MuhammadAliHi, this is Ali. I have been an enthusiast of speakers especially subwoofers. So, I am finally going to throw my experience out for you guys. subwoofermag.com/
In this category, you will find all the information about subwoofers. Either it could be general information about subwoofers or connectivity, all under one umbrella.
A subwoofer is actually a speaker or loudspeaker, used to produce low-pitched frequencies; these frequencies may vary from 20 Hz to 200 Hz in particular. Those low-pitched frequencies are often called bass. A subwoofer helps loudspeakers to enhance their low-frequency ranges to produce quality sound.