Brand

Keeley Electronics

Robert Keeley began by modifying effects for guitarists and built the first Keeley Compressor while pursuing more useful control over dynamics and sustain. The Oklahoma City company now designs, builds, tests and refines its effects there, with a range spanning compression, overdrive, fuzz, pitch, delay and reverb. The Compressor remains its best-known family. JustPedals listings also include the Mk3 Driver, Octa Psi pitch shifter and fuzz, Manis overdrive and Nocturne reverb. Keeley’s work often adds practical controls to familiar circuit ideas, such as pickup-sensitive release settings on its compressor pedals.

Category

Overdrive Pedals

Overdrive uses soft or moderate clipping to add harmonics and compression while retaining more of the original note shape than heavy distortion. Some circuits emphasise the midrange and trim bass before clipping; others remain broad, transparent or amplifier-like. Gain, clipping arrangement, headroom and tone filtering decide whether it supplies a light edge, a saturated drive sound or extra push into another gain stage.

Tags

Bass

Voiced or equipped to retain low-frequency fundamentals and the higher headroom of a bass signal. Clean blends, crossovers and bass-specific filter ranges can preserve weight and articulation while the effected portion adds harmonics, movement or ambience.

Buffered Bypass

Keeps an active buffer in the signal path when the effect is bypassed. The buffer converts a high-impedance input to a lower-impedance output, helping long cables and multiple pedals retain level and high frequencies, although its headroom and noise remain part of the path.

True Bypass

Connects input directly to output through mechanical or relay switching when the effect is off, removing the active circuit from the audio path. It avoids buffer colour but leaves cable capacitance and switching design to influence high-frequency loss and possible switching noise.