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Top Rated
Gallien-Krueger Logo
SKU 
423659 000000000

Gallien-Krueger MB500 500W Ultra Light Bass Amp Head  

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Weighing in at fewer than 4 lb. and taking up less than one rackspace, the MB500 delivers 500W of signature GK tone in a sleek, compact, modern head....Read More

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  • MSRP:
    $714.00
  • Your Savings:
    - $215.00
  • Shipping (48 Contiguous U.S. States)
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  • Your Price:
    $49900

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OVERVIEW

500W of thunder that easily fit in your gig bag.

Weighing in at fewer than 4 lb. and taking up less than one rackspace, the MB500 delivers 500W of signature GK tone in a sleek, compact, modern head. Boasting GK's legendary 4-band active EQ and contour control, the MB500 lets you tweak your tone to perfection before hitting the digital power section.

In addition to its generous tone-shaping capabilities, the preamp section has a footswitchable boost channel with independent volume control to dial in just the right amount of grind and level boost when needed.

The MB500 is stage- and studio-ready with an XLR direct out with pre-/post-EQ selector and ground lift. Also offers a tuner out with mute, FX loop, headphone/line out, and dual Speakon outputs.

FEATURES
  • 500W @ 4 ohms, 350W @ 8 ohms
  • Digital power amp
  • 4-band active EQ with contour switch
  • Footswitchable boost channel
  • Effects loop
  • Tuner out with mute
  • -10dB pad for active instruments
  • XLR out with pre-/post- EQ and ground lift switch
  • Two Speakon outputs
  • Headphone/line out
  • Footswitch included

Pure GK power and tone made fully portable. Order now!

SPECIFICATIONS

MB500 500W Ultra Light Bass Amp Head

  • 4 lb.
  • Width: 10-3/4"
  • Depth: 8-1/2"
  • Height: 1-3/4"
Reviews
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Review Snapshot®

by PowerReviews
Gallien-KruegerMB500 500W Ultra Light Bass Amp Head
 
4.7

(based on 31 reviews)

Ratings Distribution

  • 5 Stars

     

    (26)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

92%

of respondents would recommend this to a friend.

Pros

  • Excellent sound (12)
  • Portable (12)
  • Good power output (11)
  • Easy to use (10)
  • Warm / comfy (8)

Cons

    Best Uses

    • Performances (13)
    • Outdoor events / games (8)
    • Home studio (5)
    • Professional recording (4)
    • Amateur recording (3)
      • Reviewer Profile:
      • Experienced (9), Professional musician (6)

    Most Liked Positive Review

     

    The GK sound in 5lbs

    So far so good. The GK MB500 sounds great, but it took some experimenting to get the tone I wanted, and I had to read the manual.

    The first time...Read complete review

    So far so good. The GK MB500 sounds great, but it took some experimenting to get the tone I wanted, and I had to read the manual.

    The first time I played it during practice, I played it through my practice speaker, an old single 15 cab. I was having a difficult time getting the tone I wanted with my Sting Ray. Lots of low-end, but there was no high end from my G string. I switched to my P-Bass, and things got better. Then I read the manual and tried some of the suggested settings. From there, I started playing around with different controls to get different tones.

    Last night I played live through my Avatar 15" bottom and it sounded it great! It pushed air, with little effort. I was able to get the GK growl along with a punched up low end for blues/rock at a small outdoor event.

    As I said, you need to experiment with the tone controls and start with some of the suggested settings in the manual.

    Here's the best thing about this amp. It fits in your gig-bag.

    VS

    Most Liked Negative Review

     

    Too pricey for the performance

    These days, it seems like you pay premiums for 1) brand name, 2) light weight, or 3) exceptional performance. For me (everybody has their own opinion) this amp scores on...Read complete review

    These days, it seems like you pay premiums for 1) brand name, 2) light weight, or 3) exceptional performance. For me (everybody has their own opinion) this amp scores on the first 2...not so much on the third. But hey, they say 2 outa 3 ain't bad.
    The compressor was OK...just not variable and a little too squashed for me. With the 4-band EQ, I couldn't get a tight, low-end punch without getting boomy, and the contour didn't seem to help at all. I returned it and continue to look at alternatives.
    I play a 5-string Carvin fretted bass, with a humbucker at the bridge and single coil in the middle. Was a little less boomy when I split the humbucker. I also tried my Carvin 5-string fretless with J-bass set-up (2 singles) , and results were similar. Some may discount my review because of the brand, but I've always had great sound from my Carvin's with other amps.

