Marshall MR4100
Professional music gear - detailed information and where to buy
Marshall
MR4100 - JCM 900
Product Info
Article Number:
104422
Brand:
Marshall
Model:
MR4100 - JCM 900
Category:
Tube Guitar Heads
Price:
$1,648.90
* Prices may vary. Check retailer for current pricing and availability.
This MR4100 nails that iconic JCM 900 sound—raw, aggressive, and undeniably Marshall. It's a fantastic head for players chasing vintage high-gain tones, particularly in rock and hard rock, but be aware it’s not a quiet amp. If you’re after a focused, powerful amp with that classic Marshall vibe, this is a strong contender.
Product Description
- Marshall MR4100 - JCM 900
- 2 Channel Amp Head
- Dual Reverb
- Power: 100 W
- 4 x 5881 power tubes
- 3 x ECC83 preamp tubes
- Reverb (Accutronics)
- 4-band EQ
- Effects loop
- Direct Recording Output
- High/Low output selector switch
- LED tube defect indicator
PROS
- • Authentic JCM 900 tone, delivering that classic Marshall crunch.
- • Robust build quality with Marshall's signature chassis and durable components.
- • Dual reverb adds depth and dimension to your sound, a welcome feature.
- • Versatile 4-band EQ allows for precise tonal shaping across genres.
CONS
- • Can be quite loud even on the low power setting, requiring careful volume management.
- • Limited channel flexibility compared to more modern, multi-channel amps.
- • The effects loop is a bit basic, lacking advanced routing options.
Product Video
Key Features
Power (Watts
100
Tubes
4 x 5881 power tubes, 3 x ECC83 preamp tubes
Channels
2
Effects
Accutronics Reverb, Effects Loop
Speaker Output
4 Ohm, 8 Ohm, 16 Ohm
Weight
Approximately 35 lbs
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Frequently Asked Questions
The clean channel is more of a platform for overdrive than a pristine, sparkling clean – it’s darker and warmer, perfect for rhythm playing with a touch of grit.
It's generally reliable, but like any electronic indicator, it's best to visually inspect the tubes periodically for confirmation – it’s a good early warning system though.
Switching to the low output setting reduces the volume significantly while maintaining the core JCM 900 character; it's a great way to get that tone at manageable levels.
