Parasound Halo A 21+ Silver 300 wpc x2 power amplifier

This power amplifier is a heavy hitter Parasound's 71-pound Halo A 21+ delivers a whopping 300 watts per channel, and it's stable enough to drive just about any speakers you might care to hook up. This amp is an improvement upon the company's original Halo A21, which was a popular choice among audiphiles during its own 15-year run. This newer "plus" version has a refined new look, and offers more power and improved specs almost across the board. The large toroidal transformer inside Parasound's Halo A 21+ amplifier delivers a mighty 300 watts per channel of clean power. In bridged mode, the A21+ really turns on the firehose, putting out an amazing 1,000 watts into a single channel. All that power comes from a beefy toroidal transformer and a high-bias Class A/AB amplifier design that help your system reproduce music with stunning clarity and accuracy. Class A/AB operation for smoother sound You don't see a Class A/AB amplifier every day, so let's break down the benefits. Engineers and audiophiles generally agree that Class A designs offer the purest sound, but they tend to run hot and take up a lot of space. As a result, home audio amplifiers often use a compromise known as Class AB , which hands off part of the audio signal to a different set of output transistors at high power levels. AB can sacrifice a bit of signal purity, but it lets the amp run cooler and more efficiently. So this Class A/AB amp operates in pure Class A mode up to a higher power level than most other amplifiers in its price category, before the second set of transistors kick in. The result is a sound that's smoother, less fatiguing, and more natural. Convenient connections On the back panel are balanced XLR and unbalanced RCA inputs for each channel, and each has its own individual gain control knob and loop output. There are also binding posts for connecting a pair of speakers. The amp can be rack mounted using the included ears. The legacy of John Curl The A 21+ features circuitry designed