Sherbourn PA 4Z-75 User Manual Download | Manualshive

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Summary of Contents for PA 4Z-75

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Page 3: ... Do not install the 4Z 75 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 4Z 75 directly above other heat producing equipment unless sufficient ventilation or forced air cooling is provided Do not install the 4Z 75 in locations without proper ventilation The 4Z 75 should no...

Page 4: ...ice for your 4Z 75 by qualified service personnel if any of the following occur 1 The power supply cord or the plug has been damaged 2 Objects or liquid have fallen or spilled into the vents 3 The 4Z 75 has been exposed to rain 4 The 4Z 75 exhibits a marked change in performance 5 The 4Z 75 has been dropped or its enclosure or chassis is damaged NOTE TO COMPLETELY DISCONNECT THE 4Z 75 FROM THE AC ...

Page 5: ... Mechanical and Environmental 3 Front Panel 4 Rear Panel 5 Inputs and Outputs 6 Installation Tips 7 Configuration and Operation 8 Performance Specifications 9 Features 10 Periodic Maintenance 11 Troubleshooting 12 Sherbourn Technologies LLC Ten Year Limited Warranty 13 Notes 14 4Z 75 Two Channel Four Zone Distribution Amplifier ...

Page 6: ...stall and configure the Sherbourn 4Z 75 Two Channel Four Zone Distribution Amplifier to achieve its optimum potential The manual also includes a brief summary of the features offered by the 4Z 75 and a short description of how the 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 S...

Page 7: ... 18 25 deep includes feet binding posts knobs no rack kit Weight 27 lbs 12 5 kg unboxed 38 lbs 17 5 kg boxed Rack mountable Yes with optional rack mount kit Power requirements 115 VAC or 230 VAC 10 50 60 Hz selectable by rear panel switch Ventilation and cooling To avoid overheating be sure to provide adequate clearance and ventilation ...

Page 8: ...e Enable Pushbuttons one for each zone Toggle the status of each zone individually On or Off 4 Zone Status LEDs one for each zone Each Zone Status LED illuminates blue the corresponding zone is enabled 5 Volume Knob Sets the output level gain for all zones The maximum gain on the Volume knob is limited by the setting of the Master Volume adjustment on the back panel 1 2 3 4 5 ON OFF 1 2 3 4 VOLUME...

Page 9: ...ne pair per channel per zone Connect speakers to these five way binding posts Each zone has connections for one pair of stereo speakers speakers for each zone are individually relay switched 6 Power Switch Switches the AC mains power to the 4Z 75 On and Off When this switch is Off the 4Z 75 will not respond to trigger signals or manual controls 7 Input Voltage Selector Switch Always ensure that th...

Page 10: ...Trigger and control Trigger Input mono 1 8 Trigger Output mono 1 8 Front panel controls and indicators On Off large push button toggles Standby mode On Off LED 1 red indicates Standby mode blue indicates normal operation flashing red indicates a fault Zone Enable 4 pushbuttons 1 through 4 individually enable each zone Zone Status LEDs 4 indicate when each zone is enabled Volume knob Rear panel con...

Page 11: ...es 2 4 Disabled The Volume control on the 4Z 75 remains at its current setting when power is cycled via either the front panel On Off button or the rear panel Power switch Ventilation and Cooling Even though the 4Z 75 is quite efficient it can still produce significant heat especially when driving low impedance loads To avoid overheating be sure to provide adequate clearance and ventilation especi...

Page 12: ...ns at or above 2 ohms 4 pairs of 8 ohm speakers two pairs of 4 ohm speakers or 2 pairs of 8 ohm speakers and one pair of four ohm speakers all satisfy this requirement Rear Panel Master Volume Control The rear panel Master Volume control located to the left of the input and output RCA connectors acts as a preset level control in addition to the front panel Volume knob This controls the level of th...

Page 13: ... per channel x2 into 4 ohms 270 watts RMS per channel x2 into 2 ohms Input sensitivity for full output 800 mV S N ratio 95 dB A weighted Frequency response 20 Hz to 20 kHz 0 02 dB at 1 watt 1 5 dB at 80 kHz Trigger and control Trigger Input 5 20 VAC or VDC Protection The 4Z 75 is protected against excessive operating temperature shorted speaker connections ground faults and other common fault cond...

Page 14: ...inputs with loop output for chaining additional amps 4 sets of individually relay controlled stereo speaker outputs Front panel master Volume control and output switching controls with status indicators Stable into low impedance loads and other difficult loads Speaker connections via full sized five way binding posts Convection cooled no fans Massive toroidal power supply Intelligent protection fr...

Page 15: ...tly with a soft rag If something sticky gets on the front panel or case of the 4Z 75 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 4Z 75 or into the vents ...

Page 16: ...enabled Press one of the Zone Enable buttons Problem No sound or distorted sound is heard from one or both channels in one or more zones the Status LED is lit blue Reason The 4Z 75 is On and is not indicating a fault Verify that BOTH the front panel Volume and rear panel Master Volume controls are both set properly and not all the way down Check your source and your input cabling Check your speake...

Page 17: ...RTICULAR PURPOSE ARE EXPRESSLY LIMITED TO THE TERM OF THIS LIMITED 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 s...

Page 18: ...Repair Department 131 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 WAIVER LIMITATION OF IMPLIED WARRANTIES TO THE EXTENT YOUR STATE HAS ENACTED A L...

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