My son has a 15 SGS, the left speaker has quit. Everything is stock. After looking up OEM speaker got to looking in forum looks like can replace both for the price of OEM. Have seen a lot of people suggesting JBL 5?? Something, but searching they are discontinued. What would be a good set with out doing a lot of modifications? Something in the $100 range.

 

Harley boom speakers are 2 ohm so you'd have to replace with 2ohm speakers. And just "upgrading" speakers isnt really an upgrade if you dont add an amp. If all you have to spend is 100 bucks, I suggest trying to find some stock take off speakers here or on other forums and fb groups.