Pass D-1 D to A

Mark A. Gulbrandsen · 29th December 2002, 03:36 PM

Has anyone on this forum built the Pass D-1? Looks like a very unique piece...........How come its out of production?
Mark

grataku · 29th December 2002, 07:57 PM

Mark
A little multiple choice for you

A. couldn't sell any
B. too many processors come out in too little time be able to stay up to date
C. too complex to build efficiently
D. all of the above

OliverD · 29th December 2002, 08:10 PM

Probably not a reason for Pass Labs to discontinue the product, but soon or later a problem for building clones:

The PCM63 is out of production.

It was regarded as one of the best sounding DAC chips ever and although it features "only" a 20 bit resolution, it can still be found in some newer state-of-the-art DVD- and CD-players.

There are many ways out. I suggest having a look at David Broadhurst's DAC featuring PCM1704 or, if you like your circuit simple, some of the NOS designs with the old Philips TDA15xx DACs.

You can always use the Pass Labs I/V converter / output stage as long as your DAC has a current output.

Mark A. Gulbrandsen · 29th December 2002, 09:58 PM

Thanks for the suggestions guys. I was not aware that the D to A chips had been discontinued. Bet that ruined Waynes day.....
Will look into the others as suggested. I do want to use the unique output stage though...that is pretty cool.
Mark

SvErD · 30th December 2002, 12:23 AM

Where can I find the diagram for the D1?

Mark A. Gulbrandsen · 30th December 2002, 12:51 AM

At this web address from the Pass Labs web site.
http://www.passlabs.com/pdf/d1-srv-man.pdf
Enjoy, its quite unique
Mark

cyclotronguy · 30th December 2002, 05:57 PM

The last batch of parts for the D1 came from a broker, and took forever to get. That alone made the D1 more trouble than it was worth.

Nelson does not wish to make a product that we cannot support. So, we took the few remaining parts and put them on the shelf.

Kent
Pass Labs

Mark A. Gulbrandsen · 31st December 2002, 12:39 AM

Kent,
Anything new on the DAC horizon at at Pass Labs? Just curious...and I may go ahead and build it if I can locate enough of the PCM63's.
Mark

cyclotronguy · 31st December 2002, 03:29 PM

Difficult to project, the future is.

Kent

apassgear · 31st December 2002, 05:25 PM

The good thing I see with this output stage is that one can eliminate the preamp alltogether and use the provided vol control.

But i would need some changes to connect it to the voltage bit streem DAC's.

Any ideas?

29th December 2002, 03:36 PM	#1
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	Pass D-1 D to A Has anyone on this forum built the Pass D-1? Looks like a very unique piece...........How come its out of production? Mark

30th December 2002, 12:23 AM	#5
SvErD diyAudio Member Join Date: Jan 2002 Location: Norway	Where can I find the diagram for the D1? __________________ I don't suffer from insanity, I enjoy every minute of it!

30th December 2002, 05:57 PM	#7
cyclotronguy diyAudio Member Join Date: Sep 2001 Location: Northern California	D1 The last batch of parts for the D1 came from a broker, and took forever to get. That alone made the D1 more trouble than it was worth. Nelson does not wish to make a product that we cannot support. So, we took the few remaining parts and put them on the shelf. Kent Pass Labs

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29th December 2002, 07:57 PM	#2
grataku diyAudio Member Join Date: Dec 2000 Location: -	Mark A little multiple choice for you A. couldn't sell any B. too many processors come out in too little time be able to stay up to date C. too complex to build efficiently D. all of the above

29th December 2002, 08:10 PM	#3
OliverD diyAudio Member Join Date: Nov 2002 Location: Germany	Probably not a reason for Pass Labs to discontinue the product, but soon or later a problem for building clones: The PCM63 is out of production. It was regarded as one of the best sounding DAC chips ever and although it features "only" a 20 bit resolution, it can still be found in some newer state-of-the-art DVD- and CD-players. There are many ways out. I suggest having a look at David Broadhurst's DAC featuring PCM1704 or, if you like your circuit simple, some of the NOS designs with the old Philips TDA15xx DACs. You can always use the Pass Labs I/V converter / output stage as long as your DAC has a current output.

29th December 2002, 09:58 PM	#4
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	Thanks for the suggestions guys. I was not aware that the D to A chips had been discontinued. Bet that ruined Waynes day..... Will look into the others as suggested. I do want to use the unique output stage though...that is pretty cool. Mark

30th December 2002, 12:51 AM	#6
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	At this web address from the Pass Labs web site. http://www.passlabs.com/pdf/d1-srv-man.pdf Enjoy, its quite unique Mark

31st December 2002, 12:39 AM	#8
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	Kent, Anything new on the DAC horizon at at Pass Labs? Just curious...and I may go ahead and build it if I can locate enough of the PCM63's. Mark

31st December 2002, 03:29 PM	#9
cyclotronguy diyAudio Member Join Date: Sep 2001 Location: Northern California	Difficult to project, the future is. Kent

31st December 2002, 05:25 PM	#10
apassgear diyAudio Member Join Date: Nov 2002 Location: Viña del Mar, Torreon	The good thing I see with this output stage is that one can eliminate the preamp alltogether and use the provided vol control. But i would need some changes to connect it to the voltage bit streem DAC's. Any ideas?

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