![]() Newer power Fet technology replaces banks of parallel small transistors with a single pair of industrial devices, each having a 700 watt / 40 amp rating. Lower voltages means the ability to run gain devices at higher bias currents, more deeply into Class A. Simpler and fewer gain stages improves speed and stability. ![]() This also allows elimination of degeneration, “that other negative feedback” in all stages. A smaller stereo Class A amplifier at a lower price, it takes advantage of the lower power requirements to have simpler single-ended circuitry and fewer parts in the signal path. Twenty plus years of ongoing innovation have kept the X and XA amplifiers at the forefront of high-end audio. They measure well, sound great, and are reliable. We use the highest quality components in simple linear topologies, assembled and tested with care and subtlety. At Pass Labs we build Fet amplifiers with excessive output stages, huge heat sinks and massive power supplies.
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