Flash Deals: New Deals Just AddedShop now »
Top Seller

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

Item #: 
  • Write a Review

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 advance... Read More

Your Price:
Add to Wish List
GC Gear Card
Special Financing Offers
Learn More
  Pick Up In Store
Ship to Store Englewood, CO (3.11  mi) See more stores

  • Pro Coverage Eligible
    Pro Coverage Eligible Pro Coverage will repair or replace your gear quickly and get you back playing, gigging and recording as fast as possible-even accidental damage from drops or spills is covered.
  • Free Shipping
    Free Shipping This item qualifies for free ground shipping anywhere within the contiguous United States.
  • Easy Returns
    Easy Returns If you're not happy with your purchase, we give you 30 days to return it for a full refund or exchange.

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
  • 19"W x 3.5"H x 8"D (2 space)
  • 16.5 lb.
2 years on electronics and 1 year on speakers.

Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

Pro Coverage includes
  • Accidental damage protection (new gear only)
  • Expedited repair
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended return period
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to three years from date of purchase
  • Repair authorization-toll-free by phone or via the web
  • Customer Reviews

Review Snapshot®

by PowerReviews

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to Top

(0 of 1 customers found this review helpful)


The GK Tank!


from Houston, Tx

Got this one for Valentines Day to replace my old GK Backline and I love it! All the features you need for club gigging, plenty of power to push 2 4x10 cabs and definitely built for the road. GKs are built like tanks. The Boost knob is the best feature. Gives that overdrive growl that really cuts through even at low volume without being overbearing. If you are playing small club type venues, this amp & a good 2x10 or 4x10 cabinet are all you'll need. The only complaint is that the 1/4 outputs should be in the center of the rear panel. Having them low makes it difficult to plug in if you mount this amp low in your rack. I do to use the feet as additional support and had to notch the back of the rack so the cable wasn't in a bind. Other than that. The GK Rocks!

Comment on this review

You are changing the Ship-To country.

Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.