who makes very low output impedance dac/cd player?

soulsheiksan · 3rd January 2007, 08:09 PM

looking for somewhere in the 50 to 100 ohms(max), as i would like to try a transformer coupled volume control, if there is a assembled kit /unit even better , tubes would be lovely too
have searched a lot of sites etc but nobody mentions this
thanks in advance

lm317t · 3rd January 2007, 08:29 PM

If you really wanna do it that way use an autoformer. Transformers and autoformers degrade audio a little bit and can saturate at low frequencies if you're not careful, but I guess you already know that.

lousymusician · 4th January 2007, 02:18 AM

Accoding to this review, Scott Nixon's Tube DAC has an output impedance of 100 ohms. Available in assembled or kit form.

roender · 4th January 2007, 02:03 PM

Zout: 30ohm
Rockna DAC RD2
http://www.audiokit.ro/dac_rd2.html

Zoran · 6th January 2007, 09:06 AM

Wadia specs as 65ohm,
16 paralleled TDA1543 dacs with simple IV resistor < 65ohm,
every OP iv modified like driving high capacitive loads see Analog device and Linear technology papers...
As well as step down interstage transformers...
cheers...

soulsheiksan · 8th January 2007, 03:10 PM

thanks for the info the rockna looks intresting ,has any one tried their non os converter, ? i clearly would like nos i have had wadia products before it just seemed more processed in sound than i like, over the weekend i checked ack new dac which states very low imp,
i do have the 1.2 version and its over 100 ohms so it must have a different i/v stage, does any one know?
i have had the scot nixon, but the inverted phase thing is a challange when you use 6 to 8 amps in my triamped diy ref system
a while back i did a transformer output after reading stefano perguini dac mod board in glass audio with lundal transformers, if you think that transformers degrade and saturate the low freq, you have to lister to this set up the most life kile bass ever
cheers

3rd January 2007, 08:09 PM	#1
soulsheiksan diyAudio Member Join Date: Apr 2005 Location: NYC	who makes very low output impedance dac/cd player? looking for somewhere in the 50 to 100 ohms(max), as i would like to try a transformer coupled volume control, if there is a assembled kit /unit even better , tubes would be lovely too have searched a lot of sites etc but nobody mentions this thanks in advance

6th January 2007, 09:06 AM	#5
Zoran diyAudio Member Join Date: Jan 2004 Location: Belgrade	Wadia specs as 65ohm, 16 paralleled TDA1543 dacs with simple IV resistor < 65ohm, every OP iv modified like driving high capacitive loads see Analog device and Linear technology papers... As well as step down interstage transformers... cheers... __________________ ###

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3rd January 2007, 08:29 PM	#2
lm317t diyAudio Member Join Date: Dec 2006	If you really wanna do it that way use an autoformer. Transformers and autoformers degrade audio a little bit and can saturate at low frequencies if you're not careful, but I guess you already know that.

4th January 2007, 02:18 AM	#3
lousymusician diyAudio Member Join Date: Nov 2005 Location: NorCal	Accoding to this review, Scott Nixon's Tube DAC has an output impedance of 100 ohms. Available in assembled or kit form.

4th January 2007, 02:03 PM	#4
roender diyAudio Member Join Date: Sep 2006	Zout: 30ohm Rockna DAC RD2 http://www.audiokit.ro/dac_rd2.html

8th January 2007, 03:10 PM	#6
soulsheiksan diyAudio Member Join Date: Apr 2005 Location: NYC	thanks for the info the rockna looks intresting ,has any one tried their non os converter, ? i clearly would like nos i have had wadia products before it just seemed more processed in sound than i like, over the weekend i checked ack new dac which states very low imp, i do have the 1.2 version and its over 100 ohms so it must have a different i/v stage, does any one know? i have had the scot nixon, but the inverted phase thing is a challange when you use 6 to 8 amps in my triamped diy ref system a while back i did a transformer output after reading stefano perguini dac mod board in glass audio with lundal transformers, if you think that transformers degrade and saturate the low freq, you have to lister to this set up the most life kile bass ever cheers

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