Electro Harmonix Octave Multiplexer Guitar Effects Pedal

Product ID: 60346

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  • Create very smooth and natural bass tones one octave below your played note
  • True bypass ensures total clarity without tone colouration
  • Sub-octave is switch-selectable for greater versatility
  • Hi and low filter controls let you tailor the perfect bass tone
  • Pedalboard-friendly design slots into any setup perfectly
  • Tough and compact die-cast chassis makes this perfect for touring artists
  • Includes 9-volt battery but can be powered by 9-Volt power supply
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Delivery to UK mainland addresses* is FREE on orders over £75 and up to 30kg. (As a guide, a standard electric guitar weighs approx. 3-5kg).

Delivery on orders below £75 are charged at £4.45!

Delivery to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isle of Wight and Channel Islands is weight dependant and will be indicated at the checkout

Delivery above 30kg to ANY location will vary according to weight and will be indicated at the checkout

LocationPriceStandard Delivery
UK mainland* FREE on orders over £75 £4.45 on orders under £75 1-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands £12.95 – any order value up to 30kg Over 30kg - please call 1-3 working days
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The Electro Harmonix Octave Multiplexer Guitar Effects Pedal is a classic '70s pedal hailed by many for its unique character and deep down and dirty tones. Whether you play guitar, bass, or perform vocals, the Octave Multiplexer allows you to beef up your tone with some sub-octave power.

Monophonic monster

The Octave Multiplexer is a monophonic monster, which handles single notes like a champ. If you're playing low-end notes, it allows you to dig even deeper to produce some bone-shaking sub-octave energy. If you're playing mid to high frequency notes, then this little beauty will pull out some delightfully gnarly fuzz tones that are perfect for those that like to rock.

Concise control

The control layout is delightfully simple with High Filter, Blend, Bass Filter, Sub Switch and Bypass Footswitch. The High Filter adjust the shape of the tone with regard to the sub-octaves higher frequency harmonics. Turn this clockwise to produce a snarling, raspy fuzz. The Bass Filter adjust the sub-octaves fundamental and lower frequency harmonics, and you might have guessed, the more clockwise the dial, the fatter and denser your bass tone.

The Sub Switch turns the Bass Filter on or off, so that when it is switched off then only the high pass filter is active. The Blend pot is a straight up wet/dry control: counter-clockwise is 100% dry, clockwise is 100% wet - it couldn't be simpler!


The instrument input takes in your guitar/bass/mic/whatever you want if it is via 1/4-inch jack, then you can output both a dry signal (which is connected directly to the input jack), and an effected signal. Splitting the outputs offers you greater signal routing opportunities, depending on how elaborate your pedalboard arrangement is. You'll be pleased to know that the Multiplexer comes in a more compact form than its predecessor, and slips into any setup nicely.

As we've come to expect from the team at EHX, the Octave Multiplexer Guitar Effects Pedal is built like a tank and ready to do your bidding as soon as it arrives. Included with the pedal is a 9V battery, but it can also be powered by a 9V power supply.

ManufacturerElectro Harmonix
ModelOctave Multiplexer Guitar Effects Pedal
Dimensions (H x W x D) 89 x 121 x 102 mm
ControlsHigh Filter, Blend, Bass Filter, Sub On/Off Switch, Bypass Footswitch
Connectivity Inputs: Input
Outputs: Dry Out; Effect Out
9V DC Input
Included Accessories9-Volt Battery

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