The Emotiva XPA-2 is a two-channel amplifier is one of the most powerful, highest value amplifiers we've reviewed to date. It is a lone wolf in a pasture of sheepish amplifiers. Power output: 250 ...

The Emotiva UPA-2 Stereo Amplifier is an incredible solution to turn a $500 AV receiver into a real powerhouse - and for FAR less money than it would cost to buy a comparable quality flagship product.

The $1,699 Schiit Audio Ragnarok 2 Integrated Amplifier plays in the sandbox with some heavy hitters. Does its headphone amplifier make it better? Integrated Amplifiers have become a huge segment ...

Ex-movie theater projectionist Steve Guttenberg has also worked as a high-end audio salesman, and as a record producer. Steve reviewed audio products for CNET and worked as a freelance writer for ...

Although relatively expensive, monofilar-wound, bipolar stepper motors provide strong torque for a given physical size. However, each of the motor's two windings requires eight driving transistors ...