API 3124V Discrete 4 Channel Mic/Line Pre with Variable Output

API 3124V

The API 3124V is a compact 4 channel mic preamp perfect for any professional engineer or studio. It has a RE-115K mic input transformer and a proprietary output transformer found in all API gear.

The 3124V offers variable output level control and switchable 3:1 output transformer selection. The unit has an internal +48v phantom power supply which is switchable for each channel along with a -20dB pad switch.

The unit provides up to 65dB of gain and the Hi-Z front panel goes directly into the op-amp, allowing any low level inputs such as a guitar or bass to be amplified without a matching transformer or D.I box.

API 3124V Features

• Classic API Circuit Design
• Uses API 2520 Op Amps
• Variable Output Level Control
• 3:1 Output Transformer Tap Selection
• Four female XLR mic inputs
• Four front panel 1/4" Hi Z instrument inputs
• Front panel polarity switches
• Front panel -20dB pad switches
• Front panel mic/instrument switches
• Front panel 48V power switches

Specifications

• 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.
• Distortion: 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)
• Controls:
• GAIN
• PAD (20 dB)
• 48Volts
• POL (polarity)
• MIC (mic/un-bal)
• VU
• AC
• Power Consumption, Quiescent: 19.2 Watts
• Size: 19" X 1.75" (1U) X 11" Deep
• Actual Weight: 10.38 lbs.