Parasound A 31 Manual de usuario

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A31ThreeChannelPowerAmplifier

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SurroundSoundFlexibilitywithAward‐WinningPerformance

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TheA31wasdesignedinresponsetoincreasingdemandforathreechannelpowerampthatholds

nothingbackinpowerorperformance.TheA31isidenticalinperformanceandsoundtotheaward‐

winningHaloA51.HereareafewofthemanyapplicationsfortheA31:

1) Topowerthefrontthreechannelsofahometheater.Thesurroundorbackchannelscanthenbe

poweredbyasmaller2chParasoundpowerampsuchastheHaloA23.Thisgivesthegreatest

powertothefrontchannelswhereitisneededthemost.

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2) Topowerthecenterchannelandtwosurroundchannels.ThisallowstheLeftandRightfront

speakerstobepoweredbyadedicatedtwochannelpowerampsuchastheHaloA21,orbetter

yet,twoJC1monoblocks.Thisisidealforthemusicloverwhoisunwillingtocompromisestereo

reproduction.

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3) TopowerthefrontthreechannelsinanAVreceiver‐basedsystem.Theremainingsurroundand

backchannelscanbedrivenbythereceiver.Thisassuresyouthebestsoundforthefrontchannels

whileenablingtheAVRtoproducemorepowerforthesurroundandbackchannels.

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HoweveryouemploytheA31,youwillbedelightedbyitsimpeccablesonics,strikingauthorityand

faithfulreproductionofthesmallestdetails.

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Input Sensitivity for 28.28 V Output into 8 Ω

Unbalanced: 1 V

Balanced: 1 V per leg

S/N Ratio

> 112 dB, input shorted, IHF A-weighted

> 102 dB, input shorted, unweighted

Damping Factor: > 1100 at 20 Hz

Dimensions

Width: 17 1⁄2" (445 mm)

Panel height: 7" (178 mm)

Height with feet: 7 5⁄8" (194 mm)

Depth: 19 1/8" (485 mm)

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Net Weight: 65 lbs (29.5 kg)

Shipping Weight: 79 lbs (35.9 kg)

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Power Requirement

Standby: < 1 Watt

Maximum: 1500 Watts

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Features

‐Gaincanbeadjustedupto6dBaboveTHX®gain

‐HighbiasclassA/ABoperation

‐CircuitrydesignedbylegendaryJohnCurl

‐Directcoupled(nocapacitorsorinductorsinthesignalpath)

‐ComplementaryJFETinputstage,MOSFETdriverstage&bipolaroutputstage

‐UnbalancedRCAandbalancedXLRinputs(maybemixed)

‐THXUltra2®certified

‐Autoturn‐onby12vtriggeroraudiosignal

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Specifications

Power Output - All Channels Driven

250 watts RMS x 3, 20 Hz - 20 kHz, 8Ω

400 watts RMS x 3, 20 Hz - 20 kHz, 4Ω

Current Capacity: 60 amperes peak per ch.

Slew Rate: > 130 volts per microsecond

Frequency Response

5Hz -100 kHz, +0/-3 dB at 1 watt

Total Harmonic Distortion

< 0.2 % at full power

< 0.03 % at typical listening levels

IM Distortion: < 0.04 %

TIM: Unmeasurable

Dynamic Headroom: > 1.5 dB

Interchannel Crosstalk

> 78 dB at 1 kHz

> 63 dB at 20 kHz

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Parasound Products, Inc., 2250 McKinnon Ave., San Francisco, CA 94124 / 415 397-7100

Formorephotos,features,specificationsandproductmanuals,visitusatwww.parasound.com

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