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Gallien-Krueger MB500 500-Watt Bass Amplifier Head


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MSRP: Old Price $827.00 Discounted Price $579.00 Save : $248.00 (30%)
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MSRP: Old Price $827.00 Discounted Price $579.00 Save : $248.00 (30%)
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Weighing in at less than 4 lbs. and taking up less than one rack space, the Gallien-Krueger MB500 delivers 500 watts of power in a package that will easily fit into your gig bag. Featuring GK’s legendary four band active EQ and contour control, the MB500 allows you to tweak your tone before hitting the digital power section. In addition to the generous tone shaping capabilities, the preamp section also features a foot switchable boost channel with independent volume control to dial in just the right amount of grind and level boost when needed. The Gallien-Krueger MB500 features an aluminum enclosure, digital power supply and power amplifier as well as unique signal management circuitry, allowing it to deliver high volume while retaining punch and dynamics.


  • 500W @4-Ohms
  • Digital power amp
  • Solid state preamp
  • Four band active EQ
  • Speakon output
  • Headphone/chain/line output (selectable)
  • XLR out, pre/post EQ
  • 10.75" x 9" x 1.75"
  • 3.75 lbs.

Order your Gallien-Krueger MB500 from Sam Ash Direct today with the security of our 45/60 day return/price protection policy, and be sure to take advantage of our fast, free shipping.

Things You Will Get:

  • Bass Amplifier Head
  • Cable

Fine head for the $$$


So far I'm quite happy with my new GK MB500 head. I play in a blues band and in our niche I don't need a lot of bells and whistles. This head gives me all I need to dial in a complementary sound for either my fretted or fretless basses. 500 watts gives me plenty of headroom. I'm glad I made the move to this head! Should have considered it sooner...



MB500 500-Watt Bass Amplifier Head

5.0 1


Series MB
Model 302-0510-B; MB500
Warranty Info:

MB500 500-Watt Bass Amplifier Head

Two years parts and labor, one year on speakers and cabinets