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Marshall 1968 50 Watt Plexi

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Page last updated Dec 16, 2025

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Description

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Step back in time with the Marshall 1968 50 Watt Plexi, a guitar amplifier head that epitomizes the classic rock sound of the late '60s. Known for its iconic all-tube circuitry, this amp head delivers rich, dynamic tones that have powered countless legendary performances. Whether you're chasing the raw power of classic rock or the punchy clarity of blues, the Plexi’s versatile tonal palette makes it a staple for both stage and studio.

The 1968 50 Watt Plexi is revered for its unique, responsive dynamics, making it a favorite among guitarists who value expressive playability. Its intuitive control panel provides easy access to a range of tones, from warm cleans to crunchy overdrive, all while maintaining the amp's signature vintage character. This amplifier head is designed for those who appreciate the authentic, unadulterated sound that defined an era.

Ideal for musicians who crave vintage authenticity with modern reliability, the Marshall 1968 50 Watt Plexi is a testament to the enduring legacy of Marshall amplification. Crafted to offer the same sonic experience as its predecessors, this amp head is perfect for those seeking to capture the timeless tones that have shaped music history.

Key Features:

All-tube circuitry for classic, rich tones
50-watt power output, suited for both stage and studio use
Four input channels for versatile connectivity
Simple, intuitive control interface
Renowned for its dynamic response and expressive playability

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ProGuitarEurope

ProGuitar presents:1968 Marshall 50 Watt Plexi by Thomas Blug

ProGuitarEurope

1968 Marshall plexi 50 Watt 2

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1968 Marshall plexi 50 Watt 1

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Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Marshall 1968 50 Watt Plexi.

Comparisons

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The 1987 model will achieve breakup at a lower volume than the 1959 model, making it better for those seeking earlier overdrive without ear-splitting volume levels.
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The 100W versions have tighter and stiffer low-end response due to increased filtering in the power supply compared to the 50W models.
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Late 70s and early 80s models have increased gain and highs, similar to JCM800 amps, catering to heavier tones.
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A 50W JCM900 was used effectively in bands with multiple drummers, indicating its capacity to handle intense volume demands.
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Features and functionality

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The 100W Plexi provides a wider dynamic range and stays cleaner at higher volumes, ideal for players needing super clean sounds and powerful bottom end.
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The 1987 model has less power supply filtering and uses two-phase rectification, contributing to its earlier breakup and different tonal characteristics than the 1959 model.
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Jumping channels on handwired models activates both high and low gain channels for richer sound.
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After the transition to PCB boards, successive models incorporated more gain, altering tonal characteristics.
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The amp's high gain is described as "fizzy" and can get lost in the mix; maintaining high mids and using less gain improves clarity.
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Use cases and applications

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For achieving Hendrix tones, a stock Marshall amp combined with a fuzz pedal can replicate his sound; however, specific Hendrix clone amps might yield closer results without modifications.
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A 50W Marshall tube amp, like the JCM2000, is noted to be excessively loud for most scenarios, often not requiring more than 3-4 on the volume dial.
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A 50W tube amp reportedly delivers 75% of the volume of a 100W amp, showcasing its capability to handle large venues without being mic'd.
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Build quality

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Handwired models from 1968-1971 are highly coveted for their robust construction and superior loudness.
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User experience

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Owners report that 100W models, especially from early 70s, are exceptionally loud and best when cranked up.
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Mods and upgrades

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An EQ pedal is recommended to control muddiness and harsh highs at high volumes; a Tube Screamer can also be used as a clean boost for mid-range enhancement.
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Setup and maintenance

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It's advised to check for biasing issues on the JCM2000, as improper bias can degrade sound quality or damage the amp.
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Critic Reviews

Marshall JMP50 “Plexi” | Vintage Guitar® magazine

vintageguitar.com

The 1968 Marshall 50 Watt Plexi is a pinnacle of rock history, offering the quintessential "Marshall sound" that defined legendary rock tones. With its EL34 tubes, solid-state rectification, and distinctive circuit design, it delivers a bold, punchy crunch that became synonymous with British rock. It's the sound of icons like Hendrix and Page, making it a must-have for those seeking authentic vintage tone. Yet, its power can be overwhelming for smaller settings, and its classic build might not suit modern versatility seekers. Still, for purists, it's a sonic treasure.

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