All subwoofers feature interwoven tinsel leads for increased durability, large slotted vents and fin shaped heatsinks for a quicker cool down and spring loaded push terminals for the ultimate connection and power transfer. Depends on the series you choose R, F, ML, C or A the sub will either has a polypropylene, paper, aluminum or carbon fiber cone. Whatever your preferences are, all our subs deliver a great performance with a clean and smooth bass response in virtually any style sub box.