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Loudest on low power..


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if not sealed off cabinfiring, you could do that make a nice difference ... yes 2 15s have more cone area but that also means a deeper lowers sounding bass your going to be getting if its a daily driver id says 12s are the best for that for there all around capability. depending on your taste for music to say the less.

15's or 12's dont matter it is how you tune the box and of course what the vehicles resonant frequency is.

what kind of truck and what are the usable measurements

2003 ford Expedition. Can use everything behind the 2nd row, so like 48 wide, the window line is about 17 high but can go higher if needed, I will check on depth but I've got lots..

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double layer all the way around. Outside dimensions

Height 17" Width 48" Depth 23"

Subs up and port firing to rear

Port 9" x 9" square 15" long

do a 3/4 roundover on all your edges

box will be tuned at 38.64hz and your 3db down point will be around 31hz

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From the hardcopy I have of the manual:

RFD2115

  • Voice coil diameter - 3"
  • Fs - 22Hz
  • QTS - .453
  • VAS - 6.39 cu. ft.
  • Xmax - .55"
  • SPL (db@ 1w/m) - 88.2
  • RMS Power - 500W
  • Max Power - 1k
  • Mounting Dia. - 13 & 13/16
  • Mounting Depth - 6 & 15/16
  • Speaker Dis. - .109 cu. ft.
  • Vented Box Volume - 2.5 cu. ft.
  • Port Diameter & Length - (1) 4"x8"
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double layer all the way around. Outside dimensions

Height 17" Width 48" Depth 23"

Subs up and port firing to rear

Port 9" x 9" square 15" long

do a 3/4 roundover on all your edges

box will be tuned at 38.64hz and your 3db down point will be around 31hz

Are port dimensions outside as well?

Thanks a ton for the help.

Also, is the box frequency relative to my vehiclle? Not questioning your knowledge, have heard good things about you, but i see so many people on here always saying stuff like "tune it to 33 or 34 hz.."

Lastly, any chances I could get a sketch up/cut sheet of this design? I Can't use that to save my ass.

Thanks again man.

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That's awesome man!

Does it change much that the subs are the 2115 not the 2215? I posted the correction as well as 2115 specs above ^^

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oh.. ok let me check but yes it will change some.. pm me your email and I will send you a pdf doc you can print

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