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Marshall 1973 JMP 50 Watt Lead Tube Amp

Marshall 1973 JMP 50 Watt Lead Tube Amp

$1,599.00 Price Tier: High-end

5.0 (1)

1 Review

This product is Vintage or Discontinued

Newer option

1973 Marshall JMP MKII 50 watt head

$1,599.00

5.0 (1)

Find out who is using Marshall JMP 50 Watt Lead 1973

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Page last updated Jul 06, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated July 6, 2026.

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5.0 (7)

$1,599.00 26 available Used

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Average Price: $1,599

High-end/Boutique

$300

$801+

Price Tier

In the Guitar Amplifier Heads category, Marshall 1973 JMP 50 Watt Lead Tube Amp is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

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High-end

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Description

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The Marshall 1973 JMP 50 Watt Lead Tube Amp is a quintessential piece of gear for any guitar enthusiast seeking that iconic vintage British tone. Known for its all-tube design, this amplifier head delivers a warm, rich sound that has graced countless records and stages. The 50-watt output power is perfect for those who need volume and clarity without sacrificing tone quality. This amp's straightforward controls make it easy to dial in the perfect sound, whether you're playing in a small club or a large venue.

The JMP 50 is celebrated for its dynamic response and ability to capture the nuances of your playing style. Its classic circuitry is revered for producing a sound that's both punchy and harmonically rich, making it a favorite among rock and blues guitarists. With its robust construction and timeless design, the Marshall 1973 JMP 50 Watt Lead Tube Amp is built to withstand the rigors of touring while maintaining top-notch performance.

Key Features:

50-watt all-tube amplifier head
Classic Marshall tone with rich harmonics
Straightforward control layout for easy sound shaping
Robust construction for durability
Ideal for rock and blues genres

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Johan Segeborn

Marshall '70 vs'73 JMP - ZEP vs ACE

Johan Segeborn

Marshall JMP 50 1973

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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 1973 JMP 50 Watt Lead Tube Amp.

Features and functionality

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The amp lacks a master volume, making it challenging to play without an isolation booth or attenuator due to its high volume output.
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The inclusion of a 'post phase inverter master control' mod has been noted, allowing for volume adjustments without altering the amp's original tone.
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Mods and upgrades

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Installing a master volume is a recommended mod, which can be done using one of the speaker outs without needing to drill holes.
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A Jose Arresondo style mod is indicated by a pot on the input; a third switch might suggest a different mod or additional feature.
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The Harley Benton Vintage 2x12 is highly recommended as a budget-friendly cabinet, featuring Celestion Vintage 30 speakers and offering mono or stereo configurations.
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User experience

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The amp is described as very bright and cuts through band mixes effectively; it requires high volume for optimal tone, enhancing power tube saturation.
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WGS Invader 50 and WGS ET65 are favored as U.S. made alternatives for Greenback and Creamback speakers, praised for their tonal quality.
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Multiple owners prefer Greenbacks for a 2x12 setup, finding them superior in tone after testing various speaker combinations like V30s and T75s.
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Use cases and applications

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Ideal for players who want the classic Marshall crunch; works well as a pedal platform despite its reputation for being a one-trick pony.
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A Marshall JMP 50 works best with a Marshall 2x12 with Celestion Vintage 30s for non-metal genres, matching its classic rock sound profile.
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Setup and maintenance

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The EQ section is subtle and reacts significantly to guitar knob adjustments, allowing for detailed tone shaping without becoming muddy.
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Comparisons

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Compared to Fender and Vox amps, the Marshall JMP 50 is considered a "lifer" amp by some, known for its versatility beyond traditional rock sounds.
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Owners recommend Friedman, Suhr, or Orange 2x12 cabs for pairing, emphasizing quality speakers to complement the amp's sound.
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5.0 out of 5

Based on 1 Review and 1 Rating

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peterglavanov

713

over 9 years ago

Marshall Plexi JMP 50 MkII super lead

Mine is made in 1975 and has just one sound..all knobs to 10 and here is AC/DC sound!I use it only for studio sessions.High channel 1 and 2 jumped to low channel 2.I use it with a Marshall 4X12 cabinet loaded with rear Rola Celestion G12-18 15 ohms Amazing amp!