Class A 12AX7 vacuum-tube mic/instrument preamplifier with Tube Drive control
Gain control with +10 dB to +54 dB gain range
48V phantom power switch, 80 Hz high-pass filter, -20 dB pad, and Polarity-reverse switch
Fully Variable VCA compressor with Attack, Release, Ratio, Threshold, and (makeup) Gain; Auto Attack/Release switch; Soft/Hard Knee switch; and Bypass switch
3-band parametric equalizer with Gain, Frequency and Q controls (mid band); Gain and Frequency controls and Shelving/Peak switches (low and high bands); switchable pre-/post-compressor; Bypass switch
Backlit VU meter with Gain Reduction to Meter switch (gain reduction or output gain)
1 unbalanced ¼-inch instrument input (front panel), 1 balanced ¼-inch line input, and 1 balanced XLR mic input