Gallien-Krueger MB800 800-Watt Bass Amplifier Head


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MSRP: $999.00 $699.00 Save : $300.00 (30%)
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MSRP: $999.00 $699.00 Save : $300.00 (30%)
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Continuing the evolution of the MB series, the Gallien-Krueger MB800 features incredible output, increased functionality and a completely discreet FET (field effect transistor) driven preamp. With 800 massive "GK watts" of power, the MB800 can handle even the largest venues without breaking a sweat, and at 4.9 lbs. neither will your roadie.

All of the controls of the Gallien-Krueger MB800 are lit to indicate the current operating status including; input clip, tuning mute, Gain A, Gain B/Level-B, power amp clipping, limiter enable and EQ/Contour settings. The same FET technology used to create the legendary boost (G.I.V.E.) circuit found in all GK amplifiers for over 30 years is used in every stage of the MB800 preamp. Using FET devices to drive the GK four band active EQ, Contour and Gain allows the MB800 to transition seamlessly from a full, warm, clean tone to full on GK growl.


  • 800 watts @ 4 ohms or 500 watts @ 8 ohms
  • Discreet FET preamp
  • Push activated Gain A/B and limiter defeat
  • 10dB pad
  • Four band active EQ w/variable contour
  • Effects loop & tuner mute
  • XLR out, pre/post EQ
  • Defeatable limiter
  • Two speakon outputs
  • Headphone/line output
  • 10.75" x 8.5" x 1.75"
  • 4.9 lbs.

Order your Gallien-Krueger MB800 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


by PowerReviews
Gallien-Krueger Mb800 800-Watt Bass Amplifier Head

(based on 1 review)

Reviewed by 1 customer

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GK MB800


from Pittsburgh

Verified Buyer

Comments about Gallien-Krueger Mb800 800-Watt Bass Amplifier Head:

I have an MB500 as well, the MB800 give me the head room I need, now the 500 is my back up. Thank you GK

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Series MB
Model 302-0690-A; MB-800
Warranty Info:

MB800 800-Watt Bass Amplifier Head

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