The Ceriatone Plexi 50 1987 Lead 50 watt amp is the namesake of the fabulous Marshall Plexi amps. Although designed originally in the mid 60's, they gained the most notoriety in the 80's and early 90's. 

We offer 6 versions of the Plexi 50:
1. ’67 = shared cathode, “bass” tonestack, soft filtering.  Big and creamy.
2. ’68 = split cathode, “lead” tonestack, soft filtering.  Brown.
3. ’69 = split cathode, “lead” tonestack, medium filtering.  Still brown, but more firm.
4. ’70 = split cathode, “lead” tonestack, heavy filtering.  Crunchy, percussive.
5. ’73 = split cathode, “lead” tonestack, heavy filtering.  Bright, percussive, quick transition to breakup.
6. The "DOOKIE MOD"

The earliest Plexi 50s were actually those that had the same front panel as the JTM 45, and are known as the JTM 45/100 heads. What differentiates these between the later JMP plexi Marshalls is the fact that they employed very large transformers and the filter caps for the power supply were all placed underneath the chassis. All Marshalls during this era were hand-wired point to point with no printed circuit boards.

The larger transformers and high plate voltages applied to the earliest 50 watt plexis meant that they had a lot more headroom, were very loud, and also wore down tubes fairly hard. JTM and MK II issue 100 watt lead and bass amplifiers can be thought of as basically louder versions of their smaller JTM 45 cousins. These amps were produced in ’66-’67 and are the most expensive of the range. Again, they were available in lead and bass versions that were somewhat similar, many of the smaller differences disappearing after the volume was cranked up.

Current lead times are listed on the main page at www.guitarampsusa.com.

Check out using 6550's instead of EL34's. We can install 6550's instead of EL34's for a $50 upcharge.

Plexi 50 1987 Lead Amp Configuration Options:

• Chassis I - $1,087
  (Fully working chassis. Tubes not included.)
• Chassis II - $1,196
  (Fully working chassis. Tubes included.)
• Amp Head I - $1,326
  (Fully working chassis installed in a head cabinet. Tubes not included.)
• Amp Head II - $1,434
  (Fully working chassis installed in a head cabinet. Tubes included.)
• 112 Combo Amp - $1,593
  (Fully working chassis installed in a 112 combo cabinet. Tubes included. Speaker not included.)

Main photo is for illustrative purposes only and advertised base pricing is for Chassis I without tubes. Photos may include options that are not included if you order the standard version of the amp or don't order all options available. We also may not offer all options available and/or shown in main illustrative photos. Photos are of products assembled by Ceriatone. We no longer sell kits. Black Tolex is standard on all amps unless otherwise stated in product description.

Ceriatone amps are custom made, 100% hand-built, point-to-point hand-wired amplifiers using the highest quality components and custom wound transformers. Each amp is thoroughly tested and burned in before it is shipped to you. Even with long lead times Ceriatone takes no shortcuts or makes any changes to their build standards in the production of their hand-built amps. This is Ceriatone quality.

Pricing shown on www.guitarampsusa.com includes the shipping cost to the USA only. We only ship to the USA, Canada and Mexico. Shipping to Canada, Mexico, Puerto Rico and the US Virgin Islands will have additional shipping. We'll invoice the difference in shipping and it is due at the time the order is placed.