Meyer Sound Documentation

The CAL loudspeaker receives AC power from its 3-pole, grounded powerCON 20 locking connector. Located on the unit’s rear panel, the locking connector is rated for up to 20 A. A 10-foot AC power cable, rated at 15 amps, is included with each CAL loudspeaker.

CAL AC Input Connector

If you replace the included AC power cable, make sure to use a cable that is wired correctly and equipped with the appropriate power plug (on the other end) for the area in which you will operate the unit.

CAL loudspeakers require a grounded outlet. To operate safely and effectively, it is extremely important that the entire system be properly grounded.

AC Cable Wiring Scheme

When wiring international or special-purpose AC power cables and connectors, use the following wiring scheme:

CAL operates as intended when the AC voltage stays within the rated voltage range of 100–240 V AC ± 10% at 50–60 Hz.

If the voltage drops below 90 V, CAL uses stored power to continue operating temporarily; the power supply turns off if the voltage does not return to normal levels.

If the voltage rises above 264 V, the CAL power supply immediately turns off to prevent damage to the unit.

If CAL turns off due to either low or high voltage, its power supply automatically turns on again after 3 seconds, so long as the voltage has returned to normal levels. If CAL does not turn back on after 10 seconds, remove AC power immediately and contact Meyer Sound Technical Support.

3-Phase Wye System

When AC power is applied to CAL, its Intelligent AC™ power supply automatically selects the correct operating voltage, allowing it to be used internationally without manually setting voltage switches. In addition, Intelligent AC provides soft-start power on (eliminating high inrush currents), 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 CAL, the following startup events occur over several seconds:

The current draw for CAL 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.

You can use the following table as a guide for selecting cable gauges and circuit breaker ratings for the system’s operating voltage.

The minimum electrical service amperage required by a CAL loudspeaker system is the sum of the Maximum Long-Term Continuous Current for each loudspeaker. An additional

30 percent above the minimum amperage is recommended to prevent peak voltage drops at the service entry.

Pay close attention to these important electrical and safety issues.

CAL includes four numbered audio inputs: three analog and one digital. The three analog inputs also provide loop output for looping multiple loudspeakers from a single audio source. In Compass control software, a single input is specified as the active input, and another input can be specified as an override input (when the installation requires CAL to function as part of a fire alarm or evacuation system).

Analog Inputs (1–3)

Analog Audio Input and Loop Output Connectors

The three analog inputs use Phoenix 6-pin male connectors and accept balanced audio signals with an input impedance of 10 kOhm. The analog audio source is received via the connector’s top three pins (shield, positive, and negative). The signal is looped to the connector’s bottom three pins (also shield, positive, and negative) for output when looping multiple loudspeakers from a single audio source. The pins for the analog connectors are clearly labeled on the CAL user panel.

The positive (+) and negative (–) pins carry the input as a differential signal. The shield (S) pin is connected to earth through a 1 kOhm, 1000 pF, 15 V clamped network. This circuitry provides virtual ground lift for audio frequencies while allowing unwanted signals to bleed to ground. When assembling cables, make sure all three pins are connected on both ends. Telescopic grounding is not recommended.

Shorting the shield of the audio input to the chassis of the CAL may cause a ground loop, resulting in hum.

Looping CAL Loudspeakers

The Analog input connectors allow multiple CAL loudspeakers to be looped from a single audio source. Connect the loop output pins of the first loudspeaker to the input pins of the second loudspeaker, and so forth. The loop output pins are wired in parallel to the input pins and transmit the unbuffered source signal even when the loudspeaker is powered off.

Phoenix cable wired for looped audio

To avoid distortion when looping multiple CAL 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 20 dBV (10 V rms into 600 ohms) to yield the maximum peak SPL over the operating bandwidth of the loudspeaker.

To calculate the load impedance for the looped loudspeakers, divide 10 kOhms (the input impedance for a single CAL) by the number of looped loudspeakers. For example, the load impedance for 10 CAL loudspeakers is 1000 ohms (10 kOhms / 10). To drive this number of looped loudspeakers, the source device should have an output impedance of 100 ohms or less.

