I have a 2015 Street Glide and I have a JL Audio XD600/6V2 Amp, with a rockford fosgate signal processor, both mounted under the fairing, with Polk audio 6x9's in the bag lids and arch audio moto, 6.5 speakers in the fairing. After I changed out my handlebars, I put diamond audio tweeters where my factory mirrors were. I also have 8 inch Hertz mid bass in each bag. You can go as mild or as wild as your wallet will allow. LOL