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Summary of Contents for Gentner PA870
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Page 1: Channel Power Amplifier
8-Channel Power Amplifier BETA Installation & Operations Manual Perfect Communication through Technology, Service, and Education. - Page 2 Gentner Part No. 800-165-001 January 2000 (Rev. 1.0) ©2000 by Gentner Communications Corporation. All rights reserved. No part of this manual may be reproduced in any form or by any means without written permission from Gentner Communications Corporation. Printed in the United States of America.
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Page 3: Table Of Contents
able of Contents 1. Introduction ........3 Description . - Page 4 TABLE OF CONTENTS TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760...
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Page 5: Introduction
Applications chapter on page 11. The PA870 delivers 25 watts (at 8 ohms and 70 volts) of power to each of the eight channels. It also allows bridging in an 8 Ohm, one-channel input/two-channel output configuration for 50 watts of power. - Page 6 INTRODUCTION • PA870 AMPLIFIER TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760...
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Page 7: Installation And Operation
Support at 1.800.283.5936 or 1.801.974.3760. amplifier near sources of heat or expose it to The PA870 is designed to use two rack spaces. Gentner recommends moisture, direct sunlight, excessive that you install the PA870 in a standard 19” rack. dust, or vibration. -
Page 8: Figure 1. Front Panel
INSTALL ATION AND OPERATION • FRONT PANEL TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760... -
Page 9: Rear Panel
INSTALL ATION AND OPERATION • REAR PANEL Rear Panel TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760... - Page 10 Connect the speakers to these posts. 7. Molex Plug Receptacles. A Molex plug (eight are included with your PA870) must be plugged into either the 70V or 8Ω Molex plug receptacle of each channel. Insert a Molex plug into the 70V receptacle to configure a channel for 70V operation.
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Page 11: Figure 3. Balanced/Unbalanced Input Device Connections
INSTALL ATION AND OPERATION • BAL ANCED AND UNBAL ANCED INPUTS The PA870 can operate with balanced input devices (such as a mixer or equalizer) and unbalanced input devices (such as a CD player or tape deck). Figure 3 (below) shows rear panel balanced and unbalanced input connections. - Page 12 INSTALL ATION AND OPERATION • BAL ANCED AND UNBAL ANCED INPUTS TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760...
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Page 13: Applications
APPLICATIONS • 8 OHM OUTPUT Applications 8 Ohm Output The PA870 Power Amplifier is suitable for a wide variety of sound reinforcement applications. These applications include multiple zones and room combining configurations such as: Boardrooms Conference Rooms Courtrooms Meeting Rooms... -
Page 14: Figure 4. 8 Ohm Configuration
APPLICATIONS • 8 OHM OUTPUT Inputs Enter System Routing Mic On Meter Outputs SIGNAL SIGNAL SIGNAL SIGNAL CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 CHANNEL 5 CHANNEL 6 CHANNEL 7 CHANNEL 8 SIGNAL SIGNAL SIGNAL SIGNAL BRIDGE 1 BRIDGE 1 CLIP 1 CLIP 2 CLIP 3... -
Page 15: Bridged
APPLICATIONS • BRIDGED OUTPUT Bridged Output Channel pairs 1-2, 3-4, 5-6, and 7-8 may be bridged in a one-channel NOTE: Channels configured input/two-channel output configuration for a maximum of 50 watts of for 70V output cannot be output power—at 4 or 8 Ohms—per bridged channel pair. Maximum bridged. -
Page 16: Volt
APPLICATIONS • 70 VOLT OUTPUT 70 Volt Output The PA870 produces up to 25 watts per channel in the 70 volt mode. The PA870 cannot operate as bridged in the 70 volt mode. Refer to Figure 6 (below) to configure your PA870 for 70 volt output. Ensure that the Molex plug is connected to the 70V receptacle. -
Page 17: Appendices
APPENDICES • SPECIFICATIONS Appendices Specifications DIMENSIONS (W/H/D): 19˝ (48cm) x 13˝ (33cm) x 3 ⁄ ˝ (9cm) WEIGHT: 30 lbs. (13.6 kg) POWER REQUIREMENTS: 120, 240VAC, 50-60Hz. POWER CONSUMPTION: 600 Watts CONNECTORS (each channel): Input: Removable Phoenix (line-level only) Output: “Touch-proof” binding posts AUDIO PERFORMANCE General Voltage Gain (dB): Single Input: 26dB... - Page 18 APPENDICES • SPECIFICATIONS 8 Ohm Configuration Output Power Per Channel at 1KHz: 25 Watts THD: <.01% at rated power Crosstalk: Better than 90dB Intermod Distortion: Better than .025% 70 Volt Configuration Output Power Per Channel at 1KHz: 25 Watts THD: <.01% at rated power High Pass Filter: -3.5dB @60Hz Crosstalk: Better than 85dB Intermod Distortion: Better than .025%...
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Page 19: Troubleshooting
APPENDICES • TROUBLESHOOTING Troubleshooting Possible Causes Problem Amp not connected to AC power No sound Power switch is OFF Gain control(s) adjusted too low Channel input(s) incorrectly wired Speaker(s) not connected Mismatch between channel input and output connections Circuit breaker for power switch is tripped (turn the switch off, then on again to reset circuit breaker) Molex plug not connected to either the 8Ω... -
Page 20: Warranty
D. The equipment’s original serial number has been modified or removed. E. The equipment is not returned in Gentner-approved packaging. NO OTHER WARRANTY, EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY... -
Page 21: Warranty Registration
Salt Lake City, UT 84119 Warranty Registration Please register your PA870 online by visiting Gentner Technical Support on the Web at www.gentner.com. When your product is properly registered, Gentner Communications will be able to serve you better should you require technical assistance or desire to receive upgrades, new product information, etc. - Page 22 Perfect Communication through T echnology, Service, and Education. ™ Gentner Communications Corporation 1825 Research Way, Salt Lake City, UT 84119 Phone:1.800.945.7730 / +1.801.975.7200 Fax: 1.801.977.0087 Web: www.gentner.com Manual Part No. 800-165-001 Rev. 1.0...
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