I purchased the Markbass Traveler 151P several years ago to pair with my Markbass 102-P combo amp when I was playing in medium to larger clubs. Besides the incredible punch it added to my rig, I was attracted to it's weight, at about half of other pro extension cabinets. (Save the back!) I only ended up using it for eight or ten gigs, so it is in very good condition. If new, $700+.
Specs:
Weight: 40.79 lb. Width: 18.27” Height: 18.23” Depth: 18”.9”
Impedance: 8 ohms Speaker: 1×15 in Tweeter: Laterally adjusted piezo Bass Port: Rear Power Handling: 400W RMS AES Standard Crossover Frequency: 3.5 kHz Frequency Response : 40 Hz to 18kHZ Sensitivity: 100db SPL