RAM_Designs
5,000+ posts
SketchUp Master
The motor cooling is different. Both subs can handle a good amount of power, especially just for burps. A buddy of mine burped his HDC15 with 6kw on a regular basis, and never had any issues with the sub.maybe so dave but the ones i checked out at finals were pretty much the same....some people were running the q's with the aluminum coils but that about it...