bmwking

the ones with the sounds that come out tend to be the best

i think this kid needs to read up on Occam's razor

so before you go mickey mousing stuff together, why not just get a plate amp? it's $50 cheaper than what you have listed and it's designed to work off 120v home voltage. it's in your power range too. https://www.parts-express.com/b-52-actpro-18s-subwoofer-plate-amp-700w--299-2371

for sure, i understand where you're coming from. worth an hour of your time to install them, check that the seatbelts are still in a good spot with the new raised lower section and see how you feel about it. i dont think much would change in terms of crash results, and being a machinist, im sure you could work up something really secure to make sure the seat was just as secure as the factory mount.

that's bs. 8s can get low, nasty, and windy in the right enclosure. they typically require less airspace too. OP are you not keen on raising the seat because of cost of the pre made brackets? if so, see how the pre mades actually do the seat lift. chances are you could get 2 pieces of 3" box steel and raise the lower part of the seat yourself. fwiw 4 8s in the right ported box would be musical and loud on good power.

have your cash ready

what're the dimensions of the box you have designed? with and without port

what are you trying to tune to?

http://lmgtfy.com/?q=free+beat+creator+software

both of you guys should find a download of Torres and input your numbers. they are definitely not lining up with the trash ass RE calc.

Sundown NS-2

sony xplod, lightning audio, boss, pyle, pyramid, etc. tons of amps out there for you.

https://www.amazon.com/Rockville-dB45-Channel-Amplifier-Stereo/dp/B0728K1GD4

sucks to see an old amp go, however I was able to find this as a replacement for you: https://www.ebay.com/itm/FOCAL-SOLID2-BLACK-AMP-2-CHANNEL-400W-MAX-SPEAKERS-COMPONENT-SUBWOOFER-AMPLIFIER-/121057561537

ohhh ok whew, just making sure. i was like, well i think we found the issue lol