Mesa/Boogie Bass 400+ Rackmount Tube Bass Amplifier (Excellent Condition)
$ 1,499.00
The Undisputed Heavyweight of All-Tube Bass Tone
Capture the legendary "Pitch, Punch, and Power" of the Mesa/Boogie Bass 400+. A staple on major touring stages throughout the 90s and 00s, this all-tube powerhouse delivers massive headroom, articulate string definition, and a harmonic richness that modern Class D amplifiers simply cannot replicate.
This specific unit (Serial Number B3901, estimated 2000-2001 production) features the highly desirable 7-band graphic EQ and is housed in a bare metal rackmount chassis, ready to be dropped securely into your studio outboard gear or touring rack.
Condition & Service History
This amplifier is in pristine, excellent cosmetic and working condition. The chassis is clean, free of the heavy rack rash commonly found on touring gear. It was professionally serviced in 2021, ensuring the internal circuitry, capacitors, and built-in cooling fan are perfectly healthy and gig-ready. The amp is currently loaded with a matched set of Mesa tubes installed in 2011 by Mesa/Boogie. There is one rubber foot missing from the bottom
Key Features:
- Power: 500 Watts (Class A/B) at 2 Ohms
- Tubes: 12x 6L6 Power Tubes, 4x 12AX7 Preamp Tubes
- Tone Shaping: 7-Band Graphic EQ (footswitchable) alongside standard Bass, Middle, and Treble controls with pull-shift parameters
- Inputs: Dual independent inputs for Active and Passive basses
- Cooling: Built-in 3-speed fan (Off/Low/High) for maximum thermal stability
- Format: Bare metal rackmount chassis
- Extras: Includes a fitted padded cover for safe transport and storage
Whether you are a gigging bassist looking for the ultimate live rig or a studio engineer searching for that massive, undeniable analog bass tone, this Bass 400+ is a beautifully maintained piece of Mesa/Boogie history.
General Specifications
- Serial Number: B3901
- Model: Bass 400+
- Condition: Excellent
- Manufactured Date: 2000/2001-ish
- Manufactured Location: United States
- Padded Cover: Included