Quoted from Deez:I use the Polk PSW10. You can get them for 80 bucks shipped to your door from amazon prime from time to time. I've seem them as low as 70 shipped. They also already have 2 channels on them so two subs is enough for 4 pins. I guess HS will just have to be subless. Don't get me wrong, I think your product looks awesome and will definitely fit the needs of a lot of people. I'm personally just a cheap ass!!
Thank u. And no worries...