    Reviewed by 31 customers

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    Displaying reviews 1-10

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    1.0

    Thought it was a good fit.

    By Bogartist

    from Bemus Point, NY

    About Me Experienced

    Pros

      Cons

        Best Uses

          Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

          I ordered this head because it was in my price range, portable, and had the power I needed. When it arrived, plugged it in using a speakon adapter with my 1/4 "speaker cable. I got nothing when I plugged into my 1 x 15 Ampeg cabinet (8 ohms) or my 4 x 10 Hartke cab (8 ohms). I called MF and they recommended I buy a speakon to 1/4" speaker cable. I did and it worked for abot a week or so and then nothing again(Power light came on but no sound). Sent it back, got a new one, and it worked for about 3 weeks and then nothing(same problem). Mind you, I only used it for band practice in a stable environment and it did not travel to any gigs. Liked everything about it when it worked. Looking for a new amp head. Buy the extended warranty if you take a chance on it.

          Comment on this review

           
          5.0

          Clean power, great tone

          By ThelowB2

          from Vermont

          About Me Experienced

          Pros

          • Easy To Use
          • Excellent Sound
          • Great tone
          • Portable
          • Powerful

          Cons

          • Have Not Found Any Yet

          Best Uses

          • Amateur Recording
          • Blowing Windows Out
          • Events
          • Home Studio
          • Performances
          • Professional Recording

          Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

          I love this little power house. Crisp clean uncolored tone to GK signature grit. And enough power to blow the windows right out of your house. Hard to believe its only a few pounds. This is my second GK purchase. These guys never cease to amaze me.

          Comment on this review

          (2 of 2 customers found this review helpful)

           
          5.0

          One of the best in the market today !

          By Fendok

          from Guaynabo, PR

          About Me Experienced

          Pros

          • Amazing And Reliable
          • Excellent Sound
          • Good Warmth
          • Portable
          • Powerful

          Cons

          • None

          Best Uses

          • Events
          • Home Studio
          • Performances
          • Professional Recording

          Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

          One of the best amps I have found. Powerfull, all the features of the 1001RB except the Bi-Amp capability in such small package......Amazing !!!!!!!!......and Yeah sounds great too !!!!!!!!!!!!!!
          I personaly recomend this brand to every bassist I meet. I,ve use in church and fill every corner with presence !!!.........we don't have a subwoofer and I'ts not miked !!!!!!

          Comment on this review

          (1 of 1 customers found this review helpful)

           
          5.0

          I like it

          By Al

          from New Orleans

          About Me Professional Musician

          Pros

          • Easy To Use
          • Excellent Sound
          • Good Warmth
          • Portable
          • Powerful
          • Small And Lightweight

          Cons

            Best Uses

            • Home Studio
            • One Nighters
            • Performances

            Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

            I've only used it on 3 gigs and so far I'm happy with this amp. Since this is my 3rd GK, I'm quite familiar with using the four band EQ to dial in the exact sound I want. The contour knob is very useful and the Master B section allows me to get the amp to sound like it would at a loud volume when actually playing at a low volume. It has plenty of power and headroom. I'm happy so far.

            Comment on this review

            (1 of 1 customers found this review helpful)

             
            5.0

            Incredible!

            By BassMann Biff

            from Western New York

            About Me Experienced

            Pros

            • Easy To Use
            • Excellent Sound
            • Portable
            • Powerful

            Cons

              Best Uses

              • Performances

              Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

              As an old-school bassist who was convinced that a rig had to weigh as much as a small car, I couldn't believe that a 4 pound amp could put out so much sound! I have happily found that downsizing doesn't mean sacrificing power, tone, or reliability. Coupling this unit to a 15" cabinet and my Fender Hot Rod Precision bass, gives me everything I need for my various live projects. From coffee houses to concert stages, this amp is it!

