The SP-1 is a unique switching expression pedal with two output jacks, one for the expression pedal and one for the switch. The switch is operated by pushing down on the front with your foot in the same way as a traditional wah pedal. This is used to turn a pedal driven effect such as a wah or vibrato on an off at the pedal itself. The SP-1 is compatible with most MIDI controllers and processors with two or more pedal jacks. The SP1-R option adds a polarity reversal capability. This is a mini toggle switch that reverses the polarity of the potentiometer for compatibility with devices that require a reversed polarity.
The SP-1 and SP1-R can be fitted with an optional LED to indicate latched and unlatched state. This can be used as an effect on/off indicator. The SP-1 is a passive device; no battery or external power is required unless the LED option is added. The LED is powered by an internal 9v battery (included), accessible via a base mounted battery door.
Merkki Mission Engineering