Harkening back to the vintage Supro Reverb combos of the '60s, the 1648RT Saturn Reverb offers both the original sound and design with modern updates. Its pair of 6973 tubes and 5U4 tube rectifier brings on the breakup you've come to expect from Supro amps. The Saturn helps you precision shape your tone and overdrive with simple controls, oftentimes only using the Volume knob. You can shape EQ with the Treble and Bass knobs and build the perfect tremolo or reverb using the Verb, Speed, and Depth knobs. Even cranked all the way up, you won't lose the warm, smooth tube sound this amp is known for.