I need advice on where to face my subs. my current box only fits one way. facing back, it is in a 1996 geo metro and was wondering us anyone had experience with subs back in the hatch. Thank you very much

Depends on the response you want.

For sealed applications, I think you might want it facing forward for the tighter, more controlled response.

But for "Loud" or SPL numbers, I've always seen them firing back in a hatch. Just makes more sense to utilize all the space back there and bounce it to the front ...

I'm no expert though, wait for some more replies lol

A really good question I wish I could have answered ...

Is there any thing someone can do to determine what's best for their vehicle w/o actually building 2 sets of boxes?

A meter ... A careful ear ... I dunno.

I'm still debating where I'm going with my own build, so I know the conflict your facing.