Gentner PA870 Installation & Operation Manual Download Page 11 | Manualshive

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TECHNICAL SUPPORT:

1.800.283.5936 (USA) OR 1.801.974.3760

INSTALL ATION AND OPERATION •

BAL ANCED AND UNBAL ANCED INPUTS

9

+ -

ê

+ -

ê

Balanced Input

Unbalanced Input

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. Note that with the unbalanced input source, the ground
terminal is not used.

Tip

Ring

Ground (sleeve)

Tip

Negative (sleeve)

Phoenix Plug

Figure 3. Balanced/Unbalanced
Input Device Connections

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Summary of Contents for PA870

Page 1: ...Perfect Communication through Technology Service and Education TM Installation Operations Manual 8 Channel Power Amplifier PA870 ...

Page 2: ...poration Printed in the United States of America Gentner Communications Corporation reserves specification privileges Information in this manual is subject to change without notice Manual Development Mike Raymond Artwork and Illustrations Jim Wright Laurie Lingmann and Mike Raymond This equipment meets regulatory compliance standards for CSA C22 2 No 1 98 Safety Standard for Audio Video and Simila...

Page 3: ...8 Ohm 11 Bridged 13 70 Volt 14 4 Appendices 15 Specifications 15 Troubleshooting 17 Warranty 18 Warranty Registration 19 List of Figures Figure 1 Front Panel 6 Figure 2 Rear Panel 7 Figure 3 Balanced Unbalanced Input Device Connections 9 Figure 4 8 Ohm Configuration 12 Figure 5 Bridged Output Configuration 13 Figure 6 70 Volt Configuration 14 able of Contents T ...

Page 4: ...TECHNICAL SUPPORT 1 800 283 5936 USA OR 1 801 974 3760 TABLE OF CONTENTS 2 ...

Page 5: ... Ohm one channel input two channel output configuration for 50 watts of power Bridge switches simplify bridging setup and protect against damaging cross connections Four LEDs indicate bridging status Presence and clip LEDs on the front and back panels notify you of signal status and help you minimize clipping The PA870 requires just two rack units of space so it conveniently fits in a small space ...

Page 6: ...TECHNICAL SUPPORT 1 800 283 5936 USA OR 1 801 974 3760 INTRODUCTION PA870 AMPLIFIER 4 ...

Page 7: ...o secure the amplifier s cabinet to rails at least 0 1 thick If you install the unit in an enclosed box or cabinet ensure that ventilation holes are provided so that air circulation can cool the amplifier The front panel see Figure 1 page 6 features an ON OFF power switch with a red ON LED The other LED indicators show signal presence clip one per channel and bridge status Each presence clip LED i...

Page 8: ...T PANEL 6 1 Power Switch Switches amplifier ON 2 Power Switch LED Illuminates red when the power switch is ON 3 Signal Clip LED Illuminates green to show signal presence red to indicate clipping 4 Bridge LED Illuminates amber when the bridging switch is ON Figure 1 Front Panel 3 4 3 2 1 ...

Page 9: ...CHANNEL 5 CHANNEL 6 CHANNEL 7 CHANNEL 8 OUTPUT CHANNEL 3 OUTPUT CHANNEL 1 OUTPUT CHANNEL 2 OUTPUT CHANNEL 4 OUTPUT CHANNEL 5 OUTPUT CHANNEL 6 OUTPUT CHANNEL 7 OUTPUT CHANNEL 8 SIGNAL CLIP 1 SIGNAL CLIP 2 VOLUME 2 SIGNAL CLIP 3 SIGNAL CLIP 4 VOLUME 4 VOLTAGE 110V 5A FREQUENCY 60Hz SIGNAL CLIP 5 SIGNAL CLIP 6 VOLUME 6 SIGNAL CLIP 7 SIGNAL CLIP 8 VOLUME 8 VOLUME 7 VOLUME 5 VOLUME 3 VOLUME 1 70V CH1 8...

Page 10: ...bank of receptacles handles all inputs to the amplifier The amplifier does not accommodate mic level inputs When making connections be sure to match polarity 5 AC Power Receptacle Connect the power cord included with the amplifier to this receptacle 6 Output Binding Posts The output binding posts accept bare wire or banana plugs Connect the speakers to these posts 7 Molex Plug Receptacles A Molex ...

Page 11: ...ith 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 Note that with the unbalanced input source the ground terminal is not used Tip Ring Ground sleeve Tip Negative sleeve Phoenix Plug Figure 3 Balanced Unbalanced Input Device Connections ...

Page 12: ...TECHNICAL SUPPORT 1 800 283 5936 USA OR 1 801 974 3760 INSTALLATION AND OPERATION BALANCED AND UNBALANCED INPUTS 10 ...

