Guest David H Posted April 8, 2010 Share Posted April 8, 2010 My current project is modifiying my spare DCX-2496. I am removing the ouput gain stages and rather than replacing it with a capacitive or transformer type output section, I am replacing it with a 12AU7 tube type output section shown here. This is a single tube gain stage available from Decware. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 8, 2010 Share Posted April 8, 2010 Here is a pic of the assembed gain stages. There is barely enough room to install in the chassis. The power supply willl be in a remote chassis. I ended up not using the Film and Foil Dayton caps, due to space considerations, I installed the originals that came in the kit on the bottom side of the board. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 8, 2010 Share Posted April 8, 2010 I also changed the output connectors to RCA. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 8, 2010 Share Posted April 8, 2010 So far the modified output stage seems to be working perfectly. I have not not had a chance to scope the unit, but is sounds good, and I am pleased with the performance so far. Quote Link to comment Share on other sites More sharing options...
Deang Posted April 9, 2010 Share Posted April 9, 2010 I know trying to describe sound is pretty much a waste of time, but could you make an attempt. Nice job btw! Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 9, 2010 Share Posted April 9, 2010 I know trying to describe sound is pretty much a waste of time, but could you make an attempt. Nice job btw! Thanks Dean, so far I have not had enough time to do any serious listening, and not yet rolled any tubes. I am pleased that I have no noise issues.Adding the gain stage was needed because I did not have enough gain to drive my Decware SE-84c amps with the capacitive output mod, and I had never seen a tube output done on a Behringer. Currently I have a set of CONN 12AU7 tubes driving the output, the CONN have a rolled top end great midrange detail and solid bass. After I scope the unit, I will change the output tubes to Bugle Boy and do some serious listening. Dave. Quote Link to comment Share on other sites More sharing options...
mark1101 Posted April 9, 2010 Share Posted April 9, 2010 Very cool, nice job. Quote Link to comment Share on other sites More sharing options...
JL Sargent Posted April 9, 2010 Share Posted April 9, 2010 Yeah, I'm with Mark, that's really cool. Not too many of those sitting around. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 10, 2010 Share Posted April 10, 2010 Thanks Guys. I think this may be one of a kind. I will post the results after I scope it this monday or tuesday. Dave. Quote Link to comment Share on other sites More sharing options...
Pete H Posted April 10, 2010 Share Posted April 10, 2010 Looks great as usual. This little hobby of yours is getting pretty involved, any plans on making this a full time deal?[Y] Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 10, 2010 Share Posted April 10, 2010 Looks great as usual. ThanksThis little hobby of yours is getting pretty involved, any plans on making this a full time deal? No, it's just for fun.Dave. Quote Link to comment Share on other sites More sharing options...
Pete H Posted April 10, 2010 Share Posted April 10, 2010 No, it's just for fun. Dave. It wasn't fun for me when I came in from the shop last night at 11:45 and was hammered on by the GF about why it took so long to just cut a few holes wood. [8-)] Quote Link to comment Share on other sites More sharing options...
Rudy81 Posted April 10, 2010 Share Posted April 10, 2010 It wasn't fun for me when I came in from the shop last night at 11:45 and was hammered on by the GF about why it took so long to just cut a few holes wood. Well, it's not going to get better from here on out. Ratro! Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 12, 2010 Share Posted April 12, 2010 Got some testing done on the Tubed Behringer, and all is well. No noise issues and great response 10hz to 20khz+ This Decware gain stage works perfectly. Yellow is input, red is output. All channels tested and perform Identical. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 12, 2010 Share Posted April 12, 2010 50hz saw Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 12, 2010 Share Posted April 12, 2010 20k sine Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 12, 2010 Share Posted April 12, 2010 5K saw Quote Link to comment Share on other sites More sharing options...
hklinker Posted April 12, 2010 Share Posted April 12, 2010 Very cool! Herb Quote Link to comment Share on other sites More sharing options...
Guest David H Posted April 12, 2010 Share Posted April 12, 2010 I know trying to describe sound is pretty much a waste of time, but could you make an attempt. Nice job btw! I finally got the Behringer installed in my main system the sound is excellent, I could not be more pleased. Imaging is signifigantly improved the overall sound quality is much smoother. The improvements may be contributed a better impedence match between the Decware amps and the now Decware output section in the active crossover, then again the improvements may be psycological. I love tubes. More pics to come. Dave. Quote Link to comment Share on other sites More sharing options...
Pete H Posted April 12, 2010 Share Posted April 12, 2010 then again the improvements may be psycological. I love tubes.and what's wrong with that? In the end, your enjoyment is all that matters. Heck, I don't even understand exactly what you're doing, but I think the tubes sticking out look cool.[Y] Quote Link to comment Share on other sites More sharing options...
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