What DCPs do you know that haven't got an aliasing filter?

210 · 19th January 2011, 07:17 PM

Are there any more CDPs like the Philips CD723
that haven't got an output filter ?

stephensank · 20th January 2011, 02:57 AM

There were at least a couple of Denon mid-line players in the 1988-90 area that had PCM61P dacs w/8x OS, which sent the voltage output of each dac chip directly to the output jacks, via unneccessary dc blocking caps. I believe one model like this was the DCM-444 changer.

210 · 20th January 2011, 03:44 PM

Thanks stephensank!
Aliasing of 8x OS can probably well removed
by using a Jensen DM2-2RR transformer.
Using transformers as output filters avoids ic's and
does also have the advantage of splitting ground
and symmetrical use.

19th January 2011, 07:17 PM	#1
210 diyAudio Member Join Date: Dec 2010 Location: Here	What DCPs do you know that haven't got an aliasing filter? Are there any more CDPs like the Philips CD723 that haven't got an output filter ?

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20th January 2011, 02:57 AM	#2
stephensank diyAudio Member Join Date: Oct 2006	There were at least a couple of Denon mid-line players in the 1988-90 area that had PCM61P dacs w/8x OS, which sent the voltage output of each dac chip directly to the output jacks, via unneccessary dc blocking caps. I believe one model like this was the DCM-444 changer.

20th January 2011, 03:44 PM	#3
210 diyAudio Member Join Date: Dec 2010 Location: Here	Thanks stephensank! Aliasing of 8x OS can probably well removed by using a Jensen DM2-2RR transformer. Using transformers as output filters avoids ic's and does also have the advantage of splitting ground and symmetrical use.

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