Mercenary Audio - API 3124+ 4 Channel Mic Preamp

The 3124+ is a remarkably competent set of four mic pre amps with DI and meter functions. You've known the sound of API mic pres from decades of use on every form of music under the sun, this affordable and convenient package can help you bring that classic sound to your studio at a reasonable price point.

API 3124+ features

The 3124+ is designed with the professional engineer in mind, giving the highest possible quality 4 channel mic preamp, while keeping the size and price at a reasonable level. Equally at home in the control room, the studio, and news or recording truck, at the house console, on the stage, direct-to-DAT, or at the artist's disposal for the source of his music.

The model 3124+ utilizes the same microphone preamp circuit that is used in all API consoles. It uses the RE-115 K mic input transformer and the same output transformer that is used in all API equalizers. All four mic inputs of the 3124+ are powered by an internal 48 volt phantom power supply, front panel switchable for each channel. Also provided is a front panel 20 dB pad switch that effects both the Mic and Line in.

The model 3124+ can provide up to 65 dB of gain to an output clip level of +30 dBm. 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 take input levels as high as +22, making it perfect for keyboards and other high level devices. The rear output is an XLR connector.

Uses API 2520 Op-Amp
Classic Console Circuit
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
Output Clips at +30 dBm

SPECIFICATIONS

Input Impedance: 1500Ω (mic), 470KΩ (Hi-Z)
Output Impedance: Less than 75Ω Channel Outputs
Nominal Levels: XLR Channel Output +4dBu
Stereo Output Level: Nominal -2 (unbalanced), +4 (balanced)
Clipping Level: XLR Channel Output better than +28dBm
Frequency Response: +0, -5, 10Hz - 20kHz (-0.5 at 10Hz)
Noise EIN: -129 (mic), -125 (unbalanced) Actual
Measured Noise: Better than -91dBm/below Nominal +4
Distortion: All outputs at +4 out, 0.03%, at +22, 0.09% Max
Gain Range: 150Ω input 10dB - 65dB (including Pad), unbalanced input 14dB - 50dB
VU Meter: Calibrated for XLR Outputs, OVU=+4 dBu (-12, -6, -3, 0, +3, +6, +18)
Controls: Gain, Pad (20dB), 48V, Polarity Switch, Mic/Line, VU meter

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