Second Hand. The Vintage Octa Screamer pedal is not for the faint at heart! It recreates the famous and instantly recognizable octave doubling effect immortalized by Jimi Hendrix. The Vintage Octa Screamer is based on a unique new circuit design that greatly improves the octave up effect and doesn't kill sustain and overtones like other octavia pedals are prone to do. Use the mix knob to blend in the octave effect and transform the pedal from a full-blown octavia to a fuzz... and everything in between. The built-in 30 dB treble boost features a specially tuned filter circuit that pushes the octave effect to new extremes. Activate the effect pedal to generate screaming overtones from outer space and blast your tone beyond the stratosphere.