Hello, I am new to this site and this is my 2nd (and hopefully last) question: I understand that subs have no mids or highs, and sound ‘muddy’ if used as is. My question is what determines the ‘just low end sound’? Can I change out the speaker, or by-pass electronics (or both) to utilize the power amp, and turn it into a bass cab? It is a JBL JRX 118sp model. I got it off a friend real cheap and was hoping to convert it. Any input would be appreciated. Thanks!!!