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-   -   Ground referenced Power Amplifiers (https://www.audioaficionado.org/showthread.php?t=22601)

AudioGremlin 08-20-2013 05:03 AM

Ground referenced Power Amplifiers
 
Looking for a 2 channel ground referenced amplifier with muscle! (Not bridged with negative speaker terminal referenced to earth). So far these are ground referenced:
Classe CA-M300 & CA2300, Bryston 4Bsst2, 2B, 3B, 6B, 9B
Chord, all of them I think a ground referenced.
Any suggestions from you guys (& Gals) would be mightily appreciated.

tdelahanty 08-20-2013 05:55 AM

I think your terminology is confused. A bridged or fully balanced amp's negative terminal is floating, not referenced to (earth) ground. A single-ended or differential (design) amp's output is referenced to earth ground (black output term.) I have not looked at the amps (schematic) you mentioned and do not know their design.

AudioGremlin 08-20-2013 06:51 AM

A balanced amplifiers output is centred about ground i.e. the positive & negative speaker terminals vary above and below ground respectively. Often manufacturers publish warnings in their manuals to never ground either speaker terminal.
I'm specifically looking for amplifiers where the negative speaker terminal is grounded.

AudioGremlin 08-20-2013 06:59 AM

Perhaps I should have worded it clearer, yes single ended, not balanced or bridged designs. Specifically ground referenced at the output.

Rayooo 08-20-2013 08:10 AM

Quote:

Originally Posted by AudioGremlin (Post 523166)
Perhaps I should have worded it clearer, yes single ended, not balanced or bridged designs. Specifically ground referenced at the output.

Parasound JC-1 is...but don't trust me, I have a schematic if you'd like to independently verify, not something you want to "assume".

AudioGremlin 08-20-2013 08:35 AM

Thanks rayooo, would need to be absolutely sure. Do you have a scanned copy of the schematic to hand?

Rayooo 08-20-2013 09:04 AM

Quote:

Originally Posted by AudioGremlin (Post 523180)
Thanks rayooo, would need to be absolutely sure. Do you have a scanned copy of the schematic to hand?

yup, have PDF copy, relatively small file size should be OK for email.
Send me a PM if you like and I'll get them to you.

Rayooo 08-20-2013 09:20 AM

If I'm not mistaken, some of the Bryston amps are singled ended output also, although the 28B appears to be push-pull output so maybe I'm wrong about this.

I like Bryston for many reasons, not the least of which they publish schematics on their web site, for an electronics hacker like me, that gives them brownie points right out of the gate. :yes: :D

I really really need to think about a couple big Bryston amps, but now I'm way way off the subject. :nono:

Joe Appierto 08-20-2013 09:20 AM

I think you need to be a subscriber in order to send a PM.

Rayooo 08-20-2013 09:21 AM

Quote:

Originally Posted by Joe Appierto (Post 523189)
I think you need to be a subscriber in order to send a PM.

Oh right, whoops....


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