Note

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

• Make sure that cabling for looped loudspeakers is wired correctly (shield to shield, positive to positive, and negative to negative) to prevent the polarity from being reversed. If one or more loudspeakers in a system have reversed polarity, frequency response and coverage can be significantly degraded.

Digital AES/EBU (4)

AES/EBU Input Connector

The digital input uses a Phoenix 6-pin male connector and accepts an AES3 digital audio signal. The digital audio source is received via the connector’s top three pins (shield, positive, and negative). The connector’s bottom three pins are not used. The pins for the digital connector are clearly labeled on the CAL user panel.

Note

The AES/EBU port accepts single-channel (mono) digital audio sources. When connecting AES/EBU audio sources to CAL, you must specify in Compass control software whether the left channel (AES L) or right channel (AES R) will be used

On/Status LED

During normal operation, CAL’s On/Status LED is green. If the loudspeaker’s internal temperature reaches 75° C (167° F), the LED turns solid yellow and the loudspeaker’s gain is reduced by 3 dB. Though CAL will continue to operate normally with the lower gain, when the On/Status LED is yellow, this is an indication that the loudspeaker is reaching its maximum heat dissipation and a reduction of input level is recommended. When the loudspeaker’s internal temperature cools to 60° C (140° F), the amplifier returns to normal operation.

Limit LEDs

When the audio input level of a CAL would cause the amplifiers to exceed the maximum output levels for its drivers, CAL, limiting is engaged and is indicated by the two Limit LEDs on the CAL user panel. The left LED indicates limiting for low-frequency channels while the right LED indicates limiting for high-frequency channels. When engaged, limiting not only protects the drivers, but also prevents signal peaks from causing excessive distortion in the amplifier channels, thereby preserving headroom and maintaining smooth frequency responses at high levels. When source levels return to normal, below the limiter’s threshold, limiting ceases.

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

The Logic I/O connectors provide a range of control and monitoring for CAL, including changing presets, overriding and muting the input signal, monitoring loudspeaker faults, and providing voltage output. The Logic I/O connectors are optically isolated from the CAL loudspeaker circuitry. The three COM pins are isolated from each other to set the reference voltage for their associated logic pins. A logic pin is triggered when it receives a voltage of 3 to 20 V DC greater than its associated COM voltage.

Presets 1–4

Preset Pins

CAL presets recall loudspeaker settings for beam control and processing (5-band parametric EQ, gain, and delay). Presets are edited in Compass Control Software. An unlimited number of presets can be saved and stored on your computer but only four presets can be stored in the CAL loudspeaker. When CAL is not connected to a computer, presets can be selected by sending control voltages to the A1 and A2 pins.

The table below illustrates the logic for selecting presets with control voltages.

Table 2. CAL Preset Selection Logic

	A1	A2
Preset 1	0	0
Preset 2	1	0
Preset 3	0	1
Preset 4	1	1

For example, to select preset 2, a voltage of 3 V DC is sent to the A1 pin while 0 V DC is sent to the A2 and COM pins.

Note

The A1 and A2 pins are triggered when receiving a voltage of 3 to 20 V DC greater than their associated COM voltage.

CAL Factory Presets

A summary of the beam settings for the CAL factory presets is shown in Table 2. CAL ships from the factory with these presets loaded into the loudspeaker. The presets can be edited and overwritten with Compass Control Software.

Tip

For more information, refer to the Compass support videos: meyersound.com/product/compass/#support-videos.

Table 3. CAL Factory Presets

	Vertical Beam Angle	Vertical Beam Spread	Vertical Beam Split
Preset 1	0°	5°	None
Preset 2	5°	5°	None
Preset 3	-17°	25°	None
Preset 4	-30°	5°	None

Fault Contact Pins

The Fault Contact pins report when CAL shuts down or is no longer active. When CAL is powered on and working normally, the NO (normally-open) pins are open and the NC (normally-closed) pins are shorted together. When the loudspeaker is powered off, its internal relays switch so that the NO (normally-open) pins are shorted and the NC (normally-closed) pins are opened. The three Fault Contact pins are provided to accommodate monitoring for either short circuits or open circuits.

