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Old 26th July 2013, 03:12 AM   #1
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Default Please help me pick a preamp

I have 2 qsc 1400 amps running bridged into Bose 901 series 1.

I need a preamp to get more juice out of the amps, I have read amps like this do not respond well with home audio preamps.

Can someone please guide me int he right direction?

I heard NAD had one that pit out 15 volts

Last edited by HIFI4LIFE; 26th July 2013 at 03:22 AM.
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Old 26th July 2013, 12:01 PM   #2
amptech is offline amptech  Scotland
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A simple mixer will do the job as these have stage gain and top channel gain as well, just remember also try not to drive your amps in to clipping...there are many mixers to choose for your given needs even citronic/pioneer will do. If you know what to do and have a pre-amp it's straight forwards to tweak the op-amp gains via changing resistors to boost level but only if you know how..
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Old 26th July 2013, 12:06 PM   #3
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Power amps have a limit of how much a given signal should be.. look up your amps spec.. most amps are .775mv to 1.5 volts going over can strain things...
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Old 26th July 2013, 08:25 PM   #4
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So do you think I could use one of those cheap little tube preamps from ebay?
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Old 26th July 2013, 08:29 PM   #5
amptech is offline amptech  Scotland
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Default pre-amp help..

Quote:
Originally Posted by HIFI4LIFE View Post
So do you think I could use one of those cheap little tube preamps from ebay?
forget tube pre-amp, use a 4 channel mixer there's plenty to pick on line

Last edited by amptech; 26th July 2013 at 08:40 PM.
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Old 26th July 2013, 08:29 PM   #6
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Quote:
Originally Posted by HIFI4LIFE View Post
I have read amps like this do not respond well with home audio preamps.

What utter CRAP. How can anyone say that that their product will not work with home pre-amp.
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Old 26th July 2013, 08:34 PM   #7
amptech is offline amptech  Scotland
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If your amps are rated for a given power say 1000w per side they will not give more than that as in bridge mode it would be 2000w no more...if you need more power get bigger amp.
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Old 26th July 2013, 08:38 PM   #8
amptech is offline amptech  Scotland
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Quote:
Originally Posted by KatieandDad View Post
What utter CRAP. How can anyone say that that their product will not work with home pre-amp.
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Old 26th July 2013, 08:48 PM   #9
amptech is offline amptech  Scotland
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Frequency Response 20 Hz - 25 kHz
Number Of Channels 2
Tech Details
Audio SNR 100 dB
RMS Power per channel at 2 ohms 550 Watt
RMS Power per channel at 8 ohms 200 Watt
RMS Power per channel at 4 ohms 400 Watt


8 Ohm Bridge mono

THD (Total Harmonic Distortion)



600 Watt

0.1 %
just found this on line.. them qsc's are 800 mono bridge use... so good pre-amps will drive with ease...
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Old 26th July 2013, 09:06 PM   #10
ODougbo is offline ODougbo  United States
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I wouldn't mind a 2.1 Pre Amp - if they make such a thing.
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