The unit mounts horizontally to the floor of a cabinet with the open side down. Used in Prosonic™, Showman 50, '94 Twin, Custom Vibrolux Reverb®, Custom Vibrasonic, Pro Tube Series, '63 Vibroverb, '65 Twin Reverb®, '65 Deluxe Reverb®, '65 Super Reverb®, '65 Twin Custom®, Vibro-King®, Dual Professional, Super-Sonic™ Series, '64 Vibroverb, Princeton® Recording Amp, and '65 Princeton Reverb® amplifiers manufactured from 1991-Present.
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