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The excellent MB2 Ultra Light Bass amplifier head is fully equipped with professional features: master and gain, padded input, contour, 4-band active EQ, footswitchable boost, tuning mute, effects loop, isolated DI, Speakon combo outputs, headphone/line out, and 500W of power into 4-ohm loads.

Gallien-Krueger MB2-500 Ultra Light Bass Amplifier Head Features:

  • 500W at 4 ohms, 350W at 8 ohms
  • 10dB pad
  • Tuning Mute
  • Input Gain, Master
  • Contour
  • 4-band active EQ
  • Footswitchable boost with independent volume
  • Effects Loop & Tuner out
  • Transformer Isolated DI out with Pre/Post Switch and Ground Lift
  • Dual Speakon Combo Outputs
  • Headphone/Line Out
  • Footswitch Input

Lighten your load and beef up your sound. Order the MB2 today!

Gallien-Krueger MB2-500 Ultra Light Bass Amplifier Head Specifications:

  • Dimensions: 11"W x 1-3/4"H x 7-3/4"D
  • Weight: 3 lbs.12 oz.

Gallien-Krueger MB2-500 Ultra Light Bass Amplifier Head

Write A Review

Average of 8 User Ratings

Overall

Overall: 7.29

Quality

Quality: 7.14

Features

Features: 8.71

Value

Value: 7.00

Customer Reviews

Overall

Overall: 3

Quality

Quality: 1

Features

Features: 9

Value

Value: 3

great lil amp which couldn't
Posted by cyclo from east coast on Jan 23, 2010
Experience w/product: I own it
Reviewer's Background: active
Reviewer's Play Style: rock/world
great idea, great tone, unfortunately very questionable execution, probably the worse GK product of all times.

1st amp was noisy out of the box with very poor signal to noise ratio and was only usable with treble turned down to <30%, 2nd one was better but boost is not usable, and after ~1hr at ~150wt volume starts breaking up and shutting down due to elevated level noise.

Funny thing that all problems centered around pre-amp/tone section, running directly into power amp via external pre-amp produces zero noise.

Don't buy it get RB700 if you are after GK tone.

Overall

Overall: 10

Quality

Quality: 10

Features

Features: 10

Value

Value: 10

Little Box O' Thunder
Posted by Jaco Von Funkenheimer from Triangle, North Carolina on Aug 9, 2009
Experience w/product: I own it
Reviewer's Background: Gigging Musician, Sound Engineer
Reviewer's Play Style: Blues, R & B, Rock
“What ‘cha got there, some little pre-amp?” said a fellow bassist looking at the MB2-500 perched on my Trace Elliot 4X10. “No, my friend, that is the 500 watt Thunder Box!"

GK's MB2-500 is light, compact, simply laid out, and yet has the tone shaping circuitry to get a wide variety of sounds. Take the Contour and Boost knobs for a spin, and use the well thought out EQ to find the tone you like. Leave the DI box at home, as the unit has an XLR out that can be set for pre or post, and a ground lift switch. I love the tuner output, and although I’ll probably never use the effect send/return, it’s nice to know they’re there. The combination Speakon/1/4 inch outputs are innovative and save real estate on the back panel.

Oh, and this thing CRANKS. The first gig I played with it was an outdoor show, and it had plenty of power with headroom to spare. And did I mention it’s light? Less than 4 pounds – unbelievable.

Overall

Overall: 10

Quality

Quality: 10

Features

Features: 10

Value

Value: 10

David beats Goliath
Posted by Snap from New Orleans,La. on May 19, 2009
Experience w/product: I own it
Reviewer's Background: Giging Musician
Reviewer's Play Style: Funk, Smooth Jazz, R&B, Gospel,etc.
I played on a show with another band and the other bass player had a big 1000 watt amp with 8-10 cab. I saw them looking at my little GK Micro Rig with 2-12 cabs. When I played my 12 string bass through it they were blown away!! I didnt have to go past 3 on the volume. WOW

Overall

Overall: 2

Quality

Quality: 1

Features

Features: 5

Value

Value: 1

unreliable
Posted by villain32 on May 16, 2009
Experience w/product: I have used it
Reviewer's Background: active musician
Reviewer's Play Style: rock
I have a GK combo amp & cab that I love (except for the weight), so I was intrigued when I got to play through this at a show. The bands that night shared their backline. Everything went smoothly for me, but this amp shut itself off mid-song for 2 other bassists. The power light would turn orange and then nothing. It would come back on only to shut itself off again a few bars later. In fairness, these bassists are pretty loud and heavy, and the amp was working hard all night long. Shutting off unexpectedly is unacceptable though.

Overall

Overall: 10

Quality

Quality: 10

Features

Features: 10

Value

Value: 10

Amazing!
Posted by BbBassman from Brooklyn on Apr 20, 2009
Experience w/product: I own it
Reviewer's Background: performer/teacher
Reviewer's Play Style: rock
I could not believe how much sound comes out of this little amp! I've been playing for years and have owned lots of amps. Love that big GK tone! A++++

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Gallien-Krueger MB2-500 Ultra Light Bass Amplifier Head

Overall: 7.29Read 8 Reviews

$499.00

MSRP: $714.00 Savings: $215.00(30%)

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Gallien-Krueger MB2-500 Ultra Light Bass Amplifier Head

Overall: 7.29Read 7 Reviews

MSRP: $714.00

Used Products are rated and sorted by Condition. Used products with Conditions 1-3 can be returned in accordance with our standard return policy. Used items with Conditions 4 and 5 are sold AS-IS and are NON-RETURNABLE. Our Lowest Price Guarantee DOES NOT apply to any used gear we sell.

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