Not everyone wants or needs a single feature-loaded surround receiver, which is where the AudioSource Amp One/A 160-watt stereo amplifier comes into play. A favorite of audiophiles everywhere, the device is built to deliver powerful music, pure and simple, with few gratuitous extra controls to get in the way. Listeners can use the Amp One/A as an independent stereo amp (80 watts x 2) when used with a preamp, or as an adjunct amp for a low-powered surround receiver with preamp outputs (it delivers 200 watts of mono power). Combine the Amp One/A with an additional monoblock amp and a preamp and listeners can powerfully drive two front left/right speakers or two rear speakers, further clarifying each channel to create dynamic, high-end sound. To connect additional components to the amp, use the included line-in jacks (for connecting to a source such as a receiver, CD player, or preamplifier) or the line-out/thru jacks (for creating a multi-amp setup). It's also simple to switch between stereo and mono modes thanks to the bridging switch.

The amp features a precise frequency response of 20 Hz to 20 kHz and total harmonic distortion of less than 0.04 percent--barely enough to register to the human ear. It also boasts color-coded five-way binding posts that make it easy to hook up stereo speakers. And at 16.5 by 2.38 by 11.62 inches (W x H x D), the device should fit comfortably in most rack mount or home entertainment setups. In addition, the Amp One/A is covered by a two-year warranty on parts and labor.

What's in the Box
Amp One/A amplifier, user's manual.