Power Amplifiers

Bryston 14B SST2 Stereo 600 Watt per Channel Power Amplifier

ARTICLE INDEX

The Design

The Bryston 14B SST2 is a Class AB solid state amplifier, push-pull, and fully differential (balanced). It has separate power supply transformers for each channel, and 30,000 μF of capacitance for each channel as well, making the amplifier essentially a dual mono design.

It has true balanced XLR as well as unbalanced RCA inputs, and a selectable sensitivity switch for use with preamplifiers that have more or less output (gives you more range in the volume control).

There are four gain stages in the 14B. The input buffer has a gain of 2, followed by the main amplifier input stage with a gain of about 10. The second stage has a voltage gain of 100,000, followed by the output stage that has a voltage gain of 4 and a current gain of more than 1,000,000. The output stage of most power amplifiers only has current gain. In the 14B, there is a small amount of voltage gain in the output stage which lets the voltage gain stage (the second stage) operate completely in its linear range, maintaining low distortion.

The rear panel has the XLR and RCA input jacks, switch for selecting XLR or RCA, sensitivity switch, five-way binding posts, and grounded AC receptacle. There is also a main power on/off toggle (the standby switch is on the front).

The review unit was 19" wide, but it also is available in a 17" wide version for rack mounting. It's a hefty 85 pounds and has handles on the front as well as the rear for moving it into position.

The 14B is a beautiful animal. It seemed to roar from its shelf in the test lab even when it was only in standby mode. Expect your lights to dim when this thing puts out full power.