I've been working on my own amplifier design for a while now, and have finally come up with something that seems to be working well. My design goals were straightforward enough: - Make it fully balanced. 2 channels will work well with good enough grounding, 3 channels improves things, 4...

I've been struck by the elegance of an integrated amp/DAC for some time, and finally decided to sit down and design one. In exchange for giving up some flexibility (and cost), there are a number of advantages: a vastly shorter overall signal path, no line-level interconnects and connectors...

With the return to popularity of multichannel audio, a lot of albums are being rereleased in surround-sound format. This is all well and good for people who have multi-speaker systems, but doesn't help us headphone types much at all. It seems to me that it should be possible to use a...

The general wisdom in the headphone amp world is that switching power supplies are bad. They produce all sorts of nasty ripple which can easily affect the audio band, much more so than a typical linear regulator. So I'm wondering, why not combine the two? A linear regulator like the LM317 is...

I'm reposting this from inside another thread on HeadWize, since this forum gets more traffic. I was playing around with case designs over the vacation, and came up with this... - Based on the new Kevin Gilmore Dyna-GBF-FET design - The base is 10" by 12"; room for two Power One...

I haven't built this yet, but I do have the basic design worked out... - Monitoring done with Atmel ATtiny24 microcontroller - Two differential input channels supporting any amplifier topology (2-channel, 3-channel, 4-channel differential, single- and dual-power-rail) - Onboard +5...

Nothing fancy here, op-amp virtual ground and active ground channel (a la PINT). C1 and C2 (power supply decoupling) are ceramic, C3 and C4 (input) are film. 10k pot not included in the schematic. Anything I should change before ordering parts? (I have a rather nice PCB layout for this...

I'm trying to set up a crossfeed for my new headphone rig (Transporter + Dynahi), and it struck me that it might be better to do all the processing in software rather than building something like the CMoy modified Linkwitz crossfeed. However, I haven't been able to find a good filter config file...