Give your old bookshelf speakers a new lease on life.

What is the LM386 audio amplifier? The integrated chip LM386 is a low power audio frequency amplifier requiring a low level power supply (most often batteries). It comes in an 8-pin mini-DIP package.

Rotel just released the high performance RB-1582MKII (200-watt x 2) and RB-1552MKII (120-watt x 2) class A/B stereo power amplifiers. Each amplifier is built with an engineering philosophy called ...

This project was a sort of challenge: designing an audio amplifier capable of delivering a decent output power with a minimum parts count, without sacrificing quality. The Power Amplifier section ...

The Audiophiliac found a lot to like about the new Rotel RA-1570 amp, for hi-fi and stereo home theater applications. Ex-movie theater projectionist Steve Guttenberg has also worked as a high-end ...

A conventional tube amplifier has a circuit whose fundamentals were well in place around a hundred years ago, so there are few surprises to be found in building one today. Nevertheless, building one ...

Quad announced the Elite QSP stereo power amplifier with their latest Current Dumping technology to deliver an awesome sound from a compact package. The Elite QSP — which stands for Quad Stereo Power ...

Can these two extra cool amps--the Bel Canto REF500S ($2,495) and the Dayton DTA-100 ($100)--offer green power for audiophiles? Ex-movie theater projectionist Steve Guttenberg has also worked as a ...

There are few greater follies in the world of electronics than that of an electronic engineering student who has just discovered the world of hi-fi audio. I was once that electronic engineering ...

This is a review of the Pass Labs X350.5 350wpc stereo amplifier. Excellent bench tests and pristine sonic virtues would please even the most discriminating audiophile. I’ve been on a high-end kick as ...