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Specifications
The correlation between published specifications and performance is
unreliable. Measurements of your amplifier yield excellent results by
any standards. However, only those specifications that apply to its
actual operation are included here. All specifications are subject to
change at any time.
Nº432 rated power output: • 400 w/ch rms power @ 8Ω
• 800 w/ch rms power @ 4Ω
Nº431 rated power output: • 200 w/ch rms power @ 8Ω
• 400 w/ch rms power @ 4Ω
All above power ratings from 20 Hz–20kHz at <0.5% THD
(assuming that the AC mains can deliver adequate current, without
its own voltage sagging)
Frequency response: • within .3 dB from 20 Hz to 20 kHz
Signal to Noise ratio: • better than –65 dB (ref. 2.83V)
Input impedance: • 100kΩ (balanced)
• 50kΩ (unbalanced)
Voltage gain: • 26.8 dB
Input sensitivity: • 2.83V output: 130 mV for both models
• Full output: 2.58V for Nº432, 1.82V for Nº431
Nº432 power consumption: • 650W in on, 130W in standby, 10W in sleep
Nº431 power consumption: • 375W in on, 100W in standby, 10W in sleep
Mains voltage: • determined by the needs of country for which the unit was
manufactured; cannot be reset by dealer or user
Overall dimensions: • See “Dimensions”
Nº432 shipping weight: • 125 lbs. (57 kg) each
Nº431 shipping weight: • 105 lbs. (48 kg) each
Nº432 net weight: • 115 lbs. (52 kg) each
Nº431 net weight: • 95 lbs. (43 kg) each
Connector complement: • four custom binding posts
• two 3-pin XLR balanced input connectors
• two RCA input connectors
• two 1⁄8" mini-jacks for remote turn-on
• one RS-232 port on RJ-11
• two Mark Levinson communications ports on RJ-11, RJ-45
• one IEC-standard AC receptacle
Output impedance: • less than 0.02Ω from 20–20,000 Hz
Damping factor: • greater than 400, 20–20,000 Hz @ 8Ω