QSC SRA 3622 Manuale Utente

1TD-000107-00 rev.A*TD-000107-00* Studio Reference AmplifierUser ManualSRASRASRA122224223622

10SETUP- Removing the Gain Control Security CoverGain Control Security CoverThe amplifier is shipped with its gain controls attheir maximum setting of

11SETUP- Installing the Gain Control Security CoverInstalling the Gain Control Security Cover1- Slide the cover into the front panel recess.Push it fu

12SETUP- Cooling RequirementsThe amplifier has a rear-mounted variable-speedfan. Speed is determined by the temperature ofthe amplifier’s internal he

13SETUP- AC Power RequirementsAC PowerVerify operating voltage before pluggingamplifier into AC mains. Make sure the ACmains voltage is the same as sp

14SETUP- Operating Mode SelectionStereo ModeMode SwitchesThe mode switches are located on the rear panel.The switches are recessed to prevent accident

15Biamp Applications- Use Stereo ModeStereo Mode Notes:•To operate in stereo mode, set switches 4,5, 6, and 7 to the left position.•Input connections:

16Parallel ModeSETUP- Operating Mode Selection: ParallelIn parallel mode, channel 1 andchannel 2 XLR inputs are connectedin parallel. Applying an inpu

17Bridge ModeIn bridge mode, both outputchannels are interconnected intoone, higher power output. Theresult is one output with about 4times the peak p

18SETUP- Clip LimiterCLIP LIMITER ON: To turn the limiter on, slide the switch to the right (Sw.1: Ch.1, Sw.10: Ch.2).CLIP LIMITER OFF: To turn the li

19SETUP- Low Frequency FilterChannel 1’s low frequency filter is operated byswitches 2 and 3. Channel 2’s filter is operatedby switches 8 and 9.FILTER

2© Copyright 2002, QSC Audio Products, Inc.QSC® is a registered trademark of QSC Audio Products, Inc.“QSC” and the QSC logo are registered with the U.

20Audio Input ConnectionsCONNECTIONS- Inputs, General InformationInput connections to the SRA can be made withbalanced XLR connectors for all operatin

21XLR Connector PinoutCONNECTIONS- Inputs: XLR and RCA Connector PinoutsRCA (phono plug) Connector PinoutBalancedUnbalancedpin 2pins 1 and 3Jumperpin

22Connecting the Outputs to the LoudspeakersThere are two basic speaker connectionconfigurations for the SRA amplifier. Stereoand parallel modes use t

23CONNECTIONS- Outputs: Binding PostsUsing the Binding PostsThe binding posts support several connection methods;banana plugs, spade lugs, or direct w

24Stereo and Parallel Mode outputconnections using binding postsDo not use less than 4-ohm loads inbridge mode! Note polarity of con-nections for bri

25CONNECTIONS- Outputs: Speakon connectorsSpeakon OutputsThe Speakon connectors offer quick, reliable connection and disconnection of the speakers.Alt

26CONNECTIONS- Outputs: Speakon connectorsStereo or Parallel ModesStereo and Parallel modesuse one cable for eachchannel. Each cable con-nects to its

27CONNECTIONS- Outputs: Speakon Biamp ApplicationBiamp OperationIn biamp, one channel is used for lows, while theother channel is used for highs. It r

28CONNECTIONS- Remote on/off (remote trigger)Remote turn-on and turn-off capability is provided by the remotetrigger jacks on the rear panel. Remote t

29CONNECTIONS- Remote on/off (remote trigger) 12 VDC Type12 Volt DC Remote TriggerFor 12 Volt DC remote triggeroperation, use a mono (2terminal) 3.5 m

3INTRODUCTIONGeneral Overview...4Illustrations...

30CONNECTIONS- Remote on/off (remote trigger) Contact Closure Type12 Volt DC Remote TriggerFor contact closure remotetrigger operation, use stereo(3 t

31CONNECTIONS- DataPortDataPort is located on the left side of the rear panel.A typical DataPort application shown with a program-mable QSC DSP-4 sig

32LED indicators.USE- Front Panel Controls and IndicatorsGain ControlsA gain control adjustment is provided for eachchannel. The voltage gain of the a

33APPLICATION EXAMPLE- 7.1 Surround7.1 Surround ApplicationThe block diagram, atright, shows how SRAamplifiers might beconnected in a 7.1home theater

34TROUBLESHOOTINGThe amplifier “cuts-out” when I really crank it up (intermittent operation)-• Make sure the AC power source is rated for the required

35TROUBLESHOOTINGI am using the amp for a subwoofer application and it sounds “rubbery”, what’s up?-• Verify that the Clip Limiters are OFF. Why? The

36SRA1222 SRA2422 SRA3622Output Power:(watts per channel, stereo/parallel mode)8 ohms, 20Hz to 20kHz, 0.03% THD 200 425 7254 ohms, 20Hz to 20kHz, 0.05

37SPECIFICATIONS- SRA SeriesSpecifications subject to change without notice!ALL MODELSVoltage gain: 28× (29 dB)Controls: Front- AC switch, Recessed Ch

38DisclaimerQSC Audio Products, Inc. is not liable for any damage to speakers, or any other equipment that is caused bynegligence or improper installa

39

4INTRODUCTION- General OverviewCongratulations on your purchase of the SRA (Studio Reference Amplifier)Series power amplifier. To helpyou obtain the

40QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA“QSC” and the QSC logo are registered with the U.S. Patent

5INTRODUCTION- IllustrationsFront Panel (gain control security cover removed)1- Power switch2- Channel 1 gain control3- Power “on” indicatorRear Panel

6The SRA amplifier is highly durable and carefully packaged. We recommend you inspect the unit carefullyafter removing it from the packaging, as occas

7Rack Mounting1- A #2 size cross point (Phillips) screwdriver.2- The rack mount ears included with you SRA amplifier.To attach the rack mounting ears,

8SETUP- Rack MountingDimensions for rack mount installations.Note: Some dimensions are taken fromthe front surface of the rack rail.Continued, from pr

9SETUP- Supporting the rear of the amplifierIf transporting the amplifier in a loaded equipment rack, support the rear of the amplifier using rearrack