Bret Posted October 7, 2018 Report Share Posted October 7, 2018 Model: RFP 1415 I have 2 of them. The manual gives enclosure specs for sealed only. I want ported tuned to 30hz. I just need help figuring out the CF. I have used various calculators and keep coming up with nearly 10cf per sub so I must be doing something wrong. Would appreciate some help. Thank you. https://www.rockfordfosgate.com/rftech/library/1996/5_subwoofers/rfp-1415_1815-ts.pdf Link to comment Share on other sites More sharing options...
Joe X Posted October 8, 2018 Report Share Posted October 8, 2018 Specs based on two 1415 drivers tuned to 30Hz and 400 W RMS total power. 8 net total with 36 square inches of total port area. or 10 net total with 40 square inches of total port area. Link to comment Share on other sites More sharing options...
Bret Posted October 8, 2018 Author Report Share Posted October 8, 2018 Thanks Joe X! I was worried I was going to have to make a 20cf enclosure. 8 or 10 I can manage. Link to comment Share on other sites More sharing options...
Bret Posted November 21, 2018 Author Report Share Posted November 21, 2018 I built the box for these finally. It turned out 8.7 cf. Revisiting this thread to see what port recommendations I got from Joe x and I realized I don't really understand port area. I know what port volume to use according to torres calculator I downloaded. Torres shows my port area to be about 27ci using a 5.9" diameter id tube. Is port area just another way of expressing tube diameter? Is 5.9" a good diameter in my case? Thanks for any help. Link to comment Share on other sites More sharing options...
Joe X Posted November 22, 2018 Report Share Posted November 22, 2018 In your case a couple of 5" ports would give you a little above the 36 square inches of port area, unfortunately 5" pipe is not so easy to find. Link to comment Share on other sites More sharing options...
Bret Posted November 22, 2018 Author Report Share Posted November 22, 2018 Thanks Joe. I'm going to do a slot port instead. Link to comment Share on other sites More sharing options...
Bret Posted November 26, 2018 Author Report Share Posted November 26, 2018 Here she is. When I put the speakers in I noticed the surrounds were coming apart in several places. I just reconed these with oem parts. Guess I should have used some other surrounds. Link to comment Share on other sites More sharing options...
ckeeler11 Posted November 26, 2018 Report Share Posted November 26, 2018 So what did you end up with on the port? Link to comment Share on other sites More sharing options...
Bret Posted November 26, 2018 Author Report Share Posted November 26, 2018 3" w x 12.75" h x 8" l Hopefully tuned to 30hz. Ill see once I get some new surrounds and can play them. Link to comment Share on other sites More sharing options...
Bret Posted December 5, 2018 Author Report Share Posted December 5, 2018 Got the the surrounds last week and glued them on. Wired this up and am breaking it in. I'm really happy with the sound of it. I haven't cranked it up yet but at low volume it hits the lows like I was hoping. The tuning turned out to be what I was shooting for at 30hz. It will play below 25hz so I think I need to crank the subsonic filter up a bit. I tried painting it a few times and ended up covering it with foam core wrapped in vinyl. It worked OK but I'm totally disappointed with the 3m spray adhesive. I went through 2 cans ($20) and tried thin and thick applications and didn't get it to stick as well as I expected. I wouldn't use it again. Any spray or brush on adhesive recommendations? Link to comment Share on other sites More sharing options...
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