Black Lion Audio B12A MKII, Single Channel Mic Preamp / DI

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.

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

Output: balanced, line-level TRS output
Input: balanced, mic-level XLR input
GND: internal chassis ground
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)