API 3124MV 4-Channel Mic Preamp with Mixer
The API 3124MV is a versatile 4-channel microphone preamp that combines the acclaimed API 312 preamp circuit with an integrated stereo mixer, giving you classic analog tone and flexible routing in a single compact unit. Built for professional engineers, the 3124MV is ideal for use in the studio, live sound rigs, remote recording trucks, or stage setups — offering high-end audio performance with added summing and send capabilities.
At its core, the 3124MV features four API 312 mic preamps with up to 65 dB of gain, powered by API’s RE-115 K input transformer and the legendary 2520 op amps. Like its sibling, the 3124V, this unit includes Variable Output Level Control and a 3:1 output transformer tap selection for precise gain staging and tonal shaping. Each channel includes switchable 48V phantom power, -20 dB pad, polarity reverse, and mic/line switching — all from the front panel.
The front-panel Hi-Z instrument inputs connect directly to the op amps, eliminating the need for a DI box, and can accept signals up to +20 dBu — perfect for bass, guitar, keyboards, and other line-level instruments. On the rear panel, XLR outputs provide standard mic pre connectivity, while dedicated 1/4” insert jacks (tip-send, ring-return) allow for external processing before the mix stage.
Built-in Mixer with Aux Sends & Stereo Return
What sets the 3124MV apart is its powerful integrated stereo mixer, complete with stereo panning, level controls, and a post-fader aux send per channel. A stereo AUX return allows you to route in external effects or cascade additional mixers. The AUX return control functions as a stereo balance or mono return, making it perfect for both signal blending and expansion. Master output controls manage the final stereo mix level, routed to dedicated rear outputs.
Key Features:
- Classic API 312 microphone preamp circuit
- Uses API 2520 discrete op amps for signature tone
- 4 XLR mic inputs and 4 front-panel 1/4″ Hi-Z instrument inputs
- Up to 65 dB of gain per channel
- Variable Output Level Control
- 3:1 Output Transformer Tap for added headroom and tonal options
- Insert jacks (tip-send/ring-return) between preamp and mixer stage
- Built-in stereo mixer with panners, level knobs, and post-fader aux sends
- Stereo AUX return with balance/mono function
- Front-panel switches for 48V, pad, polarity, and mic/line selection
- Rear-panel balanced XLR outputs and stereo mix outs
The API 3124MV offers the warmth and punch of classic API mic preamps with the added power of an onboard analog mixer — perfect for front-end signal capture, live recording rigs, and summing small setups with uncompromised analog tone.