Krell MDA-500 // Vintage / Class A Solid-State Monoblock Amplifiers

Imagine strapping a V12 engine to your stereo setup and letting it rip—that’s the Krell MDA-500. A monoblock monster born in the early ‘90s, this amp doesn’t just play music; it commands it. With a jaw-dropping 500 watts into 8 ohms and the guts to push out 4000 watts into 1 ohm (yes, really), it’s the kind of amp that laughs in the face of inefficient speakers and eats dynamic swings for breakfast.

The MDA-500 doesn’t do warmth, color, or sugarcoating—it’s a truth-teller. What you feed it is what you get, just magnified with immense control. Bass is seismic but never bloated, mids are honest and wide open, and the highs shimmer without glare. The soundstage? Enormous. Think of it as a live show in your living room, but without the drunk guy spilling beer on your shoes.

S/N: 19-29048 / 19-29055

Tested well at 500W into 8ohm - 0.1%
Replaced Negative binding posts on both amps

FACTORY SPECS

Power output: 500 watts into 8Ω (mono)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.3%

Damping factor: 50

Signal to noise ratio: 108dB

Speaker load impedance: 1Ω (minimum)

Dimensions: 19 x 8.5 x 21.25 inches

Weight: 132lbs each