powdermnky007 Posted October 12, 2004 Share Posted October 12, 2004 Just got in my decware 685. http://www.decware.com/SACD/sacd.htm It's stock outputs are 2v, which sound fine. It's high quality outputs are 3.5v which distort. book says 'this is a high impedance output meaning you don't want to use passive volume controls unless they are 100k ohms' my preamp is a mapletree ultra 4a that nosValves modded. I've been over the wire diagrams, which don't mean much to me. I saw 100k ohms on there somewhere it seems. Is 3.5v input to the mapletree too much? The tube that it came with is a 'JJ Electronic' E88CC tube. It uses a dual triode (12AU7) and may be rolled with 12AT7 and 12AX7 tubes as well. Not sure what an AT7 is, but I know AU7 has lower gain than an AX7, so i need to stay way from the AX! I'm not sure what an E88CC is... maybe they dropped the wrong tube in the box. THANKS! Quote Link to comment Share on other sites More sharing options...
powdermnky007 Posted October 13, 2004 Author Share Posted October 13, 2004 Talked to the steve at decware. I told him the line input specs for my mapletree ultra. He said that the cd player voltage / impedence shouldn't be a problem. He's sending me a 12AU7. I'll let you know how it works and tell you guys how it does once I get it burned in. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted October 13, 2004 Share Posted October 13, 2004 Glad to hear that Decware will take care of you on that. I've been very curious about that unit. Hope you'll post your take on it when it's running right. Should sound fabulous. Quote Link to comment Share on other sites More sharing options...
powdermnky007 Posted October 13, 2004 Author Share Posted October 13, 2004 hope I can get it working right!. Sure I'll let everyone know how it stacks up. Not that I have a big base of comparison besides my old sony 5 disc Anyone here know about the difference between an E88CC and 12AU7 tube? Quote Link to comment Share on other sites More sharing options...
seti Posted October 13, 2004 Share Posted October 13, 2004 I was looking at the decware cdp as well but it is a toss up between the decware tube cdp and the Ah! Joeb 4000 w/upsmapler. I have been leaning toward the Ah! just because so many people on this forum hold it in high regard. Quote Link to comment Share on other sites More sharing options...
powdermnky007 Posted October 13, 2004 Author Share Posted October 13, 2004 if only someone lived close to me, we could both order them... use the trial periods to compare! (I live in louisiana, Hint, hint) Quote Link to comment Share on other sites More sharing options...
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