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.
Mic Section
Max Microphone Input Level: +1dBuInput Impedance: 200Pad: 10dBGain (no pad): +26dB to +70dBEquivalent Input Noise (noise floor): -120dBTHD+N:
.01% @ +26dB Gain
.011% @ +40dB Gain
.049% @ +60dB Gain
.15% @ +70dB GainBandwidth (1kHz, 150 source, unweighted): 10Hz to 30kHz
D.I. Section
Max D.I. Input Level: +18dBuInput Impedance: 500kPad: noneGain: +10dB to +53dBEquivalent Input Noise (noise floor): -102dBTHD+N:
.008% @ +10dB Gain
.01% @ +25dB Gain
.03% @ +40dB Gain
.14% @ +53dB Gain
Bandwidth (1kHz, 600 unbalanced source, unweighted): 10Hz to 30kHz
Output Section
Max Output Level: +28dBuOutput Impedance: 600Power Supply: 24VAC, 500mA External SupplyProduct Dimensions: 9.5" x 6.5" x 1.75"Product Weight: 3.2 lbsShipping Dimensions: 13" x 11" x 5"Shipping Weight: 5.5 lbs