QSC SRA 1222 Скачать руководство пользователя страница 37

37

SPECIFICATIONS- 

SRA Series

Specifications subject to change without notice!

ALL MODELS

Voltage gain:

28× (29 dB)

Controls:

Front-

AC switch, Recessed Ch. 1 and Ch. 2 gain knobs

Rear-

DIP switch (Ch. 1: clip limiter on/off, LF filter on/off,
LF filter freq select—20 or 50 Hz; Ch. 2: clip limiter on/off, LF filter on/off,
LF filter freq select—20 or 50 Hz; inputs parallel or stereo; bridge mode)

Connectors:

Input-

gold-plated RCA, 3-pin XLR (1 each per channel)

Output-

Neutrik Speakon (1 per channel) and safety-shrouded binding posts

Remote-

two 3.5 mm jacks in parallel (12V or switch remote on/off trigger)

DataPort-

HD-15 for QSC DSP accessory

Input impedance:

XLR-

10k ohms unbalanced, 20k ohms balanced

RCA-

10k ohms unbalanced

Indicators:

Clip-

red LED (1 per channel)

Signal (-30 dB)-

green LED (1 per channel)

Power-

green LED

Cooling:

ultra-quiet variable-speed fan, rear-to-front air flow

Amplifier Protection:

Full short circuit, open circuit, thermal, ultrasonic, and RF
protection. Stable into reactive or mismatched loads.

Load protection:

on/off muting, DC-fault power supply shutdown

Dimensions:

Width-

483 mm (19.0”) with rack mount ears installed
445 mm (17.5”) without rack mount ears

Height-

89 mm (3.5”) 2 rack units

Depth-

394 mm (15.5”) overall
381 mm (15.0”) from front of rack rail to  tip of rear support chassis tab

Weight:

10 kg (22 lb.) net

Available Finish:

black chassis with black front panel/inserts or black chassis with silver front panel/inserts

Содержание SRA 1222

Страница 1: ...1 TD 000107 00 rev A TD 000107 00 Studio Reference Amplifier User Manual SRA SRA SRA 1222 2422 3622...

Страница 2: ...ized or grounding type plug A polarized plug has two blades with one blade wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong is pr...

Страница 3: ...g Mode Selection 14 Clip Limiters 18 Low Frequency Filters 19 CONNECTIONS Inputs General Use and Recommendations 20 XLR and RCA Connector Pinouts 21 Outputs General Use and Recommendations 22 Binding...

Страница 4: ...l transformer driven models while also occupying less rack space This patented technology delivers crystal clear highs smooth and accurate mids and a powerful articulate low end response providing rea...

Страница 5: ...on pinout reference chart 11 Channel 2 Speakon output connector 12 Channel 1 binding post output connectors 13 Channel 2 binding post output connectors 14 Cooling air intake vents 15 Remote trigger in...

Страница 6: ...2 used for rack mount installation only four adhesive feet for non rack mounting installation 5 64 hex key Allen wrench for gain control security cover removal remote on off trigger control cable 36 l...

Страница 7: ...The amplifier fits a 483 mm 19 width equipment rack To rack mount the amplifier 1 Install the rack mount ears see below and the following page for details 2 Position the amplifier in the equipment rac...

Страница 8: ...ross point screwdriver Phillips 2 Place the rack mount ear as shown aligning it so the screws will go back into their original locations 3 Insert the screws and tighten being sure to keep the rack mou...

Страница 9: ...r ears using a post and the notch to support the rear Method 2 The post is installed on the rear ears then the ears attached to the rack using screws The amplifier is then installed from the front of...

Страница 10: ...vent unintentional changes Removing the Security Cover 1 Using a 5 64 or 2 mm hex key remove the cover s retaining screw and set it aside 2 Insert the end of the hex key tool into the cover s screw ho...

Страница 11: ...rop into the slot in the front panel 2 While lightly pressing the right side of the cover against the chassis use the hex key tool inserted into the plate s screw hole to slide the cover to the left u...

Страница 12: ...sink assembly Cooling air enters the rear of the amplifier and exhausts from the front vents If mounting in an enclosure be certain not to restrict airflow Do not obstruct cooling air vents Cooling A...

Страница 13: ...ier AC Power Connection 120 Volt Models 15 Amp Receptacle Insert the plug fully 240 Volt Models European three conductor Earthing Receptacle Insert the plug fully The serial number plate is affixed to...

Страница 14: ...p limiting and low frequency filtering are switchable on each channel Page 18 and 19 describes the clip limiter and LF filter operation In stereo mode each input signal is sent to its respective chann...

Страница 15: ...Switch settings are the same as for stereo mode see top of page Audio inputs to amp must be preprocessed Input connections connect one input to CH1 and the other to CH2 Use the XLR or RCA connectors S...

