I have 4 pro studio home or concert speakers each speaker box has 2 15" subs a mid and high range the box measures 4' tall 2' deep and 2' wide all work perfectly and sound amazing so total subs are 8 15s with a 4 channel insignia receiver that power them well they can handle a lot more however they are plenty loud clear and a nice set to add to your home the retail price for theses is $1500 a set so $3000 for what I have.