Oldschool PowerDVC RFR2215 Recommended Enclosure Size ?

[Steve Young]

I have two Rockford Fosgate RFR2215 PowerDVC subs and the manual states the recommended enclosure size for ported and sealed is 2.5 cubic feet.... The range in the manual for sealed is 2 - 3.5 and the range for ported is 2.25 - 3, however the optimal size for either is pointed out in the manual as 2.5 cubic feet.

Does anyone feel with updated computer modeling technology that those recommendations are now outdated and a more efficient, better sounding enclosure can be achieved for these subs? I have attached the specs and T/S parameters, as well as a screenshot of the enclosure section of the manual.

I really love the subs, as I am a fan of oldschool rockford equiment. I currently have a PA-1 preamp/eq feeding a punch 360a2 , 500a2 and 800a2 with the 800a2 running the 15's in a sealed enclosure at 2.5 cf per chamber. This sounded good in the trunk of my 5 series, however I am now driving an xj cherokee and I am leaning towards a vented enclosure, as it might sound better in an SUV setting....

If you think I should build the vented box to the specs in the manual, I understand, but I wanted to double check in case things have changed.

Thank you everyone for your time and opinion,

Steve

[rockFord_Expedition]

Back in the day RF made some bad ass gear but had a lot of errors in their manuals. I don't know if that is the case here but also remember that when those subs were made things were different than the equipment of today.

[CleanSierra]

I had two of those very subs a few years back. I ran a single 15" in 2.5 vented cubes and it was sufficient. I had it on about 500-600W only and it got down really well. I never ended up running both subs, I sold them to forum members here