firstly product was packed securely and had no damage the width is around 17-18 cm we can easily hole and install this on sub box or car body product is working perfectly and i suggest not to play very high bass for long time like 1/2hr give it a break or else it burns out. or if u make a casing and install a fan then i think no prob. i am happy about this product and i am driving this amp to a sony 1350w sub and i am totaly satisfied with the bass quality and LPF is best