Operating Instructions USW-1P Self-Powered Subwoofer (Serial Numbers 981000 and above) Copyright © 1997 Meyer Sound Laboratories, Inc. All rights reserved PN: 05.078.008.01 B Keep these important operating instructions.
Contents Introduction .......................................................... 3 AC Power ............................................................. 3 The Modular Rear Panel ....................................... 5 Amplification, Limiting, and Cooling System ..... 6 Rigging .................................................................. 6 Full-Range Systems .............................................. 7 Verifying Driver Polarity ..................................... 9 Troubleshooting ...........
Introduction • suppresses high voltage transients up to several kilovolts • filters EMI (radio frequencies and noise present on the AC line) The Integrated Design • sustains operation during low-voltage periods, which minimizes audio discontinuity The Meyer USW-1P self-powered subwoofer is composed of: • two 15-inch cone drivers. • phase-corrected, optimized control electronics; • a two-channel amplifier (550 watts total).
Current Requirements Power Connector Wiring Each USW-1P requires approximately 3 Arms @115V (1.5 Arms@230V) for proper operation, allowing up to five USW1P to be powered from one 15 A circuit. However, we recommend powering no more than three USW-1Ps per 15 A branch to allow a 30% margin for peak voltages. The USW-1P presents a dynamic load to the AC mains which causes the amount of current to fluctuate between quiet and loud operating levels.
The Modular Rear Panel The rear panel of the USW-1P has two slots for modules. The top slot contains the Audio Input Module; the bottom slot contains the optional Remote Monitoring System™ (RMS) Module. A blank plate covers the bottom slot if RMS is not installed. Audio Input There are three, interchangeable Audio Input Modules with optimized connectors and controls for different applications. Each module has a 24V Fan connector to power an optional fan (see fan section on page 6).
If either LED remains on for longer than three seconds, that channel incurs these consequences: • Increasing the input level will not increase the volume. • The system distorts due to clipping and nonlinear driver operation. While the USW-1P limiters fully protect the system under overload conditions and exhibit smooth sonic characteristics; we recommend that you do not intentionally drive the USW-1P into continuous limiting to attain compression effects.
Full-Range Systems Introductory Concepts The USW-1P is used to add low frequency SPL to sound systems. It is optimized to be used with the Meyer UPA-P series self-powered loudspeakers. It can also be used with all Meyer Sound loudspeakers. For information on integrating the USW-1P with the UPA-P, see the UPA-P Series Operating Instructions. For information on using the USW-1P with other Meyer Sound products please contact Meyer Sound Technical Support.
SPL vs. Distance to Boundary Measurement and Correction Tools As we have seen on the previous page, the placement of a USW-1P on a floor or against a boundary significantly changes the low frequency response when compared to free field measurement of the same speaker. It is recommended that even the most carefully assembled sound systems be analyzed with precise measurement tools.
Polarity within a USW-1P Verifying Driver Polarity Incorrect driver polarity impairs system performance and may damage the drivers. All Meyer loudspeakers are shipped with the drivers in correct alignment. Polarity In Adjacent Loudspeakers Use the following test procedure to verify the polarity between two USW-1P. 1. Establish a reference USW-1P, a speaker that has not been tampered with or damaged. Mark this speaker as the reference. 2. Place the USW-1P you want to test next to the reference USW-1P. 3.
Troubleshooting This section suggests several possible solutions to some common problems encountered by USW-1P users and is not intended to be a thorough troubleshooting guide. Contact Meyer Sound for additional information and documentation. The On/Temp. LED does not illuminate, there is no audio, and the power supply fan is off. 1. Make sure the AC power cable is the correct type for the regional voltage and that it is securely connected to the AC inlet then unplug and reconnect the AC cable. 2.
Safety Summary English • To reduce the risk of electric shock, disconnect the loudspeaker from the AC mains before installing audio cable. Reconnect the power cord only after making all signal connections. • Connecttheloudspeakertoatwo-pole,threewiregroundingmains receptacle. The receptacle must be connected to a fuse or circuit breaker. Connection to any other type of receptacle poses a shock hazard and may violate local electrical codes.
Rear Panel and Optional Modules The user panel and optional modules are described on page 5 of this guide.
! Front Sides 220k Ω Case Push Loop Service 1 2 3 - 24VFan Remote + Looping Audio Input CAUTION : See instruction manual ATTENTION : Voir le cahier d'instruction Monitor System Network On / Temp. Limit Meyer Sound, Berkeley, CA. USA AC Input 100-240V 50-60Hz 4A MAX ~ CAUTION Earth / Chassis Back Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, California 94702 Telephone: 510 - 486 - 1166 FAX: 510 - 486 - 8356 E-mail: techsupport@meyersound.com http://www.meyersound.
