Upgrade for Cary 306?
Yes it’s very ear opening, to have an active I/V (current to voltage) stage after the D to A converters that has no global feedback. This was further advanced by me from Pedja Rogics (of Audial fame) who first use of the AD844 a 2000 V/μs opamp. That can be used without feedback and stacked (paralleled) as well. As it’s my belief that the very HF noise and glitches that come out of a D to A converter upset I/V stages that have feedback around them, and a zero feedback I/V stage like this have no problems with it as it is unconditionally very stable, and the proof is in the sound of it, simply stunning compared to what most use, text book I/V opamp (with feedback) stages from the big d/a chip manufacturers, Burr Brown, ESS, Wolfson and Analog Devices etc etc. Cheers George |
Hi Russell, you have what can be a killer cdp in the 306/200 as it has the best starting components to maximize with already: 8 x PCM1704 R2R ladder multibit dacs ("bit perfect" Redbook conversion) PMD200 last of the HDCD chips from PMD
VAM1202 a very good laser/mech from Philips. If you know a good tech that can perform these I/V stage and buffer mods (around $300-$400) you will have Redbook (PCM) replay that would be as good even better as anything costing big bucks. http://www.diyaudio.com/forums/digital-source/227677-using-ad844-i-v-77.html#post4700627 Cheers George
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Cary Audio Design had 4 x 306 models, which was yours, then I can give more info on it, as I'm very fond of some and done some great I/V stage and buffer output mods that made them one of the best sounding Redbook cd players you can have, as they had real R2R ladder multibit dacs inside.. Cary Audio Design CD 306 Cary Audio Design CD 306/200 Cary Audio Design CD 306 SACD Cary Audio Design CD 306 SACD Pro Cheers George |
