The Markbass Standard 151HR is a bass speaker cab that will never leave you lacking in the the bottom end department. The Standard 151HR bass cabinet's 15 in. custom speaker gives you a deep, classic sound that suits many musical styles. This cab can be used on its own, but combining it with a Markbass Traveler 102P or Standard 104HR makes for one powerful stack. So plug the Markbass Standard 151HR bass cab in and prepare to rock. Features Ultra-light neodymium custom speaker Rear-Ported 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 Grille for protecting speakers Lightweight Specifications Impedance: 8 ohm Speaker size: 1 x 15 in. Bass ports: rear Tweeter: 1 in. compression driver with custom horn Power Handling: 400W RMS (AES Standard) Crossover Frequency: 3.5 kHz Frequency Response: 40 Hz to 20 kHz Sensitivity: 100 dB SPL Weight: 52.9 lb. Dimensions (WxHxD): 23.4 x 23.8 x 18.9 in.