The Phonic IW4030 is a high fidelity 4 inch (diameter) in-ceiling loudspeaker with built-in transformer. The IW4030 offers a coaxial driver that encompasses a 4" woofer and 1.5" horn. The 10 Watt maximum input power handling make it ideal for moderate to low ceiling installations such as those found in schools, meeting rooms and retail outlets. The IW4030 exhibits exceptionally wide bandwidth and has a frequency response of 80 Hz to 20 kHz. Perfect for background audio systems, the IW4030 can be integrated into most any ceiling material and is compact enough to fit into tight spaces.