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Gallien-Krueger MB150S/112 MicroBass 1x12" 150-Watt Bass Combo , this item is no longer available, below are some similar products you may be interested in.

Gallien-Krueger MB150S/112 MicroBass 1x12" 150-Watt Bass Combo

150W, 1 x 12" Bass Combo Amplifier with 4-band EQ, XLR Direct Output, and Effects Loop
Item ID: MB150S112
Sorry, the Gallien-Krueger MB150S/112 MicroBass 1x12" 150-Watt Bass Combo is no longer available. We've left this page up for reference only.
Check out the great alternatives on this page or call toll-free (800) 222-4700 to speak with a Sweetwater Sales Engineer about similar products.
Gallien-Krueger MB150S/112 MicroBass 1x12" 150-Watt Bass Combo
Gallien-Krueger MB150S/112 MicroBass 1x12" 150-Watt Bass Combo
Gallien-Krueger MB150S/112 MicroBass 1x12" 150-Watt Bass Combo

Small Bass Amp, Big Sound

This article was Written By

Our Product Research Team

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The Gallien-Krueger MB150S-112 combo bass amp has long been known as a favorite among many of the biggest session players in the music industry. This compact amp, part of the MicroBass series, has big tone and a very flexible EQ, so you can dial in your desired sound. Even though the MB150S-112 is small in size, it is extremely durable and ready for the rigors of the road. An XLR direct output, a line output, and an effects loop ensure you are ready for any situation.

Gallien-Krueger MB150S-112 Combo Bass Amp at a Glance:
  • Big sound and powerful tone controls
  • Solid construction and durability
  • Extremely functional
Big sound and powerful tone controls

The 12" speaker pumps out 100 watts of power, and if you need more you can hook up an extension cabinet for a total of 150 watts out of the MB150S-112. This isn't a wimpy little 150 watts - this is a surprisingly loud and defined sound. The active 4-band EQ lets you dial in the exact tone you are looking for quickly and easily. To further sculpt your perfect sound, Gallien-Krueger has included an adjustable contour and high boost contro and a low cut button. Dial in your tone and start playing.

Solid construction and durability

Gallien-Krueger has been long known for their great-sounding amps. The MicroBass series is one of the standards for high quality compact bass amps (and by compact we mean it only weighs 26 lbs.) The amp chassis is made from sturdy, welded aluminum that is durable enough for the roughest of tours. The MB150S-112 combo will give you years of faithful, tone-filled service.

Extremely functional

As a gigging musician you need to be flexible and have gear that is flexible, too. The Gallien-Krueger MB150S-112 is ready for pretty much anything. An effects loop lets you utilize your favorite pedals after the EQ section of the amp. An XLR direct out sends your signal out pre-EQ, and has a ground lift switch. A 1/4-inch line-out sends a line level signal post-EQ that can be used with a direct box or another power amp. The MicroBass also features a headphone out jack for silent practicing.

Gallien-Krueger MB150S-112 Combo Bass Amp Features:
  • 100 watts through 1 x 12" speaker
  • 4-band active EQ
  • XLR direct output
  • Lightweight and compact
  • Headphone output
No matter what your need is, the compact Gallien-Krueger MB150S-112 combo bass amp has you covered!

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

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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.