"Two Channels of Marshall Plexi Tone, with a Boost!"



The PlexiSS amp sim rack effect module compares to a modded Carl Martin Plexitone.  As an overdrive or distortion, it provides two separate channels of tube-y Marshall plexi tone, along with a boost. 



The PlexiSS is three footswitched effects in one circuit.  There are two independent FET-based circuits providing Marshall Plexi tones that range from clean-ish boost to high-gain metal.  Each one has its own Gain and Tone control, with a shared Volume control, similar to a 2-channel (Crunch and Gain) master volume Plexi.  In addition, there is a face-melting FET Boost at the end.  Channel selection and Boost are controlled by footswitches so you can easily stomp on a different tone as you play.



  • PlexiSS - There is only one base configuration, but several options for tailoring it your needs.  Compares to Carl Martin PlexiTone



Has input buffer



  • Hi Cut Switch - Add a switched treble and noise cut at the end of the circuit
  • Hi Cut (no switch) - Add an always-on treble and noise cut at the end of the circuit
  • Custom Clipping - Default is crunchy symmetric red LED clipping on both channels.  Choose something different for either channel or both.
  • Change Footswitch to Toggle Switch - Change either the Channel footswitch or Boost footswitch (or both) to front panel toggle switch(es)
  • Custom Op Amp - Default TL072 is a quiet, tube-y FET-based op amp.  Choose pin-compatible replacement for either Channel or for Boost, or some combination.
  • Custom Components - Metal film resistors and a selected set of capacitors are selected for low noise and tone.


Front Panel

  • Volume
  • Crunch - gain of Crunch channel
  • Gain - gain of Gain channel
  • Crunch Tone - tone of Crunch channel
  • Gain Tone - tone of Gain channel
  • Boost - boost level
  • (optional) Hi Cut switch
  • (optional) Channel switch instead of footswitch
  • (optional) Boost switch instead of footswitch


Rear Panel

  • Audio In
  • Audio Out
  • On/Off Footswitch
  • On/Off Override
  • DC Power
  • DC Power LED
  • Boost Footswitch
  • Boost Override
  • Channel Footswitch
  • Channel Override


Module Width

  • 2"
  • wing modules not presently available


Power Consumption (aprox)

45 - 55mA


Base Configurations

Part # Description List Price
MOD-PLEXISS PlexiSS module $249



Part # Description List Price
MOPT-PLEXISS-HCS Hi Cut Switch $19
MOPT-PLEXISS-HCNS Hi Cut (no switch) $0
MOPT-PLEXISS-FS2TS Change One Footswitch to Toggle Switch -$9
MOPT-PLEXISS-CC Component Changes TBD



Part # Description List Price
MPT-PLEXISS-CA Replacement pot, switch, jack, LED cable assembly $19
MPT-PLEXISS-KNB Replacement control knob $2
MPT-PLEXISS-PB Replacement power board $29
MPT-PLEXISS-SB Replacement switching board $29