The Electro-Harmonix Lester K Stereo Rotary Speaker is an Electro-Harmonix rotary pedal, currently around $130.60. Close alternatives include the Maxon ASC-10 and the Source Audio Gemini Chorus. It pairs well with the PRS Archon and the Marshall Silver Jubilee 25/55 100W Amp Head.
Electro-Harmonix Lester K Stereo Rotary Speaker
Electro-Harmonix · pedal
The Electro-Harmonix Lester K Stereo Rotary Speaker is a compact stereo rotary speaker simulator from Electro-Harmonix, delivering Leslie-style spinning speaker simulation in true stereo with Slow and Fast rotor modes. Controls include Slow Rate, Fast Rate, Ramp Time (acceleration speed), and a Speed switch for toggling between Slow and Fast rotor speeds. The Lester K produces the Doppler-shifted, swirling stereo rotary speaker character of a Leslie cabinet in a compact EHX enclosure.
What stands out
“The Electro-Harmonix Lester K Stereo Rotary Speaker is a compact stereo rotary speaker simulator from Electro-Harmonix, delivering Leslie-style spinning speaker simulation in true stereo with Slow and Fast rotor modes”
— from the listing
“The Lester K produces the Doppler-shifted, swirling stereo rotary speaker character of a Leslie cabinet in a compact EHX enclosure”
— from the listing
“The Lester K delivers stereo Leslie-style rotary speaker simulation with Slow and Fast modes and adjustable Ramp Time for controlling acceleration speed between rotor modes, suited for organ, keys, and players who want authentic rotary spea…”
— from the community notes
“Use-case wise it suits organ-style, classic rock, and ambient players who want stereo rotary speaker simulation in a compact pedal”
— from the community notes
“Stereo output delivers wide, Doppler-shifted rotary speaker spread”
— from the reviews
Trade-offs
“In the signal chain rotary simulation sits after drive and before reverb”
— from the community notes
- stereo
- realistic rotor acceleration character
- classic rock
- ambient
- compact ehx enclosure
- adjustable ramp time
- stereo rotary speaker simulation
- stereo output
Good for
- Silent Recording
- Silent Stage
Price updated Oct 25, 2026
Genres the Electro-Harmonix Lester K Stereo Rotary Speaker is commonly used in
- Classic Rock
- Ambient
Amps that pair well with the Electro-Harmonix Lester K Stereo Rotary Speaker
PRS Archon
PRS
8% matchWhat PRS Archon brings here leans toward transparent — that's worth building a pairing around
Comes later in the signal chain
Marshall Silver Jubilee 25/55 100W Amp Head
amplifier
8% matchMarshall Silver Jubilee 25/55 100W Amp Head leans toward dynamic, and that's a real, usable character to pair with
Comes later in the signal chain
Pedals that stack with the Electro-Harmonix Lester K Stereo Rotary Speaker
Benson Amps Stonk BOX
Benson Amps
6% matchBenson Amps Stonk BOX leans toward germanium, and that's a real, usable character to pair with
Comes earlier in the signal chain
Colorsound Power Boost
Colorsound
6% matchColorsound Power Boost's own bright character is the real reason this is worth trying
Comes earlier in the signal chain
Crazy Tube Circuits White Whale
Crazy Tube Circuits
5% matchRun Crazy Tube Circuits White Whale after Electro-Harmonix Lester K Stereo Rotary Speaker in the signal chain, where it won't crowd Electro-Harmonix Lester K Stereo Rotary Speaker — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Cusack Music Delay TME
Cusack Music
5% matchRun Cusack Music Delay TME after Electro-Harmonix Lester K Stereo Rotary Speaker in the signal chain, where it won't crowd Electro-Harmonix Lester K Stereo Rotary Speaker — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Cheaper alternatives
Behringer UC200 Stereo Chorus
Behringer
58% similarityShared character: stereo output, stereo
DigiTech Multi Chorus
Digitech
55% similarityShared character: stereo, reverb, overdrive
TC Electronic Corona Chorus
TC Electronic
44% similarityShared character: stereo output, stereo, ambient
Boutique & premium upgrades
Fender The Pinwheel Rotary Speaker
Fender
64% similarityShared character: stereo, ambient, classic rock
Warm Audio WA-C1 Chorus and Vibrato
Warm Audio
58% similarityShared character: stereo output, stereo
Audiocade Stereo Pendulum Harmonic Panning Tremolo
Audiocade
58% similarityShared character: stereo, ambient
Beetronics Seabee Lite Harmochorus
Beetronics
53% similarityShared character: stereo, reverb
ThorpyFX Pulse Doppler
ThorpyFX
52% similarityShared character: stereo output, stereo, ambient
Maxon CS-550 Stereo Chorus
Maxon
51% similarityShared character: stereo
Similar charactersee all similar tone character →
Maxon ASC-10
Maxon
56% similarityShared character: stereo output, stereo, overdrive
Source Audio Gemini Chorus
Source Audio
53% similarityShared character: stereo, ambient, overdrive
MXR M134 Stereo Chorus
MXR
50% similarityShared character: stereo output, stereo, ambient
Roland CE-5 Chorus Ensemble
Roland
47% similarityShared character: stereo output, stereo, ambient
Behringer BM-18M Cluster Box
Behringer
45% similarityShared character: stereo
Electro-Harmonix Lester G
Electro-Harmonix
81% similaritysimilar tone character
See all alternatives to the Electro-Harmonix Lester K Stereo Rotary Speaker (cheaper + boutique) →
Questions people ask
What are good alternatives to the Electro-Harmonix Lester K Stereo Rotary Speaker?+
The closest matches in character are the Maxon ASC-10, the Source Audio Gemini Chorus, the MXR M134 Stereo Chorus. Budget picks: Behringer UC200 Stereo Chorus, DigiTech Multi Chorus, TC Electronic Corona Chorus. Boutique upgrades: Fender The Pinwheel Rotary Speaker, Warm Audio WA-C1 Chorus and Vibrato, Audiocade Stereo Pendulum Harmonic Panning Tremolo.
What pairs well with the Electro-Harmonix Lester K Stereo Rotary Speaker?+
Strong matches from rig and tone-complementarity evidence: PRS Archon, Marshall Silver Jubilee 25/55 100W Amp Head, Benson Amps Stonk BOX — What PRS Archon brings here leans toward transparent — that's worth building a pairing around.
How much does the Electro-Harmonix Lester K Stereo Rotary Speaker cost?+
Around $130.60 (live listing price, updated Oct 25, 2026).