              Comment on this review

              (2 of 2 customers found this review helpful)

               
              5.0

              The GK sound in 5lbs

              By Rico

              from Hales Corners, WI

              About Me Experienced

              Pros

              • Easy To Use
              • Excellent Sound
              • Portable

              Cons

                Best Uses

                • Events
                • Performances

                Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

                So far so good. The GK MB500 sounds great, but it took some experimenting to get the tone I wanted, and I had to read the manual.

                The first time I played it during practice, I played it through my practice speaker, an old single 15 cab. I was having a difficult time getting the tone I wanted with my Sting Ray. Lots of low-end, but there was no high end from my G string. I switched to my P-Bass, and things got better. Then I read the manual and tried some of the suggested settings. From there, I started playing around with different controls to get different tones.

                Last night I played live through my Avatar 15" bottom and it sounded it great! It pushed air, with little effort. I was able to get the GK growl along with a punched up low end for blues/rock at a small outdoor event.

                As I said, you need to experiment with the tone controls and start with some of the suggested settings in the manual.

                Here's the best thing about this amp. It fits in your gig-bag.

                Comment on this review

                 
                5.0

                Absolutely amazing!

                By cjam001

                from Harvey, LA

                About Me Professional Musician

                Pros

                • Easy To Use
                • Excellent Sound
                • Good Warmth
                • Portable
                • Powerful

                Cons

                  Best Uses

                  • Amateur Recording
                  • Events
                  • Home Studio
                  • Performances
                  • Professional Recording

                  Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

                  I bought this for my wife and she can pick it up with two fingers and carry it in her purse! It's just that light. The sound is incredible!

                  Comment on this review

                  (1 of 1 customers found this review helpful)

                   
                  5.0

                  My new MB500

                  By Fivestring99

                  from The Republic Of Texas

                  About Me Professional Musician

                  Pros

                  • Easy To Use
                  • Excellent Sound
                  • Good Warmth
                  • Portable
                  • Powerful

                  Cons

                    Best Uses

                    • Amateur Recording
                    • Events
                    • Home Studio
                    • Performances
                    • Professional Recording

                    Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

                    After over 45 years of playing bars and honky-tonks, parties, festivals, weddings, small venues as well as large, I've never had anything like this head. Under 5 pounds but the sound is HUGE! Tones are very versatile. I'm not really crazy about the unmarked controls but I'm getting used to them. I can fit it, the cables, and tuner in a little canvas tote bag my wife padded for me. One trip from the truck and I'm set. This is actually my second MB500. The first one showed up last week with a non-functional boost switch. Christine and Gilberto at G-K were all over it and got me a replacement pronto. No question, no hassles, just fixed the issue. GREAT customer service! It's not my first G-K product by any means and I'm sure it won't be my last.

                    Comment on this review

                     
                    5.0

                    Pedal Steel Players answer to weight pro

                    By L.M.

                    from Augusta, Ga.

                    About Me Professional Musician

                    Pros

                    • Easy To Use
                    • Excellent Sound
                    • Good Warmth
                    • Portable
                    • Powerful

                    Cons

                      Best Uses

                      • Events
                      • Performances

                      Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

                      The best alternative LIGHT weight pedal steel amps on the market. The MB500 has enough power needed to cover any size performance . Works great with any size speaker cab. Lot's less expensive than a good steel amp. I have got two years of hard use on mine, and it has never let me down.

                      Comment on this review

                      (1 of 1 customers found this review helpful)

                       
                      5.0

                      Amazing

                      By garnermike

                      from Raleigh, NC

                      About Me Professional Musician

                      Ask me a question

                      Verified Buyer

                      Pros

                      • Easy To Use
                      • Excellent Sound
                      • Good Warmth
                      • Portable
                      • Powerful

                      Cons

                        Best Uses

                        • Events
                        • Performances

                        Comments about Gallien-Krueger MB500 500W Ultra Light Bass Amp Head:

                        Have owned many bass heads, at least 6 different brands. I was just amazed at the depth, warmth, crispness and bottom of this little G-K head. Used either with an Ampeg (15") and also a Carvin (18")cab, its tonal quality surpasses every other head I've used.

                        Comment on this review

                        Displaying reviews 1-10

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