Help, its just toooooooo bassy

[skynyrd]

I would take and cut 2 3 inch holes on the back panel, 1 behind the upper corner speaker and 1 behind the lower corner speaker, I built my own 4x12 cab and it was pretty bassy and with the back off it cleaned it up quite a bit, so the 2 opposing holes helped out nicely.

[mike_bax]

Well, I'd like to thank you all, I've done some of the tips offered to me, and my cab now sounds like, well, a cab

Thank Y'all, this is a damn fine forum

[J M Fahey]

Hi.
If you wired all speakers in parallel as in the schematic above and checked that all move "forward" at the same time when you apply the positive of a 9V battery to the plug tip, and the negative to the body, then your cabinet is fine.
The sound you get is the normal sound 4 paralleled 16 ohm, G12T75 give.
If it's muddy, search somewhere else, either head, guitar, pedals, old strings, whatever, or guitar wiring, because your cabinet is not at fault.
An out of phase speaker would give less bass, which is not the case.
There is no wiring that kills highs.
An open or semi-open back can dampen the mid-bass bump that often appears in small, undamped closed cabinets.

[Emetal]

It's the type of the wood and the thickness of it, that gives the resonance and the sound coloration. Big companies have experience with getting it where they want it. Sound-wise speaking..

[pdf64]

Panel dimensions play quite a role also!
But with sealed cabs (like a regular 4x12) the internal volume is arguably the most significant factor.