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AmplifiersPower AmplifiersDiscontinued
Estimated price (community-sourced)
$1,200
Around — community and catalog average, updates slowly
About the P422
The P422 is a two-channel Class D power amplifier built around Purifi’s 1ET400A Eigentakt amplifier modules, with a March Audio-designed power supply and buffer board. It has balanced XLR/TRS combo inputs, speaker binding posts, a 12 V trigger input, and universal AC input with automatic voltage selection. The model replaced the earlier P452 designation; March Audio later announced the P482 as its replacement.
Specifications
Amplifier type: Stereo Class D power amplifier
Amplifier modules: Purifi 1ET400A Eigentakt
Power output per channel: 450 W into 2 Ω; 425 W into 4 Ω; 227 W into 8 Ω
Maximum current output: 25 A
THD+N: 0.00019% (−114 dB) at 100 W, 4 Ω, 20 Hz–20 kHz
Output noise: 18 µV
Signal-to-noise ratio: 128 dB(A)
Output impedance: 0.0006 Ω at 1 kHz
Damping factor: 13,300 (8 Ω)
Input impedance: 20 kΩ
Frequency response: 10 Hz–60 kHz (+0/−3 dB)
Voltage gain: Selectable configuration; reported options include 20.5 dB and 26.5 dB
Inputs: Balanced XLR/TRS combo sockets; compatible with RCA sources via adapter cable
Outputs: ETI Research Kryo tellurium-copper, silver-plated speaker binding posts
Trigger: 12 V input
Mains: 100–240 V AC, automatic selection
Maximum power consumption: 1,000 W
Dimensions: 360 × 280 × 85 mm (W × D × H)