A "HEX E828 Harmonic Exciter" from PMP (Professional Music Products), a brand that existed in the 80s. This is a rather rare effects pedal. It features Frequency and Q controls, allowing you to boost the harmonics in the desired frequency range. It's perfect for creating sharp attack sounds and a glossy sound. The metal body has a mysterious, cool shape, but it's not an effects pedal that drastically changes the sound. Instead, it seems to be used to finely adjust the sound's resonance. Depending on the FREQ and Q settings, it can self-oscillate like an oscillator, making it suitable for experimental music or more niche applications like noise music. It might also be useful for those who want to use enhancers and exciters to manipulate sounds analog-style in their DTM (Desktop Music) work, helping them create original sounds. It could also be an effects pedal for those who are particular about guitar sounds and want to record and master them meticulously. Operation has been confirmed with no crackling or noise. The condition is quite clean. I am also selling vintage effects pedals as I organize my equipment. #exciter #effectspedal #enhancer #guitar