Meyer Sound Documentation

When powering up the USW-112XP loudspeaker, the following startup events occur and are indicated by the LED:

The USW-112XP LED illuminates yellow when the loudspeaker’s signal rises 2 dB above the limiting threshold, indicating that a safe, optimal level has been exceeded. When limiting is engaged, gain is reduced. The limiter protects the driver and prevents signal peaks from causing excessive distortion in the amplifier, thereby preserving headroom and maintaining a smooth frequency response at high levels. When source levels return to normal below the limiter’s threshold, the LED turns green and limiting ceases.

The USW-112XP performs within its acoustical specifications at normal temperatures when the USW-112XP LED is green, or when limiting is not continuous. During continuous limiting, the loudspeaker is nearing its operational limits, resulting in the following effects:

The USW-112XP LED turns red when the loudspeaker’s input stage clips, causing the amplifier to overload. The source level must be reduced.

Cable lengths up to 150 feet between the USW-112XP and its external power supply are supported with only 1 dB of peak SPL loss using 18 AWG wire. Longer cable lengths are possible with heavier gauge wires, as described in the table below.

The maximum cable length for a USW-112XP can be calculated with the following formula:

maximum length = 2 Ω / (2 * cable resistance in Ω/ft)

For example, the maximum length of an 18 AWG cable with a resistance of 0.00636 Ω/ft is 157.2 feet [2 /(2 * 0.00636)].

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

Meyer Sound offers two rigging options for the USW-112XP, as described in the table below. For self-weight, rigging loads and dimensional information, see USW-112XP Specifications.

The top and bottom faces of the USW-112XP cabinet each include a high-strength, corrosion-resistant stainless steel point that provides an M8 x 1.25 threaded hole for easy connection to QuickFly rigging and third-party mounting options.

USW-112XP Rigging Points

The USW-112XP also includes an integral 35 mm pole mount receptacle on one side with M20 threads for added stability.

USW-112XP Integral Pole Mount

The MUB-USW-112 U-Bracket (PN 40.298.050.01) allows a single USW-112XP loudspeaker to be mounted to a wall in either vertical or horizontal orientations, to the ceiling, onto the floor, or from a truss. The MUB-USW-112 kit includes two M8 bolts/washers and two M8 knobs/washers. The bolts are recommended for fixed installations.

USW-112XP Rigging Points

MUB-USW-112 U-Bracket Load Ratings

One USW-112XP or USW-112P can be safely mounted with the MUB-USW-112 U-bracket at a 5:1 safety factor.

When mounting a USW-112XP with the U-bracket, the U-bracket must be secured to the mounting surface with one of the configurations shown in the table below.

Table 5. Mounting Hole Configurations

Hole	Safety Factor
1/2-inch center hole	5:1
Two 1/2-inch outer holes	5:1
All four 1/4-inch corner holes	5:1
Two 1/4-inch center holes	Not rated for mounting. These holes are for pole-mounting the MUB-USW-112 using a pole-mount adapter.

Mounting Hole Locations

MUB-USW-112 Wall Mount, Horizontal

MUB-USW-112 Wall Mount, Vertical

MUB-USW-112 Ceiling Mount

The MPK-POLE-35MM-M20 (PN 40.010.973.01) provides an easy and efficient way to mount a loudspeaker (such as the ULTRA-X20XP) on top of the USW-112XP. It features a lift assist that provides approximately 40 lb of internal gas cylinder pneumatic lift.

The MPK-POLE-35MM-M20 features all steel shafts that telescope from 36.5–60 inches and employs a secure knob to hold it in a specific position. The lower end is 35 mm in diameter and has an M20 threaded lug to stabilize and make the connection to the USW-112XP pole mount more secure. The upper shaft includes the removable PAS-M8 Adapter Sleeve that fits the ULTRA-X20/22/23 M8 rigging point and a PAS-M20 Adapter Sleeve that fits internal 35 mm and M20 pole mount receptacles is available for other pole applications.

MPK-POLE with PAS-M8 in USW-112XP Pole Mount

MPK-POLE kit

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

MAPP System Design Tool

Whether planning for fixed installations or for tours with multiple venues, 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 intended, thereby eliminating unexpected coverage problems and minimizing onsite adjustments.

The key to the accuracy of MAPP’s predictions is MeyerSound’s exhaustive database of loudspeaker measurements. Performance predictions for each loudspeaker are based on 3-dimensional, 65,000+ 1/48th-octave-band measurements taken in the MeyerSound anechoic chamber. The extraordinary consistency between Meyer Sound loudspeakers guarantees that predictions from MAPP will closely match their actual performance.

MAPP software allows for configuration of MeyerSound loudspeaker systems and definition of the environment in which they operate, including air temperature, pressure, humidity, and the location of prediction surfaces. Importing both CAD (.DXF) and Sketchup (.SKP) files containing detailed venue information to act as an anchor model to the prediction surfaces and a visual aid to facilitate prediction data interpretation is also possible.

MAPP Capabilities

With MAPP, you can:

• Simulate different loudspeaker configurations to refine system designs and determine the best coverage for intended audience areas

• Model loudspeaker interactions to locate constructive and destructive interferences so that loudspeakers can be re-aimed and repositioned as necessary

• Place microphones anywhere in the Model View space and predict loudspeaker frequency response, phase response, and sound pressure levels at each microphone position

• Determine delay settings for fill loudspeakers using the Inverse Fast Fourier Transform and phase response feature

• Preview the results of signal processing to determine optimum settings for the best system response

• Automatically calculate load information for arrays to determine necessary minimum rigging capacity, front-to-back weight distribution, and center of gravity location

• Generate and export system images and system PDF reports for client presentations

• Synchronize GALAXY processor output channel settings in real-time with virtual or real GALAXY units, allowing in-the-field changes to be predicted during system alignments.

The Galileo GALAXY Network Platform is a sophisticated loudspeaker management tool for controlling all MeyerSound speaker types. The GALAXY loudspeaker processor extends a high level of audio control in driving and aligning loudspeaker systems with multiple zones. It provides a powerful tool set for corrective equalization (EQ) and creative fine-tuning for a full range of applications from touring to cinema.

Users can readily program the GALAXY processor using Compass software running on a host computer or via the Compass Go application for the iPad. Connecting MAPP to the GALAXY processor will also allow the user to push output channel settings created in MAPP as a starting point. Compass Control Software includes custom-designed settings for each family of speakers, as well as to integrate families together. For example, the Product Integration feature matches the phase characteristics between Meyer speaker families to ensure the most coherent summation.

Processing tools for inputs and outputs include delay, parametric EQ and U-Shaping EQ. Output processing also includes polarity reversal, Low-Mid Beam Control (LMBC), atmospheric correction, and All Pass filters.

The built-in summing and delay matrices allow a user to easily assign gain and delay values, respectively, at each cross point. This capability greatly facilitates using one loudspeaker to satisfy multiple purposes.

Front panel controls let a user intuitively and quickly operate a GALAXY processor without a computer during live use.

The GALAXY 408, GALAXY 816 and GALAXY 816-AES3 processor versions have the same audio processing capability with different I/O. See www.meyersound.com to locate their datasheets for more information.

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:

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 USW-112XP rain hood is smaller in height than the handle and does not protrude beyond the slanted user panel area.