Gallien-Krueger MB108 1x8" 25-Watt Bass Combo

25W, 1 x 8" Bass Combo Amplifier with Digital Power Amp, 3-band EQ, 1/8" Aux in, and 1/8" Headphone Out
Gallien-Krueger MB108 1x8
Gallien-Krueger MB108 1x8
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Gallien-Krueger MB108 1x8" 25-Watt Bass Combo
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Ditch the Bulk, Not the Tone!

Everyone needs a practice amp, and the ultra-portable MB108 combo bass amplifier by Gallien-Krueger is just the thing to satisfy any serious player. It may be small, but this 25-watt, 1 x 8" bass combo provides you with an impressing amount of punch, clarity, and volume. A 3-band EQ lets you dial in the tone for any bass you play or space you play in. For solo practice, you really can't complain about the simple 1/8" aux in and headphone out, and when you need a grab-and-go amp you can toss in your car without folding down the seats, you'll be mighty glad you picked up this Gallien-Krueger MB108.

Gallien-Krueger MB108 Combo Bass Amplifier at a Glance:
  • Surprisingly loud for such a tiny bass amp
  • Grab-and-go convenience for any bass-playing occasion
  • Perfect for rocking out solo or jamming along to your tunes
Surprisingly loud for such a tiny bass amp

How loud can a 25-watt bass amp really be? Plug into a Gallien-Krueger MB108 combo and you'll get the picture. While you may not be shaking the foundation of your local arena any time soon, you will have more than enough volume to fill your garage, living room, or other practice space with ease. The 8" ceramic Paragon speaker delivers nice and punchy lows with enough midrange definition that you can articulate notes clearly without tubbing out.

Grab-and-go convenience for any bass-playing occasion

Even at Sweetwater, where we have access to the hottest bass rigs around, many of us still rely on small practice amps like the GK MB108 all the time. After all, who wants to haul around a half stack when you just want to jam with your friends? With an MB108, you can comfortably toss your gear in the passenger seat and take off to wherever the music's happening. What's more, this undersized amp offers a full 3-band EQ, so you can get the best possible sound no matter where you end up or what bass you plug in.

Perfect for rocking out solo or jamming along to your tunes

Sometimes, woodshedding is the only way to make an important passage stick. But you don't have to subject your family and neighbors to your laborious repetition when you practice solo with your MB108 combo bass amp. That's because Gallien-Krueger gave the MB108 a dedicated 1/8" headphone output. At the same time, they also hooked you up with an 1/8" stereo input, so you can plug in your smartphone or portable media player and play along to your favorite songs.

Gallien-Krueger MB108 Combo Bass Amplifier Features:
  • Power and punch packed into a perfectly portable bass combo amplifier
  • 25 watts pushing an 8" ceramic Paragon speaker delivers tons of volume and focused punch
  • 3-band EQ lets you dial in your sound no matter what bass you plug in or where you play
  • Plug your portable media player into the 1/8" stereo auxiliary and rock out with your tunes
  • Connect a set of headphones and rock out without disturbing the neighbors
For practice, rehearsal, and even small gigs, the Gallien-Krueger MB108 combo bass amp delivers!

Additional Media

Bass Guitar Amp Buying Guide

Tech Specs

Type Solid State
Number of Channels 1
Total Power 25W
Speakers 1 x 8"
EQ 3-band (Active)
Inputs 1 x 1/4", 1 x 1/8" (aux in)
Outputs 1 x 1/8" (headphones)
Height 15.5"
Width 12.5"
Depth 14.5"
Weight 17 lbs.
Manufacturer Part Number 303-0810-A

Customer Reviews

Based on 7 reviews
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Great for Guitar Also!

