box behind the seat for a sub. has anyone tried?

RonRizz

we do know that sub-bass frequencies are non-directional, right? if you can tell where the sub is in your car, you have tuning issues. crossover too high, out of phase, ect.
one sub or two, any spot in the car, makes no difference.

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SouthArk370Z

For the most part that is true, especially in a car (the worst possible audio environment imaginable), but multiple low end drivers can set up standing waves if one is not careful. Probably not a big concern for most ppl, but it's why I recommend only one sub-woofer.
But, as with everything else about audio, it's what sounds good to you.


To the forum in general, it's usually very easy to phase bass drivers. Just do an A-B comparison by swapping the wires to one of the drivers. When out of phase, there will be a very noticeable "muddy", muted sound. This works best if you can set the drivers side-by-side and stand directly in front of (or behind if there are no enclosures) them.

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RonRizz

more precisely, cancellation issues, not standing waves. highly unlikely to create standing waves at sub frequencies. the wavelengths ar far too long.
1126 fps speed of sound 60hz tone= 18.76 ft wave.
higher freq. is where you may run into issues with standing waves as well as Inside your sub box. for a standing wave you need to have 2 paralell surfaces reflecting that wave at each other.

__________________
P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals