KST-150 vs Mark Levinson 331
The 331's power @ 8ω is 100W against the KST-150's 150W, its power @ 4ω 200W against 250W, its signal-to-noise 80 dB against 95 dB, and its thd 0.500% against 0.400%.
AI-generated product photo — not official manufacturer imagery.
KST-150
Luminance AudioAmplifiersPower Amplifiers
Estimated price (community-sourced)
$3,000
Around — community and catalog average, updates slowly
About the KST-150
The Luminance Audio KST-150 is a high-speed, solid-state stereo power amplifier designed around a balanced, cascoded three-stage circuit and complementary MOSFET output section. Its design priorities are very wide bandwidth, high slew rate, low-frequency square-wave fidelity, and stable operation into difficult reactive loudspeaker loads. The amplifier is DC-coupled at its input, uses a 700 VA EI-core power transformer, fast-recovery rectification, a large capacitor bank, channel front-end regulation, RF filtering/snubbing, and a passive output RF filter. Luminance specifies the KST-150 as unconditionally stable with nominal loads of 3 ohms or higher. It is a power amplifier only: a separate preamplifier/volume control source is required. Documentation and the manufacturer product page remain available, so it is not classified here as no longer manufactured.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 150W @ 8Ω
- Power @ 4Ω
- 250W @ 4Ω
- Damping Factor
- >100
- Minimum Impedance
- 4Ω
Analog Output
Analog signal output specifications
- THD
- 0.400%
- SNR
- 95 dB
- Output Impedance
- 0.15Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
Physical Dimensions
Size, weight, and appearance
- Weight
- 15 kg (33 lbs)
Key Specifications
Power: 150W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions