This is from mesa website. I haven't played it enough to service it and I believe the speakers are EV. It has a retractable handle with wheel for easier transport.
...the newest addition to the Mesa Boogie family, and here to reshape the way Bassists think about Tone. Far beyond power and portability, Buster forges a new realm of definition and clarity, where electric bass steps forward....into the commanding role as timekeeper. Instantaneous attack created in the all-tube pre-amp is fed to an ultra-dynamic, super fast tube driver...then on to the all-new 200 watt (6 x 6L6) powerplant that propels the sound with shocking speed and accuracy. Take the dare, put your favorite solid state bass amp up next to Buster......let the passion of an all-tube sermon on the fundamentals baptize you into a deeper appreciation for what bass tone can be.
200 Watts, All Tube, Class A/B Power / 6x6L6-427, 3x12AX7
Assignable 7 Band Graphic EQ
Parallel FX Loop w/Mix Level Control
600 Ohm XLR Balanced Out
Silent Record Mute Switch
1 Button EQ Footswitch