The combos are equipped with a Jensen speakers, while the piggyback cab (which boasts a removable backside “plug”) is loaded with a 12″ Jensen Ceramic Classic Clone. The Single’s OT is the physical size of one in a 50-watt Marshall. GT says one major key to the amp’s tone and bass response – and its ability to use so many tubes without sacrificing tone – is its huge triple-tapped output transformer with an impedance selector (4/8/16-ohm). Rather, it filters them, which means a user can adjust tones based on what they hear, rather than what the knob is telling them. The tone section does not boost or cut frequencies. The head and combo share certain features, including black tolex cabinets with tan grillecloth, chrome chassis, black Bakelite knobs, and a chromed steel emblem.Ĭontrols are also shared and include passive bass, mid, and high tone knobs, as well as presence, gain (with footswitchable pull boost), master volume, and an effects loop blend control.
Its output, depending on the power tube used, ranges from seven to 15 watts. “Single” refers to the number of output tubes sported by the amp in its five configurations – a 1×10 combo, a 1×12 combo, a Top Cab, the LapTop model, with its two 4″ Auratone speakers in a top-grill baffleboard, and a 1×12 piggyback.Ĭapable of employing one of 25 output tubes ranging from EL84 to KT66 without having to modify or re-bias the amp, the Soul-O Single is a sweet studio or live amp. The new member of GT’s family is the Soul-O Single. The latest outgrowth of Pittman’s passion for tubes and their many tones is his company’s new class A all-tube single-ended guitar amps designed for those of us who may be amp tweakers at heart, but don’t have the skills, time, or hardcore desire to build or buy amps that use different tube types. For 24 years, he has listened to, tested, designed, and manufactured many variants of the familiar glass bottles that melt the hearts of guitar tone aficionados.
Groove Tubes founder Aspen Pittman is a tube connoisseur.
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