Port Location

Sometimes it matters, sometimes it doesn't.  It's all about cancellations due to swound wave reflections in the vehicle (which you cannot avoid but do not want.)  Since the port is the only thing making sound at the tuning frequency, if it is oriented in a different direction than are the woofers, it will be subject to a different set of acoustic interactions.  I have seen instances where the SPL actually goes down at the tuning frequency only because of port location.  Also, you may get less bass over the entire subwoofer spectrum as the small amount of sound that escapes through the port at non-tuning frequencies may cancel part of the wave from the woofer since it will be out of phase.  The best location for SPL ports is always on the same baffle as the drivers.  But hey, give it a try and see what happens.  Be prepared to move the enclosure around quite a bit to find the "sweet spot" as it will be far more difficult to find when you're dealing with two out of phase sound waves instead of one wave.  Do you have an SPL meter?  You'll need one.Support the12volt.com