Marshall JCM900 4100 100-watt 2-channel Tube Head

100-watt 2-channel Tube Guitar Amplifier Head with 4-band EQ, Reverb, Effects Loop, and Line Out
Marshall JCM900 4100 100-watt 2-channel Tube Head image 1
Marshall JCM900 4100 100-watt 2-channel Tube Head image 1
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Marshall JCM900 4100 100-watt 2-channel Tube Head
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Get Big Rock Tones with the JCM900 Reissue

Bring legendary Marshall tone to your rig with the JCM900 4100 guitar amplifier head. With dual channels, a shared 4-band EQ, and 100 watts of all-tube power, you've got an amp that is ready for any gig on any stage. This version of the Marshall JCM900 includes a series effects loop with true bypass operation - perfect for gigging musicians with lots of pedals. Step up to the professional's choice for outrageous Marshall tone - the JCM900 4100 guitar amplifier head.

Marshall JCM900 4100 All-tube 100-watt Guitar Amplifier Head at a Glance:
  • The versatile sound of rock
  • Marshall heritage and quality
  • Add your favorite pedals with the series FX loop
The versatile sound of rock

Plug your favorite guitar into the all-tube, 100-watt JCM900 4100, hit a chord, and hold on - that tingling behind your eyeballs means you've tapped into the tone that shaped modern rock. The JCM900 won over tons of guitar players with its incredible versatility. Channel A goes from sparkly clean all the way up to raucous crunch and everything in between. Channel B gives you everything from crunch to soaring, saturated lead tones. Each channel on the Marshall JCM9000 features independent volume, reverb, and gain. The shared 4-band EQ lets you dial in exacting tonalities for any sound you need. The Marshall JCM900 4100 is an amazing and flexible workhorse amplifier head.

Marshall heritage and quality

Every Marshall JCM900 is made at the Marshall factory in the tonal heart of England. Time-tested, traditional methods of craftsmanship and construction are combined with the latest advances in modern manufacturing technology, ensuring world-class build quality and roadworthiness. Internally, the JCM900 circuitry and layout has been kept to a minimum, ensuring the integrity of the guitar tone and an incredibly low noise floor - this coupled with meticulous valve selection and high tolerance, quality components adds to the all-important reliability factor that is synonymous with the Marshall legend.

Add your favorite pedals with the series FX loop

Consider yourself lucky, because this JCM900 4100 sports a feature not found on the original JCM900 - a series effects loop! And thanks to true bypass operation, your slew of pedals won't color the tone of the JCM900 4100 one bit.

Marshall JCM900 4100 All-tube 100-watt Guitar Amplifier Head Features:
  • Reissue of the beloved JCM900 all-tube head
  • Incredibly powerful at 100-watts - not an amp that's made to be played quietly
  • All-tube design and tone featuring ECC83 and 5881 tubes
  • Series FX loop lets you switch effects pedals in and out, with true bypass operation for sonic transparency
  • Straightforward control set is all you need to craft a range amazing guitar tones
  • 2 speaker outputs for connecting extension cabinets
  • Birch-ply construction is incredibly strong and ready for life on the road
Bring big rock tones to the stage with the Marshall JCM900 4100 guitar amplifier head!

Additional Media

Guitar Amp Buying Guide
JCM900 4100 100-Watt 2-Channel Tube Head User Manual

Tech Specs

Type Tube
Number of Channels 2
Total Power 100W
Reverb Yes
EQ 4-band
Preamp Tubes 3 x ECC83/12AX7
Power Tubes 4 x 5881
Inputs 1 x TS
Outputs 2 x TS
Effects Loop Yes
Footswitch I/O Yes
Height 12.2"
Width 29.5"
Depth 8.6"
Weight 41.5 lbs.
Manufacturer Part Number M-4100-U

Customer Reviews

Based on 6 reviews
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King of Tone