Page 13: ...oom combining configurations such as Boardrooms Conference Rooms Courtrooms Meeting Rooms Training Rooms Small Auditoriums Houses of Worship Intercom Systems Medical Facilities When configured for 8 Ohm non bridged output the amplifier provides a maximum power output of 25 watts per channel Figure 4 page 12 shows a complete 8 Ohm installation Applications 8 Ohm Output APPLICATIONS 8 OHM OUTPUT 11 ...

Page 14: ...70V CH 7 8Ω CH 7 70V CH 8 8Ω CH 8 70V CH1 8Ω CH 1 70V CH 2 8Ω CH 2 70V CH 3 8Ω CH 3 70V CH 4 8Ω CH 4 70V CH 5 8Ω CH 5 70V CH 6 8Ω CH 6 70V CH 7 8Ω CH 7 70V CH 8 8Ω CH 8 VCR 1 2 3 4 5 7 6 8 0 4 10 30 4 8 12 System Meter Mic On Inputs Outputs Routing Enter Esc 8Ω 16Ω 16Ω 4Ω 4Ω Series Parallel SIGNAL CLIP 1 SIGNAL CLIP 2 VOLUME 2 VOLUME 1 BRIDGE 1 SIGNAL CLIP 3 SIGNAL CLIP 4 VOLUME 2 VOLUME 1 BRIDGE ...

Page 15: ...stem Meter Mic On Inputs Outputs Routing Enter Esc 16Ω 16Ω Gain Adjust Amber No function 8Ω 4Ω 4Ω SIGNAL CLIP 3 SIGNAL CLIP 4 VOLUME 2 VOLUME 1 BRIDGE 1 SIGNAL CLIP 5 SIGNAL CLIP 6 VOLUME 2 VOLUME 1 BRIDGE 1 SIGNAL CLIP 7 SIGNAL CLIP 8 VOLUME 2 VOLUME 1 BRIDGE 1 Zone 2 Series Zone 3 Parallel Zone 1 Figure 5 Typical Bridged Output Configuration Channel pairs 1 2 3 4 5 6 and 7 8 may be bridged in a ...

Page 16: ...2 70V CH 3 8Ω CH 3 70V CH 4 8Ω CH 4 70V CH 5 8Ω CH 5 70V CH 6 8Ω CH 6 70V CH 7 8Ω CH 7 70V CH 8 8Ω CH 8 70V CH1 8Ω CH 1 70V CH 2 8Ω CH 2 70V CH 3 8Ω CH 3 70V CH 4 8Ω CH 4 70V CH 5 8Ω CH 5 70V CH 6 8Ω CH 6 70V CH 7 8Ω CH 7 70V CH 8 8Ω CH 8 VCR 1 2 3 4 5 7 6 8 0 4 10 30 4 8 12 System Meter Mic On Inputs Outputs Routing Enter Esc 5W 5W 5W 5W 10W 10W BRIDGE 3 BRIDGE 4 BRIDGE 1 BRIDGE 2 Parallel Zone 1...

Page 17: ...e level only Output Touch proof binding posts AUDIO PERFORMANCE General Voltage Gain dB Single Input 26dB Differential Input 32dB Sensitivity for rated power 8 Ohms 1 0 Vrms Distortion SMPTE IM less than 0 05 Frequency Response 20Hz to 20 KHz 1dB full rated power Damping Factor Greater than 120 Noise 105dB below rated output A weighted Input Impedance 10k Ohms balanced 5k unbalanced Appendices Spe...

Page 18: ...rtion Better than 025 Bridged Configuration Output Power Per Bridged Channel Pair from 20Hz 20kHz 50 Watts into 8Ω THD 05 at rated power Crosstalk Better than 90dB Intermod Distortion Better than 025 CONTROLS Front AC switch AC circuit breaker Back Bridge switch Ch 1 to Ch 8 gain knobs Indicators Power On Red On Off switch Signal Presence Clip Green Red LED front rear Bridging Amber LED front rear...

Page 19: ...er 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 or 70V receptacle of a given channel Molex plug is in the 8Ω receptacle rather than the 70V receptacle Molex plug is in the 70V receptacle rather than the 8Ω receptacle Molex plug is...

Page 20: ...Y IS VOID IF A The equipment has been damaged by negligence accident act of God or mishandling or has not been operated in accordance with the procedures described in the operating and technical instructions or B The equipment has been altered or repaired by other than the Manufacturer or an authorized service representative of the Manufacturer or C Adaptations or accessories other than those manu...

Page 21: ...ch notice the Manufacturer will give instructions respecting the shipment of the equipment or such other matters as it elects to honor this warranty as above provided This warranty does not cover damage to the equipment during shipping and the Manufacturer assumes no responsibility for such damage All shipping costs shall be paid by the customer This warranty extends only to the original purchaser...

Page 22: ...orporation 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 Perfect Communication through T echnology Service and Education ...

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