My normal rig is a GK 400RB through a 1x12, and I expected a 25-watt 1x8 to sound pretty bad compared to it, just as a Marshall 1x8 doesn't hold a candle to a 1x12 tube amp combo. However, I was surprised at how good this little practice amp sounds. Sitting in the living room by myself, I run the gain at 9:00, and it's loud enough to get a nice sound without having neighbors complain. I've played it using a Stingray and a Ric, and it consistently puts a smile on my face. It could *maybe* do a small gig although I'd be a little concerned about headroom; I'd guess the 1x10 100W MB110 combo would be the better choice for performing. The EQ is active and fairly powerful; I like running the Treble and Mid at 12:00 and the Bass at 10:30. For playing at home alone, I find myself not missing the 400RB and bigger cab and speaker.For small practice combos, I've had a Marshall MB30 (30W 1x10) and an Ashdown 30W 1x8, and I think this GK is the better amp. With the other two, I was constantly trying to tweak the controls to get a good sound, but with the GK, it's been "set it and forget it".What surprised me, however, is how good this amp sounds with an electric guitar. For kicks, I plugged in with my PRS, and the sound quality just blows away every solid-state guitar amp I've ever tried, despite it only having an 8" speaker. The cleans almost sound as good as a tube amp. If you want the Vox sound, get Vox; if you want the Marshall sound, get Marshall. However, I'd highly recommend this combo to any guitar player looking for a great sounding solid-state practice amp that's not big or heavy or expensive. Add your favorite overdrive or distortion pedal, along with delay or reverb, and you're all set. Sure, it's $ more than, say, a Marshall MG15, and it doesn't have distortion or reverb, but it's well worth the extra money -- the sound quality is that good.It even worked nicely to amplify my daughter's Yamaha digital piano and a relative's iPod (for dance music) at a family party.Another reviewer described this as a "sleeper product." I whole-heartedly agree! This really is the best-kept secret in small practice combos for both bass and guitar.

Best little practice amp available!

I just received my new practice amp in the mail. This is a sleeper product--meaning that it is the best kept secret practice tool for the size and money. After removing it from the GK factory box, I noticed that it was larger than it appears in photos--but still light and easy to carry. I think the extra depth (14.5") made it possible for the little box to sound much deeper and fuller than other similar practice amps. There was an introductory manual and warranty card included in the box. The amp is covered in a modern looking black Tolex and the cab is made of 1/2" plywood. It feels very sturdy and light. The grill is a subtle black sheen cloth. I could tell quality control was Job One on this amp, it showed in the product as a whole. There are four controls-- volume, treble, mid, and bass. The controls are active so the tone can have wide variations for your bass. The knobs moved very deliberately and felt high quality. It has a 1/8" input and a 1/8" output if you want to practice with headphones. There is no line out but that's probably not an issue because this amp is designed for small practice use, which is does very well. At first play, I flat-lined all tone controls on my active bass and the amp (bass controls: center detente is flat, on the amp: all tone controls on 5). It had great tone and there was a surprising bit of thump and presence for a little guy. I actually pushed the amp to about 3:00 volume and it got pretty loud in the living room. I could imagine it could be used in a quiet practice or small church situation, but the MB110 would be better suited. This amp is a bit more expensive for a small practice amp at $150-- but to my eyes and ears it's well worth the money. I played for three hours tonight-- amazed at how quickly the time flew by while enjoying the full punchy tone. I'm very happy with my purchase. This amp is highly recommended. This would be easy to take on the road for hotel room band practices.
Music background: Professional bass player and solo performer

Great sounding little amp

I bought this for home use in the living room and bedroom to practice at lower volumes. I didn't expect much but wanted to get away from using headphones all the time. I toyed with the idea of getting one of the larger models MB112 etc. but decided that it would be overkill and not useable (for me) to gig with anyway. This is an exceptionally well constructed little amp, its heavier than it looks and seems very sturdy. It looks nice just sitting in the corner, and is small enough for my wife to not complain. It is more than loud enough for me. I run the gain at 10:00 and it can get a lot louder. I could see this as a great option for acoustic coffee house type gigs. Maybe even supporting a double bass? The EQ is simple and responsive. Nice clean tones from this. I run my BDDI into it as well and it gets even better. Im very happy with this purchase! Thanks Sweetwater!
Music background: Hobbyist

Great little amp

i bought this with only the intention of using in my bedroom or maybe on small acoustic gigs. so far i've only used it in my bedroom, but i am pretty blown away by the clarity on this amp! i highly recommend it if you want a solid bedroom amp.

Great sounding Amp

This is a great sounding amp, compared to some others I've heard. The price was right, and the customer service was excellent!
See also: Bass Combo Amps, Gallien-Krueger, Gallien-Krueger Bass Guitar Combo Amps