Masterbasser Posted December 29, 2017 Report Share Posted December 29, 2017 still tryna decide which way to go on my 2007 Yukon xl build, have 3 370 amp alts quad bracket, 4 dd m5s 2 80 ah lithiums and 3 group 31 agms was thinkin about staying behind the 3rd row with maybe 4 15s or 2 21s? anyone know the cone area of a 21 inch sub? don't see it on most charts post pics if ya got em Kenwood excelon ddx795 3 370 amp CES alternators (audio side only) McLaren dome tweeters Crescendo 6.5 ultra neos NVX JAD800.4 4 PA x4 SPL 18's 4 Digital Designs m5's at .7 ohms each 2 K2 80 ah lithiums 3 group 31 agms Ledglow million color (12 piece) 2007 Yukon xl Link to comment Share on other sites More sharing options...
Wishuponasub Posted December 29, 2017 Report Share Posted December 29, 2017 I don't know how good they are but Incriminator Audio makes a few series of 21" subs. You can check them out at SSA. I see that B2 audio also has some 21" options. Sitting around waiting to be installed: 4 FI X 10 270 CES alt D3400/73ah lithium AA 3800.1 (2) AA 75.4 Link to comment Share on other sites More sharing options...
Joe X Posted December 29, 2017 Report Share Posted December 29, 2017 Sd of a 21 would be around 1500-1600 square centimeters. Link to comment Share on other sites More sharing options...
Masterbasser Posted December 31, 2017 Author Report Share Posted December 31, 2017 how does that compare with an 18? I see charts of 8-18 size at inches, no 21s tho lol. I dunno I'm just looking for options I suppose even a good 21 wontt ake 2 dd m5s daily anyways, maybe 4 15s back there would be better, but I feel like that wouldn't be loud enough Kenwood excelon ddx795 3 370 amp CES alternators (audio side only) McLaren dome tweeters Crescendo 6.5 ultra neos NVX JAD800.4 4 PA x4 SPL 18's 4 Digital Designs m5's at .7 ohms each 2 K2 80 ah lithiums 3 group 31 agms Ledglow million color (12 piece) 2007 Yukon xl Link to comment Share on other sites More sharing options...
Thomas1994 Posted December 31, 2017 Report Share Posted December 31, 2017 B2, Incrimantor Audio, and possibly sundown? make one. Not sure what is good but idk of anyone else that makes one. ***sundown is a 24in sub*** Link to comment Share on other sites More sharing options...
Mitchaford Posted December 31, 2017 Report Share Posted December 31, 2017 I'd do four 15s over two 21s with that type of power. Four of these: http://www.ficaraudio.com/product/omega-series-omega-15/ 2008 VW Jetta Team Fi 12 CT 4000.1 CT 125.4 PWX 6.5 80 PRS EB Flex 2/0 Second Skin ^^^ Build ^^^ Link to comment Share on other sites More sharing options...
Thomas1994 Posted January 1, 2018 Report Share Posted January 1, 2018 2 Incrimantor Audio Warden 21s would handle the power being neos... Link to comment Share on other sites More sharing options...
BobbyG2 Posted January 2, 2018 Report Share Posted January 2, 2018 Stereo Integrity makes 24" subs. Their current flagship is rated for 5000 watts RMS, but they teased on their Facebook page that they'll soon start offering a new model that takes even more than that. Sundown as already mentioned can also build you 24" subs. A 24" sub has almost as much cone area as 2 18" subs. Take a look at the "SD" parameter of the sub, that's the effective cone area of the sub. *New vehicle and system coming soon.* Link to comment Share on other sites More sharing options...
Thomas1994 Posted January 3, 2018 Report Share Posted January 3, 2018 http://gpcaraudio.com/alphard-audio-apocalypse-db-sa521-neo-21-subwoofer/ Link to comment Share on other sites More sharing options...
Incriminator Posted January 3, 2018 Report Share Posted January 3, 2018 - We have the DP21 (2000 RMS), Judge 21 (2500 RMS), and the Warden 21 (3500 RMS). All of those are good options! Link to comment Share on other sites More sharing options...
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