Radial Engineering Plexitube
Tonebone Tube Distortion Pedal


This two channel tube distortion pedal combines the natural warmth and harmonic generation of a 12AX7 tube with the control and saturation of our unique multi-stage solid-state drive circuit. This combination provides incredible gain with tons of overtones and, when combined with our unique passive-interactive EQ, produces four generations of Marshall Plexi tones worthy of a Shakespearian Ode.

Designed to enhance on-stage functionality, the Plexitube™ features two distinct distortion channels for on-the-fly transition between rhythm and lead settings. Channel-1 has been optimized for rhythm with chunk rhythm tones and scooped out mids for a thunderous wall-of-sound and complete world domination. Channel-2 is optimized to produce razor-sharp cut for solos and sustaining mids that are so smooth, they can make a grown man cry. This is augmented with an effects loop that can automatically turn your delay on for leads. No tap dancing!

When the Plexitube is off, true-bypass connectivity ensures the natural tone of your guitar goes directly to your amp without obstruction or a tone robbing load.

Radial Engineering Plexitube Features:

  • 12AX7 equipped tube distortion
  • Clean, rhythm and lead in one pedal
  • Insert loop on lead channel for effects
  • True bypass clean for natual tone
  • Huge chunky rhythm settings with scooped mids

Radial Engineering Plexitube Specifications:

  • Circuit type: Hybrid tube / proprietary circuit
  • Tube type: 12AX7 vacuum tube
  • Input impedance: 1meg Ohm at input jack
  • Output impendence: 10K Ohm
  • DRIVE control: Input drive gain control for both channels.
  • Intermediate Ch-2 Drive trim adjuster: Recessed control - accesable with a tweeker.
  • VOICING 1 & 2 3-way switch: Used inconjunction with the Ch-1 and Ch-2 Contour controls
    • CHANNEL-1: Fat, Scoop,Out
    • CHANNEL-2: Fat, Scoop, Extra Scoop
  • Ch-1 & Ch2 Contour: Separate sound shaping control for each channel.Used in conjuction with the VOICING 3-position switch
  • MID BOOST 3-way switch: Used to fatten up the sound for more cut and sustain during solos. Also, will fatten up the sound of single coil pickups.
    • High: +12dB @ 620Hz
    • Medium: +7dB @ 390Hz
    • Off: No boost
  • TOP END 3-way switch: Switch sets the overall tonal character of the Plexitube to best match the amp and settings. Brighter amps are normally compensated with darker settings.
    • Bright: Boosts +6dB@ 10kHz
    • Flat: No boost
    • Dark:Cuts -6dB @ 1.8kHz
  • HIGH & LOW EQ controls: Unity gain to +15dB
    • Low: +/- 14.5 db @ 100Hz
    • High: +/- 10 db @ 4.3kHz
  • LEVEL-1 & LEVEL-2 controls: Used to balance the output level between the input drive without altering any of the tonal characteristics. Works like the master volume on an amplifier.
  • Footswitch: True bypass with green on/off status LED; Heavy-duty high-cycle switch
  • LED indicator: Large 3mm OD ultra-bright status LED
  • Switching: Opto-coupler assisted, 5msec Rise time
  • Construction: 14 gauge steel, baked enamel finish
  • Dimensions (W x D x H) 7" x 4.25" x 2" (174 x 108 x 51 mm)
  • Weight: 2.15 lbs. (1 kg)
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