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Featuring the iconic, sturdy Boss enclosure and streamlined controls for rate, resonance and depth, the Boss PH-1R Phaser gives a striking but tasteful phased analog edge to your tone. Capable of adding a completely phased sound or low-end presence all without adding noise to your signal, the PH-1R is great for psychedelia, stoner rock, or garage.

This was an updated version of the original PH-1. It had an additional “Resonance” knob (feedback control) to increase the tonal variations. This is a 4 stage phaser like the PH-1 and its biggest competitor at the time, the MXR Phase 90. It can create a wide array of different tones.

Specifications

Controls: Rate, Resonance, Depth

Connectors: Input, Output, AC Adaptor

Current Draw: 11 mA (DC 9V)

Weight: 400 g (.88 lbs)

Input Impedance: 470kOhm

Signal/Noise Ratio: Over 90dB (IHF-A)

Recommended Load Impedance: Over 10kOhm

LFO Speed: 100 ms ~ 16 s

Manual

Download Manual