For a while, I've been listening to my headphones (Ety HF-5) driven by my TDA2030A-based desktop speaker amplifier. I finally build a CMOY-type amplifier with an LM6172 and it seems to have more impactful bass than the TDA2030As did. TDA2030s are driven straight off a voltage-doubler from a...

So, I built a headphone amp using a TDA1517P that I rescued from a pair of cheap desktop speakers. Has lots of hiss, but adds so much impact and clarity to other sounds, that I figured I'd better keep using an amp. Anyway, I built it on a radioshack generic PCB, and it's been bare, on my desk...