Bazooka BTA8250D BT Series 8-Inch 250-Watt Class D Amplified Tube Amplifier Wiring Kit For Btaxx250D Amplifier Wiring Kit For Btaxx250D Amplifier Wiring Kit For Btaxx250D Eight-inch bass tube with on-board 250-Watt, 2-channel amplifier Eight-inch, high-efficiency subwoofer Class D amplifier technology (200W RMS @ 4 Ohm / 275W RMS @2 Ohm) Optional speaker output for a BT6014 bass tube Corner-loading optimization provides maximum bass performance