Keeley Electronics RK2000 Funk Siren Delay Pedal - Studio Gray

The Keeley Electronics RK2000 Funk Siren Delay pedal is a studio-quality stereo delay designed to bridge the gap between classic rackmount delay units and modern pedalboard functionality. Inspired by the swirling, tape-reel-style delay textures Trey Anastasio made iconic with Phish, it translates a once over-engineered 1980s rack effect into a compact, performance-ready format. Built around 12-bit digital delay, dramatic modulation, infinite hold, stereo signal paths and modern control options, it moves from subtle motion to the sweeping “funk siren” effect that defines its voice. With onboard presets, MIDI support, expression control and flexible bypass options, the RK2000 delivers that distinctive delay character in a format designed for modern rigs.

12-Bit Delay Character and Hold Function

The RK2000 centers on a 12-bit digital delay path that preserves the distinctive texture of its rackmount inspiration while fitting naturally into contemporary setups. Its Hold function captures the full delay buffer and sustains it for looping atmospheres, drone-like backdrops, or more experimental transitions, turning short phrases into playable layers rather than simple repeats. Combined with its modulation engine, this creates the animated, tape-reel-style movement that defines the pedal’s signature sound.

Modulation, Stereo Operation and Preset Functionality

Dramatic modulation is a defining part of the RK2000, ranging from subtle movement to aggressive pitch-bending sweeps and tape-style pitch shifts. Stereo inputs and outputs allow for wide delay imaging, including ping-pong and pitch-shifted effects in larger rigs. Tap tempo with selectable subdivisions keeps delay timing locked in, while five onboard presets and up to 127 MIDI-accessible presets make it easy to move between sounds in live or studio settings.

Hands-On Control Over Delay Behavior

The RK2000’s control layout is designed to shape not just delay time, but the character and movement of the repeats themselves. Blend and feedback adjust how the delay sits in your signal, from subtle ambience to sustained, evolving layers, while the filter control sculpts the tone of the repeats from darker, low-passed echoes to brighter, more present textures. Depth and rate work together to introduce pitch-based modulation, ranging from gentle tape-like flutter to more dramatic pitch shifts and warble. Lastly, the time control spans everything from near-instant doubling to extended delay intervals, giving you a wide range of rhythmic and atmospheric options within a single, intuitive interface.

MIDI, Expression and Performance Integration

Full MIDI implementation allows deep integration with advanced rigs, including preset recall and parameter control. Expression pedal support can be assigned to virtually any control, enabling real-time manipulation of delay time, modulation depth, or feedback. A remote switching input expands control over Hold and Mod functions, making it easier to access performance features without reaching for the pedal. Together, these options give the RK2000 a level of control that supports both structured use and more exploratory playing.

A Distinctive Delay Voice for Experimental and Ambient Players

True bypass or silent buffered bypass can be selected depending on rig needs, and the 9–18V power range adds flexibility for different pedalboard environments. Designed for players drawn to more expressive, ambient and improvisational delay textures, the Keeley Electronics RK2000 Funk Siren Delay offers a unique combination of vintage-inspired character and modern control in a format built for everyday use.