Sherbourn PA 12-45, User Manual

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Page 3: ...5 REFER ALL SERVICE TO QUALIFIED SERVICE PERSONNEL To reduce the risk of electrical damage verify that no short circuits are present between terminals and or speaker wires before applying power Do not install the PA 12 45 near or above any heat sources such as radiators heating vents or other apparatus that produces heat Do not block any ventilation openings or heat sinks Avoid installing the PA 1...

Page 4: ... found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communic...

Page 5: ...his manual 2 Mechanical and environmental 3 Inputs and outputs 4 Installation tips 5 Configuration 6 Performance specifications 9 Features 10 Operation 11 Periodic maintenance 12 Troubleshooting 13 Sherbourn Technologies LLC Ten Year Limited Warranty 14 Notes 15 PA 12 45 12 CHANNEL DISTRIBUTED AUDIO AMPLIFIER ...

Page 6: ...controls work and how to perform common operations You may wish to record serial numbers or other purchase information on the Notes page at the back of this manual The PA 12 45 The PA 12 45 provides 12 independent channels of audiophile quality class A B power amplification nominally arranged into six stereo zones Each channel can receive signal either from one of two input busses or from its own ...

Page 7: ...sts no rack ears Weight 28 lbs 12 7 kg unboxed 35 9 lbs 16 3 kg boxed Rack mountable Yes with optional Rack Handles Brackets Power requirements 115 VAC or 230 VAC 10 50 60 Hz selectable by rear panel switch Power consumption Pp to 500 watts under maximum load Ventilation and cooling To avoid overheating be sure to provide adequate clearance and ventilation top and bottom PA 12 45 ...

Page 8: ...tus LEDs 6 blue indicates normal operation flashing blue indicates a fault each LED indicates the status of one zone channel pair Zone Status LEDs are not lit in Standby mode Rear panel controls and indicators Power rocker switch switches main power Input Voltage protected slide switch selects 115 or 230 VAC line voltage Power Mode slide switch Auto On Triggered Bridge Mode switch 6 labelled BR ST...

Page 9: ...s input from Bus 1 or Bus 2 it receives its signal from the Right input of that bus When a pair of channels is in Bridged mode and is not configured to receive its input from a bus the Input Input selector switch and Volume control on the odd numbered channel input of the pair are active and those on the even numbered channel input are ignored Ventilation and cooling Even though the PA 12 45 is qu...

Page 10: ... Mode is set to trigger the PA 12 45 will switch On when a trigger signal is received and will return to Standby mode when the Trigger signal is no longer present Note Always switch the PA 12 45 Off and then back On using the REAR PANEL POWER SWITCH after changing the setting of the Power Mode switch Zone and Input Configuration The PA 12 45 is arranged as six zones with two channels in each zone ...

Page 11: ...lationship between the channels and the input busses When a given bus is selected as the source for a particular channel odd numbered channels will receive input from the Right Input for the chosen bus and even numbered channels will receive input from the Left Input for the chosen bus That way if you select a certain bus as the source for both channels in a zone the two channels in that zone will...

Page 12: ...re active in Bridged mode the controls from the odd numbered channel are active in this configuration and those in the even numbered channel are ignored The Volume control from the odd numbered channel is used to control gain and the Input Selector switch from that channel is used to select the input source If Line In is selected then the unbalanced RCA input jack directly below the active odd num...

Page 13: ...watts RMS per channel x6 into 8 ohms bridged two channels driven 80 watts RMS per channel x6 into 8 ohms bridged all channels driven 32 watts RMS per channel x12 into 8 ohms S N ratio 95 dB A weighted Frequency response 20 Hz to 20 kHz 0 2 dB at 1 watt 2 0 dB at 80 kHz Trigger and control Trigger Input 3 20 V AC or DC Trigger Output 12 V DC 100 mA max Protection The PA 12 45 is protected against e...

Page 14: ...stereo input busses and individual channel insert points Always on auto sense and triggered power modes Convection cooled with fan assisted Massive toroidal power supply Full sized five way binding posts Front panel zone status indicators Intelligent protection from electrical faults Intelligent protection from thermal faults and overheating Independent zone fault protection allows other zones to ...

Page 15: ...by the presence of a trigger signal at the rear panel Trigger Input The PA 12 45 will remain On as long as a trigger signal is present at the Trigger Input Operating the PA 12 45 in Auto Mode When the Power Mode is set to Auto the PA 12 45 is controlled by the presence of audio signal at ANY input The PA 12 45 will switch On immediately when an audio signal is detected at any input and will return...

Page 16: ... with a soft rag If something sticky gets on the front panel or case of the PA 12 45 it should be cleaned with a mild cleaning solution applied to a soft rag followed by wiping with a clean rag dampened with plain water and drying with a soft dry rag or cloth Note DO NOT spray water or cleaning solution directly onto the PA 12 45 or into the vents ...

Page 17: ... The PA 12 45 is On and is not indicating a fault Verify that the input configuration for that channel is correct Check the Bridge Stereo switch that controls the pair of channels involved Verify that the Volume for that channel is turned down Check your source and your input cabling Check your speakers and speaker connections Problem No sound is heard from one or more channels one or more channel...

Page 18: ...WARRANTY SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU A claim under this warranty must be made by you within the Term A claim shall not be valid and Sherbourn has no obligation related to the claim if it is not made within the Term and if it is not made in strict compliance with the requirements of the How do you get servic...

Page 19: ...umber on the outside of the box will be refused Sherbourn Technologies LLC Attn Repair Department 135 Southeast Parkway Court Franklin TN 37064 How does state law apply This warranty gives you specific legal rights and you may also have other rights which vary from state to state CERTAIN STATES HAVE ENACTED LAWS WHICH PRECLUDE THE WAIVER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES AND OR PRECLUDE THE ...

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