I'm finally putting a system into my Bimmer and wanted some logical sound advice on some of my assumptions/decisions.
One of the main goals for this build is an almost stealth system, hiding away any components with the only thing in clear site being the subwoofers. I also need to make use of the trunk so large enclosures unfortunately are out. I would like a blend of SQ and SPL with a 50% emphasis on each. With that said here are my strict requirements.
Car: BMW E92 Coupe (335i/328i)
Enclosure Alignment: Sealed (Can't do ported )
Enclosure chamber max size: .93 cu feet per with a max of 2 chambers
Amplifier Power: 1200 watts RMS (limited by space requirements)
Subwoofer Driver Budget: $350
I can run dual subwoofers or a single but again limited to 1200 watts RMS. Can only run a 10 or a 12, 15 will not fit unfortunately
I've seen a TON of hype around the Sundown products and had originally planned on running either 2 SA10's or 2 SA12s. I did some modelling in WinISD and it appears in a sealed alignment on 1200 watts they won't meet my SPL requirements. This is most definitely attributed to their extremely inefficient rating of 83.21db. They appear to perform about average in a sealed enclosure but not better then the 12w3's given my power constraints.
In contrast, I also modeled a JL 12w3v3 which subsequently is about 4db more sensitive (87.15db). So doing the math I would need double the power on the Sundowns to get the same amount of output that the JL 12w3's are achieving.
And for kicks I modeled the Sundown SA12 in a ported alignment shown in the graph in green
Sealed Sundown SA12 = Orange
Sealed JL 12w3v3 = Blue
Ported Sundown SA12 (tuned to 35hz) = green
The graph below models each subwoofer in their ideal recommended enclosure, each given 500 watts for sake of consistency.
I am looking forward to hearing peoples recommendations and opinions. I'm not locked down to 12's, 10's would work too. Just please keep in my my goals and recommendations in mind.