18 vs 2 12's
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Gold Member Username: MendonmafiaUSA Post Number: 1419 Registered: Aug-06 | looking to get a new subs setup possibly or at leat an alternate setup. looking to get an 18" alpha or 2 12" Q's. the Q's will be ran 5 cubes net @ 32 hz. the alpha will be sealed 5-6 ish cubes. both on 2000 watts rms. which would be louder or sound better? if i decide to port the alpha how much area should i go for and box size? |
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Gold Member Username: JkidderWorlds gunna end, In 2012 Post Number: 3798 Registered: Nov-05 | https://www.ecoustics.com/electronics/forum/car-audio/515120.html 18 vs 2 12s... jk |
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Gold Member Username: CtmikeCt. Post Number: 6501 Registered: Feb-06 | i'd go with the qs'. |
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Gold Member Username: Snowball123West Allis, WI United States Post Number: 1065 Registered: Oct-07 | yeah i say go with the q's also. |
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Gold Member Username: MendonmafiaUSA Post Number: 1422 Registered: Aug-06 | word. would an 18" q be as loud as 2 12" q's. i would like to save some money if possible and only buy a single sub. |
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Silver Member Username: CozcePost Number: 246 Registered: Mar-08 | 18 should be louder... |
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Gold Member Username: MendonmafiaUSA Post Number: 1423 Registered: Aug-06 | even though it can only take half the power? shouldnt the alpha be louder then. since it can take = wattage as 2 12" q's |
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Silver Member Username: CozcePost Number: 247 Registered: Mar-08 | What do you mean half-the power? The Alpha should be able to take 2000 watts. |
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Gold Member Username: MendonmafiaUSA Post Number: 1424 Registered: Aug-06 | i mean the sx 18" |
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Gold Member Username: TanmanfoshoFi SSD15 Wangers Post Number: 1129 Registered: Nov-06 | 18 will hit the lows way harder |
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Silver Member Username: CozcePost Number: 248 Registered: Mar-08 | I say get the 18in Alpha... |
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Gold Member Username: FrkkevinTeam DLSSuperNatural... Post Number: 5550 Registered: Nov-05 | 18s don't hit the lows and harder than a 12 would.. get the 12s.. they will be louder on the same power and take up less room even for 1 18 ported you can do 3 ported 12s to seal up the 18? waste. ive messed with an SX 18 lately.. it go loud for sure but too up just too much room.. you can easily get two 12s louder than a single 18 |
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Silver Member Username: CozcePost Number: 249 Registered: Mar-08 | lol. I'd go with Jack says, he definitely knows more about this stuff than I do. I'm just becoming a fan of 1 sub setups. lol |
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Gold Member Username: FrkkevinTeam DLSSuperNatural... Post Number: 5551 Registered: Nov-05 | 1 sub setups are great for budget or to save room but i currently run 1 RE XXX 15" and would love to switch it up to two subs again.. you just don't get the same effect running 1 sub vs two the extra sound displacement and moving mass makes a big diff but honestly.. i'd stay away from the 18.. being sealed would be a waste when you can do the 2 12s ported.. the two Qs will make you very happy... (even though i would choose diff subs :P) anyway, go with the Qs |
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Gold Member Username: 04redmach1Es DEALER, GA USA Post Number: 2342 Registered: Mar-06 | Go with 2 12's IMO. You should look at the new Sonance V.2 if wanting 2 12's at 2000 rms  I got 2 of the Sonance V.2's on a 1750.1 and they sound AWESOME, and get pretty loud. Mid 40's at 38hz Kevin |
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Gold Member Username: MendonmafiaUSA Post Number: 1425 Registered: Aug-06 | what would you choose over the 12" q's? |
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Gold Member Username: FrkkevinTeam DLSSuperNatural... Post Number: 5552 Registered: Nov-05 | two 04/05 XXX 12s if you could find them ...depends on your budget? I take it your going SQL? |
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Gold Member Username: MendonmafiaUSA Post Number: 1426 Registered: Aug-06 | i only have 2k rms. even if i wanted a new amp i would have to buy a different H/O alt or batteries and i am not ready for that upgrade yet financially. i was considering running a single 15 xxx but didnt think it would be louder than the 2 12" q's or single 18" alpha. i could possibly run an 18"xxx tho. yea sql. |