Страница 16: ...4 5 and 6 to the right and switch 7 to the left Connect the single input signal to either CH1 or CH2 s XLR input connectors Output connections binding posts or Speakon connectors connect CH1 and CH2 o...

Страница 17: ...utput connections SETUP Operating Mode Selection Bridge Bridge Mode Notes To operate in bridge mode set switches 4 5 6 to the left and switch 7 to the right position Input Use CH1 s XLR input connecto...

Страница 18: ...rates CH1 s clip limiter and switch 10 operates CH2 s clip limiter Clip Limiting Tips Clip limiting reduces extreme overdrive peaks allowing a higher average signal level without audible distortion In...

Страница 19: ...frequencies below the speaker s limits The speaker s documentation will specify the low frequency limit Generally match the frequency selection to your speaker s low frequency capability This improves...

Страница 20: ...ec tors for best results circuitry inserts a small impedance between the RCA connector s ground and the chassis ground If the mode switches are set for parallel mode the XLR input connectors are direc...

Страница 21: ...and RCA Connector Pinouts RCA phono plug Connector Pinout Balanced Unbalanced pin 2 pins 1 and 3 Jumper pin 2 pin 1 pin 3 Signal Ground Daisy Chain Example parallel mode only All amplifiers being dais...

Страница 22: ...sizes like 16 and up the conductors to be stranded The higher the strand count the more flexible and long lived the cable will be This means less stress on the output connectors of your amplifier and...

Страница 23: ...2 inch of insulation from the ends and neatly twist any loose strands Loosen the retaining nut fully insert the wire and tighten Do not overtighten Maximum wire gauge is 10 AWG 2 58 mm diameter WARNIN...

Страница 24: ...r positive to the red or positive terminal of each loudspeaker Connect each black binding post or negative to the black or negative terminal of each loudspeaker All amplifiers and loudspeakers must ma...

Страница 25: ...ications use four conductor cable Four conductor cable may be used for carrying both of the output channels with a single cable Signal splitting required at loudspeaker end of cable Use two conductor...

Страница 26: ...ode Bridge Mode Speakon connection uses CH1 s Speakon only Pin 1 is the positive signal and Pin 2 is the negative signal NOTE Make sure the speaker end is wired according to its specifications The dia...

Страница 27: ...or biamp opera tion have different power points for each channel Because high frequency drivers are much more efficient than are low frequency drivers less power is required at higher frequencies Biam...

Страница 28: ...ch If a mono plug is inserted into either jack the amplifier will go into standby mode off Apply 12 Volts DC to the tip and ground or negative to the sleeve and the amplifier will be enabled on Be sur...

Страница 29: ...y system controller Another possible remote on off solution is shown to the right This solution uses a 12 Volt DC signal and a switch wired to the mono mini plug Make sure any AC adapter used is DC vo...

Страница 30: ...on off solution is shown to the right This solution uses a switch wired to the stereo mini plug The switch could be replaced with a set of relay contacts should your applica tion require it Note We re...

Страница 31: ...r and studio applications DSP can be very useful for tuning the response of the system For example a QSC DSP 4 module con nected to the amplifier could be configured as a crossover or a subwoofer filt...

Страница 32: ...t triggering the thermal shutdown circuitry If fully illuminated the amplifier is in thermal shut down or short circuit cutback is engaged Reduce the input signal strength if the Clip LED turns off th...

Страница 33: ...inding posts or the Speakon connectors Each application installa tion is different refer to you professional audio installer for detailed application solutions Note Loudspeaker orientaion is for ilust...

Страница 34: ...try another input cable Connect the source to another channel or amplifier and verify that it is working properly Connect a known good signal source to the amplifier to verify the amplifier is workin...

Страница 35: ...ced connections where possible for the entire signal chain The design of the amplifier eliminates internal hum fields but external transformers or other magnetic devices may cause hum Move cabling and...

Страница 36: ...pical 20 Hz to 20 kHz 10 dB below rated power 0 02 0 02 0 02 1 kHz and below at full rated power 0 01 0 01 0 01 Input Sensitivity 1 43V 2 12V 2 71V for rated power into 8 ohm load Input Sensitivity 1...

Страница 37: ...SC DSP accessory Input impedance XLR 10k ohms unbalanced 20k ohms balanced RCA 10k ohms unbalanced Indicators Clip red LED 1 per channel Signal 30 dB green LED 1 per channel Power green LED Cooling ul...

Страница 38: ...nty gives you specific legal rights This limited warranty is freely transferable during the term of the warranty period Customer may have additional rights which vary from state to state In the event...

Страница 39: ...39...

Страница 40: ...40 QSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa California 92626 USA QSC and the QSC logo are registered with the U S Patent and Trademark Office 2002 QSC Audio Products Inc...

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