Question

What is the main difference when you pair StudioLive 18sAI with StudioLive 328AI compared to StudioLive 312AI and 315AI?

Answer 1

It would really boil down to the amount of bass frequencies that you'd be able to push through the tops versus the sub. The 328AI has a slightly higher Peak SPL as well, but I don't think you'd really have any loss in quality of sound regardless of which top you choose between those three. You can find the frequency response for all of our speakers on their product pages under the "Tech Specs" category.