Supro 1624T Dual Tone 1x12 - UsedSupro 1624T Dual Tone in Very Good Condition. The 1624T Dual Tone was one of the three initial vintage reissues rolled out by the new Supro Amplifiers, now produced by Pigtronix in New York. This 24 watt, 1x12 combo features two blendable channels, each on their own volume and tone circuit, and the unmistakable Supro tremolo, which is footswitchable. 6973 power tubes are what set this amp apart from the rest in the new Supro line. These output tubes