Gallien-Krueger MB500 500-Watt Ultra Light Micro Bass Head

500-watt Bass Amplifier Head with 4-band Active EQ, 10dB Pad, and Boost Switch
Gallien-Krueger MB500 500-Watt Ultra Light Micro Bass Head image 1
Gallien-Krueger MB500 500-Watt Ultra Light Micro Bass Head image 1
Sweetwater Savings: $220.70 MSRP: $749.70
Or make 3 easy payments
Special Financing - Ends Jul 6

Or just $15/month§ for 36 months

0% interest for 36 months**. 36 equal monthly payments required. Valid through 7/6/2017. Learn more

Or make 3 easy payments of $176.33/month!

Plus $10 processing fee. Use any credit card! Sweetwater's Flexible Payment Plan lets you get your gear now and stretch your payments over time. Plus, we won't charge interest! Learn more

In Stock!
Available for immediate delivery!

Share this with your friends:

Most popular accessories & related items...

Gallien-Krueger MB500 500-Watt Ultra Light Micro Bass Head
In Stock!

This Lightweight Bass Head Really Packs a Punch!

Gallien-Krueger has always believed in doing things their own way, creating innovative products to meet the demands of bass players all over the world. The Gallien-Krueger MB500 bass head amplifier is perfect for any bass player on the go. It delivers 500 watts of power in a less-than-1U amp that weighs under 4 lbs. - easily small enough to fit in your gig bag. The MB500 also gives you powerful tone-shaping options, including an active 4-band EQ that's equipped with a contour switch and a footswitchable boost control that lets you kick in extra punch when you need it. You'll love the quality, flexibility, and portability that the MB500 adds to your rig!

Gallien-Krueger MB500 Bass Amp Head Features at a Glance:
  • 500 watts at 4 ohms or 350 watts at 8 ohms
  • 10dB pad
  • 4-band active EQ with variable contour
  • Effects loop and tuner output with mute
  • 1/4" headphone/line output
  • XLR output (pre/post EQ and ground-lift switch)
  • Boost control (footswitchable)
  • Switchable limiter
  • 2 speakON outputs
For a flexible bass head that's small enough and light enough to go anywhere, check out the Gallien-Krueger MB500!

Additional Media

Bass Guitar Amp Buying Guide
Tuner on a Sidechain
Gallien-Krueger MB Series Bass Amplifier Heads Overview

Tech Specs

Type Solid State
Number of Channels 1
Total Power 500W
Effects Yes
EQ 4-band
Inputs 1 x Instrument
Outputs 2 x speakON, 1 x XLR, 1 x Tuner, 1 x Headphone/Line (1/4")
Footswitch I/O Yes
Effects Loop Yes
Height 1.75"
Width 10.75"
Depth 8.5"
Weight 4 lbs.
Manufacturer Part Number 302-0510-B

Customer Reviews

Based on 21 reviews
Write your review

Gallien-Krueger MB500

First off this amp head is super. Man I can dial in just the right sound and this thing puts out some sound. I ordered this amp head and had it in two days, hard to believe. Sweetwater followed up with a phone call and truly seemed like they cared. I am planning to order all my gear from them from now on.
Music background: Im 65, been playing since I was a teen and play in two bands now.


this amp is everything I thought it would kicks,,it has hugh power and tone..I like the eqing makes it easy to set up..and every time I turn it on somebody says I can.t believe that sound is coming from a 4.7lb amp..I WOULD recomend this amp to anybody who wants a great bass sound..and its made in the USA !!!!
Music background: 40 year pro store owner..

Gallien Krueger MB500 micro sized bass amp with super size features.

1st impressions: This is one pretty shiny little thing, amazing something so small and light can have all these features and power. It is well put together although there is a slight sound on the shake test. My only issue so far is the placement of the limiter switch, this switch could be damaged if rack mounted, would rather it was on back panel. Thru my Walter Box 1x10 it is surprisingly warm but much of that is an artifact of the speaker, it easily fills the room with warm round bass, perfect for those little sit down gigs or for recording. The small footswitch included for boost is a nice size with detachable cable and includes a status LED, nice touch. I transport my pedal board in a keyboard bag and the MB500 fits in the front pocket perfectly, very handy. First gig with a loud rock band pushing a 2x15 EV & 1x12H was loud and clear, with the master half way up was plenty loud and the DI out worked flawlessly. 2nd gig was a moderate volume outdoor jazz thru a 1x15 and once again the MB500 shined thru nicely.
Music background: Bassist, studio engineer and producer

Good Head

I bought this head a week ago and was a lil skeptical about it at first.. but once i plugged it in, omg it was amazing. The sound and to be this small is very powerful. has a lot of range. I will recommand dis head to anyone..
Music background: Church, Gospel, Concerts

MB500 bass amp

I've used GK gear for decades. This amp design is the best yet for my needs. Power and tone shaping are superb. Amp, cables, and foot switch all fit nicely into a shoulder brief. Sweetwater always steers me right.
Music background: Part time pro
See also: Bass Amp Heads, Gallien-Krueger, Gallien-Krueger Bass Guitar Amp Heads