I have had the older 555 paired with the 750 preamp for many years in my vinyl only system. I recently bought a full-tube preamp for another system and used it with the 555 for a few days and it really rounded out the rough edges, especially when played at higher volumes. There's another thread where someone is asking for tube preamp recommendations and should give you some good ideas. Lots of options out there, new or used.
Recommended Preamp for pairing an Adcom 555II Amp and Theil CS 3.5 speakers
My Bryston 0.5B preamp was inadvertently put down over the holidays by an incident now known as 'The Sippy Cup Mystery'. Regardless of the cause, I need a new preamp for my system. I am driving a pair of Thiel
CS
3.5 (with the electronic bass equalizer) speakers with an Adcom GFA-555II amp. The majority of the eclectic music (classical, 80s, folk, funk) being played on the system is streamed from iTunes through my Audioengine B1 DAC. I have read a number of posts with various recommendations for the GFA-555II or the Thiel CS 3.5s but not for their paring. Short of winning the lottery this week, cost is a factor. Any suggestions or directions would be very much appreciated.
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I have used the GFA 555 with the GFP 565 and while the pair is very good sounding (and the 565 has a great phono section if your into vinyl). But, I will say that when I installed the Modwright SWL 9.0 SE ($1000 used) it really showed me how beautiful sounding the Adcom 555 can be. A tubed pre amp is what I highly recommend. Manley labs shrimp?? possibly. Doge 8 Clarity, Dehavilland Ultraverve III, these are all tube based and around your price range and are very special indeed. Also, all of these will have very low output impedance to drive the Adcom no problem. Matt M |
iowanna33 Your Audio Engine B1 has Analog Output: 2V Max. Analog Output Impedance: 57 Ohms. And your Adcom 555II as was pointed out has: 100kohm input impdance only needs 1.75v in for full 200w output As you can see the 2v from your B1 is more than enough to run the 555 to full output, so you don’t need an active preamp with gain that you don't need. Also the output impedance of the B1 is 57ohms and this is a great match for a passive preamp, which will aslo match prefectly with the 555’s 100kohm input impedance. Get one of these and save a fortune, you’ll have the most transparent/dynamic sound and save a fortune on not needing a fancy/expensive preamp that will colour the sound in comparison. $49 http://www.schiit.com/products/sys passive only $349 http://www.schiit.com/products/saga if you want to switch from passive to tube output as well . $699 http://www.schiit.com/products/freya if to want to switch from passive to solid state or tube output. In all three I think with your setup the passive will win out, so for $49 go the first one. Cheers George |
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