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USM-P Series Self-Powered Loudspeaker Systems
OPERATING INSTRUCTIONS
USM-1P
USM-100P
Superior
engineering
for the art
and science
of sound.
Keep these important operating instructions.
OPERATING INSTRUCTIONS
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CONTENTS Safety Summary 3 Introduction and Technical Advantages 4 AC Power 4 The Modular Rear Panel 6 Amplification, Limiting, and Cooling System 6 Coverage 7 Verifying Driver Polarity 8 Troubleshooting 8 Specifications 10 Rear Panel and Input Modules Drawings 11 Dimensions and Contact Information 12 SYMBOLS USED THESE SYMBOLS INDICATE IMPORTANT SAFETY OR OPERATING FEATURES IN THIS BOOKLET AND ON THE CHASSIS. ! Dangerous voltages: Important operating Frame or chassis Protective earth ground ri
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! SAFETY SUMMARY ENGLISH endroit où il y a de l’eau ou une Um ein Überhitzen dem Lautsprecher To reduce the risk of electric shock, humidité excessive. zu verhindern, das Gerät vor direkter disconnect the loudspeaker from the Ne pas laisser de l’eau ou tout objet Sonneneinstrahlung fernhalten und AC mains before installing audio pénétrer dans l’haut-parleur. Ne pas nicht in der Nähe von wärmeab- cable. Reconnect the power cord only placer de r´cipients contenant un liq- strahlenden Ha
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USM-P: INTRODUCTION AND TECHNICAL ADVANTAGES Thank you for investing in the Meyer horn's wider pattern (100°H x 40°V) perceive this as a decrease to Sound USM-P Series. The USM-100P and provides broad coverage in either wedge half the SPL. When reading a USM-1P self-powered stage monitors are or flown applications. beamwidth specification, it is composed of: essential to determine whether it DESIGN BENEFITS: refers to the -6 or -10dB points one 15-inch cone driver and one 3- because they indic
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Continuous voltages higher than amount at 115V; the inrush current at an additional 30% above the minimum 264V may damage the unit. 100V is 115% of the 115V amount. amperage to prevent peak voltage drops ! at the service entry and nuisance trip- The USM-P presents a dynamic load to VOLTAGE REQUIREMENTS ping. the AC mains which causes the amount The USM-P operates safely and without of current to fluctuate between quiet POWER CONNECTOR WIRING audio discontinuity if the AC voltage and loud operati
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THE MODULAR REAR PANEL The rear panel of the USM-P has two multiple USM-Ps with a paralleled input in a positive pressure wave when a posi- slots for processor modules. The top slot loop, creating an unbuffered hardwired tive signal is applied to pin 2. With the contains the Audio Input and Control loop connection, with negligible loss in switch down (-), pin 3 is hot relative to Module; the bottom slot contains the signal level. For example, since the pin 2, resulting in a negative pressure opt
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es to 75°C (167°F), the On/Temp. LED fan, powered by the 24V Fan user panel AMPLIFIER NATURAL CONVECTION connector, blows air directly onto the changes from red to green and the lim- COOLING SYSTEM heatsink. The fan speed increases as the iter threshold returns to normal. The USM-P employs a natural convection heatsink temperature rises, which main- cooling system that depends on air flow tains a safe operating temperature with The heatsink gets too hot to from below the cabinet over the minimal
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VERIFYING POLARITY Incorrect driver polarity impairs system 4. Apply the same signal to the second DRIVER POLARITY IN THE SAME USM-P performance and may damage the dri- speaker with the first speaker still Use the following test procedure to veri- vers. All Meyer Sound loudspeakers are connected. fy polarity between drivers in the same shipped with the drivers in correct loudspeaker: alignment. The polarity is correct if the frequency response remains constant with a 5-6dB 1. Place a monitoring
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with high-quality headphones. than 30°C and this condition occurs THE AUDIO PRODUCED BY THE SPEAKER 2. Send the audio signal to another frequently, contact Meyer Sound to IS DISTORTED OR COMPRESSED BUT THE speaker to insure that the signal is order the optional Fan Kit. LIMIT LIGHT IS NOT ILLUMINATED. full-range. Turn the source level down 1. Make sure the XLR cable is securely before reconnecting the audio input See the section Amplification, Limiting, fastened to the XLR audio input con- and i
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USM-1P/100-P SPECIFICATIONS 2 1 Acoustical Operating Frequency Range 30 Hz - 20 kHz (each loudspeaker) Free Field 44 Hz - 16 kHz ±3 dB; -6 dB at 40 Hz and 20 kHz 3 Half-Space 40 Hz - 16 kHz ±3 dB; -6 dB at 33 Hz and 20 kHz 4 Phase Response ±35° 500 Hz - 16 kHz; +90° at 120 Hz 5 Maximum Peak SPL 132 dB Signal to Noise Ratio >95 dB (A-weighted noise floor to max SPL) Coverage USM-100P -6 db at 100° H x 40° V; -10 dB at 120° H x 60° V USM-1P -6 db at 45° H x 45° V; -10 dB at 60° H x 60° V C
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USER PANEL AND OPTIONAL MODULES The user panel and optional module are described on page 6 of this document. User Panel with RMS option and Polarity and Attenuaing Audio Input Module Looping, Polarity, and Attenuaing Input Module 11
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PHYSICAL DIMENSIONS All units in inches. USM-1P USM-100P CONTACT INFORMATION Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, CA 94702 tel: 510.486.1166 fax: 510.486.8356 e-mail: techsupport@meyersound.com http: www.meyersound.com 05.089.004.01 Rev A 12
