The Eventide Clockworks PS-101 is a vintage analog phaser modulation effect unit used by many great artists such as Led Zeppelin.

The Eventide Clockworks PS-101 Phaser was manufactured from 1971 through to 1977 and offers a tremendous level of versatility. These units are legendary and quite hard to find in their original form.

In addition to standard modulated phasing, it can be configured to dial in specific effects and controls, with some functions also having been designed to manipulate voltages from early modular synthesizers for creative effects.

The PS-101 was used on Led Zeppelin's famous "Kashmir" and many other hit songs, and has a deep, analogue-phase tone effect.

Great for guitars, synths and keys but their is no limit to artistic creativity with this legend.

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