One or two separate transformers?

smartx21 · 12:55 PM

I know this issue must have been discussed to its maximum, and I ask anyone that may guide me through this forum in order to find the answer for this question:

What is the difference/what are the advantages of using separate transformers for a two-channel amp, or even a single transformer with two separate windings, in comparison with a single, one-winding unit (that could even feed dual separate supplies, starting in the bridge)?

So, there are many possibilities, and I would like to acquire more info about each one.
Thanks for all inputs, or links to previous threads about this matter.

bob91343 · 4th February 2011, 04:45 PM

If properly designed, there is no difference except weight, efficiency, cost, stuff like that.

Ian Finch · 5th February 2011, 12:24 AM

Quote:

Originally Posted by bob91343

If properly designed, there is no difference.....

Agreed, however some feel reassured that crosstalk will be me best and
therefore stereo qualities will be better with separate PSUs.

The term "properly designed" certainly applies to crosstalk between any
stereo paired amplifiers and also to concerns about bass reproduction.

Bonsai · 5th February 2011, 08:18 AM

I think has it correct on this issue. A well designed amp will avoid cross talk due to common impedance or inductive cross coupling. In terms of dealing with PSU ripple arising from cross modulation between the channels modulation, this is entirely a matter around the inherent PSSR of the amplifiers.

revoli · 5th February 2011, 08:28 AM

Good question and one I would like to know more about from our illustrious and knowledgeable members... (having just blindly gone down this dual transformer route on latest project)

4th February 2011, 12:54 PM	#1
smartx21 diyAudio Member Join Date: Mar 2010 Location: Santiago, RS/ Brasil	One or two separate transformers? I know this issue must have been discussed to its maximum, and I ask anyone that may guide me through this forum in order to find the answer for this question: What is the difference/what are the advantages of using separate transformers for a two-channel amp, or even a single transformer with two separate windings, in comparison with a single, one-winding unit (that could even feed dual separate supplies, starting in the bridge)? So, there are many possibilities, and I would like to acquire more info about each one. Thanks for all inputs, or links to previous threads about this matter. __________________ We should not dwell on what we do not have, but, instead, be grateful for what we do have! Last edited by smartx21; 4th February 2011 at 12:55 PM. Reason: ...

5th February 2011, 08:18 AM	#4
Bonsai diyAudio Member Join Date: Aug 2006 Location: Taipei, Taiwan	I think has it correct on this issue. A well designed amp will avoid cross talk due to common impedance or inductive cross coupling. In terms of dealing with PSU ripple arising from cross modulation between the channels modulation, this is entirely a matter around the inherent PSSR of the amplifiers. __________________ bonsai http://www.hifisonix.com/

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4th February 2011, 04:45 PM	#2
bob91343 diyAudio Member Join Date: Mar 2010	If properly designed, there is no difference except weight, efficiency, cost, stuff like that.

5th February 2011, 08:28 AM	#5
revoli diyAudio Member Join Date: Nov 2010 Location: Wiltshire UK	Good question and one I would like to know more about from our illustrious and knowledgeable members... (having just blindly gone down this dual transformer route on latest project)

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