The DAYTON AUDIO DAEX32Q-4 40W 4-OHM AUDIO EXCITERS SURFACE TRANSDUCERS - PAIR is a set of audio exciters designed for home speakers and subwoofers. These round-shaped transducers from Dayton Audio offer a 2.0 channel system configuration with a power output of 40W RMS. With wired connectivity and an impedance of 4 ohms, these audio exciters are perfect for enhancing the audio quality of your home audio setup.