I own several Marshalls, a Mesa Mark V, a couple Peavey's, and have played on many others as well... I love and appreciate the different tones of all my equipment and others I have played (I am a tone junkie, and never met a tube amp I didn't like...). I am very fortunate that I can have a few great amps, But, if I had to pick 1 amp as my favorite, and only have one amp. IT WOULD EASILY BE THE MARSHALL JCM 900 4100. The heavy metal tone, and the clean tone out of this amp is KILLER!!!... The heavy tone on this is great alone, but if you want even more atttack, a Boss disto pedal with the disto on 1 and level about half puts this thing over the top. Everyone gets hung up on these new "so called" super ultra gain amps that do not need a pedal at all. Well, I own a couple of those, and IMHO, the JCM 900 sounds better then those. Yeah, sometimes you may want to use a pedal with the 900 for a little more edge, but fact is, this amp with a pedal sounds better then those amps that do not use one... I recommend this amp more then any other amp. I tell people the Marshall JCM 900 4100 is the single best sounding amp you can buy! and it is one of the easiest to set up, use, and get your tone.

Love the JCM 900!

I have an original from the '90s. I absolutely love this amp. It's an absolute beast! Built like a tank and has that Marshall tone for days! The clean tones are nice and the reverb is great but let's face it - it's the distortion that put Marshall amps on the map. This baby more than delivers when called on to deliver awesome rock tones. Like all of the other Marshalls in the family tree - the louder the better! Speaking of loud - I don't think I've ever had the master volume past 3.5 in the house. At that level, the windows are already rattling from the immense volume this thing cranks out! I can only imagine how loud it would actually be on full throttle without any attenuation. Maybe something akin to a jet engine being tested in the living room?! I use an overdrive pedal to boost the lead channel in order to get that violin-like sustain for modern lead tones and legato runs. The MXR Distortion III is my personal favorite. I've read alot of negative comments online from people who bash the JCM 900 in favor of the JCM 800. Don't believe them. The JCM 900 is a great amp with just a little bit more "grind" in the lead channel compared to the 800. Every once in a while I have the opportunity to play other amps - Orange Rockerverbs, Peavey 5150s/6505s, Friedmans, etc. All of them sound great and I'm tempted to purchase one of my own but then I come home and plug back into my JCM 900 and I'm like, "Nah... I'm good."
Music background: Playin' thirty seven years. Rock and Metal.

marshall jcm 900 amp

this is my first marshall and it makes all my line 6 amps seem so worthless.i have a Ibanez tube screamer pedal I run along with 5 don't need them but to get that van halen rhoads Hendrix thing you need them, but the amp by its self is awesome I play les pauls strats and wolfgangs.each guitar sounds amazing.from me to you spend the money don't do like I did and blow thousands on amps that in the end just aren't marshalls.there is a reason why the above mentioned guys played marshalls.
Music background: pro musician

Great Workhorse

The JCM900 is a great amp that seems to be widely underrated. At a gig last weekend, the JCM800 that I was using frazzled out on me, so our bass player quickly brought in his JCM900 for me to use. That JCM900 saved the evening and I have to say that it sounded better than the JCM800 for the venue we were playing at (of course I mean when the 800 was working). I was able to quickly dial in a great tone and it made my Flying V sing, it sounded AWESOME! More versatile than the JCM800, and less money. Great tone, plenty of LOUD when you need it, but also sounds awesome at lower sound levels when using the low power level output mode. The JCM900 is tonally versatile amp that can provide great tones for different sound levels and styles of playing. It ROCKS!
Music background: Working Musician

Classic tone and bottom

I have an original JCM 900 100W half stack from 20 years ago and it's still cranking like new.Serious bottom with this amp and there's no substitute for it's tone and sustain, It blows other amps right off the stage. Who needs cheesy distortion pedals when you have this beast? My setup consists of a Les Paul,Strat or ES 335 plugged straight into this thing and that's it,with the exception of using a Wah or Univibe once in a while for kicks.If you can't get it done with that then you're doing something wrong.Rock on and make their ears ring!!
See also: Amp Heads, Marshall, Marshall Guitar Amp Heads