I'll throw my 2 cents in...
Originally posted by WHIPPED502
1. Would it help to box them in from behind?
2. Would it be worth upgrading speaker and to what?
I think you'll find that if you upgrade to the Infinity Kappas and ditch the 75 watts of Audiobahn for 100 watts per speaker of a higher quality amp, you'll be impressed.
Those speakers are not made for boxes, so you might be spinning your wheels to box them.
Originally posted by WHIPPED502
I like the subs in that they are marine and had a sturdy plastic grill. I listen to rock and alternative most of the time and I like the bass to fill and not overpower everything. I like a crisp bass not booming. I think I am going with the billet covers and don't neccesarily need the marine subs.
1.What subs and should I add 2 more?
2. Should I box them or keep them free air?
I would box them if you can. In the pedestal, instead of true "free air"...they may be in a very loose, very wrong-sized enclosure.
Two high-quality subs (in boxes) will outperform 4 cheaper subs (in the wrong enclosure). I'd go with a minimum of 300 watts per sub.
Loud, "boomy" or "overpowering" bass come from a loose nut on the controls. If you build a huge bass system...the only way it gets overpowering is by turning it up.
Originally posted by WHIPPED502
I liked the Audiobahn 6 channel amp. It never heated up. I liked that it had dual fans and a meter to tell me how many volts was getting to it. I am thinking of getting another Audiobahn for my subs. I like that they have a remote bass control. The price I can get these amps at seems right. I had this amp for only one season. What is the long term reliability of these amps? Pro's and con's of these amps.
Although I do not have any personal experience with Audiobahn...the couple I've heard were not really hard-hitting. They have a reputation with the "bling bling" "fast and furious" (Riverdave) crowd, but I think that the retail prices may have something to do with it.
I'd ditch it for it a dedicated class D sub amp and a dedicated component amp (or two). This will keep the bass hits from distorting your components.
That's what I'd do...but I'm an idiot, so consider the source.