Ooops, forgot about that - it sounds great! It cleans up the sound a lot. The bass is a lot faster, and the highs sound clearer too. I haven't noticed any distortion in the signal, all the way up to the maximum volume level. I'm really pleased with it

Hey everyone, So after building myself a typical CMoy for my headphones, I decided to see how far I could push the CMoy technology. I had noticed that my small 9v amp was able to power bookshelf speakers reasonably well, so... I built a 30v CMoy. The circuit is pretty much the same except...

Quote: Originally Posted by Paavola I wonder how this could affect the dc offset... If the other battery drains faster you only get uneven supply voltage, other supply rail is lower voltage than other. With adequate headroom in supply voltages this should not be a problem. If the other...

I don't DC offset shouldn't be much of a problem in a CMoy circuit as long as you have the high-pass filter installed - film capacitor in series with the input source and then a grounded resistor connected between the cap and the noninverting opamp input.

AFAIK, if you're using two batteries already, then you don't need those 4.7Kohm resistors to divide the voltage; just use the node between your two batteries as the virtual ground. Also, I used two index cards as insulation between the board and the casing... works pretty well and more sturdy...

Also, the ideal way to set up your volume when using the CMoy (if your CMoy has a volume control, or even just a level switch) is to have your source volume maximized as much as possible (or at least close) and adjust the CMoy volume control to attenuate the output to the level you want. This...

Nice!! I'll have to give this a try. By the way, what did you use to get your custom PCB and what parameters did you use? I tried ordering my own PCB but I'm completely lost about what kind to order.

Quote: Originally Posted by arspy87 As far as using two batteries, I think all you need to do is wire them so that the virtual ground is between the two batteries (so they're basically wired in series but with the ground in the middle). Forgot something - I think you get rid of...

Quote: Originally Posted by mminutel man, that is sweet. I am just now getting started on mine, the parts arent here yet. I am going to get the board tomorrow and the can. I am glad you posted this because I was wondering if an altoids can would work. Looks like it works like a charm. I...

Hey guys, Just figured I'd post pics of my first amp, it's only a CMoy but I had a great time making it, and it sounds surprisingly really great! I'm using my laptop as a source and either Grado SR225s or AKG K240s. I was surprised how much the bass response has improved, and also how it...

OK an update... I rewired the circuit and now I'm getting a constant very loud static from the output whenever the battery is connected.

Hey everyone, I've been trying to build a cmoy amp for the past couple of days, with some difficulty... I'm suspecting it's the op amp causing the problems (I'm getting no signal, or a very low garbled signal), so I was wondering if anyone here has built a cmoy with an LM386N(-1) op amp and...

Side note... I wonder if anyone has tried the GS-1000s with bowl pads. That would be interesting....

I just got mine a few days ago and I'm loving them... congrats on the purchase

Just got them in the mail this morning I'm loving them right out of the box, First thing I'm noticing is more refined treble and deeper bass, which I like Looking forward to hearing how they are after I listen for a while... /me sits in front of computer listening to music for hours.......

I feel better now So I hear much more praise for the 225 than the 125 - anyone own both and have any opinions on the sound improvement? I thought the 125 was noticeably better than the 80 so we'll see how much better the 225 is... so excited This is a sickness. Must...spend...more...money...

Looks like I've fallen for it again - I started with SR80s, moved on to SR125s a year later, and now another year later I just ordered SR225s. Should arrive in a few days, can't wait

It's been a while since I've had the chance to keep up with everything here (incredibly busy at school...), but with the arrival of summer I finally had a chance to pick up some K240S's at Guitar Center yesterday I love them... my primary can has been Grado SR125s for quite a while and the...

Grado SR80

WOW. I've heard binaural before, but this is particularly great. Even knowing it was just the recording, I was still looking around the room in astonishment looking for the sound...

Ultra-minimalistic = Grados, IMO.

I agree muchly You've said it much more eloquently than I could... I do think Grados are really good at being "speakers on your ears" - they're good at being headphones and presenting the sound naturally in the sense that the sound is going directly into your ears. Personally I love that...

I hate to contribute to the hilarity, but... GIVE US PICS!

I think the SR125 sounds great. I can't deny I'm used to (and prefer) a bright frequency response, though. Aside from that, however, I think the SR125 sounds very competent and annoyingly foot-tapping-inducing. Didn't the SR125 get a lot of praise from Stereophile, by the way...

I'd tend to believe that most of what we perceive as burn-in on headphones is our ears adjusting to the sound. That's not to say that there's no physical change in the drivers whatsoever, though, I'd guess. I'd imagine there's a "break-in" period on most electronic devices, especially those that...