Can a 3.5-watt amplifier rock your world? Three and half watts may not sound like much, but you'd be surprised just how good this mini vacuum tube amplifier can sound.

Building a tube amp is a dream for many engineers and makers alike. But factors like the cost, large enclosure, transformers, and complicated wiring harnesses can scare even the most ambitious away.

The mini wonder is garnering raves from a number of audiophile magazines worldwide, and I think that's just great. If you're curious about the sound of tubes, here's your chance to get in on the fun.

To test the amplifier two supply voltages are needed one for the anodes and one for the heaters. In theory the voltage for the heaters should be two times 13 V (according to the datasheet, or maybe ...

Positive hasn't mentioned pricing for the Spark Mini, but it will be available to pre-order in March. It's safe to say the minuscule amp will cost less than its $299 full-size counterpart ...

It’s not every day we see the results of someone putting their own spin on a vintage tube amp, but that’s exactly what [lens42] did in creating the McIntosh 217, created as a “mini ...