High-voltage Class A 12AX7 vacuum-tube mic/instrument preamplifier Gain, Tube ...High-voltage Class A 12AX7 vacuum-tube mic/instrument preamplifier Gain, Tube Drive, HP filter, -20 dB pad, phantom power, polarity reverse3-band EQ features variable-Q on mid-band w/ peak/shelving on high- and low-bands Variable VCA compressor with...mehr