Tube Zipper

Description

Exalted American effect pedal manufacturer, Electro‑Harmonix introduced the Zipper onto an unsuspecting world in early 1977 and ended production in early 1980. Electro‑Harmonix was on quite a roll with envelope followers, as they also produced the smaller and simpler models, the Doctor Q and Y‑Triggered Filter (and later, the fabled Q‑Tron from the 1990s). The Zipper was the largest and most flexible of the original models, allowing greater fine tuning of the analog filter’s response to an input signal. The effect was designed for use with guitar, bass or keyboard, hence the low pass/band pass options. At its simplest, envelope filters are often referred to as ‘auto wahs’, frequently used to produce funky wah effects without the need for constant foot control. However, as the threshold of the filter is responsive to signal strength, the Zipper is capable of more subtle analog synth‑like sound effects. One interesting aspect of the pedal, there must be a battery in the unit even if you chose to use the power jack. It actually states this in the manuel. Condition: Excellent, this is one of the cleanest vintage pedals I've seen in a long time. It's been recently serviced and my tech put the labels on the power port and made a note on the pedal about the need for a battery. They're just stickers and can be removed. The box and manual are included.FeaturesThe ‘Range’ knob controls the frequency range over which the filter sweepsThe ‘Q’ knob controls the intensity of the filter relative to signal strengthThe ‘Attack’ toggle switch actually controls the speed at which the filter sweep returns after being triggered – ‘1’ moderately fast and ‘2’ rapidThe ‘LP/BP’ EQ slide switch attenuates high frequencies (Low Pass) or both high and low frequencies (Band Pass)Standard footswitch turns the effect on and offStandard ¼” input and output mono jack socketsNo LED status indicator9V DC power supply input or 9V batteryNo battery compartment in the base of the unitPhillips screws on the top of the pedalBox and paperwork included

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