Warm, clean G-K sound at a working musician's price.

With the Gallien-Krueger 400RB-IV Bass Amp Head the popular 400RB has been increased in power to an efficient 280W. Comes fully loaded with such pro features as a toroidal transformer, 4-band active EQ, sophisticated SOA protection circuits, and a variable-speed fan. At its moderate price, it puts that warm G-K sound within easy reach.

Gallien-Krueger products have 1-year speaker warranties and 2-year electronic warranties.

Gallien-Krueger 400RB-IV Bass Amp Head Features:

• 280W @ 4 ohms
• Continually variable-speed fan
• 10dB input pad
• Mute switch with LED
• 5/4 string voicing
• Adjustable contour
• Presence voicing
• Bass specific 4-band active EQ
• Boost and master volume at output
• Direct out: XLR, ground lift, and pre/post switches
• Patching: send, return, and tuner out
• 2 - 1/4" speaker jacks
• 15 lbs.
• 17-1/2"W x 3-1/2"H x 8"D

Order today and play G-K!

Gallien-Krueger 400RB-IV Bass Amp Head

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Average of 16 User Ratings

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Customer Reviews

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Best solid state head

Posted by Super70`s4ever from Miami,Fl on Jan 27, 2010

Experience w/product: I own it

Reviewer's Background: Hobbyist-part time gigs

Reviewer's Play Style: Good music

Bought it new,start using it with a 15" speaker cabinet @ 8 ohms:powerful sound.Then ,for better definition ,latelly I have been using a 4 X 10" speaker cabinet,WOW!This is it.It is my best sounding rig now.The boost & Master controls work together to give you that special sound I was missing from other solid state heads.Also the contour and presence give you many different options.For indoor gigs this is all I need.This head is still MADE IN USA.

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Ideal 5 string Bass Amp

Posted by Boogiewolf69 from Western North Dakota on Mar 14, 2009

Experience w/product: I own it

Reviewer's Background: Active Musician

Reviewer's Play Style: Rock, Blues, Country & Country Rock

I love this amp, as the other reviws you can really dial in the sound you want. I have been using it for about 3 years as a bar cover band and it takes the abuse. Not mentioned by the others is the buttom you use that accents the low B-string I've had several other amps and the low B-string required extra force to get it to sound without an EQ. This amp takes care of it. Also has a XLR direct out so if you don't want to mess with mics you don't have to, advanage is you can adjust your volume with out affecting the mix. I will buy another for backup.

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This is definitely a must buy

Posted by JazzAlchemistJeff from Hawaii on Jul 13, 2008

Experience w/product: I own it

Reviewer's Background: Active Musician

Reviewer's Play Style: Think The fall of troy, and protest the hero.

This head is absolutely amazing. It's light, solid, and packs an AMAZINGLY customizable sound, like think of a sound you want. Mess with the dials, and you can get it, seriously. I messed with it, oh, an hour total (for sound) and got the perfect tone I was looking for. Listening to Tfot, I thought they had a pretty sweet bass tone. Got the tone using fingers, while he uses a pick (seriously) the amount of control you have over your tone is incredible. You Will not regret it, from what i've heard the more expensive models don't so much have sound differences, but power differences. But this thing packs a wild punch i've found, more than all 300W amps i've encountered. Very powerful.

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This Is a Great Bass Amp

Posted by Dyno from Milwaukee, WI on May 8, 2008

Experience w/product: I own it

Reviewer's Background: Active Musician

Reviewer's Play Style: Classic Rock

I have owned my 400RB for over 20 years, and have used it both as my primary bass amp and to back up my custom rack-mount set up, Ampeg, and a GK 800 RB. It has great flexibility in the sounds you can get, tremendous power for a unit so small and is rock-solid dependable. I am currently using it to push a GK Goldline 2x10 and an Ampeg B115E and it sounds great! It makes a great "small" stack for club work and also works fine for outside gigs when other sound reinforcement equipment is available. Great little amp for the money!

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working mans amp

Posted by WorldsGreatest from Florida on Mar 9, 2008

Experience w/product: I own it

Reviewer's Background: Touring

Reviewer's Play Style: Country

I've had mine for 8 years. It finally went on me in a show last night. Not bad for the millage I've put on it. I play 2-5 shows a week, every week. Plan to buy another. I will be a GK user for life. I love it when the sound guys say, "Oh, cool, you don't need a DI box. Great sounding amp man."

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Gallien-Krueger 400RB-IV Bass Amp Head

Read 16 Reviews

Gallien-Krueger 400RB-IV Bass Amp Head

Read 17 Reviews