Red Panda Radius


Stereo ringmodulator and frequency shifter with presets, tap-tempo, MIDI clock and more.

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SKU: 405253

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The Red Panda Radius is a ring modulator and frequency shifter with pitch tracking and an advanced LFO. It is 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 complex harmonic structures, bell-like tones, metallic textures, frequency shifting, soft tremolo, and bubbly phaser sounds at your fingertips.

Pitch tracking, a push-to-tune footswitch, and picking dynamics make the Radius responsive and predictable on stage. Hold the left footswitch and play a note to tune the carrier oscillator to that note. Pitch tracking maintains the pitch ratio as you play up and down the scale, or tracks by a ratio (or inverse) for more dynamic sounds. An expression pedal can be assigned to any combination of knobs.

Radius goes far beyond traditional ring modulation. With precise control over the balance and frequency ratios of both sidebands, you’ll have more advanced control than with any ring mod that has come before.

A ring modulator multiplies two signal signals together to create new frequencies that are the sum and difference of the input frequencies. One signal is your instrument, and the other is an internal oscillator. The Radius can double the sum or difference frequency ratios and adjust their relative levels, unlocking a spectrum of timbres beyond traditional ring modulation. It has an advanced LFO with triangle, square, random waveforms and an eight-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.

Well-spaced controls and stereo input/output make the Radius perfect for sound design, synths, and creative mixing. A full MIDI implementation allows you to sync to MIDI clock, sequence parameter changes, and play the carrier oscillator from a keyboard.

This is a musical ring modulator and frequency shifter that transforms the timbre of your instrument in new ways. With deep features and intuitive control, Radius modernizes classic electronic techniques for the future.


Highlights Stereo ring modulator and frequency shifter
Continuous mix between ring modulation and frequency shifting
Presets (4 on board, 100 via MIDI)
Tap tempo and MIDI clock sync
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 with 1-8 steps, programmable via front panel
Envelope-triggered LFO (one-shot ramp, pulse, random, step mod)
Envelope follower
Assignable expression pedal, remote switch, remote tap, or MIDI port
Configurable AUX switch (tap, tune, preset, LFO)
Full MIDI implementation, USB and TRS MIDI
Stereo input/output (TRS)
96 kHz sampling rate
Web-based editor for editing presets and accessing hidden parameters
Designed and assembled in the USA
Bypass Selectable buffered bypass, DSP, Analog (buffered)+FX Level or Kill Dry
Power consumption 9V DC center negative (power supply sold separately)
250 mA
Dimensions H: 6,3 cm (incl. knobs)
W: 7,7 cm
D: 12 cm
Weight 340 g.