Proton Reviews

Proton 930
Stereo Receiver

The Proton 930 stereo receiver combines a high-performance FM tuner section designed by Larry Schotz with an amplifier capable of driving load impedances as low as 2 ohms at high power...
Proton AA-2120
Stereo Amplifier

The Proton AA-2120 is a powerful “dual mono” stereo power amplifier whose channels share only a cabinet, power cord, and on/off switch. The amplifier circuits for the two channels...
Proton D1150
Power Amplifier

Proton’s Dynamic Power on Demand (DPD) amplifiers use a form of two-level signal-controlled power supply that makes it possible for them to deliver very large peak power outputs—several...
Proton D1200
Power Amplifier

Proton’s D1200 power amplifier features a Dynamic Power on Demand (DPD) circuit design that gives it an extraordinary dynamic-headroom rating of 7.3 dB. Proton’s DPD system was...
Proton D540
Integrated Amplifier

Amplifier designers have long recognized the significance and desirability of a high short-term reserve power capability; it is the basis for the dynamic-headroom specification. But...
Proton SD-1000
Surround Decoder

The increased integration of home video and high-fidelity music systems has spurred the development of audio/video (A/V) receivers and surround-sound decoders that can be used with...