The Fulltone 2B is a compact, clear boost pedal derived from the Boost channel of the FD3 pedal. The circuitry is packed into the smallest possible enclosure, measuring just 4.5 x 2.1 x 2.3 cm (11.43 x 5.334 x 5.842 cm). Battery operation is possible, and the IN, OUT, and DC power jacks are rear-mounted for space-saving operation. The average modern pedalboard has eight or more pedals, with a lot of signal loss as it passes through them. A good booster not only adds volume for your solos, but also helps restore that lost gain, tone, and "touch." The premium JFET op amp eliminates the high-pitched top end shrillness that is common in other boosters. In addition, the JFET buffer buffers the signal even when the switch is turned off. Additionally, the DYNAMIC knob improves response, adds juiciness, and prevents distortion at the amp input. Spec Input impedance: 1.65MΩ Output impedance: 300Ω Dimensions: 11.43 x 5.334 x 5.842 cmLicensed by Jackson Audio.