Alesis MultiMix 12R Rack Mount Stereo Mixer

Specifications

Frequency Response
• 10 Hz – 65 kHz +0/-1 dB (any input to any output at nominal operating levels)
• -3dB Point: 125 kHz

Connectors
• MIC IN jacks: Female XLR (Pin 1 ground, Pin 2 +, Pin 3 -)
• LINE IN jacks: Female 1/4" 3-conductor phone (Tip = +, ring = -, sleeve = ground)
• INSERT jacks: Female 1/4" 3-conductor phone (Tip = send, ring = return, sleeve = ground)
  Inserting plug to first "click" allows direct output without breaking normal signal flow
• STEREO LINE IN and STEREO AUX RETURN jacks: Female 1/4" 3-conductor x 2
• MAIN OUT BALANCED, MONITOR OUT, and AUX SEND jacks: Female 1/4" 3-conductor phone (Tip = +, ring = -, sleeve = ground)
• MAIN OUT -10 dBV jacks: Female phono ("RCA") jacks
• TAPE IN jacks: Female phono ("RCA") jacks

Levels
• MIC IN: -60 dBu to -10 dBu nominal, maximum level +12 dBu
• LINE IN: -40 dBu to +10 dBu nominal, maximum level +32 dBu (balanced)
• STEREO LINE IN: -15 dBu to +15 dBu nominal, maximum input level +22 dBu
• MAXIMUM GAIN:
  +76 dB, MIC IN to MAIN OUT, balanced
  +80 dB, MIC IN to MONITOR OUT, balanced or unbalanced
• CHANNEL PEAK LED ON: 6 dB below channel clipping
• METER: Peak type
  -24 dB to PK (+18 dB over reference at MAIN OUT, 6 dB before output clipping)
• MAIN OUT LEVEL (1/4" phone jacks) (when meter is at 0 VU):
  +4 dBu (1.24 volts) into a balanced load
  -2 dBu into an unbalanced load
• MAIN OUT LEVEL (phono jacks): -10 dBV (.316 volts) unbalanced
• MAXIMUM OUTPUT LEVEL: +22 dBu unbalanced, +28 dBu balanced (6 dB above "PK" segment of main meter)
• MONITOR OUT LEVEL: Same as above, but variable following MONITOR/PHONES control
• INSERT/DIRECT OUT (tip): Unity gain
• INSERT IN (ring)l Maximum level +22 dBu
• HEADROOM: 23.5 dB above nominal output

Impedance
• MIC IN: 50-150 Ohms nominal source impedance (presents 4 kOhms balanced load impedance)
• LINE IN: 600 Ohms-2 kOhms nominal (>20 k Ohms load impedance)
• OUTPUTS (MAIN, AUX and MON): 150 Ohms unbalanced, 300 Ohms balanced
  1.1 k Ohms at -10dBV MAIN OUTS

Noise performance (typical)
Measured at MAIN OUT +4 dBu jacks, unbalanced load, 22 Hz to 22 kHz, all channels panned to center.
• MIC IN to INSERT OUT: -128.5 dBu Equivalent Input Noise at maximum gain
• Residual output noise (MASTER fader at nominal, channel faders at minimum): < -88 dBu
• 12 inputs, faders and trims at unity gain, inputs terminated 150 Ohms: < -85 dBu unbalanced (+22 dB max unbalanced out = 107 dB dynamic range)

Distortion (THD+N)
Measured with a 0 dBu signal coming into a MIC IN jack with trim set for a +15 dBu output from the insert jack.
• At INSERT jack: Better than 0.0010%
• At MAIN OUT (+21 dBu balanced output level): Better than 0.0015%

Power
• U.S.A. model: 120 VAC, 60 Hz, 40 watts power consumption maximum

Mounting
• 19" EIA rack mountable, 3 spaces

All measurements taken with an Audio Precision System One. All noise measurements taken with trim at minimum and faders at unity gain with 22 Hz to 22 kHz bandwidth unless otherwise specified. All In & Out measurements made on balanced +4 dBu connectors. (+4 dBu into a line input with faders at unity and the meter reading “0” will yield +4 dBu into a balanced load or -2 dBu into an unbalanced load.)