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Ultra Portable Performance

Effortless transport for rehearsals and 500 watts of power through the internal speakers allow you to be heard even in large venues

Custom Speaker Design

Speakers designed and manufactured by GK in the U.S.A. using lightweight Neodymium magnets 

Ultra Light Weight Chambered Design with Tuned Ports

Plywood construction, aluminum chassis, switch mode power supply and power amp deliver 500W performance in a rugged 51lb package. Each speaker pair is isolated in it's own chamber eliminating tone robbing standing waves sound leakage through the cabinet walls. Our design team tuned the ports for optimum performance while coupled to the cabinets specific designed speakers. 

Variable Q

Inherited from the 800RB, this unique design varies the EQ bandwidth to retain a musical response even at extreme settings

Tone Shaping

4 band active EQ and contour based on the legendary 800RB provide extensive tone shaping capability


Balanced DI , aux in and headphone output for silent practice plus "chain out" to drive GK's MBP powered enclosures 

GK MB 410-II 500W 4x10" U. L. Combo

SKU: 303-0720-B

Output Power:

500W@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


  • +/-10dB@60Hz


  • +6dB/-10dB@250Hz


  • +6dB/-10dB@1KHz


  • +/-14dB @ 7KHz

Voicing Filters:

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


  • -90 dB reference to 500W, ‘A’ weighted

Dimensions (HxWxD):

  • 23“x23”x16”


  • 51 lbs.
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