Need a boost? Let the Supro Boost give you a lift. This clean boost from Supro has a JFET base was designed to push the front end of your tube amp, but it doesn’t matter what you plug into; the Supro Boost will give you up to 20dB of clean gain regardless. But with the Boost, you don’t just get gain -- you get sonic contouring as well. Along with the oversized volume knob, the Boost sports a three-way toggle switch that gives you the chance to brighten up your sound, give it a darker vibe, or leave it flat with its switchable high- and low-pass filters. And for even more tweakability, the Supro Boost gives you an expression jack for the volume control, just in case you needed even more versatility.