Swordlordboy1234 Posted October 29, 2016 Report Share Posted October 29, 2016 The 3.2 cubes is after raising the seat 2.5 inches. And that's based on an outifre box not a downfire. Downfire costs a lot of volume because of the space needed between floor and sub. Since you have space to kill I would say try to down fire the subs. I have had great success with the subs and port 90 deg out of phase with the subs loading on the floor. So a sub down port forward under the seat box? Also 800RMS on 2 SA 8's i think that is under powering a little but that would be fine. Another factor in terms of subs is how power vs box size works together. Theoretically you could run less power and build a larger spec box and still get the subs to the proper peak to peak throw for optimal output. Anyways. Play around with numbers and see if a 2 8's down fire ported box would work for you bud. Quote My old YouTube channel : http://www.youtube.com/user/SwordLords1234?feature=mhee My old build log : http://www.stevemeadedesigns.com/board/topic/161872-96-accord-b2-sundown-sky-high-dc-power-re-re-build-for-heatwave/page-37 My New Build - http://www.stevemeadedesigns.com/board/topic/207041-2016-mazda-6-sql-build/ 2016 Mazda 6 Touring JL Fix 86 - OEM signal correction B2 prototype DSP 6to8 B2 Ref63 - 3 way active set 2 B2 Class H quattro's 1 B2 Zero.5R @.5 2 B2 HNv3 12 d2 B2 SLIP40 - Lithium in the trunk Northstar Group 35 under the hood 100ft 2/0 welding cable 30ft 4ga welding cable 20ft 8ga welding cable All stinger OFC speaker wire Soundrive custom RCA's Tons of attention to detail.... Can it be perfect? Link to comment Share on other sites More sharing options...
Robert Harrell Posted February 15, 2022 Report Share Posted February 15, 2022 I have 4 Sundown 12in. U's in a 2012 Chrysler Town & Country With 82.3 in³ it is With Is 3rd row laying down And using A sundown salt 4 Amp Is in a ported Box 2 and a 1/2 ft³ 4 each Woofer What I'd like to know is Is a enough airspace for them and And is the sundown salt for a strong enough Quote Link to comment Share on other sites More sharing options...
audiofanaticz Posted February 15, 2022 Report Share Posted February 15, 2022 This is a under seat box I built last summer for a guy with a pair of the newest X-8's on a Sundown SFB-2000 in a 05 GMC Sierra without doing a seat lift. I built the box a tad larger than spec (cant remember exact size I would need to find my box plans if I still have them) for increased efficiency and to get tuning a little lower than due to limitations on the port length. No issues what so ever. Granted going larger then recommended can turn to a nightmare fast if you don't know what you're doing or know what to listen for mechanically wise on the sub(s). So for the SA-8s if they are the V3 series I probably wouldn't go anything larger than 0.4 - 0.7 cubic feet larger for both subs together. So ideally 1.9 - 2.2 cubic feet after sub/port/bracing displacement is subtracted for your 940ish watts you have. If you go too much larger than that you could potentially run into unloading issues but its hard to say since your not giving the subs their full rms wattage. 1 Quote Link to comment Share on other sites More sharing options...
Dad Posted October 17 Report Share Posted October 17 Built a box …birch pine 3/4 ,and made the mistake of a much larger enclosure than needed ,(Sundown v.2 12 d2 ) with that said 2.6 cu ft was too much so I added wood in the corners small cut strips ,then added larger pieces on the inside walls port walls side wall top and bottom and if math is right I’m at 2.2 now and it drops low for sure ,my question is should I go smaller .?spec is 1.75 and I might as well build another one to achieve this .Will it damage speaker overtime? It sounds amazing. Also My port tuning may be a little off ,I have overall 25 inches one 11 another 14 x15.5 3-4 ….2.5 inches wide slot. Looking for expert advice here . Thankyou Quote Link to comment Share on other sites More sharing options...
Kyblack76 Posted October 22 Report Share Posted October 22 If it sounds good, why care. Quote SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
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