[DreamKing]

I see, well a 2 dB change would still be transparent though. So no audible difference in DR still. I wonder if anyone's ever compared them on one of those upgradable DAC's. For the time being, I'm just gonna assume it's up to the DAC and not the chip (between these two chips at least).

 

[Sapientiam]

Current measurements don't give much, if any guide to transparency. Otherwise the ODAC and O2 would be the last word in fidelity.

 

[prot]

Current measurements don't give much, if any guide to transparency. Otherwise the ODAC and O2 would be the last word in fidelity.

Yes they do. And yes they are (one of the..).
The Odac even carries the amazing "purrin approved" stamp for the faint of heart.

 

[DreamKing]

  Current measurements don't give much, if any guide to transparency. Otherwise the ODAC and O2 would be the last word in fidelity.

 
In any case, the PCM1704 would still have more DR than the PCM63 if you subtracted the A-weighting average. So unless you've directly compared the chips, these measurements aren't conclusive to its transparency, if anything else from what you're saying. So a bit confused why you started off by mentioning low level linearity.

 

[Articnoise]

Have a Monarchy 22B on the way. Had a similar question about the PCM63 versus the PCM1704. Is the 63 a better sounding DAC chip, Mr. Poon said he would send me 1704s if I wanted to upgrade to 24 bits from the current 20. Good or bad idea?

Edit: Plenty of info on the 22B, but none on the upgrade (is it one?).

 

I would ask Mr. Poon which he prefer in this specific DAC and what the SQ pros and cons are. The DAC chip not only has to be good, it really has to synergy well with the filters (they work together) and also the rest of the design.

 

Regarding PCM63 versus the PCM1704, not everybody share the view of MM. AYON CD-5, NAIM CD555, Aqua Audio La Scala, Mark Levinson 30.6, Trinity DAC are some well regarding DACs that use the PCM1704 and of cause an equally list of good DACs can be made for the PCM63. 

 

[Sapientiam]

So a bit confused why you started off by mentioning low level linearity.

Answering the question you posed - 'in what way is the 1704 a downgrade?' (relative to the '63).

 

[Sapientiam]

Yes they do.

 
Cite?

 

[thegunner100]

   
Hi,
 
Interesting. Seems really conclusive. On what dac with socketed chips did you compare them and in what ways is the 1704 a downgrade?

I had the parasound d/ac-1100, which could have been "upgraded" to the pcm1704. But based on my experience with the M7, I did not go for it. The parasound with a cheap usb/spdif converter already sounded better than the M7 to my ears.
 
But YMMV. Maybe you'll like the thicker, more syrupy sound of the 1704. 

 

[purrin]

"PCM1704 bass", softness, and lack of resolution despite more bits. Lots of people like that kind of sound though.

 

[Wildcatsare1]

^Thanks Gents, I am going to stick with the BB PCM63s, the Monarchy 22B should be here Tuesday.

Appreciate the advice, looking forward to lighting it up!

 

[Jones Bob]

Apparently, you can swap the PCM63 for the PCM1704 in the Monarchy 22B some way. 
http://www.head-fi.org/t/693798/thoughts-on-a-bunch-of-dacs-and-why-delta-sigma-kinda-sucks-just-to-get-you-to-think-about-stuff/5850#post_11688338

Kludge.

Not only are the physical parameters not interchangeable, neither are the signal parameters. The digital filter needs to be reprogrammed/replaced to be optimized to either 20 or 24 bit, as does the analog anti imaging filter.

 

[Wildcatsare1]

Kludge.

Not only are the physical parameters not interchangeable, neither are the signal parameters. The digital filter needs to be reprogrammed/replaced to be optimized to either 20 or 24 bit, as does the analog anti imaging filter.

Kludge is correct, Monarchy sells an adapter in the chip replacement and it remains at 20 bits. So I am not going to make the change, very happy I decided not to buy the other unit for sale that had been "upgraded".

 

[lukeap69]

Kludge is correct, Monarchy sells an adapter in the chip replacement and it remains at 20 bits. So I am not going to make the change, very happy I decided not to buy the other unit for sale that had been "upgraded".

Why did you chose 22B over the NM24?

 

[Wildcatsare1]

Why did you chose 22B over the NM24?

Why did you chose 22B over the NM24?

I found an M22B at a really good price, so I wanted to give it a shot. Would love to compare them head to head.

 

[lukeap69]

I found an M22B at a really good price, so I wanted to give it a shot. Would love to compare them head to head.

Nice. Let us know your impressions.