CERWIN VEGA B4 Stealth Bomber 2 Ohms /80 Watts x 4 at 4 Ohms RMS 4-Channel Auto Amplifier The new STEALTH BOMBER 4 Channel amplifiers from Cerwin-Vega Mobile create endless installation options. * Class D IR Chipset with DirectFET Power Mosfet Output Stage * Switchable 12dB Crossovers and Vega Bass Boost 18dB @ 45hz