Vox AC15 Hand-Wired Review

Channel Crossing

Given the microphonic tendencies of EF86 tubes, the switch to 12AX7s is an intriguing and practical move. Elsewhere among the tube complement, there’s a 12AT7 for the preamp and phase-inverter, two EL84s in the output stage for 15 watts RMS, and a GZ34 tube rectifier. It’s all housed in a classic Vox combo cab measuring 22 1/4"x23 1/4"x1 1/2".

The AC15 Hand-Wired’s normal channel has just a single knob for volume. But its voicing can be tweaked via a bright switch and the tone cut knob in the master section, and there’s also a boost switch to increase gain. The top boost channel features volume and dedicated treble and bass controls, but no boost or bright switch. Both channels have high and low inputs, and the latter can be handy for taming hot humbucker-equipped guitars.

The fine-tuning capabilities of the amp extend to the footswitchable, tube-driven, spring reverb circuit, which has a tone control in addition to its level, enabling you to fine-tune the frequency emphasis of the reverb itself. Send and return jacks for the effects loop—along with a bypass switch and a –10/+4 dB level switch for compatibility with both rack and pedal effects—are smartly positioned along the lower edge of the upper-back panel, rather than on the underside of the chassis. Dual speaker-outs have an impedance switch for 8- and 16-ohm operation. (The combo’s Vox-labeled Celestion Alnico Blue requires the latter.)

Vox was careful to reproduce the windings of a vintage AC15 output transformer circa 1963, which results in a heftier chunk of metal than you might expect in an amp this size. Vox makes up some of that weight by using slightly thinner plywood for the cabinet walls, which are just less than 1/2" in thickness—matching vintage specifications and, in Vox’s estimation, enhancing resonance and dimensionality. As with many AC15s past, the transformer and alnico speaker help push this new edition to 50 lbs, making for a surprisingly heavy combo of this size and output power. It might have been nice for Vox to slim things down. On the other hand, the amp might lose what turns out to be a strong, audible vintage spirit without those heavier design elements.