Marshall MG412B 120-watt 4x12" "Carbon Fiber" Straight Cabinet

120-watt, 8-ohm, 4x12" Closed-back Speaker Cabinet
Marshall MG412B 120-watt 4x12
Marshall MG412B 120-watt 4x12
Sweetwater Savings: $160.01 MSRP: $420.00
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Marshall MG412B 120-watt 4x12" "Carbon Fiber" Straight Cabinet
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Start Your Stack with this Marshall Cab!

The Marshall MG412B straight extension cabinet is a 120-watt, 4 x 12" powerhouse with a carbon Tolex look that perfectly matches Marshall's MG series of guitar amplifiers. But no matter what amp you play, the Celestion-loaded MG412B extension cabinet is a rockin' speaker cab for any guitar rig. If you want to push some serious air with the tone and power Marshall is known for, then add the Marshall MG412B extension cabinet to your rig.

Marshall MG412B Straight Extension Cabinet at a Glance:
  • Marshall quality
  • Sound of Celestion
  • All-around cabinet
Marshall quality

Most guitarists just need to see the Marshall name on the cabinet to know they're working with a quality piece of gear. The Marshall MG412B extension cabinet is built with the same attention to detail that earned Marshall the reputation as one of the finest amp makers in the business. From the roadworthy construction to the heavy duty carbon Tolex covering, your MG412B is ready for some serious gigging.

Sound of Celestion

The Celestion name goes hand in hand with the history of great guitar tone. The Marshall MG412B extension cabinet is loaded with four Celestion 12" speakers for that classic Marshall sound.

All-around cabinet

Rated for 120 watts at 8 ohms, the Marshall MG412B is an ideal extension cabinet for virtually any guitar rig with a suitable amp. The MG412B is designed to match with the MG series of guitar amplifiers, but you'll love how it sounds paired with almost any guitar amplifier.

Marshall MG412B Straight Extension Cabinet Features:
  • High-powered extension cab with premium speakers for a great value in a speaker cabinet
  • Built to Marshall's exacting standards
  • Carbon Tolex covering for added durability
  • 4 x 12" Celestion speakers for classic tone and reliability
  • 120-watt, 8-ohm design makes it easy to pair with almost any amplifier
Push your tone to the max with the Marshall MG412B extension cabinet!

Additional Media

Guitar Amp Buying Guide

Tech Specs

Configuration 4 x 12"
Speakers 4 x 12" Celestion
Power Handling 120W
Impedance 8 ohms
Cabinet Type Straight
Open/Closed Back Closed
Mono/Stereo Mono
Height 27.36"
Width 26.57"
Depth 15.35"
Weight 52.91 lbs.
Manufacturer Part Number M-MG412BCF-E

Customer Reviews

Based on 9 reviews
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Complete Stack MG412A & MG412B

First off my sales tech Chris Jenkins is a very dedicated associate who worked me a great deal on 2 cabinets after I purchased the wrong 412B cabinet. Chris went out of his way to fix my predicament. I returned the Cabinet and was only going to get the MG412B when Chris Suggested that I could get 2 new ones for the price of the original one I purchased and sent back. So in a blink of an eye I packed up the wrong one and sent it back. I decided to wait for the 412B cab to come in and get them both at the same time. It was almost 2 weeks before the back order B cab came in and I had both cabs the next day. This was my 1st ever full blown Marshall stack that I invisioned all my life. I fired em up and said OMG what a sound deep crisp ***** to the wall sound. It took me 58 years to get these and I spend more time with them than my wife. Thanks again for such a great deal Chris. I'll be calling you for another MG412B cab shortly. Awesome company
Music background: Guitar player since age 12. Played in several groups, recording and song writer

Awesome Marshall Tone at a Project Studio Price

I don't do reviews normally, but felt I needed to mention something about these cabinets. I bought two of these from Sweetwater back in 1/15. I have had a chance to record in a live setting on 5 different occasions now and have been simply amazed at the tones depth and attack. I have been using the Vox Night Train NT15H-G2 15-Watt Tube Head, Boss DS-1 Distortion Pedal, Boss DD-7 Digital Delay Pedal, Boss NS-2 Noise Suppressor Pedal, and a Blue encore 100i microphone, recording into Studio One V3. Not only is the sound crystal clear, but the guitar players always gravitate towards this Cabinet for some reason. They are lightweight, smaller than other cabinets dimensionally, and plain ROCK! Where else can you get a powerhouse full stack Marshall for $500.00 Special thanks to Randy Akins. Always helpful and knows how to give a customer a great experience!
Music background: Multi instrument musician, home studio owner FB/Fatdogstudios

Marshall tone at a great price

4 Celestion speakers checkLightweight check Can my 100 watt Rockerverb Power it checkCan i afford it yes.because at 259$ it is beyond a good deal and the easiest solution from bedroom rocking to on stage gigging so good that ive been using it at all my gigs for over three years

Love My Marshall!

After receiving everything I purchased, I am extremely satisfied with all the products I received. Sweetwater came through for me and saved me a lot of money. Their sales staff is second to none. This Marshall MG412B cabinet is awesome, sounds excellent, and rocks the whole neighborhood. So turn it down if you don't want the police showing up. Excellent sound. Thank you to Sweetwater and too Marshall for selling excellent products like this. Thank you once again.
Music background: Student Player

Custom built stack

Don't know how Marshall keeps the price down and I ain't gonna ask. I wanted to experiment with another companies head but didn't want to take a chance with any other cabinet but Marshall. I'm glad my sales engineer, Ed Needler, was there to advise on my creation. Thanks Ed, Thanks Marshall.
Music background: Semi-Pro
See also: Amp Cabinets, Marshall, Marshall Guitar Amp Cabinets