![]() And while many companies have "borrowed" these groundbreaking design concepts over the years, few have been able to match Maxon's ingenuity, determination and longevity on their own. Our quest led us to many firsts in the industry the first realistic tube-amp overdrive the first compact analog delay the first multi-effect unit the first programmable effect the list goes on. Our relentless pursuit of perfection met many obstacles over the years, but like anyone committed to a cause, Maxon kept their sights focused on the ultimate goal to build the highest quality audio products possible. Early on our engineers realized that anything could be built faster and cheaper, but to build something better was the true mark of a master. ![]() Since their beginning in the late 1960s, Maxon has built their reputation on a single concept quality. Three selectable Filter types (Hi Pass, Band Pass, and Low Pass) and a frequency range of 100 Hz - 4 KHz allow the AF-9 to function with virtually any instrument or input signal.įrom simple wah-wah's to outer-space noises, the AF-9 provides the most desirable swept filter effects in a compact, user-friendly package. ![]() 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. 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). 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. 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 AF-9 Auto Filter represents the state-of-the art in analog filtering. 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. Envelope filters are wah-wah type sliding filters that are triggered by an input voltage. 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. ![]()
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