amp can not be any longer then 13"this is a high quality amp that has a small footprint...
http://www.caraudio.com/forums/car-audio-classifieds/501099-f-s-planet-audio-big-bang-175-4b.html
It depends on how you turn it since Width and height are of no concern...turned one way its only about 7" longamp can not be any longer then 13"