Amazon.com: Kanto YU4 Powered Speakers with Bluetooth and …

The subwoofer is set to about 90Hz and 180 degrees. The only feature I hope it has is an indication on the volume setting somewhere or somehow. Switching from the computer optical link to my dac line out to aux produced a rude surprise to everyone in my house. … 2.0 Wireless Studio Monitor Speaker – 42W RMS with Subwoofer Line Out – Black. 4 …

https://www.amazon.com/Kanto-Powered-Speakers-Bluetooth-Preamp/dp/B01N1ZTJJK