Here is an NOS, Mint amp! A great sounding and extremely versatile combo that features a pair of EL84s, a solid-state rectifier, and 3 very busy 12AX7s - one of which is the long-tail phase inverter while the other two take care of pre-amp, reverb send & return, and tremolo oscillator (tremolo is activated with the included footswitch). On the 17, the single gain stage (comprised only of 1/2 of a 12AX7) is controlled by the GAIN knob and the single TONE control, which together with a transparent post-phase inverter volume (we don't call it "master" here) offers a lot more flexibility that it would appear. The tone ranges from a bright-ish, harmonically complex chime, to a soft, approachably polite overdrive. This amp loves an overdrive pedal as well.