Black Lion Audio B12A Quad 4-Channel Preamp with Mic and DI Inputs

Product #81732 | SKU B12A QUAD | Black Lion Audio
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  • For Engineers Who Prefer the 312 Sound
  • Warm, Punchy Sound
  • 4 x Mic Inputs & 2 x DI Inputs
  • Up to 70 dB of Gain
  • Input & Output Gain Attenuators

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Designed for recording engineers who want an updated take on 312A-style gain, the Black Lion Audio B12A Quad 4-Channel Preamp with Mic and DI Inputs is a four-channel preamp with a punchy, rock'n'roll tone. It's suitable for recording drums, guitars, basses, or even aggressive vocals.

This preamp gives you four channels in a 1-RU package. XLR connections on the rear of the unit correspond nicely with your microphones, while you can plug any electric bass or electric guitar into the two 1/4" DI inputs located on the front panel. To better correspond with a variety of downstream gear, both XLR and 1/4" outputs are provided. Each output can be run in parallel, should you need to divert a single output to two different sonic destinations.

All four channels offer up to 70 dB of gain. Each channel sports its own phantom power switcher for condenser microphones, as well as a polarity-reverse selector and an 18 dB pad switch. A Hi-Z switch on channels one and two lets you choose between the mic and DI input. Gain and output knobs allow you to fine tune the level of each instrument; if you wished, you could drive the signal hard with the gain knob for a harmonically rich tone, then lower the output knob to avoid clipping your digital convertor downstream.

The B12A Quad employs Cinemag transformers on both the input and output stages, ensuring a rock-solid, meaty tone that lovers of classic 312-series preamps will enjoy. Output metering is made possible via four 7-segment light metres. These shine green most of the time, go yellow just before clipping, and of course, give you the red light when you're pumping too much signal through the unit.


Input Level Microphone: +1 dBu maximum
DI: +18 dBu maximum
Gain Microphone: +26 to +70 dB
DI: +10 to +53 dB
Impedance Microphone: 200 Ohms
DI: 1.1 MOhms
Pad 18 dB for microphone input
Phantom Power 48 V, selectable
Polarity Reverse 180°, selectable
Controls 4 x gain knobs
4 x output knobs
4 x phantom power selectors
4 x pad selectors
4 x polarity-reverse selectors2 x Hi-Z selectors (channels 1 and 2)
Connections Microphone: 4 x XLR
DI: 2 x 1/4", phone type
Equivalent Input Noise Microphone: -120 dBu
DI: -102 dB
THD+N Microphone at +4 dBu Output:
  • 0.012% at +22 dBu
  • 0.013% at +36 dBu
  • 0.046% at +56 dBu
  • 0.145% at +66 dBu

DI at +4 dBu Output:
  • 0.013% at +10 dBu
  • 0.124% at +36 dBu


Bandwidth Microphone: 10 Hz to 30 kHz (1 kHz, 150-Ohm source, unweighted)
DI: 10 Hz to 30 kHz (1 kHz, 600-Ohm source, unweighted)
Output Level 28 dBu maximum
Output Impedance 600 Ohms
Connections 4 x XLR
4 x 1/4" / 6.3 mm
Rack Space 1 RU
Dimensions Not specified by manufacturer
Weight Not specified by manufacturer

In The Box

  • Black Lion Audio B12A Quad 4-Channel Preamp with Mic and DI Inputs


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  • Product: Black Lion Audio B12A Quad 4-Channel Preamp with Mic and DI Inputs
  • Manufacturer: Black Lion Audio
  • Model: B12A QUAD
  • SKU: B12A QUAD
  • RM Product #: 81732

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