B12A MKII Mic Pre
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  • Black Lion Audio B12A Mark 2 Mic Pre Front
  • Black Lion Audio B12A Mark 2 Mic Pre Back

B12A MKII Mic Pre

What happens when you take the stately B12A and add some extra special sauce? You get the B12A MKII! With a titillating Cinemag input transformer, less noise, and more API®-style gain than ever before, the B12A MKII will sweeten your preamp collection for years to come! According to Phil O’Keefe at Harmony Central, “Black Lion Audio’s B12A MKII is one of the best ways to get into a 312A style preamp at a reasonable price,” (full review here). Get ready to hear what you’ve been missing!

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SKU: B12A MKII Categories: ,
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Inspired by the classic American rock sound of the original API® 312A, the B12A MKII delivers the high-end sound and rugged quality you’d expect from B.L.A., at an amazing price! The B12A MKII is a single-channel microphone preamp in the style of an API® 312A, and features an upgraded input transformer, higher gain, and lower noise than the original B12A. It also features an output transformer, a Hi-Z input, phantom power, pad, phase, and is housed in a 1U, 1/2 rack chassis.

Registered trademarks belong to Automated Processes, Inc.

Additional Information

Weight 6 lbs
Dimensions 13 x 13 x 5 in

FRONT

  1. POWER: flip switch up to turn preamp on, flip switch down to turn preamp off
  2. 48V: engage to turn phantom power on, disengage to turn phantom power off
  3. PHASE: engage to adjust input signal polarity by 180°, disengage to leave input signal polarity unchanged
  4. PAD: engage to reduce input signal amplitude by 18dB, disengage to leave input signal amplitude unchanged
  5. GAIN: clockwise rotation yields an increase in output signal amplitude, counterclockwise rotation yields a decrease in output signal amplitude
  6. Hi-Z: engage to use front panel Hi-Z IN as preamp source, disengage to use XLR input as preamp source
  7. Hi-Z IN: input jack for use with high impedance, unbalanced sources (GAIN knob adjusts signal amplitude)

BACK

  1. OUTPUT: balanced, line-level TRS output
  2. INPUT: balanced, mic-level XLR input
  3. GND: internal chassis ground
  4. POWER: 24VAC input jack (only use a B.L.A.-specified power supply)

FEATURES

  • Cinemag Input Transformer
  • Edcor Output Transformer
  • 70dB Gain
  • Hi-Z Input (passive, unbalanced)
  • Phantom Power
  • 18dB Pad
  • Phase Switch
  • XLR Microphone Input
  • TRS Line Output (balanced)

SPECS

Mic Section

  • Max Microphone Input Level: +1dBu
  • Input Impedance: 200Ω
  • Pad: 18dB
  • Gain (no pad): +26dB to +70dB
  • Equivalent Input Noise (noise floor): -120dBu
  • THD+N (@ +4dBu output):
    • .012% @ +22 dBu
    • .013% @ +36 dBu
    • .046% @ +56 dBu
    • .145% @ +66 dBu
  • Bandwidth (1kHz, 150Ω source, unweighted): 10Hz to 30kHz

D.I. Section

  • Max D.I. Input Level: +18dBu
  • Input Impedance: 1.1MΩ
  • Pad: none
  • Gain: +10dB to +53dB
  • Equivalent Input Noise (noise floor): -102dB
  • THD+N (@ +4dBu output):
    • .013% @ +10 dBu
    • .124% @ +36 dBu
  • Bandwidth (1kHz, 600Ω unbalanced source, unweighted): 10Hz to 30kHz

Output Section

  • Max Output Level: +28dBu
  • Output Impedance: 600Ω

Power Supply

  • 24VAC, 500mA External Supply

Product Dimensions

  • 9.5” x 6.5” x 1.75”

Product Weight

  • 3.2 lbs

Shipping Dimensions

  • 13” x 13” x 5”

Shipping Weight

  • 6 lbs

RAVES

Black Lion Audio’s B12A MKII is one of the best ways to get into a 312A style preamp at a reasonable price.

– Harmony Central (full review here)

Direct guitars and basses have a warmth and depth that’s musical and sweet. It doesn’t tend to color the sound, just gives more. It really excels at warming up sterile sonics. It’s a classic sound, and considering that the API 312A was an inspiration in its design, it lives up to that in spades.

– Performer Mag (full review here)

…we were impressed time and again with the B12A’s faithful recreation of the classic API sound. Its character is big, warm and quite muscular with plenty of punch. The bottom-end is solid and weighty while the upper frequencies are clear and reasonably extended.

– MusicTech (full review here)

If you crave the vintage API sound but the budget is a little tight… [the B12A MKII’s] one that you ought to listen to.

– Sound On Sound (full review here)

“…we were impressed time and again with the B12A… Its character is big, warm and quite muscular with plenty of punch.”  

MusicTech

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