Each RM-MP12 input may be individually calibrated for unbalanced consumer, balanced professional, 8 Ohm speaker line or constant voltage speaker lines. There is a variable intensity LED on the front panel to show audio presence for each input. If the RM-MP12 is set to the interlocking operating mode, front-panel pushbuttons select one of the twelve inputs to feed the calibrated meter, front-panel speaker (or external speaker if connected) and headphone jack. In the mixing mode, the buttons allow the use to mix multiple sources. The front-panel volume knob controls the audio level of the front-panel headphone jack, front-panel speaker, external speaker output and variable line level (+4 dBu) rear-panel output. A separate fixed line-level output is provided.
Front-Panel VCA Control for Headphone and Speaker Output Levels
Internal 4.5 W RMS Power Amplifier and Speaker
Audio Inputs and Outputs on Detachable Terminal Blocks
Inputs (12):
+4 dBu, 25 V, 70.7 V, 100 V (set by rear-panel switches)
Input Level:
-11 dBu to +9 dBu (+4 dBu input) 25 V, 70.7 V, 100 V (calibrated with gain trim set fully counter-clockwise)
Headroom:
> 18 dB (above calibrated input level)
Gain:
0 dB to 20 dB (Adjustable for speaker-level input, 25-turn trim potentiometer)
-5 dB to 15 dB (+4 dBu input)
Frequency Response:
10 Hz to 20 kHz (+/-0.25 dB)
THD+N:
< 0.010% (20 Hz to 20 kHz)
Intermodulation Distortion:
< 0.025% (20 Hz to 20 kHz)
Channel to Channel Crosstalk:
< -80dB (10Hz to 20 kHz)
Residual Noise:
< -80 dB (Channel ON; referred to +4 dBu)
Off Attenuation:
> 80 dB (10 Hz to 20 kHz)
Indicators per Channel (2):
Red channel active LED above button; Variable intensity audio level LED for each input (minimum intensity at -15 dB, maximum intensity at 0 dB)
CMRR:
> 75 dB (50 to 120 Hz)
Outputs (4):
150 Ohms, +4 dBu fixed level (balanced or unbalanced via plug-in terminal block)
150 Ohms, +4 dBu variable level (balanced, controlled by front-panel volume knob)
4.5 W RMS external speaker connection (use of external speaker disconnects internal speaker) 100 mW ¼-inch stereo headphone jack
Power Requirement:
GROUND-REFERENCED, 24 to 33 Vdc @ 700 mA