Near Future Set-up. Which route to go?

[vnisme]

I am stuck on which route I should go. I'm currently running 2 Sundown SA-8's and I don't know if i should get 2 more or look somewhere else. Right now I am running them on an Audiopipe APCL-1500 and in the future I was going to run 2 of the same amp. I also have a JBL GTI W15 I was thinking I could build a box for and run that on both those amps. Or buy 2 hds 312's and build a box for that... Id rather just do one of these options and not do all 3... Trying to be as loud as possible musically and move tons of air.

1. Buy 2 more SA-8's and build a box for 4 SA-8s on 2 APCL-1500

2. Build a box for my JBL GTI W15 and run that on 2 APCL-1500,

3. Buy 2 Soundqubed HDS312's and build a box for it and run that on 2 APCL-1500.

Which route to take? If the 2nd route, I was looking at the EMF Banhammer 15 if the JBL doesn't give me the desired output.

[Guest]

1. Buy 2 more SA-8's and build a box for 4 SA-8s on 2 APCL-1500

[ckeeler11]

3. Buy 2 Soundqubed HDS312's and build a box for it and run that on 2 APCL-1500.

[hispls]

WGTI is more of a SQ oriented sub. That said I'd avoid Soundqubed if you can't get into HDC or higher line.

Of course the EMF sub is a ton more money than any of your other options and all things equal a huge neo motor will probably be loudest if you aim to compete, but may not be a good choice to tune low and wind up with a good wide bandwidth. Not sure how they are going to model, but all the big motor force drivers I've used in the past have a somewhat high Fs and very low Q which may make designing a box for your goals complicated.

How much space do you have for a box?

[vnisme]

I probably only have about 5 net max. 7 gross. I know the WGTI is more of a SQ sub, but the funny thing is that I found a competition design for it from JBL. The tuning for that design is 55-70 hz and I don't plan on competing, I would like this to be the loudest it can musically. I'm willing to give up some low end response to make it more peaky. I was thinking around a 35 hz tuning. Why do you say not get anything below the HDC line?

These are all going to be sub and port forward, trunk wall.

[DLHgn]

If you want to move the most air, have the most cone area you can while still building a box that is the proper size for the sub/subs you have. That's a simplistic look and not always 100% true but usually a good start. The key is to making sure your box can properly fit the sub you want. 2 12s will be more cone area than a 15 and I believe the most out of all 3 of your options so it will likely have the most output. As for the sound quality I think I read somewhere on here that generally speaking 2 12s will sound better than a single 15 but I could be talking out my ass so please don't take my word for it.

[vnisme]

5 cu ft should be good enough for 2 12's or 1 15 right? Still tough to decide.... the 15 I can start building right now and always swap out in the future.. the 2 12's I would have to hold off until I get them. Damn....

[DLHgn]

5 ft^3 should be good for 2 12s bit no way to really tell until you model it. Some subs prefer larger enclosures while others prefer smaller. As for 5 ft^3 for a 15 that seems a bit big but I could be wrong.

[ShadeTreeMechanic]

5 cubes net would be good for two HDS315s which would be louder than the other choices.

Edit: Each HDS315 needs about 4 cubes. Never mind.

[Karkov]

2 more 12" SA