API 3124 MV

£0.00 £3,999.00 inc. VAT
£3,332.50 exc. VAT

Discrete 4-Channel Mic/Line Pre w/ Stereo Mixer

The 3124MV utilizes the same microphone preamp circuit that is used in all API consoles. It uses the RE-115 K mic input transformer along with the same output transformer that is used in API equalizers. The unit offers Variable Output Level Control, switchable 3:1 output transformer selection, and an internal 48-volt phantom power supply, which is front panel switchable for each channel. Also provided is a front panel -20 dB pad switch that affects both the mic and line in. A 1/4" phone jack is available on the rear panel for each channel as an insert tip-send/ ring-return placed between the mic pre amp output and the mixer input.

The 3124MV provides up to 65 dB of gain. The Hi-Z front panel input goes directly to the op-amp, allowing a low level input such as a guitar or bass to be amplified without a matching transformer or direct box. This Hi-Z input can accept input levels as high as +20 dBu, making it perfect for keyboards and other high level devices. The rear output is an XLR connector.

  • Classic API Circuit Design
  • Uses API 2520 Op Amps
  • Variable Output Level Control
  • 3:1 Output Transformer Tap Selection
  • Four XLR Mic Inputs
  • Four 1/4" Un-Balanced Inputs
  • Front Panel Polarity Switch
  • Front Panel 20 dB Pad Switch
  • Front Panel Mic/Line Switch
  • Front Panel 48V Power Switch


Input Impedance:
1500 Ohms Mic, 470 K Ohms Un-Balanced, HI-Z in
Output Impedance:
Less than 75 Ohms Channel Outputs
Nominal Levels:
XLR Channel Output +4 dBu
Stereo Output Level:
Unbalanced: nominal -2
Balanced: +4
Frequency Response:
+0, -5, 10 Hz to 20 kHz (-.5 at 10 Hz)
Noise EIN:
-129 Mic, -125 Un-Bal. Actual
Measured Noise:
Better than -91 dBm / below Nominal +4.
All Outputs at +4 out, .03%, at +22, .09% Max
Gain Range:
150 Ohms Input 10 dB Min., 65 dB Max (inc. PAD).
Un-Bal. Input 14 dB Min., 50 dB Max
VU Meter:
Calibrated for XLR Outputs, OVU=+4 dBu,
(-12, -6, -3, 0, +3, +6, +18)
GAIN, PAD (20 dB), 48Volts, POL (polarity),
MIC (mic/un-bal), VU, AC
Power Consumption, Quiescent:
19.2 Watts
19" X 1.75" (1U) X 10.5" Deep
Size (Boxed for Shipping):
23.25" X 6.5" X 16"
Actual Weight:
11.54 lbs.
Shipping Weight:
15.3 lbs.

Technical Information Downloads

3124 MV Block Diagram (PDF)