The API-style design features a delicious Cinemag input transformer, serves up huge portions of low-noise gain, and has the same classic American rock sound that the original API 312A is known for! Get ready to fill your lunchbox, 'cause once you go Black Lion Audio, you never go back!

The B12A MKII 500 is a single-channel, 500 series microphone preamp in the style of an API 312A. It features a Cinemag input transformer, an Edcor output transformer, a Hi-Z input, phantom power, pad, and phase. Its plentiful, low-noise gain makes it easy to use with a wide range of microphones in live, broadcast, and studio environments. Its ultra-punchy, detailed Hi-Z input is perfect for capturing keyboards, synthesizers, and drum machines. It's the ideal companion to pillowy, fat sounds, and will liven up a mix with an undeniable energy!

500 Series format (lunchbox required)

Cinemag Input Transformer

Edcor Output Transformer

70dB Gain

Hi-Z Input (passive, unbalanced)

Phantom Power

18dB Pad

Phase Switch

Mic Section

Max Microphone Input Level: +1dBu

Input Impedance: 200

Pad: 18dB

Gain (no pad): +26dB to +70dB

Equivalent Input Noise (noise floor): -120dBu

THD+N (@ +4dBu output):

.010% @ +22 dBu
.010% @ +36 dBu
.041% @ +56 dBu
.122% @ +66 dBu

Bandwidth (1kHz, 150 source, unweighted): 10Hz to 30kHz

D.I. Section

Max D.I. Input Level: +18dBu

Input Impedance: 1.1M

Pad: none

Gain: +10dB to +53dB

Equivalent Input Noise (noise floor): -94dB

THD+N (@ +4dBu output):

.009% @ +10 dBu

.115% @ +36 dBu

Bandwidth (1kHz, 600 unbalanced source, unweighted): 10Hz to 30kHz

Output Section

Max Output Level: +28dBu

Output Impedance: 600

Power Supply

+/- 15v (lunchbox supply)

Product Dimensions

1.5" x 6.5" x 5.25"

Product Weight

.8 lbs

Shipping Dimensions

13" x 13" x 5"

Shipping Weight

3 lbs