Hi,
Sometime ago I got a Teac ZD700 CDP which uses one PCM53 for both channels. Seems to be 2 x os. Not very sophisticated design...
Sounds very good and I think it beats anything else I have.
Darker sound compared to other players but highs not missing. Darker means less mids and less lower highs. Not crying like modern DACs.
Very fine highs, strong bass, voices and instruments got body.
Absolutely clean spectrum without any adjustment. Both two tested chips. Never seen that before on any other DAC.
Datasheet states 16 bit monotonocity...
Will post pictures in DAC measurements thread.
Sometime ago I got a Teac ZD700 CDP which uses one PCM53 for both channels. Seems to be 2 x os. Not very sophisticated design...
Sounds very good and I think it beats anything else I have.
Darker sound compared to other players but highs not missing. Darker means less mids and less lower highs. Not crying like modern DACs.
Very fine highs, strong bass, voices and instruments got body.
Absolutely clean spectrum without any adjustment. Both two tested chips. Never seen that before on any other DAC.
Datasheet states 16 bit monotonocity...
Will post pictures in DAC measurements thread.
Bernhard said:
I have a very old Telefunken CDP with one PCM56 for both channels.
Bernhard said:
I wouldn't say so but mine sounds quite good too.
I changed all the 1uf leaking electrolythics (old Panasonics
), it was this player's only problem, it didn't read CDs at all, and somebody gave it to me for "recycling". I've changed the op-amps for OPA2132 on the analog stage.
Proper PSU bypassing on the op-amps was done, of course.
It has 4 double op-amps, a high-order analog filter.
There are plenty of (good) styroflex caps around.
Oh, I also removed the muting transistors.
The sound is very "analog" indeed.
It has very good bass "slam" and dynamics, and the bass is surprisingly TIGHT, beats too many modern players in this respect.
It seems to be 2x OS, the digital filter is a Sony.
Transport is a plasticky, clanky Sony too.
It even has a digital output.
Red led display, no remote.
Very retro.
This is PCM53.
Two generations before PCM56. Parallel data input.
When using one DAC for both channels there is a very little phase shift between left and right which could be noticeable.
But with one DAC for each channel, each channels signal passes a different sounding DAC.
Mono becomes pseudo stereo. Soundstage looses focus.
PCM56 is monotonic for 15 bits only.
Two generations before PCM56. Parallel data input.
When using one DAC for both channels there is a very little phase shift between left and right which could be noticeable.
But with one DAC for each channel, each channels signal passes a different sounding DAC.
Mono becomes pseudo stereo. Soundstage looses focus.
PCM56 is monotonic for 15 bits only.
Bernhard said:
You mean the PCM53 is better than the PCM56?
Or is it just better in case of this implementation (single dac)?
Btw, I don't know exactly what year is my Telefunken made, but it looks certainly some years older than my Philips CD650.
I would say it's really a first generation CDP (1983~4)?
The PCM56 already existed but some brands still used the PCM53. Maby it was cheaper.
Your player probably got pots for distortion adjustment, little yellow ones close to the chips.
In this player there are three pots that adjust noise, never seen that before.
Noise floor of this player is a little worse up to 7 kHz, but this is from implementation I guess.
IMHO for me this chip got some benefits over PCM56 and others:
Spectrum is perfectly clean. Better than PCM63.
PCM56 and other chips distortion adjustment is not temperature stable, and it only gets perfect results on about 30% of chips.
PCM53 probably doesn`t need it. Just tested two chips.
Parallel data input allows inverting specific bits very easy.
Second chip per channel for adding inverted output ?
And it is industry standard compatible, there are industry instrumentation DACs that are pin compatible.
Always dreamed of a DAC that got ceramic DAC chips with gold plated pins
I post a picture later...
In this player there are three pots that adjust noise, never seen that before.
Noise floor of this player is a little worse up to 7 kHz, but this is from implementation I guess.
IMHO for me this chip got some benefits over PCM56 and others:
Spectrum is perfectly clean. Better than PCM63.
PCM56 and other chips distortion adjustment is not temperature stable, and it only gets perfect results on about 30% of chips.
PCM53 probably doesn`t need it. Just tested two chips.
Parallel data input allows inverting specific bits very easy.
Second chip per channel for adding inverted output ?
And it is industry standard compatible, there are industry instrumentation DACs that are pin compatible.
Always dreamed of a DAC that got ceramic DAC chips with gold plated pins
I post a picture later...
Hallo ,
Just resumed an old board of a Denon DCD (630?) from end '80 .
By your experience , have I a chance of putting to work a pair of PCM 56P and a digital filter NPC sm5818ap ( 8X ) soon after a CS8412 receiver ?
Or can the PCM 56P work also in non os mode...
In the board the Sony CXD1125 is supposed to be the receiver/processor .(...?)
Just resumed an old board of a Denon DCD (630?) from end '80 .
By your experience , have I a chance of putting to work a pair of PCM 56P and a digital filter NPC sm5818ap ( 8X ) soon after a CS8412 receiver ?
Or can the PCM 56P work also in non os mode...
In the board the Sony CXD1125 is supposed to be the receiver/processor .(...?)
Bernhard said:
Oh man, you are Master Scavenger!
Bernhard said:You could buy it and if you do not like it, remove the pcb and send to me, I send you 2 x TDA1541A no crown
Doh, I have some of those, enough for me.
Bernhard said:Now negotiate
After dinner I thought to myself: Carlos, don't you have enough CD players?
stefanobilliani said:
No datasheet for SM5818. SM5813 datasheet is available.
Non os should be possible.
Just listened to a JVC XLV1100, 2xPCM54-K, sounds horrible and measures the same.
Here is the pic of my instrumentation DAC.
It works, but gives a very little non ! harmonic distortion, not as good as PCM53, same with PCM52, also cerdip package.
The DAC section of this player is painted with some kind of juice, maybe C37.
No datasheet for SM5818. SM5813 datasheet is available.
Non os should be possible.
Just listened to a JVC XLV1100, 2xPCM54-K, sounds horrible and measures the same.
Here is the pic of my instrumentation DAC.
It works, but gives a very little non ! harmonic distortion, not as good as PCM53, same with PCM52, also cerdip package.
The DAC section of this player is painted with some kind of juice, maybe C37.
Hi Bernhard,
I recentlt got hold of the DAC71. Please share what would be best fit for this little gem.
Thank you
Vancao
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