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Gallien-Krueger MB115-II 1x15" 200W Bass Amp Combo

A portable powerhouse! Featuring a lightweight construction, 4-band active EQ, boost control & 15" USA-designed speaker.




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Order now for delivery to you on Thu 18th Aug 2022.

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SKU: 303-0521-B

    Product Description

    Gargantuan Gallien-Krueger power and tone in portable packages — that's the MB Series II for you! Ranging from 25 watts to 500 watts, these modern bass combo amps deliver peerless performance for contemporary bassists; featuring intuitive sound-sculpting controls, robust plywood constructions, reliable digital power supplies and power amps, and lightweight speakers designed and manufactured by GK in the USA.

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    MB115-II Combo

    The MB115-II is a portable powerhouse! With a 200-watt power amp and ceramic 15" speaker, the MB115-II really packs a punch and has enough volume to effortlessly fill out medium-sized venues. Apart from possessing a bigger speaker than the smaller MB112-II, the MB115-II also has built-in boost and limiter functions, as well as a horn for achieving greater top-end clarity. It's ideal for practice too, with its auxiliary input and headphone output letting you jam along to your favourite tracks in silence.

    Key Features

    • 4-Band Active EQ — Derives from GK's legendary 800RB amp. Provides extensive tone-shaping potential so that you can find the sonic sweet-spot, especially with the 'Hi Mid' and 'Lo Mid' knobs.
    • Contour Control — Completely re-voices the amplifier by tuning between two different shaping circuits, with greatly different responses. When the the control is engaged, the low-end is slightly boosted, the mids are scooped, and the high-end is pushed up.
    • Variable Q — Another feature inherited from the 800RB. This unique design varies the EQ bandwidth to retain a musical response even at extreme settings. In other words, it's hard to make the MB115-II sound bad!
    • USA-Designed Speaker — The special ceramic driver with 2.5" edge wound aluminium voice coil, designed just for this cabinet, is manufactured in the GK USA factory.
    • Boost & Limiter — Attain that legendary Gallien-Krueger "growl" by turning up the MB115-II's dedicated boost control. Engage the limiter to prevent distortion; designed if you're playing anything loud like bombastic slap techniques!
    • Built-In Horn — Switch on the high-frequency tweeter to get some extra top-end spank or "air"; ideal for cutting through the mix.
    • Lightweight Design — Internal bracing minimises tone-robbing leakage of sound through the walls of the cabinet. Plywood construction, aluminium chassis, switch mode power supply and power amp deliver 200W performance in a rugged 38lb (17.2kg) package.
    • Contemporary Connectivity — Balanced DI with pre/post switch, aux in and headphone output for silent practice, plus "chain out" to drive GK's MBP powered enclosures (pair with the 115 MBP).
    • Switch Mode Power — Extremely lightweight switch mode power supply and power amp deliver 200W into the speaker with very little wasted heat dissipation.
    • Critically Damped — The amp's port is specifically tuned for optimum performance, coupled with a particular jute blend of damping material that provides the right amount of damping at certain frequencies.
    • Smart Protection Circuitry — Constantly monitors for unsafe operating conditions such as short circuits, mis-wired speaker cables, blown speakers, improper ventilation, and incorrect speaker configurations.


    • Speaker: 1x15" Ceramic
    • Output Power: 200W (at 4 Ohms)

    Input Section

    • Maximum Input Level: 0.6V rms
    • Input Impedance: 1M Ohms
    • Direct Output Impedance: 500 Ohms
    • Aux-In Input Impedance: 100K Ohms


    • Bass: +/-10dB@60Hz
    • Lo-Mid: +6dB/-10dB@250Hz
    • Hi-Mid: +6dB/-10dB@1KHz
    • Treble: +/-14dB @ 7KHz

    Voicing Filters

    • Contour: +2dB@50Hz/-10dB@500Hz/+3dB@7KHz

    Dimensions & Weight

    • Dimensions (H x W x D): 23" x 19" x 14.5"
    • Weight: 38.0 lbs
    Elliot Stent author picture

    Written by Elliot Stent

    Amp Type
    Solid State
    Gallien-Krueger USA Ceramic
    Effects Loop
    Number of Channels
    Trade Doubler Group ID
    Speaker Size
    Speaker Sim
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    Here at Andertons Music Co. we believe that we stock some of the best musical equipment in the world. That's why we want to make it as quick and easy as possible for you to get your order, safe and sound!

    We offer a wide range of delivery options to help fit around your busy lifestyle without compromise. This includes free, named-day delivery for most UK postcodes on orders over £99 which are in stock, Saturday & Sunday deliveries, and competitive delivery rates worldwide.

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    Customer Reviews


    4 reviews





    Trusted Customer24th Mar 2020

    Its a brilliant little combo, with a huge sound!

    Value 4Looks 4Durability 4Sound 5

    Mr John Lappin12th Jan 2020

    Can't fault it so far, haven't used extensively but sounds good.

    Value 4Looks 4Sound 4

    Dr Wendy Adams4th Apr 2019

    Great sound. High quality .

    Mr Gordon Smith20th Jun 2017

    Absolutely suits my needs. Competitive price.

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