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High End Red Book CD Player Opinions? - Page 9

post #121 of 251
Thread Starter 
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post #122 of 251
Quote:
Originally Posted by Welly Wu
Is there any such thing as an audiophile manufacturer who sells a non up converting or over / up sampling CD player? I am unconvinced that these red herrings improve sound quality.
*improvements* are subjective.
I am not aware of any filterless non upsampling CD players, but have heard few DACs and genearlly I do like them over the ones with upsampling capability.

I am soon trying out a DAC with both functions. It will be interesting to see what each function does.
post #123 of 251
47 Labs, AFAIK.
post #124 of 251
Quote:
Originally Posted by Sugano-san
47 Labs, AFAIK.
They have a DAC and transport.
No one box CD player, AFAIK.
post #125 of 251
Isn't the Opera Consonance CD-120 Linear a non-oversampling CD player?
post #126 of 251
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post #127 of 251
This machine http://www.memoryplayer.info/Memory%...ome%20page.htm might be of some interest here too.
post #128 of 251
Quote:
What do you guys think is the better value?
You can read stuff till a cow comes home, but ultimately, you are the only one who can determine the worth of any kit.

Without listening for yourself, it is always going to be a crapshoot.
post #129 of 251
Thread Starter 
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post #130 of 251
Quote:
Originally Posted by Welly Wu
It utilizes a fully balanced circuit topology unlike the Wadia 302.
Are you saying the Wadia is not fully balanced?
post #131 of 251
Thread Starter 
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post #132 of 251
Welly,

A differential cct. is beneficial if you are running balanced signals all the way to the speakers. Otherwise very little sonic benefit running it ( unless your interconnect cable run is long )

Is your amplifier *truely* balanced as well?
post #133 of 251
Quote:
Originally Posted by Welly Wu
Kent,

So sorry, I am writing my Cardas Golden Reference Power and Interconnect review now, but I sent a few private messages to jefemeister who used to work for Wadia and designed the software for the Wadia 302. He said that the Wadia 830, 301, and 302 use one 24bit Burr Brown 1704 D/AC for each channel and operational amplifiers to create the the normal and inverse balanced signal for cost savings. The new Wadia 581, 581i, 781, and 781i use multiple D/ACs per channel to create both the normal and inverse balanced signal at cost of a higher price. Send him a private message if you want more information.

Wadia is still great though. I love the sound of the Wadia 302 that I heard multiple times at Audio Connection, but I am not sure if up/oversampling is necessary and for well over $5,000 USD, I would prefer a true balanced circuit topology for my next reference CD player. Like my equities portfolio, I have an extremely high tolerance for risk and I buy and hold my assets over the very long term future.

Thanks. I have to return to writing my review. Tomorrow, I will be working on my MFA Poetry portfolio again. I am back to work at Barnes & Noble this Sunday.
Hi Welly, couple thoughts:

1.) I have not heard the Audio Reseach CDP. But I have owned two of their line stages in the past, and know they are a great company.

2.) This from Wadia's 830 manual -- "The Wadia 830 is a true balanced design. It generates the inverted signal in the digital domain and all subsequent processing is done in balanced mode." Beyond that, I'm glad to hear their new units will incorporate additional design improvements.

3.) I too buy and hold. Most of my 2ch gear is at least 10 years old. Once I find what I like in head-fi, my purchases will likely stabilize here too.

4.) I don't know your requirements, but to me one of Wadia's great advantages is the fact their units are designed to act as a line stage (i.e. preamp). This fact has allowed me to use my Wadia to replace my Audio Research LS-3 (line stage), and to drive HD 650s balanced directly from the Wadia. Less units to buy. Less cables to buy. Better sound. Not a bad deal.

Again, I have not heard the Audio Research unit. So best of luck with your decision.
post #134 of 251
The 830 is "fully balanced"--it runs 2 DACs per channel. One handling the positive phase and one doing the negative (which is created digitally in the FPGA). Each DAC feeds it's own pin of the XLR connector. The RCA is derived by a comparison of the two DAC phases which is cool because (in the math anyway) it doubles the signal-to-noise ratio on the RCAs.

The 301/302 is not quite the same--it uses one DAC per channel and then the negative phase is derived in the analog output stage. So the XLR is fed by the original signal and the derived. The RCA is direct from the DACs.
post #135 of 251
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