Override and Mute

Override and Mute Pins

For installations where CAL is part of a fire alarm or evacuation system, the loudspeaker’s active audio input (main program source) can be muted or replaced with an override input (alarm or emergency announcement source). The mute or override can be triggered with a relay closure attached to the Mute or Override pins.

The Mute pin is triggered when it receives a voltage of 3 to 20 V DC greater than its associated COM pin. When triggered, the Mute pin instructs CAL to mute its audio output.

The Override pin is triggered when it receives a voltage of 3 to 20 V DC greater than its associated COM pin. When triggered, the Override pin instructs CAL to override the active audio input with the override input. Both the active input and override input are specified in Compass control software.

+5 V DC Power Source

+5 V DC Pins

CAL offers a local +5 V DC power source as a convenient means for controlling its Logic I/O features. The +5 V DC pins provide an isolated +5 V DC output that can be connected to any of the Logic I/O pins through an external relay or switch, eliminating the need for an external control voltage. The +5 V DC pin is fused at 0.35 A.

Ethernet and AVB Ports

CAL’s Ethernet and AVB ports use RJ-45 Ethernet connectors and allow the loudspeaker to be connected to a standard computer Ethernet port, network router, or switch with a CAT- 5e (or better) cable. Each port uses the IPv6 protocol for network communication and has an independent Media Access Control (MAC) address that is static and preassigned.

When CAL is connected to a Mac or Windows-based computer, Compass Control Software lets you configure beam spread and beam angle, and upload these settings as a preset to CAL. Compass Control Software also includes an RMS tab for remote monitoring of all CAL loudspeakers on the network.

The Ethernet and AVB ports accept AVB-enabled Ethernet connections for integrated AVB audio and Compass control.

AVB audio stream inputs can be used as audio sources. In Compass control software, AVB audio streams for the port can be specified as the active input or override input.

Ethernet and AVB Port LEDs

The yellow and green LEDs on each port indicate connection status and data traffic, as on standard Ethernet ports.

The OLED button is located in the upper right of the CAL user panel. During startup, the OLED displays the CAL loudspeaker’s Network port addresses. The addresses can also be viewed after startup.

Pushing the OLED button cycles through: Firmware version, MAC address/ID, Name, AVB Group/System name, Media Clock status, and AVB status.

CAL employs a combination of natural convection and forced air in its cooling system. The amplifier’s heat sink provides natural convection cooling from the air flowing near its fins. In addition, a single-speed fan circulates air internally to ensure that CAL remains operational when exposed to high ambient temperatures or when driven continuously at high output levels.

A user panel cover is included with CAL to protect the connectors from dust in indoor installations and the environmental conditions of outdoor installations. The cover is installed by default and must be removed to gain access to the user panel.

CAL User Panel Cover

Removing and Installing the User Panel Cover

Procedure. To remove and install the user panel cover:

1. Use a screwdriver to remove the four pan head Phillips 10-32 x 0.75-inch screws, securing the user panel cover to the CAL loudspeaker. The four washers adhered to the user panel should remain in place.

2. Attach any required cables to the user panel connectors.

3. Reattach the user panel cover, securing it with the previously removed pan head Phillips 10-32 x 0.75-inch screws, ensuring that the washers remain in place between the user panel and cover.

   CAL User Panel Cover Attachment

All CAL loudspeakers have fixed horizontal coverage of 120°.

Horizontal Coverage

All CAL loudspeakers include vertical beam angles of ±30° in 1° increments. The beams can also be of any supported vertical spread (from 5° to 30°).

+30° Beam Angle with 5° Beam Spread

–30° Beam Angle with 5° Beam Spread

All CAL loudspeakers include vertical beams with variable spreads from 5° to 30° in 5° increments. The vertical beams can also be steered.

