Both the 3124V and 3124MV are designed with the professional engineer in mind. Both units offer four channels of the highest quality microphone preamp possible. However, the 3124MV provides an additional audio mixer with a transformer-balanced output, keeping the unit size and price reasonable. Both models are equally at home in the control room, recording studio and truck, or on stage.

The 3124MV utilizes the same microphone preamp circuitry used in all API consoles. It is equipped with the AP2516 input transformer and proprietary output transformer found in all API mic pres and across the entire API product line. The unit offers variable output level control, selectable 3:1 output transformer selection, and an internal 48-volt phantom power source, which is front panel switchable for each channel. Also provided is a -20 dB pad switch on the front panel that affects both the microphone and line input. preamplifier output and mixer input.

Like the 3124V, the 3124MV offers 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 of up to +20 dBu, making it perfect for keyboards and other high-end devices. The rear output is an XLR connector.

Additionally, the 3124MV adds a stereo panner with a level control and a post-fader aux send. Stereo panners and aux sends are routed to the master output controls and then to the rear panel connectors. A stereo AUX return is provided to cascade additional effects or mixers back to more inputs. The unique stereo auxiliary return control acts to balance the left/right signal while remaining stereo. Can also be used as mono return.

Characteristics

• Classic API circuit design;
• Uses API 2520 operational amplifiers;
• Variable output level control;
• 3:1 output transformer tap selection;
• Four XLR microphone inputs;
• Four 1/4-inch unbalanced inputs;
• Front panel polarity switch;
• 20 dB pad switch on front panel;
• Front panel mic/line switch;
• Front panel 48V power switch.

Specifications

• Preamplifier type: solid state;
• Number of channels: 4;
• Phantom power: yes;
• Analog inputs: 4 x 1/4 in. (Hi-Z), 4 x XLR (mic), 1 x 1/4 in. (auxiliary return);
• Analog outputs: 4 x XLR, 1 x 1/4 in. (auxiliary send), 2 x 1/4 in. (stereo output);
• Channel inserts: yes;
• Rack Spaces: 1U;
• Power source: Standard IEC AC cable.