recommended for applications where loudspeakers will experience exposure to a salt air environment or chemicals, that have no sheltering from corrosive spray or UV exposure, and that cannot be covered or removed during their service life. Examples would include cruise ship exterior areas, ocean-side visitor attractions, swimming pool areas, and themed attractions with wind-carried water spray.

For installations in extremely harsh environments, Meyer Sound offers an Ultra Weather Protection option for the LINA loudspeaker, which includes all of the components of standard Weather Protection, plus the following:

Table 6 provides a list of user-accessible hardware component differences for LINA loudspeakers that are ultra weather protected.

Table 6: LINA Ultra Weather Protection Version Part Differences

The LINA rigid removable rain hood plus UW rain hood shield are easily attached and removed with the included four screws, as shown in the figure below.

LINA with Rain Hood and UW Shield (left) and Inside Rain Hood view of Cable Routing over Inner Wall (right)