I kept them to the suggested 30ma. Same w/ the new transistors. I should probably order some heatsinks and try cranking it up a bit but I'm pretty happy with it right now. One thing I did notice and read about is the varying voltages and how the h/s help minimize this.

I just wanted to post a thank you to those involved in creating this great amp. I recently built one from one of Jeff Rossell's handy little kits. It took about four evenings after work to get it up and running. I've only built a cmoy previous to this so I'm sure those with more experience could...

Another one you might consider is the Xytronic 379. I love mine and the new tip cleaner is awesome. http://www.howardelectronics.com/xytronic/379.html

Journey (the orig line-up) 3x Neil Young Kansas Peter Frampton Pat Benatar Henry Paul Band Michael Stanley Band (local) Rush 4x Donnie Iris (local) Bob Seger Peter Frampton Kenny Loggins Bad English Black Crowes Dave Matthews Foreigner Southside Johnny and the Asbury Jukes...

I used the default values from Tangent's list. 220uf electrolytic for c1, 0.1uF for c2, and the 2132 op-amp. I set it for a gain of 5. I suppose I could play around with different size caps and op-amps but I really would like to build an amp that's going to give me the full potential of the...

I recently built a cmoy to go along with my new senn 580's. I knew it wasn't going to be anything phenominal but I figured it would be a good project to get back into electronics. I've done some little projects around the house but it's been 20 + yrs. doing anything like this. The build went...

6 sounds like the safe bet. Thanks

Quote: Originally Posted by F107plus5 Oh oh; you may be in trouble now. It may be too late already. You're getting HD580? I have very similar HD600. You've enjoyed the sound of Grados? I enjoy the sound of Grados. The damage may already be done. This is an evil place. If you...

While waiting for my Senn 580's to arrive, I built a cmoy following Tangent's excellent instructions. (Works great btw, thanks Tangent!) I would like to know what gain is recomended for the 580's and is their anything else I could do to the amp to make it more 580 specific? (Does that make...

I just sent back the SR225's and ordered a set of senn 580's for $170. While the 225's do have a glorious sound, I just couldn't get past the discomfort. I even tried different pads and still couldn't listen for more than an hour. They also seemed to be on the bright side. I'm not trying to...

I ordered a set of senn 580's (refurbished) on ebay over a week ago. Kept an eye on the ups tracking and it wasn't showing any movement so I emailed the company and asked if they had indeed shipped or if there was a problem? A day later I received a reply just saying there was a delay in...

Thanks for the input guys. Coming from the soundcard is ok but just doesn't have the guts that these grado's seem to like. Well, I guess the search is on then, only problem I foresee now is an amp that gets along with the 225's and the 580's. Anyone know of one that might fit the bill? I'd like...

Hey everyone, first post so let me say what a great site you have here! Been browsing here for the past 3 weeks since I started looking for a good set of headphones. I purchased a set of Grado 225's and oh what I've been missing! I've also got a set of Senn 580's (refurbished) coming next week...