The Ultimate Low Volume Tube Amp The Fargen Mini Plex MKIII features the ultimate English classic rock and high gain crunch tones. It pumps out quality tone on par with a 50 or 100 watt Marshall, and maintains this tone at apartment/bedroom levels without tonal sacrifice. The Mini Plex MKIII hand-wired tube amplifier delivers high-energy, cranked tube amp tone at whisper quiet volumes with a mixture of great tube amp design & world-class custom components that you won’t find anywhere else. This includes all of your favorite British high gain and classic rock tones with the help of our patented “Decade Switch” technology. The Fargen “Decade Switch” gives you 2 different classic sounds/gain structures and morphs between 2 completely different classic British preamp circuits…Classic Plexi JMP and hot rodded JCM 800. Step up to the ultimate in apartment/bedroom/small stage British tube amplifier.

Why did you remove the Power Scaling function from the MKIII?

Fargen Mini Plex MK III Amp Features

  • 12 Watt Class A power amp
  • Custom USA transformers w/ 8-16 ohm taps
  • Vintage style mustard capacitors
  • Dual power tube sockets for use with any octal power tube(no re-bias)
  • Use EL34/KT66 /KT77/6550/6L6/5881/6V6 ECT
  • The ability to mix and match any of the above tubes…(i.e.El34 + KT66)
  • DC Filaments for ultra quiet operation
  • 1/8″ aluminum chassis for the true vintage British amp sound
  • 2 position rotary decade switch that alters the circuit for true 70’s or 80’s Marshall Style tones. (Plexi / JCM 800)
  • Variac switch for tight or loose response
  • High & Low power switch (jumps between tube and SS rectifiers)
  • New tube buffered FX Loop w/ true bypass


  • Dimensions: 20″W x 11″H x 10″D
  • Weight: 25 lbs.
  • Output Power: 8-12 watts
  • Tube Complement: (2) 12AX7, (2) EL34
  • Will also run KT66,KT77,6550,6L6,6V6,5881
  • GZ34 Tube rectifer
  • Class – Parallel single-ended class A
  • Front Panel Layout & Equalization – Decade, Volume, Master, Treble, Bass, Mid

MSRP Pricing

  • Mini Plex MKIII Amp Head » E-Mail for pricing
  • Mini Plex MKIII 1  x 12″ cabinet » E-Mail for pricing