Jackson Audio Prism Buffer Boost Preamp EQ and Overdrive Fx Pedal Designed as the ultimate tone shaping tool for a player’s pedalboard, the PRISM is a buffer, boost, preamp, EQ, and overdrive all in one beautiful and compact stainless steel enclosure. As a boost/preamp, the PRISM contains three of the most distinct voices of boosts available. A transparent clean boost with no tonal coloring (TRANS), a boost that emulates a vacuum tube amp (AMP), and finally the boost circuit that started it all, the silicon treble booster (COLOR). These three circuits represent over 50 years of guitar effects from the earliest guitar pedal ever made to the more modern transparent voiced circuits. The PRISM is a true bypass pedal featuring our own silent switching circuitry and uses relays with a soft touch momentary contact footswitch to accomplish the bypass. We chose relay bypass because it is far more reliable than traditional mechanical true bypass methodologies and the relays themselves boast a lifespan of over 100,000 cycles