¡Obtenga asesoría en español!  Llámenos hoy a (800) 222-4701
(800) 222-4700 Talk to an expert!
Press Space or Down Arrow to open the quick shopping cart menu. Press Escape to close the menu and return to the Shopping Cart link.
Loading Cart
Your Cart Is Empty

See what's new at Sweetwater.

My Cart this.cartQty

Gallien-Krueger Fusion 550 - 500/50-watt Bi-Amp Hybrid Bass Head , this item is no longer available, below are some similar products you may be interested in.

Gallien-Krueger Fusion 550 - 500/50-watt Bi-Amp Hybrid Bass Head

550W Hybrid Bass Amplifier Head with 2 Channels, 4-band Active EQ, Contour and Presence Controls, and Effects Loop
Item ID: Fusion550
Sorry, the Gallien-Krueger Fusion 550 - 500/50-watt Bi-Amp Hybrid Bass Head is no longer available. We've left this page up for reference only.
Check out the great alternatives on this page or call toll-free (800) 222-4700 to speak with a Sweetwater Sales Engineer about similar products.
Gallien-Krueger Fusion 550 - 500/50-watt Bi-Amp Hybrid Bass Head
Gallien-Krueger Fusion 550 - 500/50-watt Bi-Amp Hybrid Bass Head
Gallien-Krueger Fusion 550 - 500/50-watt Bi-Amp Hybrid Bass Head

Tube Preamp and Solid-state Power Amp!

This article was Written By

Our Product Research Team

Get to know them!

Get the power you need and the tone you crave with the Gallien-Krueger Fusion 550 bass guitar amplifier head. A 6-stage tube preamp gives you the rich warmth of tubes, and the punchy solid-state power amp delivers the power that GK is known for. Motorized controls change as you toggle between channels via the included footswitch. Professional additions such as an effects loop, DI, tuner out, and speakON connectors make this the perfect amp head for any level of musician. Call Sweetwater and upgrade your rig with the hybrid Gallien-Krueger Fusion 550 bass amp head today!

Gallien-Krueger Fusion 550 Bass Guitar Amplifier Head at a Glance:
  • Big tube tone
  • Sculpt your sound precisely with onboard 4-band active EQ
  • Extremely functional
Big tube tone

Capture the tone you want with the 3-rackspace Gallien-Krueger Fusion 550. The preamp features three 12AX7 tubes for real tube tone. From rock to fusion to slap to reggae, the Fusion 550 has your back. Pumping out 500 watts of low end and 50 watts of high end for your horn, this amp is perfect for any sized venue. An XLR direct out can be used for recording or running to the live mixer.

Sculpt your sound precisely with onboard 4-band active EQ

The Gallien-Krueger Fusion 550 gives you complete control over your sound. Sculpt your tone with the 4-band active EQ, contour, and presence controls, and then add just the right amount of growl with GK's gain control. All the tools you need to dial in your perfect bass sound are onboard the Gallien-Krueger Fusion 550.

Extremely functional

As a gigging musician, you need to be flexible and have gear that is flexible, too. The Gallien-Krueger Fusion 550 is ready for pretty much anything. An effects loop lets you utilize your favorite pedals after the EQ section of the amp. An XLR direct out sends your signal out pre- or post-EQ, and has a ground lift switch.

Gallien-Krueger Fusion 550 Bass Guitar Amplifier Features:
  • Dual-channel hybrid bass guitar amplifier head
  • Sculpt your sound precisely with onboard 4-band active EQ
  • Effects loop for using your favorite pedals
  • XLR direct out lets you go straight into the board
  • Built GK-tough
Shake the house with the Gallien-Krueger Fusion 550 bass amp head!

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.