The Carvin B1500 is an absolute monster of an amp. Super clean, massive headroom amplifier - if you need clean power nothing comes close to one of these (and they're no longer being made!). The drive knob can be nice to add some harmonic coloration to the sound, although it won't get the same type of solid state grit that say a GK does. 6 EQ knobs provide more options than most people probably need. And, as the spec sheet says, this is one of the few amps that you can run at 2Ω (at almost 2000w mind you) without any issues. This was my tour amp for years and I never had a single issue with it (alright, that's not entirely true. Did some musical theater gigs in a place that didn't have the best wiring and whenever I would play below a low E the lighting in the theater would dip... not my fault, the amp needed the juice!)

Scuff marks on the top of the amp from being in a rack for years and having a rack tuner rub against it in transit.

Disclaimer, this is just the amplifier. I no longer have the power cord (although they are easy and cheap enough to purchase) so there will not be one included. 

CARVIN ENGINEERING DATA The B1500 mono block bass head offers classic natural bass tone with the highest power headroom available in any bass amp to date. The B1500 delivers 700w at 8Ω, 1250w at 4Ω and 1900w at 2Ω. Four discrete Class A input stages produce the harmonic basis for the preamp right from the input jack. It begins with a boutique flat response, then we add 6 tone controls for you to carve out your signature sound. Harmonic content increases as you turn up the Drive control producing a growl at maximum settings. Solid design, bullet-proof construction and a list of indispensable features assure the B500 or B1500 will be the heart of your rig for years to come. • Discrete Class A input stages • Active/Passive input gain switch with input CLIP indicator • Preamp DRIVE and master VOLUME controls • Six EQ controls: SUB BASS, BASS, LOW MID, MID, HIGH MID, and TREBLE • Signal MUTE front panel switch (also controlled by optional FS22 footswitch) • EFFECT LOOP front panel bypass switch (also controlled by optional FS22 footswitch) • DIRECT OUT balanced XLR with independent LEVEL control, switchable "Pre-Post" and "Ground Lift", DC isolated • TUNER output jack independent of MUTE switch • Internal OPTO (optical isolation) clip-activated power amp limiter with "limiter free" normal operation • High current SPEAKON® • Metal shaft controls with threaded metal bushings mounted directly to front panel • 19" 3U all steel chassis