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Old 02-12-2004, 07:52 PM   #7 of 11
Chas_T
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Join Date: Jun 2002
Local Time: 02:48 PM
Local Date: 11-23-2008
Posts: 765

Hey Mike,

I am using balanced connections between the amp/ssp. However, I don't think the Sherbourn is a true balanced amp.

I wrote this mail to Sherbourn on or about 2/3/03 about the 7/2100 being balanced and this is Mr. Tang's response.

Quote:
Dear Charles:

By definition a "Full" balanced amp truly consists of two identical amps from the input to output.

We called our 7/2100 "comes with Balanced Input," which is of course not a "Full Balanced" amp, but it'll sum balance input signal and provide good common mode rejection to some system noise.

In the real world, it is my opinion that the differential outputs of a full balanced amp will eventually get summed together at the speaker load anyway. It is a matter of where you sum the differential signals together, and in our case we do it at the power amplifier input. Why?

Because we feel you gain very little to drive a pair of speaker leads, which carry large signal, in a balanced fashion. A power amp with well designed balanced input in fact may give you better noise performance because every amp has one time of its internal noise contribution to a system and a full balanced amp contribute, technically speaking, a square root of two times noise output noise.

Another concern we have is for a HT amp, the heat is always something every engineer needs to deal with when designing it. I believe, with our amp design we outperform many others in delivering higher power/volume ratio, we are a lot better in terms of power efficiency is concerned if you compared our amp with a full balanced amp.

Best Regards,

E. Tang
Sherbourn

I did not have any problems connecting the cables, but as much as I tried to be organized, it's a bit of an pragmatic mess.

Also Mike, I do not use a trigger. I am a manual kind of guy.

Charles
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