· There is a newer model available of this item: Eris 5BT· 100W OF CLASS D POWER. 50 watts of Class-D power for each speaker provides all the volume you want without ever sacrificing tonal balance or audio clarity· BIG LOW END, COMPACT SIZE. 5.25-inch woven composite drivers product a more powerful bass response accurately and smoothly.· NATURAL HIGH-FREQUENCY RESPONSE. 1-inch (25 mm) ultra-low mass, silk-dome, high-frequency transducers provide a wide sweet spot for superior stereo imaging· BLUETOOTH TECHNOLOGY. Bluetooth 5.0 wireless stereo connectivity lets you play audio from smart devices and go cord-free.· ALL THE CONNECTIONS YOU NEED. ¼” TRS balanced inputs for professional audio devices, unbalanced RCA inputs for consumer electronics, plus a convenient front-panel ⅛” TRS stereo input.· CUSTOMIZABLE FOR YOUR EARS AND YOUR ROOM. High and Low Acoustic Tuning controls let you fine-tune the Eris E5 BTs precisely to your environment to further ensure the best sound possible.· BUILT-IN HEADPHONE AMP. Listen in private without rewiring your electronics using the easy-access front-panel headphone amp.· MORE BASS WHEN YOU NEED IT. Add a subwoofer quickly and easily with the balance sub output.