That's kind of it . I'm not saying anything bad about the J&M speakers, but you're buying speakers from a "motorcycle" accessory company, not an audio electronics company. Jus' food for thought. I did make three vents in the bag for the sub. Those were done with drilling small holes in a circular pattern and using a product called Frogzkins to cover those vents. The vents are discrete ,but I have some tremendous bass capability added to the music. I use a 4 channel micro amp to power everything. The amp is from a company called NVX. I will post a link to the write up later when I'm at my PC. I'm very happy. It isn't for everyone, but I love it.