The Electro-Harmonix Octave Multiplexer is an Electro-Harmonix octave pedal, currently around $150. Close alternatives include the TC Electronic Nether Octaver and the DOD Electronics Meatbox. It pairs well with the Ampeg SVT-CL and the Peavey MAX 100.
Electro-Harmonix Octave Multiplexer
Electro-Harmonix · pedal
The Electro-Harmonix Octave Multiplexer is a vintage sub-octave synthesizer pedal from Electro-Harmonix, generating one octave below the input guitar signal to produce bass-like sub-octave tones. The large-box format is the classic vintage Octave Multiplexer enclosure, producing a monophonic sub-octave through analog frequency division. Controls include Sub Bass, Bass, and Upper Bass controls for shaping the sub-octave tone and blend with the original guitar signal.
What stands out
“Sub Bass, Bass, and Upper Bass controls provide comprehensive sub-octave tone shaping”
— from the reviews
“Controls include Sub Bass, Bass, and Upper Bass controls for shaping the sub-octave tone and blend with the original guitar signal”
— from the listing
“producing a monophonic sub-octave through analog frequency division”
— from the listing
“The Octave Multiplexer Large Box delivers vintage sub-octave synthesis one octave below the guitar signal for bass-like sub-octave tones in the classic large-box EHX format, suited for bass simulation, organ-style bass doubling, and fat vin…”
— from the community notes
“Its standout weakness is the monophonic sub-octave tracking requiring single-note playing for accurate sub-octave generation”
— from the community notes
Trade-offs
“chords and complex voicings produce glitching”
— from the reviews
- octave
- sub
- bass
- frequency
- tracking
- fat
- vintage
Price updated Oct 23, 2026
Genres the Electro-Harmonix Octave Multiplexer is commonly used in
- Alternative Rock
- Experimental
cited
Inferred from shared tonal signals, not a stated genre tag. - Gospel
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Electro-Harmonix Octave Multiplexer
Ampeg SVT-CL
Ampeg
8% matchInto the SVT-CL's growling tube stage, the Octave Multiplexer's sub-octave layer stays defined.
Comes later in the signal chain
Peavey MAX 100
Peavey
8% matchPeavey MAX 100's own full character is the real reason this is worth trying
Comes later in the signal chain
Pedals that stack with the Electro-Harmonix Octave Multiplexer
Fulltone OCD
Fulltone
7% matchFulltone OCD leans toward full, and that's a real, usable character to pair with
Comes later in the signal chain
J. Rockett Archer
pedal
7% matchJ. Rockett Archer leans toward high headroom, and that's a real, usable character to pair with
Comes later in the signal chain
Meris LVX Delay
Meris
4% matchKeep Electro-Harmonix Octave Multiplexer's octave voice out front: Meris LVX Delay goes after Electro-Harmonix Octave Multiplexer in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Old Blood Noise Endeavors Dark Star V3
Old Blood Noise Endeavors
4% matchRun Old Blood Noise Endeavors Dark Star V3 after Electro-Harmonix Octave Multiplexer in the signal chain, where it won't crowd Electro-Harmonix Octave Multiplexer — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Cheaper alternatives
Boutique & premium upgrades
Similar charactersee all similar tone character →
TC Electronic Nether Octaver
TC Electronic
56% similarityShared character: tight tracking, one octave, signal chain
DOD Electronics Meatbox
Dod
46% similarityShared character: one octave, bass
Boss OC-2 Octave
Boss
95% similaritysimilar tone character
TC Electronic Sub 'N' Up Mini
TC Electronic
93% similaritysimilar tone character
Boss OC-5
Boss
93% similaritysimilar tone character
Hungry Robot The Monastery Octave Generator
Hungry Robot
92% similaritysimilar tone character
See all alternatives to the Electro-Harmonix Octave Multiplexer (cheaper + boutique) →
Questions people ask
What are good alternatives to the Electro-Harmonix Octave Multiplexer?+
The closest matches in character are the TC Electronic Nether Octaver, the DOD Electronics Meatbox, the Boss OC-2 Octave. Budget picks: Behringer Octave Divider. Boutique upgrades: Boss OC-2 Octaver.
What pairs well with the Electro-Harmonix Octave Multiplexer?+
Strong matches from rig and tone-complementarity evidence: Ampeg SVT-CL, Peavey MAX 100, Fulltone OCD — Into the SVT-CL's growling tube stage, the Octave Multiplexer's sub-octave layer stays defined..
How much does the Electro-Harmonix Octave Multiplexer cost?+
Around $150 (live listing price, updated Oct 23, 2026).