FET Drive

"Tube-y Marshall Plexi Tones"




The FET Drive is an amp sim rack effect module that compares to the Wampler Plexi Drive, designed to deliver Marshall Plexi amp tones from cleanish to cranked and dirty.



The GT FET Drive compares to the Wampler Plexi Drive.  It gives you three cascaded stages of tubey, high-gain JFET transistor drive.  It is meant to serve up the tone of a cranked Marshall Plexi.

It is a simple design, sporting the standard Volume, Gain, and Tone controls.  Bass Boost and Treble Boost switches give you a bit more control over the levels of treble and bass.  At low Gain settings you can get a not-quite-clean boost.  It also cleans up pretty well if you back off your guitar volume.  The treble and bass boosts have a significant impact in their range, including some "nearby mids".  With the Gain and Volume up, it has a nice feel.  Feedback is available in abundance, but the gain doesn't go over the top.  It stays in control without squealing and breaking down with normal input signal levels.  Also, with Gain and Volume cranked, you'll get a little bit of noise, as you would expect.  It is comparable to the noise level of a cranked Marshall.  Fully cranked it has perhaps a smidge less of the high-gain hair than some other Marshall-esque modules.  It is roughly comparable to our PlexiSSGTM-4512K68, and Prime Minister modules.



  • FET Drive - Compares to the Wampler Plexi Drive, designed to sound like a Marshall Plexi amp



No buffers



  • Boost - We can add one of our footswitchable boost modules in front of or after the FET Drive


Front Panel

  • Volume
  • Gain
  • Tone
  • Bass Boost switch
  • Treble Boost switch


Rear Panel

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


Module Width

  • 1.5"
  • 2" left wing available
  • 1.5" right wing available


Power Consumption (aprox)

7 - 12mA


Base Configurations

Part # Description List Price
MOD-FETDRIVE FET Drive module $189



Part # Description List Price
MOPT-FETDRIVE-BOOST Add footswitched boost $TBD



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