Gallien Krueger MB 800 Fusion Bass Amplifier - Used

The Gallien Krueger MB 800 Fusion is a lightweight yet powerful bass head that combines GK’s renowned solid-state punch with the warmth of a 3-tube preamp. Delivering 800 watts of output in a compact chassis, it offers exceptional clarity, headroom, and portability—making it ideal for gigging bassists who need professional tone without the heavy lifting.

This unit is Used and in solid working condition.

⚠️ Please note: as this is a used amplifier, we’re unable to offer warranty or shipping. We appreciate your understanding and welcome you to test it in-store with confidence.

Takeaway

Big, tube-infused GK tone in a compact, ultra-portable package. A serious bass head for stage or studio use, offered here at great value in used condition.

Highlights

• Hybrid Design – Tube preamp section paired with Class D power for warmth and punch.

• Massive Output – 800 watts of power in a lightweight chassis.

• Compact & Portable – Easy to transport, perfect for gigging musicians.

• Flexible Tone Control – Signature GK EQ shaping for clarity and presence.

• Used Condition – Fully functional, player-tested.

Specifications

• Power Output: 800 watts

• Preamp: 3 × 12AX7 tubes

• Power Section: Class D

• Controls: Gain, EQ (4-band), Master, plus voicing filters

• Connectivity: Speaker outs, DI out, auxiliary and headphone jacks

• Condition: Used – fully working, cosmetic wear may be present