Roland AD-50 Double Beat
The Roland AD-50 Double Beat was a dual fuzz wah released in 1973. These were a popular effect for guitarists in the 70's and remains now one of the more collectable Roland pedals to be made.
The pedal is split into two sections (fuzz and wah) that can be used as standalone effects or together. The wah had a slight volume drop and was a little underwhelming for most, however the fuzz is a thick, juicy effect that created some huge sounds. The fuzz featured Sustain and Out Level knobs along with a 3-way switch called the Tone Selector, used to switch between three different waveforms for the clipping.
Wah PCB's - 052-026 on earlier models, 052-026A on revised models (based on the Crybaby wah.
Sustain Knob - 50kA on earlier models, 10kC on later models.
Some early versions also have reversed input and output jacks.