Minimum Vertical Beam Spread, 5°

Maximum Vertical Beam Spread, 30°

The figure below illustrates the vertical acoustical center points for the three CAL models, from which the beams emanate. The acoustical center points also represent the axis for beam angles.

Acoustical Center Points for CAL 32, CAL 64, and CAL 96

The CAL 64 and CAL 96 models include beam split coverage modes to aim sound toward two destinations or to avoid reflective surfaces such as a balcony. The beam splits can also be configured with beam angles (see Vertical Beam Angle) and beam spreads (see Vertical Beam Spread).

CAL 64 Center Split Beams

The CAL 64 and CAL 96 models include beam split coverage modes to aim sound toward two destinations or to avoid reflective surfaces such as a balcony. The beam splits can also be configured with beam angles (see Vertical Beam Angle) and beam spreads (see Vertical Beam Spread).

CAL 64 Center Split Beams with 5° Beam Spread

CAL 96 Top Split Beams

The CAL 96 model includes a top split beam coverage with the top beam emanating from the top 32 drivers and the bottom beam emanating from the bottom 64 drivers. The figure below shows a CAL 96 with top split beams, each with 5° beam spread. Also illustrated are the beams’ acoustical center points.

CAL 96 Top Beam Split with 5° Beam Spread

Note

When using the CAL 96 top split beam configuration, the bottom beam utilizes more driver channels and therefore yields greater SPL than the top beam.

CAL 96 Bottom Split Beams

The CAL 96 model also includes a bottom split beam coverage with the top beam emanating from the top 64 drivers and the bottom beam emanating from the bottom 32 drivers. The figure below shows a CAL 96 with bottom split beams, each with 5° beam spread. Also illustrated are the beams’ acoustical center points.

CAL 96 Bottom Beam Split with 5° Beam Spread

Note

When using the CAL 96 bottom split beam configuration, the top beam utilizes more driver channels and therefore yields greater SPL than the bottom beam.

Compass may be used to manage CAL when AVB inputs are used.

CAL can receive AVB audio streams (AAF) and clock streams (CRF). CAL can transmit CRF streams to other devices, but cannot transmit AVB/AAF audio streams to other devices.

Configuring CAL Network Settings

When Compass is connected to a CAL, select the CAL>Control>AVB tab to manage the AVB inputs and make Clock Mode selections.

Compass CAL Control>AVB Tab

The AVB tab allows the CAL Entity and Group Names to be changed and displays the IPv6 and MAC Addresses, as well as the device’s Serial Number.

AVB Clock Selection and System Clock

As with other CAL input signal types, when the connection is made, it must be selected as the Active Input in the Input Settings tab for the signal to be reproduced.

CAL Control and Input Settings Tab in Compass

The Clock Mode also must be set, typically to the appropriate CRF stream. After the Clock Mode has been selected, ensure the Clock Status is updated to “Locked.”

CAL Control and AVB Tab Showing Clock Status as Locked

AVB Input Selection

AVB Input Settings: each CAL has three audio sinks to receive AVB/AAF input signals and one clock sink to receive a CRF clock signal.

Media Clock Selection

For each AVB input, any available AVB stream from a Talker on the network can be selected as the clock stream. Media Clocks should never be cascaded. The same Media Clock should almost always be used for every device on the network.

Secondary Network Connections

There is no option to select to connect a Secondary network. If the CAL is connected to two networks, it will connect to the Secondary by default.

AVB Channel Select Pop-Up

When the AVB stream connection is established, it is displayed next to the input channel label.

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

CAL comes standard with wall mount brackets that include the following components.

