The SVT-410HLF delivers devastating low-end bass, all the way down to 28Hz, thanks to four 10" speakers working together to move a tremendous amount of air. The SVT-410HLF actually moves 10% more air than two 18-inch speakers, and 25% more than three 15-inch speakers! The SVT-410HLF also delivers superb top-end, thanks to its 1" horn driver, strategically crossed over at 4kHz. 500W RMS at 4 ohms. Features a tilt-back handle and 3" dolly-style castors.