Marshall Model 1966 – 200-Watt P.A. Amplifier

The Marshall Model 1966 was the most powerful mixer-based public address amplifier in the early 1970s Marshall catalog. Designed for large venues and demanding live environments, this 200-watt amplifier combined high headroom with a built-in four-channel mixer—delivering professional-level clarity and volume at a time when most P.A. systems were still relatively primitive.



If you wanna sell your vintage Marshall from 1963-1974 click here

Technical Overview

The 1966 offered:

  • 200 watts of output power
  • Eight total inputs, arranged into four channels
  • Each channel had:
  • Two inputs
  • Independent volume controls
  • Shared tone controls across all channels:
  • Presence
  • Bass
  • Middle
  • Treble
  • ON/OFF and Standby switches

This layout allowed users to balance multiple microphones or instruments on stage while retaining centralized control over tone shaping and it was a massive step forward in pre-mixer-era P.A. design.

Physical Design and Dimensions

Per the May 1971 catalog, the Model 1966 measured:

  • Height: 10¾ inches (27.31 cm)
  • Width: 29 inches (73.70 cm)
  • Depth: 11 inches (27.94 cm)

It was housed in a wide, low-profile cabinet, covered in black vinyl, with Marshall’s signature gold control panel and custom black knobs. Rugged and heavy, the amp was built for stage use and frequent transport.

Collector Value

Though it was once a staple of touring rigs, the 1966 is now quite rare—especially in working, original condition. Its large size and utilitarian use led many to be modified or retired, and surviving examples are now prized by collectors of early British live sound equipment. For studios recreating vintage recording environments or bands building period-correct rigs, the 1966 is a holy grail.


Own a Marshall P.A. head like the 1966?
Scruffs Vintage Guitars buys vintage Marshall amplifiers and cabinets from 1962–1974—including full P.A. setups. Contact us for a fast, expert appraisal and a fair market offer.

Let me know when you're ready to move on to the Model 1968 (100-watt P.A. amp).



If you wanna sell your vintage Marshall from 1963-1974 click here