Red Panda

Red Panda Radius Ring Modulator

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Transform the timbre of your instrument in new, exciting ways!

The Red Panda Radius is a ring modulator and frequency shifter with pitch tracking and an advanced LFO.

It’s designed around a novel eight-quadrant multiplier algorithm that smoothly transitions from ring modulation to frequency shifting and allows different frequency ratios for the upper and lower tones.

Radius puts bell-like tones, metallic textures, frequency shifting, soft tremolo, and bubbly phaser sounds at your fingertips.

Radius is a musical ring modulator and frequency shifter that transforms the timbre of your instrument in exciting new ways!


Flexible modulation at your fingertips.

Radius’ deep features unlock a spectrum of timbres beyond traditional ring modulation!

Pitch tracking, a push-to-tune footswitch, and picking dynamics make Radius responsive and predictable on stage.

Radius has an advanced LFO with triangle, square, random waveforms and an 8-step sequencer, all of which can be envelope triggered.

The envelope follower makes it responsive to playing dynamics, and two X modulation waveforms create sweeping spectral changes.

Full MIDI implementation allows you to sync to MIDI clock, sequence parameter changes, and play the carrier oscillator from a keyboard.

With such advanced features and intuitive control, Radius modernizes classic electronic techniques for the future!


Red Panda Radius Ring Modulator pedal features:

• Stereo ring modulator and frequency shifter.

• Continuous mix between ring modulation and frequency shifting.

• Selectable 2X frequency ratios for upper and lower sidebands.

• Three carrier frequency ranges (low, high, quantized).

• Carrier frequency pitch tracking (monophonic, +/- 100%).

• Push-to-tune carrier oscillator.

• Multi-waveform LFO (triangle, square, random, intelligent random, X mod +/-).

• Step modulator (1-8 steps), programmable via front panel.

• Tap tempo and MIDI clock sync.

• Envelope follower.

• Envelope-triggered LFO (one-shot ramp, pulse, random, step mod).

• Presets (4 onboard, 100 via MIDI).

• Expression pedal assignable to any combination of knobs.

• Power: 9V DC.

• Current Draw: 200mA.

• Dimensions: 6" X 4" X 3".



Type Ring Modulator
Condition New
Power 9V DC
Current Draw 200mA
Power supply included No
Manufacturer Warranty 1 year
Shipping & Return


  • Free shipping within Canada.
  • Free shipping to the USA.
  • Free shipping on international orders over 399$.

    Visit the Shipping page for more infos.

Fast Delivery

  • Canada : 1 - 2 business days
  • USA : 1 - 2 business days
  • Rest of the world: 3 - 5 business days.

Hassle-Free Returns

You have 45 days to test your new gear.
If you choose to return it, we’ll send a full refund.
It’s that simple: no bogus restocking fees or charges.

Visit the Returns page for more infos.


Frequently Asked Questions

  • Q : Is this item in stock? +

    A : On product pages, you can find an availability status.

    Products with the mention 'In stock' are in stock and ready to ship.

    Products with the mention 'Out of stock' are not currently in stock.

    For out of stock products, you can ask to get notified as soon as the item is back in stock.

    Enter your email in the ‘Email me when available’ field and you’ll be kept in the loop.

  • Q : Where are you located? +

    A : We’re in Blainville, Quebec, Canada.

    Contact us to schedule an appointment if you’d like to meet.

  • Q : When will my order ship? +

    A : Orders placed before 3pm EST ship on the same business day.

    An update with tracking details will be sent shortly after purchase.

    (Please note: business days don’t include weekends and holidays)

  • Q : How much does shipping cost? +

    A : Shipping to Canada and the USA is free on most orders.

    Shipping to the rest of the world is free on orders over 399$US.

    Visit the Shipping page for more infos.

  • Q : What shipping method do you use? +

    A : We ship with UPS.

  • Q : What payment methods do you accept? +

    A : We accept credit cards and Paypal.

  • Q : Do you charge sales taxes to Canadians? +

    A : Canadian residents are asked to pay sales taxes:

    Alberta: 5%.

    British Columbia: 5%.

    Manitoba: 5%.

    New Brunswick: 15%.

    Newfoundland and Labrador: 15%.

    Northwest Territories: 5%.

    Nova Scotia: 15%.

    Nunavut: 5%.

    Ontario: 13%.

    Prince Edward Island: 15%.

    Quebec: 14.975%.

    Saskatchewan: 5%.

    Yukon: 5%.

  • Q : Are there import charges on orders shipped to Canada? +

    A : No. Canadian customers will not be charged import fees.

  • Q : Are there import charges on orders shipped to the USA? +

    A : No. USA residents will not be charged import fees.

  • Q : Are there import charges on International shipments? +

    A: Shipping prices do not include VAT or other import taxes.

    Customers outside of Canada and the USA are responsible for duties and taxes.

    Orders that come back to the shop as refused by the customer will be refunded minus shipping.

    Please track your shipment to be aware of customs processing and delivery attempts.

  • Q : Can you declare a lower value on customs documents? +

    A : We understand that import fees are an annoying part of international purchases.

    However, we cannot offer to declare a lower value on customs forms.

    Customers outside of Canada and the USA are responsible for any fees that may be charged by their government.


Customer Reviews

Based on 1 review

I love everything about this!!