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Gold Member Username: FrkkevinTeam DLSSuperNatural... Post Number: 5556 Registered: Nov-05 | two XXXs would run fine on 2000rms.. they are pretty efficient subs and don't need much power to get going a single ported XXX 15 on 2k would get close to as loud as the 2 12" Qs... i'd run the XXX over the Qs any day.. its a simple setup but it won't move as much air as those two 12s.. but it is pure ear sex would be a cheaper option as well.. but if you want to show off mad flex or everything lol, you don't get a whole bunch from a single sub |
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Gold Member Username: MendonmafiaUSA Post Number: 1428 Registered: Aug-06 | technically speaking wouldnt a single 12 inch xxx move almost as much air as 2 12" q's due to it having nearly twice the x max? so do you thin i should go for an xxx 18 then? would it be a huge loss if i got a new one if i cant find an 04/05? is there something else you would recommend? |
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Gold Member Username: FrkkevinTeam DLSSuperNatural... Post Number: 5563 Registered: Nov-05 | no 18s man.. why do people have this thing for 18s? they are a waste.. for the volume needed to run one properly you could run 15s and get almost twice as much volume displacement with the same space requirements and no.. xmax is not the only factor in moving air.. think about volume displaced per square inches.. 2 12s.. thats twice the cone area.. the xxx will move a lot of air but not as much as 2 12s unless the xmax is very little lol and if you want a new one plan on spending a pretty penny.. XXX 18.. easily $800 for the new model if you can find one used 04/05 used xbl^2.. thats what made them such a great sql driver.. i don't recommend the new XXX series you have to consider moving mass as well.. only thing i hate about single sub setups is i like flex.. i want to feel it not just hear it.. more moving mass gives a lot stronger effect to go with the sound reproduced |
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Silver Member Username: Basebalz13Moneta, Va Usa Post Number: 626 Registered: Aug-07 | unless you run 2 18's hehe |
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Silver Member Username: CozcePost Number: 250 Registered: Mar-08 | Jack, I'm confused how a single 15 would get close to as loud as 2 12's but a 18 wouldn't typically be louder than the 12's...based on cone area? Not trying to be mean or anything, just wanting to try and understand. |
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Silver Member Username: Basebalz13Moneta, Va Usa Post Number: 629 Registered: Aug-07 | i think because the 18 is sealed and 15 would be ported |
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Silver Member Username: CozcePost Number: 253 Registered: Mar-08 | Oh Yeah! lol thanks d-money sorry jack |
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Gold Member Username: FrkkevinTeam DLSSuperNatural... Post Number: 5564 Registered: Nov-05 | its ok lol and i would never run 2 18s either.. i'd go with 4 15s over 2 18s any day |
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Gold Member Username: MendonmafiaUSA Post Number: 1429 Registered: Aug-06 | i could run an 18" xxx ported. should i go for it over the 12" q's. how about a bl 18 or btl |
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Gold Member Username: MendonmafiaUSA Post Number: 1430 Registered: Aug-06 | o an btw, to clarify what iw as talking about with the single 12" xxx vs 2 12" q's. since the xxx has nearly twice the x max as a q, a single xxx should be able to displace twice what a single q should. thus requiring two q's to displace the same volume of air. to calculate the volume of air displaced you need to multiply xmax times cone area. or peak to peak either way its a relative dimension and as long as both calculations are consistent it dosnt matter. |
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Gold Member Username: MendonmafiaUSA Post Number: 1431 Registered: Aug-06 | i think i might get 4 12 inch dc level 2's. only 300 rms but yet have 18mm x max. |
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Silver Member Username: CozcePost Number: 256 Registered: Mar-08 |  |
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Platinum Member Username: Rovin1 15 = 149.5 DBsTrinidad & T... Post Number: 14157 Registered: Jul-05 | i agree with the 1 single RE 15" XXX suggestion ... |
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Gold Member Username: Hittin1Lake Charles, La. United States Post Number: 1266 Registered: May-07 | if u go with the 18" alpha.... you'll want 6 cu ft @ 35 hz... My 18" alpha's hit the lows nicely. |
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Gold Member Username: Hittin1Lake Charles, La. United States Post Number: 1267 Registered: May-07 | ^^^ 40-45 sq in of port |
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Gold Member Username: MendonmafiaUSA Post Number: 1432 Registered: Aug-06 | wow i can easily fit that box. thats a small port. i would prob do 60in at least im gonna shoot for 100 tho. |
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Gold Member Username: Hittin1Lake Charles, La. United States Post Number: 1269 Registered: May-07 | Got that port recommendation from Steve Miller... HE and his desiples have tried all different sizes.... That is what he recommends for a daily driver and still gettin' good #'[s. |
