Multiprocess 4000 Series – The Multiprocess 4000 is a powerful 400-Amp welding machine, capable of Stick welding, MIG welding, or TIG welding with a lift start. Its robust design and high duty cycle make this an ideal all-around workhorse for all medium to heavy-duty applications.


  • Specially designed for tough condition.
  • Heavy-duty, robust design and reliable.
  • High power at 100% duty cycle, tested in 104°F/40°C and 140°F/60°C.
  • Excellent design characteristics ensures welding quality, precise arc striking and highly stable arc.
  • Fully encapsulated PCB to avoid dust contamination.
  • Automatic compensation for main power fluctuations within ± 20%.
  • Electronic continuous control of inductance.
  • Excellent CC/CV characteristic ensures high quality and trouble-free welding.
  • Exceptional welding characteristics in MIG/MAG, Flux-cored, and Stick welding (MMA).
  • User friendly parameters settings.
  • Initial and final crater control.
  • Comprehensive 3 Year Warranty.


  • Welding cable and ground clamp
  • Welding Torch

Optional Accessories

  • Regulator and gas heater
  • TIG welding torch
  • Electrode holder and welding cable
  • Auto-Darkening Welding Helmet