Lowest noise levels

difi · 3rd March 2004, 03:34 AM

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.

Nuuk · 3rd March 2004, 08:56 AM

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!

mikelm · 3rd March 2004, 10:16 PM

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...

johnferrier · 3rd March 2004, 10:42 PM

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

3rd March 2004, 03:34 AM	#1
difi diyAudio Member Join Date: Feb 2004 Location: Michigan	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.

3rd March 2004, 08:56 AM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	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! __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

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3rd March 2004, 10:42 PM	#4
johnferrier diyAudio Member Join Date: Sep 2003 Location: WA	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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