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Gold Member Username: FrkkevinTeam DLSSuperNatural... Post Number: 5574 Registered: Nov-05 | if you want to run a ported 18 why not run two ported 15s? 18s are just a waste im sorry  if you want an RE SX 18" ill sell you one lol |
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Gold Member Username: Hittin1Lake Charles, La. United States Post Number: 1271 Registered: May-07 | i want 1 more 18" alpha |
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Gold Member Username: TejcurrentPost Number: 1519 Registered: Apr-07 | I really like my 18s. I understand what you're saying you could fit 2 15s in the same box, but personally I prefer them. You could also argue why not use 6-8 10s or 4 12s. It's just so much easier to just throw one large sub in a box. I guess it's just a matter of preference. |
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Gold Member Username: Hittin1Lake Charles, La. United States Post Number: 1275 Registered: May-07 | "18s are just a waste im sorry" i do not agree.. a lil overkill...maybe. lol |
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Platinum Member Username: Rovin1 15 = 149.5 DBsTrinidad & T... Post Number: 14161 Registered: Jul-05 | typical box for a 18 is really big & heavy - i bet it would actually reduced gas mileage a tad hauling around that ... |
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Gold Member Username: MendonmafiaUSA Post Number: 1433 Registered: Aug-06 | yea my box now for my 12's weighs over 70 lbs plus another 50 for the subs and it doews hurt a bit but not bad. i think i migh ttry to run 4 12 of some sort. the main reason i wanted to get the 18" alpha is becasue i heard the alpha was an awesome sub and i could get one for a good price. 4 12's is gonna cost me easliy $500 to get the kind of output and sq that im looking for. i think i might switch back to kappa perfects. throw 4 12's in 7 cubes tuned to 32 hz. should be ear sex. |
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Gold Member Username: MendonmafiaUSA Post Number: 1434 Registered: Aug-06 | i just did a bunch of calculations and you get the most cone area per cubic foot of air space by using more smaller drivers. i may even decide to run like 10 8's or something if i can find the right price. |
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Platinum Member Username: InsearchofbassPost Number: 10508 Registered: Jun-04 | Mark Scafetta...."im gonna shoot for 100 tho" I dont recommend that. "Got that port recommendation from Steve Miller... HE and his desiples have tried all different sizes.... That is what he recommends for a daily driver and still gettin' good #'[s." If you do buy from them id follow that advice. |
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New member Username: TooloudforyouPost Number: 3 Registered: Aug-08 | the one 18" has a considerable ammount more cone area then the 2 12s and since both would be recieving the same ammount of power in theory the 1 18" would be louder. i also believe that the single 18 will shred the lows alot more then the 2 12s will although the Fi Qs do have a reputation of having excellent quality. What i see as a benefit for an 18 is that the bring an "awwww" factor into the equation, by this i mean its not everyday that one of your friends or family members get to see an 18" sub. all in all i say get the 18" alpha and have fun with it. |
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Gold Member Username: Hittin1Lake Charles, La. United States Post Number: 1283 Registered: May-07 | "If you do buy from them id follow that advice." Mark Scaffeta, in case you don't know.... Steve Miller is the owner of RD audio. "all in all i say get the 18" alpha and have fun with it." couldn't agree more |
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Bronze Member Username: Kingandsons07Lincoln, TEAM RD USA Post Number: 75 Registered: Aug-08 | 18FTW |
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Gold Member Username: Goodie_goopMid town, Texas U.S. Post Number: 1041 Registered: Oct-06 | loved my 18" alpher... |
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Gold Member Username: MendonmafiaUSA Post Number: 1435 Registered: Aug-06 | word. ill buy it then if its still available. even if i dont like it its not that much money invested. only the time for designing and building the box, but thats that fun part anyways. |
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Gold Member Username: Livin_loudPost Number: 2625 Registered: Jan-06 | i'm saying goodbye to my 18" Q tonight :/ and hello to a AQ HD315 next week if you have the room for an 18", do it. nothing hits the lows like them. don't bother if you have a trunk though, unless your talking continental sized |
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Gold Member Username: MendonmafiaUSA Post Number: 1437 Registered: Aug-06 | i got a trunk but i got enough room. |
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