The Imperio Dual 4.75" Woofers Active Line Array from Avante Audio is a 240W RMS Class D amplifier with two 4.75" Neodymium woofers and six 1.75" IDVAT HF drivers. It is designed to be used with the Imperio subwoofer and Imperio pole (available separately). This amplifier has a switching power design, an LED power/signal/clip indicator, and 24-bit DSP selectable configurations. It features a 3-pin XLR powerCON input and output. The two 4.75" Neodymium woofers have a 1" voice coil. They have a frequency response of 150 Hz to 20 kHz and an impedance of 4 Ohms.