Description
Don’t let the size fool you. The MB150S-112 packs a heavy-magnet 12″ driver and 150 watts RMS into an all-metal cabinet that tips the scale at just 24 lbs — light enough to carry as a carry-on, tough enough to survive a van full of gear. This is GK’s answer for bassists who want real low-end without the back strain.
- 150W RMS through a heavy-duty 12″ speaker
- Rugged all-metal cabinet at only 24 lbs
- 4-band EQ for shaping your tone on the fly
- User-activated limiter to keep things clean under pressure
- Direct outs for feeding a PA or recording rig
- Speaker off switch plus support for 2 x 8-ohm cabs when you need more air moved
Small enough for practice rooms and coffeehouse gigs, it also doubles as a personal stage monitor — set it on a stand, run your signal to the house through the direct out, and let the MB150S-112 handle your own feedback loop. When a bigger stage calls for more volume, kill the internal speaker and drive a pair of 8-ohm cabinets instead. The 4-band EQ gives you enough control to dial in anything from a round jazz thump to a snappier slap tone, and the built-in limiter means you can push the amp without worrying about ugly distortion creeping in.
Backed by a 1-year warranty on the speaker and 2 years on the electronics, this combo is built for bassists who need dependable tone in a package that actually travels.






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