The first module available for the A-RACK 8+1 is the MA-1.5 True Class A Microphone Amplifier. All circuitry is real Class A discrete transistor using the Buzz Audio BE40 module. There are no transformers in the signal path, high quality film coupling capacitors are used for DC isolation. The circuitry is very similar to the MA-2.2 with the addition of the Solo feature and a Direct Drive Balanced Output circuit (the DDBO).
Bal Mode Min Gain = +22dB (+2dB with pad in)
Bal Mode Max Gain = +70dB
Unbal Mode Min Gain = +16dB (-4dB with pad in)
Unbal Mode Max Gain = +64dB
Maximum Output Level = +32dBu in Bal Mode, +24dBu Unbal Mode.
Frequency Response = 2Hz to 250kHz @ 20dB gain (-3dB).
= 20Hz to 250kHz @ 65dB gain (-3dB).
Harmonic Distortion = less than 0.008%100Hz to 10kHz.
Slew Rate = typically 140 V/uS, @ +20dBu output level.
EIN = -133.5dB A wtg, 150ohm source Z.
Signal to Noise Ratio = -74dB A wtg, input shorted.
CMNR = 100Hz-80dB, 1kHz -80dB, 10kHz-70dB internal trims.
Module to Module Crosstalk = below noise.
Input Impedance = 3k ohms/1k2 ohms switchable.
Controls = Gain, Solo, Mode, Mute, Input Impedance, 20dB Pad, Phase Reverse, Phantom pwr.
Indicators = Peak Level @ +18dBu (internally adjustable)
Connectors = In-XLR3F, Out-XLR3M.
Size = DIN 41612 standard 8 HP wide.
Power requirements = Must be fitted into A-RACK module rack bin.
