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#378098 - 06/07/12 05:31 PM Amplifier classes
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
i just sold my Hafler 500 amp (class AB) - along with the Hafler 110 preamp - to be replaced with a QSC GX5 (class D) which makes for a total of 2 QSC amps in my HT. the GX5 is half the weight, half the height, has more power, runs very cool, is built like a tank, uses much less electricity and the sound is excellent.

the Hafler was 27 years old and running as new, but i thought it would be better to sell it before some parts would break down with no original replacement parts available, or high repair charges.
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#378099 - 06/07/12 05:46 PM Re: Amplifier classes [Re: J. B.]
SRoode Offline
connoisseur

Registered: 03/20/08
Posts: 1278
Loc: Fishers, Indiana, USA
The GX5 is a Class H amp, not a Class D amp. Class H is a modified Class AB with about 70% efficiency. Class D amps are 90+% efficient. It looks like a super amp though!
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#378120 - 06/08/12 06:36 AM Re: Amplifier classes [Re: SRoode]
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
right, class H. :-)
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#378500 - 06/13/12 01:19 PM Re: Amplifier classes [Re: J. B.]
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
the new amp (QSC GX5) was installed 2 days ago; yesterday morning i ran Audyssey calibration.
same good sound as before, and a HT room that's not quite as warm.

for those interested to have a look, just go to the address in my signature.
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#378524 - 06/13/12 04:07 PM Re: Amplifier classes [Re: J. B.]
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
My Hafler buyer wanted only the preamp, so i still have the Hafler 500 amp to sell.
For pick up only, as it weighs a lot and i'm in no shape to pack it and send it away.

For info: Gellidius at Yahoo.com

2 variable sensitivity pots on the front (like the pro model).
2 quiet fans.

Power continuous/peak:
8 Ohms: 325/405
4 Ohms: 450/800
2.5 Ohms: ???/1250


Edited by J. B. (06/13/12 04:08 PM)
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