AF9 Auto Filter

The Maxon AF9 Auto Filter is a versatile auto-wah and swept filter pedal designed for ease of use in a compact format. It utilizes opto-coupler circuitry to deliver smooth, vintage-style filtering that mimics classic effects. Musically, the AF9 offers a range of sounds from subtle to pronounced, allowing for dynamic modulation that responds to your playing style. The pedal features Threshold and Peak sliders to adjust the effect's intensity, as well as Range and Drive switches to control the filter sweep's span and direction. With three selectable filter types—Low Pass, Band Pass, and Hi Pass—and a frequency range from 100 Hz to 4 kHz, the AF9 is suitable for a wide variety of instruments and signals.