Table 5. CAL Wall Mount Bracket Components

Item		Part Number	Fasteners Included?
Wall Mount Plate (Top)		64.210.018.01 (Black) 64.210.018.02 (White)	No (Use fasteners appropriate for wall material)
Wall Mount Plate (Bottom)		64.210.031.01 (Black) 64.210.031.02 (White)	No (Use fasteners appropriate for wall material)
Loudspeaker Bracket (Top)		64.210.015.01 (Black) 64.210.015.02 (White)	Required Parts: 119.060, 119.059, 113.043, 116.028, 109.051, 101.349 X 2 (for ONE end) 101.522 X 2 (for ONE end), 115.025 X 2 (for ONE end)
Loudspeaker Bracket (Bottom)		64.210.032.01 (Black) 64.210.032.02 (White)	Required Parts: 119.060, 119.059, 113.043, 116.028, 109.051, 101.349 X 2 (for ONE end) 113.522 X 2 (for ONE end), 115.025 X 2 (for ONE end)
End cap (Top)		60.210.012.01 (Black) 60.210.012.02 (White)	Required Parts: 101.562 X 2 (for ONE end), 119.061 X 2 (for ONE end)
End cap (Bottom)		60.210.013.01 (Black) 60.210.013.02 (White)	Required Parts: 101.562 X 2 (for ONE end), 119.061 X 2 (for ONE end)
5/16x5” Quickrelease pins (2)		134.046	—

CAL loudspeakers come with their loudspeaker brackets. After installing the wall mount plates, attach the brackets to the loudspeaker, install CAL onto the wall, rotate the loudspeaker to adjust its horizontal coverage, tighten the top and bottom nuts, and attach the end caps.

Meyer Sound offers an optional single point hang rigging kit (PN 40.210.230.01) for applications where hanging a CAL loudspeaker is desirable.

Installation of Single Point Hang Kit

Please verify presence of all kit components (Table 4) before beginning the install procedure.

Table 6. Single Point Hang Rigging Kit Contents

Part Number	Description	Quantity
67.210.094.01	1-inch diameter Neoprene Gasket, 3/16-inch thick for attaching single point hang (SPH) bracket to CAL	1
45.210.230.01	Single Point Hang Rigging Assembly	1
109.051	Thin Hex Nut, 1/2-inch-13, stainless steel for attaching SPH bracket to CAL	1
113.043	Washer, 0.88-inch outside diameter, 0.02-inch thick, stainless steel	2 (1 for eye bolt, 1 for attaching SPH bracket to CAL
119.061	Washer, sealing, #10, stainless steel for attaching SPH bracket to CAL	1
119.060	Teflon Bushing, 0.50-inch x 0.56-inch to cover stud on CAL	1
124.144	Eye bolt, Shoulder, 1/2-inch-13 x 1.5-inch, 2400 WLL	1
109.053	Hex Nut, 1/2-inch-13 X 7/8-inch wide, 31/64 inches high, stainless steel for attaching eye bolt	1
124.145	Shackle, Screw, 3/8-inch, 2000 WLL	1
640.096	Thread locker, Medium Strength, Removable, for eye bolt and SPH bracket/ bolt	1

Installation Steps

1. Remove both screws and sealing washers from the dress cap and set aside.

2. Remove the hex nut, washers, and bushing securing the wall bracket to the loudspeaker. Remove the bracket.

3. Slide the single point bracket onto the exposed threaded stud.

4. Align the front with the two protrusions.

5. Slide over the exposed threads in the order indicated:

   1. rubber gasket (PN 67.210.094.01),

   2. metal washer (PN 113.043).

6. Reattach the nut removed in Step 2 (PN 109.051). Meyer Sound recommends applying the included Loctite and using a torque value of 30 ft-lb (40.5 N·m).

7. Install the eye bolt into the correct hole for the speaker being used. Use the washer (PN 113.043) and the nut (PN 109.053) supplied. Meyer Sound recommends applying Loctite and using a torque value of 30 ft-lb (40.5 N·m).

   Caution

   There is one hole for the CAL 32 and the other is for CAL 64 or CAL 96.

8. Slide the dress cap over the single point hang bracket.

9. Secure the dress cap with the screws and sealing washers (PN 119.061) removed in step 1. There are 2 extra washers included in the kit in case the original ones are damaged. Meyer Sound recommends applying the included Loctite and using a torque value of 22 in-lb (2.5 N·m).