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Specications
Audio
Voltage gain
MPA 401-70V
RCA and TRS inputs ........... 222x (47 dB)
Captive screw input ........... 57x (35 dB)
MPA 401-100V
RCA and TRS inputs ........... 317x (50 dB)
Captive screw input ........... 81x (38 dB)
CMRR ............................................ 75 dB (typical) @ 1 kHz
Bass adjustment ............................. ±10 dB @ 100 Hz
Treble adjustment ........................... ±10 dB @ 10 kHz
Audio input
Number/signal type ........................ 1 stereo/mono, balanced/unbalanced input
2 stereo/mono, unbalanced inputs
(The three inputs are individually buffered and mixed together. Stereo signals
are actively summed into a mono signal.)
Connectors .................................... (1) 3.5 mm captive screw connector, 5 pole (main input)
(1) 3.5 mm mini audio jack (tip, ring, sleeve)
1 pair RCA
Impedance ..................................... >10k ohms balanced/unbalanced, DC coupled
Maximum level ............................... +20 dBu (balanced, captive screw) or +4 dBV (unbalanced, RCA/TRS) at
1% THD+N
Input sensitivity
RCA and TRS inputs ................. -10 dBV if driven by one input
-16 dBV if both inputs are summed
Captive screw input ................. +4 dBu if driven by one input
-2 dBu if both inputs are summed
NOTE: 0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu
Audio output
Number/signal type
MPA 401-70V .......................... 1 single channel (mono) 70 V
MPA 401-100V ........................ 1 single channel (mono) 100 V
Connectors .................................... (1) 5 mm screw lock captive screw connector, 2 pole
Load impedance
MPA 401-70V .......................... 125 ohms minimum
MPA 401-100V ........................ 250 ohms minimum
Frequency response ........................ 80 Hz to 20 kHz, +1 dB/-3 dB, 1 watt
THD + Noise ................................... <0.2% @ 1 kHz at 3 dB below clipping
S/N ................................................. >75 dB, 20 Hz to 20 kHz, unweighted
Damping factor .............................. >100
High pass filter ............................... 80 Hz, 12 dB/octave roll off
Amplifier type ................................ Class D
MPA 401-70V and MPA 401-100V • Specications 10