Dimensions, weight: 74(W)×124(D)54(H)mm, 610g. The ST9Pro+ (Super Tube) is a rebirth of the original ST9 with a new circuit. The ST9Pro+ (Super Tube) is a reincarnation of the original ST9 with a new circuitry and a midrange boost control that reproduces the powerful, massive sound of a stack of amps. The drive control allows for a wide range of settings, from booster-like settings to blues and hard rock sounds.A new two-pair diode clip and low-frequency boost circuit are included for even more powerful distortion and low-frequency boost. The internal operating voltage can be selected between 9V and stabilized 18V. The new circuit boosts the voltage to 18V with an internal DC/DC converter only when 18V is selected. When 9V is selected, the internal DC/DC converter does not operate at all, and the circuit operates with the voltage supplied directly from the battery or AC adapter.
When batteries are used, the internal DC/DC converter does not operate, and the batteries will last longer. The internal operating voltage of 18V provides sufficient dynamic headroom and greatly reduces unintentional distortion, resulting in a stable, high-quality sound at all times. TBS (True Bypass Switching) with 4PDT mechanical switch. When bypassed, the TBS is completely bypassed without passing through any electronic circuits. Even during effects, the sound quality is not degraded because it does not pass through any electronic switching circuits.
The TBS is highly supported by many musicians and guitarists. Weekends are not available because post office is closed.
International Buyers - Please Note. Please note the voltage, etc.