Parasound Halo A21+ Stereo Power Amplifier

In store sales only Parasound's new 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.   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.   Class A/AB operation for smoother sound 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. This Class A/AB amp operates in pure Class A mode up to a higher power level than