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Catalinbread Perseus DIO Sub-Octave Synth/Fuzz Pedal

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Music Den Price: $184.99
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Catalinbread Perseus DIO Sub-Octave Synth/Fuzz Pedal
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Fewer things give guitarists that fabled “riff face” more than a fuzz mixed with an analog octave down, and our original Perseus was a trailblazer in that regard. With that said, the Perseus Dio is a rightful successor to that box. The Perseus Dio greatly expands on the concept of our original device, giving you a three-voice all-analog octave down device with adjustable octave filters. Three knobs control the mixer section, giving you one octave down, two octaves down, and a dry, boosted distortion. The Dry knob gives you a really great light distortion sound that’s more than capable of pushing your amp into overdrive, but the fun starts when you control the levels of octave down signals with their accompanying low-pass filters. With no filtering, the octaves are harmonically rich square waves that sound like old-school Nintendo, but turning up their accompanying filter knobs smooth out the harmonics and turn into clean octaves down. Let’s get pixelated. 


DOWN 1: Controls the volume level of the 1-octave-down signal. Both this and the 2 Down control have been tuned to provide the best possible tracking across all positions on the fretboard.

FILTER 1: This control governs the cutoff point for a second-order low-pass filter on the 1 Down knob. At minimum, the cutoff point is ~7KHz, retaining all the harmonic richness and video game-esque qualities. At maximum, the cutoff point is ~280Hz, giving you a clean octave down with bubbling harmonics lying underneath.

DRY: This knob controls the volume of the dry signal. It is not your true clean guitar signal, but rather a boosted version of it, allowing it to mix better with the octaves. There’s plenty of volume on tap and it sounds great just by itself.

DOWN 2: Just like Down 1, Down 2 controls the level of the 2-octave-down signal.

FILTER 2: This control governs the cutoff point for a deeper second-order low-pass filter on the Down 2 knob. At minimum, the cutoff point is ~7KHz, just like “1 Filter.” However, at maximum, the cutoff point is ~140Hz to really let the “oomph” shine through at higher settings.

Delivery & Returns

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The Music Den wants you to be fully satisfied with your purchase. The Music Den has a cash back return policy for all online returns 30 days from the date of sale. (Note: This does not apply to Reverb. Please see Reverb for their specific policies. For In-store purchases please refer to your receipt.) Please read the items below carefully to ensure that your Item Return is done correctly.


To return an item purchased online from, you must notify The Music Den within 30 days from the date of the sale to receive an RA#.

All returns must have an RA# (Return Authorization Number). To receive an RA#, Please call 1-800-479-1189 or click here to send us an email. Do not forget to mention your customer number and order number so that we can expedite your request.


All Returns must be received by the Music Den within 10 days of the day you received the RA#.


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The Music Den
1030 Route 10 West
Randolph, NJ 07869


For answers to any questions about our return policy, please call 1-800-479-1189 or click here to send us an email.

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