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Adviced needed: Acoustic 403 cab modified TT

Hi folks!
I recently scored an acoustic 330 head in pretty good shape with a 403 cab.
The thing is that cab originally sports 4x12 inchers but mine only has a single 15 (300w, 8 Ohm, local brand, no TS parameters or usable info whatsoever). Super loud, no farts at all, but kind of in the boomy side. And no grill cloth nor tolex but ugly carpet:
th_IMG_0003.jpg


Options:
1) Use that 15 for something else and get an Eminence 3015LF and Alpha8a and put a cousin of a Fearfull15 inside, recessing the baffle as needed to make the inner volume as close to the original fearfull as possible. Lots of math to do though. (Is only a matter of inner volume? Can I change the relation of height and width an deep as long as I keep the volume the same? The 403 cab volume is larger than the f15's)
Retolex and get a grill cloth. Super nice!

2) Get 4 less-than-optimal 15'ers (thinking of local DIYman, Emis are too expensive here!) and DIY a 408 cab. (Getting an original acoustic cab here in Argentina is next to impossible, don't even suggest that :bawl:)
The Mother-Rig. Never listened to one so don't know what to expect, but the sense of completion with the head on top would be awesome. Besides I'd still have the other cab for modularity.
Pros: the 2 Ohm load the head supports.
Cons: it would be a pursue of the acoustic sound, not a flat cab at all

3) Similarly: get 4 12'ers in the 403 box. I don't think I'll like this one.

The cost of first 2 alternatives would be nearly the same. (And I guess I'll probably build both, given time and money LOL)

I play mostly rock, a FNM tribute as of now, starting to really dig the vintage sound of the head but reading the fearfull thread is having me asking if I'd like that either. The head has a heck of EQ to find for other sounds also, point for the f15.

Of course size matters, but this is the thing I like to do, put her wheels and push it :bassist:

Thanks for reading. Let me know what you think
see ya!
 
I'm no sound engineer, but does the cabinet volume match a single 15? I'd think that Acoustic optimized the cab for 4 12s, so why not go that route? Four 12s gives you more radiating area than a single 15 and should still pump bottom. I'm using two Genz Benz 112 T cabs now and like it quite a lot. I spent most of the '70s using an Acoustic 440(?) head and 403 2x15 cab.
 
Just took a look at my 1980 Acoustic catalog and it shows the 403 cabinet as a 4x12" guitar cab. Obviously, someone has done some major reworking of the cabinet to re & re the baffle board to convert it to a single 15" for bass. Perhaps converting it back to 4x12 (for bass) might provide you with the tone you're looking for. For the cost and effort required to do that, consider leaving it as is and replacing it with something else if you're able to live with the tone you're getting. If nothing else, roll off some of the bass on the 330 to reduce the boom.

Eitherway good luck with it.

TD
 
I'm no sound engineer, but does the cabinet volume match a single 15?(...)

Me neither. Probably not. I was thinking I could recess the baffle a couple of inches so effectively tuning the cab towards a volume closer to the one find inside the fearfull15. That option would be viable only if I can get my hands around a 3015lf for it.

Trying to get 4 12''ers in there is not really my favorite: Cant afford 4 good drivers and with 4 cheap ones the tone and SPL resulting would not be really better. I'll just leave it as it is now.
(So much for keeping the cab original... I still have the head though)

The other route thats going strong is leaving the cab as it is (rolling off some bass works really good for small to medium sized venues, surpisingly crispy and clear, not huge SPL though) and DIY'ing a 408. In the acoustic@homeunix site we are putting up the schematics for it thanks to the great folks over there measuring theirs. And you know, the mother rig ain't it? :D

Either way: this project spans along many months since the cost is close to a full month salary :atoz:

Feel free to give me your thoughts
see ya!