All-tube combo amplifier for electric guitar that provides the huge, bold sound of the Thunderbolt amp, but with addition of lush, all-tube reverb. It is loaded with independent bass and treble controls, six-spring long-pan reverb and switchable power. The 35-Watt Class A (Cathode Bias) mode delivers a more spongy, vintage character while the 60-Watt Class AB (Grid Bias) mode delivers faster transient response with maximum available headroom and volume. The unique power amp topology not only allows for players to change the texture and output volume of the amp but it also provides two very different, all-tube tremolo effects depending on whether Class A (cathode bias) or Class AB (grid bias) mode is selected. The cathode bias tremolo is vintage Valco/Supro all the way, where the overall depth of the effect changes along with the dynamics of your playing. The grid bias tremolo is gives a much deeper, stronger and more pronounced throbbing effect. Since the tremolo is performed by modulating the bias of the output tubes, the reverb necessarily comes before the tremolo effect, for a mesmerizing combination of pure tube reverb and tremolo when both effects are combined. The combo uses a custom USA made 15” driver TB15 with a full, broadband sound that is never muddy. It was designed in collaboration with Eminence to combine the best elements of vintage 15” speakers (Jensen C15PS & JBL D130) with modern construction methods and materials to achieve a vintage voiced driver with superior power handling and juicy bottom end. Dimensions: 600 x 410 x 270 mm. Weight: 24 kg.