In the ProMPA-II, each input circuit features 48V phantom power and variable input impedance that can radically vary the overall performance of any high-quality dynamic or ribbon microphone. The MPA-II can be configured for dual mono or stereo operation with selectable center/side microphone support, summing adjacent channel, to decode left/right signals.
The MPA-II's input section operates at a low or high plate voltage applied to the two hand-selected 12AX7 tubes for greater variation in sound and preamp performance. Large backlit analog VU output meters display output levels while multi-color LED arrays, with mid or maximum hold, display tube gain and digital output levels.
The ProMPA-II comes in a standard 2u space rack-mountable steel chassis, with a CNC-routed black anodized aluminum front panel.
Features :
- Variable input impedance for flexible microphone sound reinforcement (150 Ohms to 2400 Ohms)
- Selectable plate voltage
- Large VU meters
- Backlit function switches
- Discrete Class A input microphone preamplifier
- Low noise level with lower gain settings
- Extremely low total harmonic distortion (THD)
- Wide frequency response
- Additional front-mounted instrument input jack
- Support for side and middle miking technique
- Operates at +4dbm/-10dbv Output
- Selectable stereo/dual operation of output controls
- Automatic selection of instrument input
- Extended dynamic range A/D
- Rotary encoder for quick selection of sample rate
- Separate analog and digital output level controls
- LED digital level meters display average level and peak level.
- Two wordclock sockets allowing looping
Specifications:
- Frequency response 15Hz to 48 kHz (+0, -1dB) @ normal plate voltage
- 15Hz to 120 kHz (+0, -1dB) @ high plate voltage
- Dynamic range: >110dB (“A” weighted)
- CMRRR: 90dB >90dB
- DHT: <0.005% (typical)
- Equivalent input noise: -129dBu (XLR, “A” weighted)
- Maximum input level: +19dBu (cannon)
- Maximum instrument input: +17dBu
- Input impedance: 150-3000 Ohms adjustable (XLR) >800K Ohms (Instrument)
- Maximum output level: +27dBu (XLR)
- Output impedance: <47 Ohms (XLR)
- Maximum gain: 75dB
- Meter calibration: 0 VU = +4dBu output (+4dBu mode) 0 VU = -10dBV output (-10dB mode)
- High pass filter: unipolar, 10-200 Hz adjustable
- Power supply required: USA - 105 to 125 VAC / 60 Hz Export units configured for destination country
- Dimensions: (HxWxD in) 3.50 x 19.0 x 8.75
- Dimensions: (HxLxD mm) 88 x 482x 222
- Weight: (lb/kg) 10.5 / 4.7