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Marshall JCM900 4100 100-watt 2-channel Tube Head , $2,449.99 - Add to Cart Skip to Product Information

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
Marshall JCM900 4100 100-watt 2-channel Tube Head

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Marshall JCM900 4100 100-watt 2-channel Tube Head
In Stock!

Get Big Rock Tones with the JCM900 Reissue

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Our Product Research Team

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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.

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 JCM900 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

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.