Vintage PH350-U

In addition to the standard Rate and Depth controls to vary speed and intensity of the phasing effect, the PH-350 also features switchable four, six, and ten stage phasing. As the phasing stages increase, the effect becomes more dramatic as focus is placed on the upper register harmonics. By changing the amount of phasing stages the PH-350 can emulate a wide variety of phase shifters, from classic units of the 1970’s all the way to modern-day models.

Like the CS-550, the PH-350’s third rotary control is its secret weapon. The PH-350’s Feedback control features a center-detent at 12 o’clock which allows for both positive-phase and negative-phase feedback. Positive-phase feedback works in the standard way to increase the peak points of the phase signal as the control is turned clockwise. Negative-phase feedback works by “breaking” the peak points of the phase signal and “dephasing” the original signal. The resulting reversed-phase signal is delayed slightly from the original, creating a dramatic “scooped” effect unique to the PH-350. The Feedback control is calibrated to reach self-oscillation at either extreme, yielding a further array of bizarre oscillation effects.

Lastly, the PH-350’s stereo outputs allow panning of the effect between two amplifiers or channels. The PH-350’s ultra-wide frequency response and low noise allow it to process line level signals as well as standard instrument signals.