DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 38 - diyAudio
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Old 21st July 2011, 01:54 PM   #371
Reality first!
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I don't agree and I would do the opposite...

Magnetic fields radiation is more harmful with low level signals, like in this case, than with power amplifiers, IMHO.

On commercial equipment as a matter of fact you can find R-Cores on CD players, DACs and Preamps.

Power amps with R-Cores are a rarity...

An additional note:

Usually toroids have a less 'full' sound than EI or R-Cores so I wouldn't use a toroid with this DAC...
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Last edited by ClaveFremen; 21st July 2011 at 01:57 PM.
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Old 21st July 2011, 02:17 PM   #372
Tenson is offline Tenson  United Kingdom
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In my tests a few posts ago I used a Nuvotum toroid for the single rail supply, and a Block (those blue PCB ones) 15-0-15V. Obviously, it works fine.
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Old 21st July 2011, 02:21 PM   #373
erin is offline erin  Australia
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Quote:
Originally Posted by ClaveFremen View Post
I don't agree and I would do the opposite...
You are most welcome to disagree, I stand by what I wrote earlier.
I will elaborate on this by saying that although this kit is very good for the money. I as an owner of this kit don't think the type of transformer used will make any audible difference on this kit. Anyone who was worried about EMI from the E core transformer could put a shield between it and the board if they were that worried about it. Which I don't think anyone should be worried about it anyway.

Last edited by erin; 21st July 2011 at 02:27 PM.
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Old 21st July 2011, 02:35 PM   #374
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Quote:
Originally Posted by erin View Post
You are most welcome to disagree, I stand by what I wrote earlier.
...
I as an owner of this kit don't think the type of transformer used will make any audible difference on this kit.
It's a free world, almost...

BTW any single thing from the IEC inlet to output RCA could make an audible difference...
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Old 21st July 2011, 03:01 PM   #375
erin is offline erin  Australia
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Quote:
Originally Posted by ClaveFremen View Post
BTW any single thing from the IEC inlet to output RCA could make an audible difference...
Yes I agree with that, but how far to go on a $30 kit? The R core costs more than the kit itself.
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Old 21st July 2011, 03:22 PM   #376
johnm is offline johnm  United Kingdom
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How could the IEC inlet possibly make a difference, unless extremely badly corroded?!

I have to say I haven't heard any ill effects from using a toroidal transformer with my Gigaworks DAC. If toroidal is good enough for Naim (and their equipment is often praised as far as having robust PSUs are concerned) it's good enough for me I think - as in all areas of Hi-Fi - there are good and bad examples of any/all technology. Toroidal doesn't have to mean bad, nor does SMPS etc etc.
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Old 21st July 2011, 03:36 PM   #377
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Default Fundamentalism

Careful guys.... we are in danger of fundamentalism here.. or an outbreak of rationality

Personally, I think that differences in the area of transformer type, assuming properly installed and specified, should be negligible. I note the use of toroidals in Krell, Linn and other high-end equipment, so issues about toroids cannot be general. We do need some specifics here.. preferably measurable. Swapping transformer types should be one of the simpler A-B tests as it disturbs very little of the signal-path components. Any takers?
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Old 21st July 2011, 03:50 PM   #378
Trebla is offline Trebla  United Kingdom
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I'm using one of each type of transformer.
Tried swapping them around but there's no benefit that i can hear.
I think two is better than one though.
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Old 21st July 2011, 03:56 PM   #379
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Default Two better than one?

Quote:
Originally Posted by Trebla View Post
I'm using one of each type of transformer.
Tried swapping them around but there's no benefit that i can hear.
I think two is better than one though.
Surely that is going to be down to each transformer being underspecified? Using two allows better delivery. This probably explains why DIYers traditionally over engineer power supplies.. it will do no harm, may actually help, and is relatively straightforward. In the absence of sophisticated test equipment it may even be prudent.
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Old 21st July 2011, 08:41 PM   #380
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What is a good shield between the tranny and the board? An aluminium plate cross the enclosure? or any better idea?
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