to enquire about this product!The Krell FPB 600c (Full Power Balanced) stands as one of the most formidable, legendary achievements in the history of high-end solid-state amplification. Built like a battleship and engineered with zero fiscal compromise, the FPB 600c is a true Class A masterpiece that does not simply drive loudspeakers—it exerts complete, unyielding physical authority over them. If you demand absolute dynamic freedom and limitless current delivery, this amplifier is the ultimate destination.
Pure Class A Power Without the Waste: Sustained Plateau Bias II
Traditional Class A amplifiers are notoriously inefficient, generating massive heat even when no music is playing. The FPB 600c solves this with Krell’s proprietary Sustained Plateau Bias II system. This highly sophisticated micro-processor-controlled biasing network instantly monitors the incoming audio signal and adjusts the bias level across multiple distinct plateaus. The moment the music demands explosive transients, the amplifier instantly shifts into full Class A operation, reverting safely back down during quiet passages to preserve component life and efficiency.
Flawless Balanced Architecture and Massively Overbuilt Power Supplies
From the input terminals straight through to the massive loudspeaker binding posts, the FPB 600c features a fully balanced, direct-coupled topology. By utilizing independent, mirrored circuitry for the positive and negative phases of the audio signal, common-mode noise and distortion are entirely cancelled out. This pure signal path is backed by an astonishingly massive 8 kVA power transformer capacity and an immense reservoir of filter capacitance. The result is an amplifier that acts as a flawless voltage source, effortlessly doubling its power output into lower impedances all the way down to a monstrous 2,400 watts into 2 ohms
The CAST Technology Advantage
The “c” designation marks the integration of Krell’s revolutionary CAST (Current Audio Signal Transmission) technology. When paired with a CAST-equipped Krell preamplifier (like the KCT), the connection entirely bypasses traditional voltage-domain signal degradation. Interconnect cables no longer add a sonic signature, eliminating impedance mismatches and unlocking a breathtaking level of transparency, terrifying bass speed, and a limitless, holographic three-dimensional soundstage.
