Packaging: Pair 2-way bass-refiex powered speaker with 4.5" cone woofer and 1" dome tweeter 60 Hz - 22 kHz frequency response (-10 dB) 26 W + 26 W output power Room control and high trim response controls HS Series speakers have become the standard in studio monitors, trusted for many years by the world’s top audio engineers, producers, and artists. Now Yamaha has redefined their essence in a compact housing. The HS4's are powerful tools to help create a wide range of audio content—from music production to video editing—that meets the expectations of creators who have limited space and need to keep the volume down but do not want to compromise on monitoring quality.