The Electro-Harmonix Bass Mono Synth is an Electro-Harmonix synth pedal, currently around $104.54. It pairs well with the Ampeg RB-110 and the Ampeg SVT-CL.
Electro-Harmonix Bass Mono Synth
Electro-Harmonix · pedal
The Electro-Harmonix Bass Mono Synth is a monophonic bass synthesizer pedal that packs eleven classic synth voices, transforming a bass guitar into vintage style monosynth tones without MIDI pickups or modifications. Using EHX's effective pitch tracking, it delivers huge, powerful basslines from classic fusion to progressive madness, covering synth bass, square and saw leads and other monophonic synth sounds. A SENS control tunes how playing dynamics trigger the synth, and a CTRL knob adjusts a key parameter for each voice. It suits bassists in funk, fusion, electronic, prog and pop who want instant access to a range of classic mono synth bass tones from their normal bass rig.
What stands out
“It delivers huge, powerful synth bass from fusion to prog, and setup is genuinely plug and play”
— from the reviews
“Bassists value the Bass Mono Synth for bringing eleven classic mono synth voices to a standard bass with”
— from the community notes
“Using EHX's effective pitch tracking, it delivers huge, powerful basslines from classic fusion to progressive madness, covering synth bass, square and saw leads and other monophonic synth sounds”
— from the listing
“prog and pop who want instant access to a range of classic mono synth bass tones from their normal bass rig”
— from the listing
“A SENS control tunes how playing dynamics trigger the synth, and a CTRL knob adjusts a key parameter for each voice”
— from the listing
- synth
- bass
- tracking
- fusion
- mono
- pitch
- prog
- dynamic
Price updated Oct 24, 2026
Genres the Electro-Harmonix Bass Mono Synth is commonly used in
- Funk
- Electronic
- Experimental
- Rock
Amps that pair well with the Electro-Harmonix Bass Mono Synth
Ampeg RB-110
Ampeg
16% matchshapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (dynamic → compressed)
The Bass Mono Synth's tracking stays clean through the RB-110's practice-level preamp instead of getting lost at headphone volume.
Comes later in the signal chain
Ampeg SVT-CL
Ampeg
15% matchshapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (dynamic → compressed)
Into the SVT-CL's growling tube stage, the Bass Mono Synth's tracking stays defined instead of getting lost.
Comes later in the signal chain
Ceriatone British Style 2525
Ceriatone
tonal matchComes later in the signal chain
Ceriatone British Style 2525 leans this dynamic tone toward compressed, which it doesn't make on its own
Vox AC30S1 OneTwelve 30W 1x12 Combo
Vox
tonal matchComes later in the signal chain
Vox AC30S1 OneTwelve 30W 1x12 Combo leans this dynamic tone toward compressed, which it doesn't make on its own
Fryette Power Station 100
Fryette
tonal matchComes later in the signal chain
Into a dynamic tone, Fryette Power Station 100 brings a pull toward compressed that's missing
Kustom HV30 Tube
Kustom
tonal matchComes later in the signal chain
Into a dynamic tone, Kustom HV30 Tube brings a pull toward compressed that's missing
Mesa/Boogie Stiletto Deuce Stage II
Mesa Boogie
tonal matchComes later in the signal chain
Into a dynamic tone, Mesa/Boogie Stiletto Deuce Stage II brings a pull toward compressed that's missing
Friedman PT-20
Friedman
tonal matchComes later in the signal chain
Into a dynamic tone, Friedman PT-20 brings a pull toward compressed that's missing
Pedals that stack with the Electro-Harmonix Bass Mono Synth
Origin Effects RevivalDrive
Origin Effects
25% matchshapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (dynamic → compressed)
Origin Effects RevivalDrive leans this dynamic tone toward compressed, which it doesn't make on its own
Comes later in the signal chain
J. Rockett Archer Ikon
J Rockett
23% matchshapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (dynamic → compressed)
J. Rockett Archer Ikon leans this dynamic tone toward compressed, which it doesn't make on its own
Comes later in the signal chain
JHS Lucky Cat Delay limited edition
JHS Pedals
12% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
JHS Lucky Cat Delay limited edition's pristine voice goes after Electro-Harmonix Bass Mono Synth in the signal chain — it's not there to compete with Electro-Harmonix Bass Mono Synth's own dynamic character — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Echoplex EP-3
Echoplex
11% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Keep Echoplex EP-3 after Electro-Harmonix Bass Mono Synth in the signal chain, where it won't crowd Electro-Harmonix Bass Mono Synth — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
DigiTech DOD Compressor 280
Digitech
tonal matchComes earlier in the signal chain
Into a dynamic tone, DigiTech DOD Compressor 280 brings a pull toward compressed that's missing
DigiTech XBS Bass Squeeze
Digitech
tonal matchComes earlier in the signal chain
Into a dynamic tone, DigiTech XBS Bass Squeeze brings a pull toward compressed that's missing
Fairfield Circuitry 20% More
Fairfield Circuitry
tonal matchComes later in the signal chain
Into a dynamic tone, Fairfield Circuitry 20% More brings a pull toward compressed that's missing
Tech 21 CompTortion
Tech 21
tonal matchComes later in the signal chain
Tech 21 CompTortion leans this dynamic tone toward compressed, which it doesn't make on its own
Questions people ask
What pairs well with the Electro-Harmonix Bass Mono Synth?+
Strong matches from rig and tone-complementarity evidence: Ampeg RB-110, Ampeg SVT-CL, Ceriatone British Style 2525 — The Bass Mono Synth's tracking stays clean through the RB-110's practice-level preamp instead of getting lost at headphone volume..
How much does the Electro-Harmonix Bass Mono Synth cost?+
Around $104.54 (live listing price, updated Oct 24, 2026).