The Kickback KB15 features a 500-watt, high-efficiency Class D amplifier and a 15-inch Hydrive Series speaker with a neodymium magnet. Hartke Hydrive's unique hybrid cone speaker is constructed with an outer paper cone that produces deep and warm low frequencies, and an inner aluminum cone that produces mids that are cutting yet sweet. The specially designed cabinet can be used flat on the floor or in a "kickback" position for increased high-end clarity and directionality. The amplifier design, along with neodymium speaker magnets, combine tremendous power with a lightweight design.