TWP10 Twin Peaks Wah
The Ibanez TWP10 Twin Peaks Wah has a different design from most wah-wah pedals. It uses two peak points at a higher and lower frequency to create the wah effect, instead of one peak point. It has dual inductor circuitry to achieve this. It also has a balance knob that can adjust the mix of the two frequency peaks, which can create different sounds.

BALANCE controls the mix ratio of the two peak levels created by the dual inductor circuit resonances. The higher frequency has a range similar to most wah-wah pedals. The lower frequency has a range closer to modified or signature wah-wah pedals. Turning the BALANCE control counter-clockwise makes the higher-frequency peak more prominent, while turning it clockwise makes the lower-frequency peak more prominent.

TONE mode switch selects the frequency range of the wah effect, HIGH or LOW. When TONE is set to HIGH The high-frequency resonance goes from 670Hz to 3kHz, which is a higher range than typical wah-wah pedals. When TONE is set to LOW frequency resonance sweeps from 300Hz to 1kHz, which is lower than most wah pedals.  When TONE is set to HIGH the lower frequency resonance goes from 440Hz to 2kHz. That range covers what is usually used on traditional wah-wah pedals. When TONE is set to LOW the lower frequency resonance goes from 220Hz to 750Hz.

Master LEVEL controls the output signal level. It has a unity gain at 12 o’clock and a +6dB boost at the maximum.