quiet & powerful pro amps - AVS Forum
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post #1 of 16 Old 05-21-2013, 07:03 AM - Thread Starter
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I'm looking for a powerful pro audio amp - new or used that is dead silent. I don't care if it has fans, I just don't want them on unless the amp gets hot. The only pro amps I can find that have fans that do this and/or don't have fans are the Yamaha P series and the older Crown K series amps.

I'm looking for something that has at least 1500 watts in 4ohms bridged or 750 per channel at 2ohms for my 18" AVA right now... Not interested in any amps that require fan mods!
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post #2 of 16 Old 05-21-2013, 09:50 AM
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Don't get an iTech then nor an XLS 5000. Those are definately not quite amps, and run loud-ish most of the time. biggrin.gif

Here is one option:

1750 watts into 4, with no fans. It has 1000sq inches of cooling fins to make that work, and weighs 100lbs... and isn't cheap, and makes lots of heat (50% efficient).

http://shop.emotiva.com/collections/amplifiers/products/xpr1

The B&O ICE 1000w modules are an alternative, which are ~90% efficient, no fans, but even more expensive and you'll need two of them.
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post #3 of 16 Old 05-21-2013, 10:05 AM
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Yamaha P7000S The fans never turns on and it is dead silent. smile.gif



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post #4 of 16 Old 05-21-2013, 10:30 AM
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I agree, the Yamahas, Emotiva hifi, or SpeakerPower's rackmount offerings. As far as the SpeakerPower, I'd contact Brian and inquire exactly regarding fan noise. All depends on your budget, the SP appear very, very nice IMO.

You may find this interesting.

------------------------------------
Flat, Deep, Clean, Linear, and Loud
------------------------------------
Active 16.8kw, 7.3 system
(3)Seaton Cat12C up front, (4)QSC K8 sides/rears
(2)Seaton SubM-HP, (4)18" IB
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post #5 of 16 Old 05-21-2013, 01:32 PM - Thread Starter
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Thanks for all the suggestions, I like the blog!

It looks like the Yamaha P5000S is the best bang for the buck silent power amp. I have an SMS-1, would this have any problems with the Yamaha's signal input? Also, I've heard these have limited output down below 20hz, is this measured anywhere? I'm sure it would blow the socks off of the PE 1000 watt plate amp I have right now...
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post #6 of 16 Old 05-21-2013, 01:39 PM
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How about the Crown XLS 1500. I have a 1000 and have yet to hear the fans.

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post #7 of 16 Old 05-21-2013, 01:53 PM - Thread Starter
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Quote:
Originally Posted by Louquid View Post

How about the Crown XLS 1500. I have a 1000 and have yet to hear the fans.

So the fan setup is similar to the Yamaha - only turning on if the amp reaches a certain level?
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post #8 of 16 Old 05-21-2013, 01:54 PM
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QSC DCA series
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post #9 of 16 Old 05-21-2013, 01:57 PM
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Quote:
Originally Posted by realtight View Post

So the fan setup is similar to the Yamaha - only turning on if the amp reaches a certain level?

Yes, and when the fans are on, I have yet to EVER hear them. Even with your ear up to the amp you can't tell they are on. I would suggest at least starting at the xls1500 as it steps up the internals to slightly stronger components over the 1000. I have an xls1500 and love it.

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post #10 of 16 Old 05-21-2013, 01:59 PM
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Quote:
Originally Posted by realtight View Post

So the fan setup is similar to the Yamaha - only turning on if the amp reaches a certain level?

I believe so. I've run my amp near clipping for minutes at a time before. Quickly muting the sound I still can't hear the fans running. They're pretty quiet.

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post #11 of 16 Old 05-21-2013, 02:43 PM - Thread Starter
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Quote:
Originally Posted by zora View Post

QSC DCA series

I see these have variable speed fans... does that mean they are always on jut at lower rpm depending on heat?

I'm looking for no fan noise - not low fan noise. I must be sensitive because I've tested many low db fans in my htpc and could always hear all the 90mm and below sized fans.
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post #12 of 16 Old 05-21-2013, 04:47 PM
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The XTI's are also variable speed and run quite or are dead silent at lower power levels, but not at 1700watts.
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post #13 of 16 Old 05-21-2013, 07:34 PM
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Quote:
Originally Posted by realtight View Post

Quote:
Originally Posted by zora View Post

QSC DCA series

I see these have variable speed fans... does that mean they are always on jut at lower rpm depending on heat?

I'm looking for no fan noise - not low fan noise. I must be sensitive because I've tested many low db fans in my htpc and could always hear all the 90mm and below sized fans.

I've got the big boy DCA3422 and the fan is very quiet. If you want no fan noise, then you will not be happy with any pro amp (except the old K1 & K2 amps that have no fans).
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post #14 of 16 Old 05-24-2013, 02:55 PM
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http://classdaudio.com/audio-amplifiers/sds-470c-custom-class-d-amplifier.html

I bought the kit for this amp for 500 without the case, 600W RMS @ 4 Ohms, No fans so it's dead silent, low power draw, and over 90% efficient. Using it with my dual 18's, and it works great.

 
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post #15 of 16 Old 05-24-2013, 07:14 PM
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Quote:
Originally Posted by realtight View Post

I see these have variable speed fans... does that mean they are always on jut at lower rpm depending on heat?

I'm looking for no fan noise - not low fan noise. I must be sensitive because I've tested many low db fans in my htpc and could always hear all the 90mm and below sized fans.

The amp is mounted to the side of your head, or you have a big amp to play it at a whisper level?

At any level needing a big amp, and levels far less, that fan noise will be masked by the program..

I use four QSC PLX series with fan mod and can't hear the fans from more than a foot or two away at ambient background noise levels. Even playing the TV only at background levels completely obliterates any possibility of hearing the fans.

Just because there is a knob doesn't mean you should turn it.
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post #16 of 16 Old 05-25-2013, 09:37 PM - Thread Starter
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Quote:
Originally Posted by whoaru99 View Post

The amp is mounted to the side of your head, or you have a big amp to play it at a whisper level?

At any level needing a big amp, and levels far less, that fan noise will be masked by the program..

I use four QSC PLX series with fan mod and can't hear the fans from more than a foot or two away at ambient background noise levels. Even playing the TV only at background levels completely obliterates any possibility of hearing the fans.

Congratulations on not being able to hear your fans. Some people have good ears and can easily hear small fans. I highly doubt the fans you used were the same quality low DB fans I have in my htpc.
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