Evolution One vs Musical Fidelity A5cr
The A5cr's power @ 8ω is 255W against the Evolution One's 450W, its signal-to-noise 109 dB against 116 dB, and its power @ 4ω 416W against 900W. Both share damping factor (>100).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower AmplifiersDiscontinued
Estimated price (community-sourced)
$2,400
Around — community and catalog average, updates slowly
About the Evolution One
The Krell Evolution One is a power amplifier known for its robust output of 450 watts per channel into 8 ohms, 900 watts into 4 ohms, and 1800 watts into 2 ohms, operating in Class A mode. It features discrete circuitry gain blocks with ultra-wide bandwidth and highly linear operating points, local current feedback for low phase shift, and a balanced differential noise rejecting topology for improved clarity, especially at higher frequencies. The amplifier is housed in a black anodized aluminum chassis and includes fully regulated power supplies to maintain performance regardless of mains supply variations or load demands. It offers multiple inputs including CAST via 4-pin bayonet connector, balanced XLR, and single-ended RCA connectors, with outputs through Krell binding posts. The Evolution One is designed for load independence and low distortion, with a frequency response of 20 Hz to 20 kHz ±0.07 dB and signal-to-noise ratio greater than 116 dB (A-weighted). It weighs approximately 120 lbs (54.3 kg) and measures 17.3 x 9.8 x 20.7 inches (438 x 248 x 525 mm).
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 450W @ 8Ω
- Power @ 4Ω
- 900W @ 4Ω
- Amplifier Class
- A
- Damping Factor
- >100
Analog Output
Analog signal output specifications
- THD
- 0.020%
- SNR
- 116 dB
- Output Voltage
- 2.3V RMS
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 438 × 248 × 525 mm (W × H × D)
- Weight
- 54.3 kg (120 lbs)
Key Specifications
Power: 450W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions