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Old 3rd March 2004, 03:34 AM   #1
difi is offline difi  United States
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Default Lowest noise levels

How are the noise (not distortion) levels of GC's compared to the best non-GC amps?

I've got a high-sensitivity system (104dB/1W) w/active xovers and, although it'd be nice to simplify my amp stack w/some GC's, the absolute lowest noise floor is my ultimate goal.
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Old 3rd March 2004, 08:56 AM   #2
Nuuk is offline Nuuk  United Kingdom
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With the proviso that they must be built propely (which applies to all audio circuits) I would say that the noise floor will be no higher than, and probably lower than other types of amplifier.

I have 95 db sensitivity speakers in open baffles and can hear absolutely nothing even with my ear just inches from the cone.

As you say, the Gainclones and active speakers were just made for each other!
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Old 3rd March 2004, 10:16 PM   #3
mikelm is online now mikelm  England
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Quote:
Originally posted by Nuuk
With the proviso that they must be built propely (which applies to all audio circuits) I would say that the noise floor will be no higher than, and probably lower than other types of amplifier.

I have 95 db sensitivity speakers in open baffles and can hear absolutely nothing even with my ear just inches from the cone.

As you say, the Gainclones and active speakers were just made for each other!
That's strange...

my gainclones gave audible hiss with my ear next to the tweeter.

my JLH simple class A is completely silent.

mike

P.S. Nick, thanks for your reply to me earlier as you can see I finally made it...
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Old 3rd March 2004, 10:42 PM   #4
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Regarding noise, I believe that is one area that discrete circuitry holds the edge. For example, Erno Borbely's Super Buffer operates about 260nV 20-30khz and the new ultra-low noise AD8671 will (I believe) operate at >300nV 20-30khz. Super Buffer uses 2sk170/2sj74 (0.95nV/hz sqrt) and the AD8671 (2.8nV/hz sqrt).


JF
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