Question about Using Low DCR Power Xfrmrs in amp circuits

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I've both read and heard references to using power transformers with low DCR in audio circuits . I have two questions about that .

1) Can anyone tell me why it would make any difference ?
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2) Does anyone have experience with this and does it really make a big difference in the sound ?
I ask because it seems to me that if you go for low DCR it means getting a unit that will be designed to supply a greater current and that will mean that voltages will run higher .
Recently I bought a 12.6V fil transformer spec'd for a max . of 2.5 Amps . Running it with four tubes drawing a total 1.2A netted a voltage of 13.6 , down only 0.2V from the spec'd 13.8 no load V .
It seems to me that trying to use a big honker on a B+ power supply might be unpredictable , forcing fine tuning with voltage lowering resistors and that's just a waste of power + bad design. Are there any really accurate ways of working this out beforehand ? ( oops, I guess that's three questions. )
Thanks

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Topic - Question about Using Low DCR Power Xfrmrs in amp circuits - Ian L. 16:23:57 10/12/02 (7)

butt in w/another question - Sector-7G 18:41:56 10/26/02 (1)

No downside. - gdahl 21:15:30 10/27/02 (0)

Thanks for the answers guys , 't helps . (nt) - Ian L. 22:37:54 10/18/02 (0)

Re: Question about Using Low DCR Power Xfrmrs in amp circuits - gdahl 15:12:28 10/17/02 (0)

Re: Question about Using Low DCR Power Xfrmrs in amp circuits - MQracing 21:53:07 10/16/02 (1)

Re: Question about Using Low DCR Power Xfrmrs in amp circuits - KevinC 03:33:24 10/17/02 (0)

Re: Question about Using Low DCR Power Xfrmrs in amp circuits - kevinc 05:21:49 10/13/02 (0)

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