List of best DIY Headphone Amplifiers

[jasonRF]

I recently made measurements of this same amp, but as mounted in an Altoids tin and two 9v rechargeable batteries. The performance was very good - nice SE Class A like harmonic distortion profile.

Am I correct in thinking that you get about 4 hours of battery life when running at 70mA/ch with those 600mAh batteries, or am I missing something?

 

[xrk971]

The 373mW before clipping data was on the pocket one powered by two 9v rechargeable batteries. Whereas the one I loaned to my friend with the Susvarna was powered by wall power AC/DC. Probably more power.

I have a single board version of that amp now that I test max power soon. Should be good for 1.5W into 32ohms according to my estimates. This has built in SSR protection relays for no popping and a very clean PSU.