[Simon] wrote in to tell us about a headphone tube amp that he just built. It is based on schematics at diyaudioprojects.com that were actually featured on Hackaday in the past. [Simon’s] design adds ...

On the day mini-amps were invented, electric guitar players the world over rejoiced. No longer would they be house-bound when jamming out on their favourite guitar. It is a doubly wondrous day indeed ...

While this op amp may actually have some utility, it is intended mainly as an educational exercise. I guarantee that if you build and experiment with this circuit, you will learn and appreciate what ...

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Ok, I've looked around, but couldn't find exactly what I'm looking for. My bro. needs (wants) a cheap, fairly low quality DIY amp. He's going to be using it to run some cheap sony speakers (unpowered) ...

I'd like to monitor the amount of power (in watts) going into my speakers. I'm not concerned about over driving them or anything, I'm just curious how much power I'm actually using. I connected a volt ...

December 20, 2009 Add as a preferred source on Google Add as a preferred source on Google If you're looking for a super-cheap way to squeeze some extra performance out of your guitar amp, this simple ...

As soon as I have a work bench area, I’m going to start getting into this stuff. The idea of having a headphone amp that I put together all by myself is incredibly attractive to me for some reason.

Not much detail here, but some creative soul squeezed a Fender amp into an old cigar box. Although not entirely practical, it’s a fine example of a good way to re-use something you’d otherwise discard ...

A quick search on Google will bring up countless ways to make DIY speakers (or volume boosting amps) for a smartphone. From a paper cup to a glass jar, nearly all of these will give you some extra ...