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Marshall UK Modified JCM800, 100W Valve Head – guitar amplifier
The Marshall UK Modified JCM800 100W Valve Head is a professional, all-tube guitar amp head combining the legendary JCM800 sound with modern features. With a 100W output section, ECC83/EL34 tube setup, and added Gain Boost, Mid Boost, and Tight switches, it provides exceptional tone-shaping versatility. Equipped with an FX loop, comprehensive EQ controls, and multiple speaker outputs, it’s ideal for live gigs, studio recording, and rehearsals. For guitarists seeking vintage British tone with extra control, this head delivers power, precision, and iconic sound in one compact package.
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Product attributes
Model :
UK Modified JCM800, 100W Valve Head
SKU :
SUP_KC1213
Warranty :
2 years
Producent :
Marshall
Weight without package:
20.5 kg
Incl. Footswitch:
YES
Product Description
Details
Marshall UK Modified JCM800 100W Valve Head – Tube Guitar Amplifier Head
A timeless classic meets modern functionality – the Marshall UK Modified JCM800 100W Valve Head is a powerful tube amplifier head that blends the legendary tone of the JCM800 with additional features tailored to today's stage and studio demands.
Product Features
This 100W all-tube amp delivers huge dynamics and the authentic tone of rock heritage. It features a proven tube layout: 2× ECC83 in the preamp, 1× ECC83 as phase splitter, and 4× EL34 in the power stage. This combination offers the full "Marshall character" – raw gain, strong mids, and crisp highs, perfect for riffs, solos, and powerful rhythms.
The “Modified” version includes three added switches: Gain Boost (for even more saturation), Mid Boost (to bring out the mids), and Tight (for focused, punchy bass – great for fast and precise playing). These allow you to shape your tone from vintage overdrive to modern high-gain aggression.
The front panel features classic EQ controls: Treble, Middle, Bass, Presence, as well as an FX loop (Send/Return) – making this amp suitable for clean setups or complex effect chain integration. The 16Ω / 8Ω / 4Ω speaker outputs offer flexibility with various speaker cabinets.
Versatile Sound Design
The Marshall UK Modified JCM800 provides classic British sound with modern flexibility via the three tone-shaping switches. You get a highly dynamic and responsive tool – ideal for blues, classic rock, hard rock, and even metal. Gain Boost gives you thick overdrive, Tight enhances precision, and Mid Boost cuts through the mix with ease.
This amp is not just a tribute to vintage tone – it’s a fully analog, modern sound machine. With this model, you can shape your band’s signature tone in the studio or on stage.
Applications
Perfect for guitarists seeking the iconic rock or metal tone with added modern control. Ideal for live performances, studio sessions, and rehearsals. Whether you're playing vintage-inspired riffs or aggressive chugs, this head won’t let you down.
Technical Specifications
- Output Power: 100 W RMS
- Type: Guitar amplifier head
- Technology: All-tube circuit
- Tubes: 2× ECC83 (preamp), 1× ECC83 (phase splitter), 4× EL34 (power amp)
- Channels: 1
- Inputs: 2
- EQ: Treble, Middle, Bass, Presence
- Effects loop: Send/Return
- Switches: Gain Boost, Mid Boost, Tight
- Speaker Outputs: 16Ω / 8Ω / 4Ω
- Dimensions: 746 × 304 × 214 mm
- Weight: 20.3 kg
Materials and Build Quality
The amplifier is crafted with top-tier components – featuring a rugged steel chassis, durable knobs, and the unmistakable Marshall aesthetic. It’s built to handle tours, daily studio work, and everything in between.
Included in the Box
- Marshall UK Modified JCM800 100W Valve Head – tube guitar amplifier
- Power cable
- User manual
Summary
The Marshall UK Modified JCM800 100W Valve Head is a classic amp enhanced with modern upgrades. It delivers iconic Marshall tone with greater tonal control. If you're looking for a versatile, powerful, and character-rich amplifier – this is it.
Shipment
Product delivery details Marshall UK Modified JCM800, 100W Valve Head – guitar amplifier
Shipment from Warsaw, Poland.
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Product faq
Marshall UK Modified JCM800, 100W Valve Head – guitar amplifier - Frequently asked questions.
Is the Marshall UK Modified JCM800 a tube amp?
Yes, it’s a full tube amplifier using ECC83 and EL34 tubes in its preamp and power sections.
What is the amp’s output power?
It delivers 100 watts RMS – great for stage use and loud environments.
How many channels does it have?
It has one channel with two classic input jacks.
What are the “Modified” features?
Gain Boost, Mid Boost, and Tight switches for enhanced tonal control and responsiveness.
Does the amp have an FX loop?
Yes, a traditional Send/Return FX loop is included for external effects.
Can I use different speaker cabinets?
Yes – it supports 16Ω, 8Ω, and 4Ω outputs for flexible cab matching.
Is it suitable for studio recording?
Absolutely – its dynamic range and tonal precision make it ideal for studio sessions.
What are its physical dimensions?
It measures 746 × 304 × 214 mm – a classic amp head format.
How would you describe the amp’s sound?
Classic British tone with modern high-gain capabilities and tight response.
Who is this amp designed for?
For players seeking authentic Marshall tone with enhanced versatility and control.
