Markbass Standard 151HR, Bass Box, Rated power: 400 W @ 8 Ω, Equipped with: 1x 15"" neodymium custom woofer (made by B&C) + lateral adjustable 1"" compression driver tweeter, Speaker twist and jack, Quality 18 mm plywood, Stackable plastic corners, Solid metal grid, Tuned bass reflex port on the back, Durable felt cover, Frequency range: 40 Hz - 20 kHz, Efficiency: 100 dB, Weight: approx. 24 kg, Dimensions (W x H x D): 59.5 x 60.5 x 48 cm