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Gallien-Krueger 400RB-IV
280 Watt Bass Amplifier

Item: GK3020240B

The Gallien-Krueger 400RB-IV head is a flexible, state-of-the-art bass amplifier, designed to deliver maximum performance, and be simple to operate. This is accomplished by having an extremely high current power supply and power amp circuitry, which gets the sound out of your head, four bass specific bands of active equalization for precise tone control, and three voicing filters for shaping and customizing your sound.

RB Series bass amplifiers have been setting the standard for over two decades. Inside these compact. lightweight "super structures" is the most advanced bass circuitry available. In 1972, Bob Gallien developed what he calls G.I.V.E. Technology (Gate Induced Valve Effect). This 'valve effect' is integrated into the design of all RB Series heads and is part of what gives them their distinct sound. The RB Series heads deliver a warm, punchy tone with a fast transient response that not only sounds better, it feels better. GK's renowned voicing filters and intuitive four band active EQ make it simple to dial in a great sound. Everyday thousands of players around the world in arenas, clubs and basements plug into GK heads because they love that sound.

Gallien-Krueger 400RB-IV
280 Watt Bass Amplifier

  • 280 Watts (4ohms)
  • Active 4-band EQ
  • Three Voicing Filters
  • Effects Loop & Tuner Out with Mute
  • Rack Mountable (2 Rack Spaces)
  • Designed and built in the US


  • 280 Watts (4ohms)
  • Active 4-band EQ
  • Adjustable Contour, Presence & 4/5 String Voicing
  • Boost (Valve Effect)
  • Effects Loop & Tuner Out with Mute
  • XLR Out with Level, Ground Lift & Pre/Postswitch
  • Speakon & 1/4" Outputs
  • 19" W x 3.5" H x 8" D (2 Rack Spaces)
  • 16.5 Lbs


  • Rack Mount Ears with Hardware
  • Power Cord 
  • Owner’s Manual
  • Two Year GK Warranty

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GK3020240B - 400RB-IV
280 Watt Bass Amplifier
Price $499.00

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