Product Description
The Maxon AF-9 Auto Filter Auto-Wah pedal. FREE shipping in the USA!
You may have noticed that the Maxon AF-9 Auto Filter has undergone a facelift. Specifically, the Sensitivity & Peak faders have been replaced by rotary pots and the slider switches are now toggles. This change was made out of necessity due to the discontinuation of the fader pots that had been used on this model for nearly 40 years (original release date was 1981). While these changes may have been necessary, Maxon saw no reason to update the AF-9’s classic, watery, 3-dimensional filtering that so many players have to come to count on over the years. So, you can expect the latest version of this classic quacker to stand up to the original. While change may be inevitable, if it ain’t broke, then don’t fix it.
The Maxon AF9 Auto Filter takes the most desirable auto-wah and swept filter effects and offers them up in a compact, user-friendly package. Opto-coupler circuitry produces the shimmering, watery filtering of legendary vintage units. Threshold and Peak sliders control the degree of effect; while Range and Drive switches determine range and direction of the filter sweep. Three selectable filter types (Low Pass, Band Pass, and Hi Pass) and a frequency range of 100 Hz – 4 kHz allow the AF9 to function with virtually any instrument or input signal.
Originally introduced as a key component of analog synthesizers, envelope controlled filters came into prominence in the early 1970s with the release of the legendary Mutron III. Envelope filters are wah-wah type sliding filters that are triggered by an input voltage. Unlike standard wah pedals whose center frequency is controlled by moving a treadle, an envelope filter's center frequency is controlled by playing dynamics, allowing for an almost unlimited variety of effects based on expressive nuances in a player's performance.
The AF-9 Auto Filter represents the state-of-the art in analog filtering. Like the original Mutron III, the AF-9 uses a CdS Photocoupler (HTV #P873) rather than a VCA at the heart of its circuit. The unique sound of Photocoupler circuitry provides a liquid, shimmering, vowel-like filtering that cannot be produced with other components, giving the AF-9 superior sound quality with lower noise levels than the competition.
The AF-9's Threshold control determines when the effect will trigger, while the Peak control boosts the center frequency for more dramatic filtering (like a Resonance control on a synthesizer). Selectable Range control (Hi/Low) determines the overall tone of the AF-9, while the Drive (Up/Down) control determines the direction of the filter sweep. Three selectable Filter types (Hi Pass, Band Pass, and Low Pass) and a frequency range of 100 Hz Ð 4 KHz allow the AF-9 to function with virtually any instrument or input signal.
From simple wah-wah's to outer-space noises, the AF-9 provides the most desirable swept filter effects in a compact, user-friendly package
Specifications:
Input Impedance 500K Ohms
Input Jack 1/4 inch standard phone jack
Output Impedance 10K Ohms
Output Jack 1/4 inch standard phone jack
Output 1
Residual Noise -95 dB or less (input shorted IHF-A weighted)
Filter Frequency 100 Hz 2 KHz (Low) / 200 Hz 4 KHz (High)
Controls Sensitivity, Peak
Switch Normal/Effect (true bypass configuration), Filter LP/BP/HP, Drive Up/Down, Range High/Low
Power Supply 9V Manganese dry cell battery (6F22) or special AC adaptor
Power Voltage DC9 V (Battery) / DC10 V (AC-adaptor)
