I just got these, and found out I really need one of these. I had many single 12 in the past, and markbass 121H is the most impressive cabinet I ever played thru. It's clean, focused, and deep cabinet. Here is some info on markbass website. If you have Markbass Mini CMD 121P, this cab will add more punch and low-end to your combo. It's amazing cab!!! Stacked or solo, this award-winning cab is especially effective for acoustic bass players. The Markbass Traveler 121H is a fantastic speaker cab for bass players who need a small, yet warm-sounding rig. The fact that the Traveler 121H won the 2007 Best Bass Cabinet MIPA award should make it an even easier choice, especially for acoustic bass players. Made of sturdy, yet lightweight construction, the rear-ported Markbass Traveler 121H features a 12" neodymium woofer from B&C and a 1" compression driver with custom horn. Markbass Traveler 121H Rear-Ported Compact 1x12 Bass Speaker Cabinet Specifications: * Impedance: 8 ohms * Speaker size: 1 x 12" * Bass ports: rear * Tweeter: 1" compression driver with custom horn * Power Handling: 400W RMS (AES Standard) * Crossover Frequency: 3.5kHz * Frequency Response: 40Hz to 20kHz * Sensitivity: 99 dB SPL * Weight: 34.61 lbs. * Dimensions: 23.39"W x 15.35"H x 17.05"D Markbass Traveler 121H Rear-Ported Compact 1x12 Bass Speaker Cabinet Features: * B&C 12" woofer * Great power-to-weight ratio * Made of high-grade, multi-ply poplar * Glued, screwed, and sealed internally with special compounds for maximum sound quality * Protected corners * Grill for protecting speakers * Lightweight * Redesigned to stack with Standard Series cabs * On it's side it also stacks with the Mini CMD 121P and CMD 121H combos This sale also includes Studio Slips Clamshell covers ($130 value). I will sell it for $450 shipped in US 48, Paypal welcome!!!