May I ask where you get those THD+N and power values. Benchmark's spec is below and @Matias 's spreadsheet shows the same values.Does this answer your question?

Name THD+N

(5W, 4 ohms)SINAD (dB)

(5W, 4 ohms)Power (W)

(1% THD+N, 4 ohms)Price (USD) Source Benchmark AHB2 (stereo) 0.00023% 113 210 3,000 ASR Benchmark AHB2 (mono) 0.00026% 112 500 6,000 ASR March Audio P422 0.0006% 104 400 1,625 thin bLue

Courtesy of @Matias awesome spreadsheet.

### CONTINUOUS AVERAGE OUTPUT POWER

< 0.0003 % THD+N at full rated power, 20 Hz to 20 kHz- 100 Watts per channel into 8 Ohms, both channels driven
- 130 Watts per channel into 6 Ohms, both channels driven
- 190 Watts per channel into 4 Ohms, both channels driven
- 240 Watts per channel into 3 Ohms, both channels driven
- 200 Watts into 16 Ohms, bridged mono
- 380 Watts into 8 Ohms, bridged mono
- 480 Watts into 6 Ohms, bridged mono

### Benchmark AHB2 Power Amplifier

Benchmark's new AHB2 Power Amplifier - "The Quietest, Cleanest Audio Amplifier on the Planet"

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