Warm Audio WA-412 4-channel Mic Preamp with DI

Warm Audio WA-412 4-channel Mic Preamp with DI

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SKU: WAWA412 Category:

Warm Audio WA-412 is a 4-channel microphone preamplifier and Instrument DI, housed in a 1U 19-inch rackmounting enclosure. Each channel has the usual complement of controls you’d expect of a professional preamp, including 48V phantom power, polarity inversion, a 20dB pad, and a high-impedance instrument input. Going slightly beyond what you might expect, each channel has a ‘tone’ switch, which changes the preamp’s input impedance, and there’s also an output trim knob, which allows you to drive the input stage in search of coloration form the transformer/op-amp, without overloading the next device in your recording chain.


4 Channel Microphone Preamplifier + Instrument DI.

Fully discrete, transformer coupled, through-hole component topology.

Altran USA custom wound, premium input and output transformers.

X520 discrete op-amp in every channel, socketed for convenience. Can be user-replaced with most 6 pin, discrete op-amps for varying flavor & tone.

65db of gain.

Inputs – Microphone XLR & Active Instrument 2Meg ohm HI-Z.

Outputs – Transformer balanced XLR & TRS.

-20db pad – pads both mic and instrument DI inputs.

TONE button input impedance – Switches from 600 ohms to 150 ohms (affects the tone of both the mic and HI-Z inputs).

Self noise: <-90dB (nominal).

Frequency response: 20hz to 20khz <+/-0.25dB (TONE button out), 20hz to 20khz +/-2dB (TONE button in).

+48 volt phantom power.

LED metering.

Output trim knob for precise level control and tone sculpting.

Internal power supply (grounded, 3 pin IEC cord).


Number of Channels: 4


4 x XLR inputs
4 x 1/4″ HI-Z instrument inputs

4 x XLR balanced outputs
4 x 1/4″ TRS balanced outputs

Phantom Power: Switchable for every channel

Gain Range: 65 dB

Input Impedance: Switchable between 600 and 150 Ohms

Rackmount Space: 1 RU

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