With its single knob and switch, the PT999 Phase Tone is deceptively simple. Yet packed into this tiny blue box are a host of the most authentic 70's era phasing effects available in a current production unit. Simply by adjusting the unit's Rate control a wide variety of expressive phasing nuances can be coaxed from the PT999, all of them whisper quiet and amazingly transparent. The PT999's minimalist circuit frees your guitar tone to be as smooth and responsive as it is when served up a la carte (or a la effect, as the case may be).
PT999 Phase Tone page at Maxon 's website...