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Gallien-Krueger 400RB-IV 280W Bass Head  Black 

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GK's RB Series bass amplifiers have been setting the standard for over two decades and the 280W 400RB-IV continues that tradition. Inside this compac...Read More

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See All Gallien-Krueger Solid State Bass Amplifier Heads

A powerful 280W solid state with the warm feel and sound of a tube head.

GK's RB Series bass amplifiers have been setting the standard for over two decades and the 280W 400RB-IV continues that tradition. Inside this compact, lightweight ‘superstructure' 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 400RB-IV Series bass head delivers 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. Every day thousands of players around the world in arenas, clubs and basements plug into GK heads because they love that sound.

  • 280 watts (4 ohms)
  • 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/post switch
  • Speakon & 1/4″ outputs

Fall in love with GK today. Order now!


400RB-IV 280W Bass Head

  • 19"W x 3.5"H x 8"D (2 space)
  • 16.5 lb.

Review Snapshot®

by PowerReviews
Gallien-Krueger400RB-IV 280W Bass Head

(based on 1 review)

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Reviewed by 1 customer

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(1 of 1 customers found this review helpful)



By Trevor the Bass Gawd

from Columbus, OH

About Me Experienced


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


    Best Uses

    • Events
    • Home Studio
    • Performances

    Comments about Gallien-Krueger 400RB-IV 280W Bass Head:

    I have owned this amp for months now and I cannot be happier. I run it through a Tech 21 4/10 cab and play my Ibanez SR 885 bass through it. The tone really is something else. You can go from punchy Mike Gordon like tone to a warm round Phil Lesh esq tone. This handles bass bombs perfectly too. I love the 4/5 string switch as I have both!

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