Two 8" vs. One 15"
|
Silver Member Username: MgbcsLincoln, Nebraska Post Number: 410 Registered: Dec-06 | I was just pondering this as I am sitting around the dorms bored off my a**. With no particular brands or models, what would the differences be between 2 8" and 1 15"? Cone area is virtually the same, but the 2 8" would require much less box volume (which doesn't make sense to me btw). Anyway, this is probably a dumb question, but, with the same subs in these two sizes, could you get the 2 8" as loud as the 15"? What would differences be in SPL, SQ, and the notes they would hit? Thanks for the info! |
|
Gold Member Username: SouthernrebelMonroe, Louisiana DD 9515d~~]... Post Number: 4483 Registered: Mar-04 | 2 8's have MUCH less area than 1 15. 8" Sd: 0.020 m^2 15" Sd: 0.0806 m^2 You would need 4 or more 8's to equal the same cone area of 1 15". |
|
Silver Member Username: Tremor1127You aint wangin till y... Post Number: 952 Registered: Aug-06 | very debatable question. but the 15 tuned right would hit awesome lows that i doubt the 8s would be able to do... |
|
Silver Member Username: 40hzN.C. Usa Post Number: 130 Registered: Dec-06 | cone area on 2 8s would be 100 inches(50 each) 176 on a 15.the way they are making subs now,like DDs,those 8s,higher series handle tons of power would prolly out hit alot of 15s. |
|
Silver Member Username: Tremor1127You aint wangin till y... Post Number: 953 Registered: Aug-06 | and i think two 8s is actually quite abit less than the 15... |
|
Silver Member Username: Tremor1127You aint wangin till y... Post Number: 954 Registered: Aug-06 | what they said about the cone area...  |
|
Silver Member Username: Tremor1127You aint wangin till y... Post Number: 955 Registered: Aug-06 | livin', loudwhat is the surface area of an 18"? |
|
Silver Member Username: MgbcsLincoln, Nebraska Post Number: 412 Registered: Dec-06 | OK fine...I give in lol. I wasn't considering the actual formula for figuring it out...I was stupid and just did 8+8>15. Anyway, I was just wondering if it would make more sense to do 2 8" and 1 15" if you don't wanna give up the room neccessary for 2 15". |
|
Gold Member Username: WingmanaliveA pic is worth 1000 words Post Number: 3934 Registered: Jun-06 | Personally, I would take a good 15" over any # of 8's, 10's, 12's, or whatever. |
|
Platinum Member Username: Rovin1 12 Atomic ... Post Number: 10782 Registered: Jul-05 | i see some ppl did not pay attention in math class .... |
|
Silver Member Username: MgbcsLincoln, Nebraska Post Number: 414 Registered: Dec-06 | lol i'm in calculus thank you very much  it's after 2:30 so my brain is shut off for the night  |
|
Silver Member Username: MgbcsLincoln, Nebraska Post Number: 415 Registered: Dec-06 | ok...to make up for my stupidity: The following are approximate equivalents... Ten 8" Seven 10" Five 12" Three 15" Two 18"  |
|
Silver Member Username: 40hzN.C. Usa Post Number: 133 Registered: Dec-06 | Tremor 1 18 is 256 sq in cone area |
|
Gold Member Username: Livin_loud18 of Love Fi Audio Post Number: 1169 Registered: Jan-06 | see what people aren't taking into factor, though i don't know if it is possible to calculate, is the depth of the cone and whatnot. were not talking about a flat surface here... |
|
Gold Member Username: JohnfiacIL Afghanistan,... Post Number: 1577 Registered: Mar-06 | as for sq\spl and all bigger ussualy get you more SPL and lower notes... smaller subs like a 8 will let you hit the higher notes with better SQ then lets say a 15.. the bigger the lower notes.. the smaller the higher the notes.. think about subs, they big, mids are small, and tweets r tiny, the faster they got to move the smaller the better, the slower they have to move the bigger the better |
|
Gold Member Username: JohnfiacIL Afghanistan,... Post Number: 1578 Registered: Mar-06 | sorry not really better sq then a 15...it depends on what freq your playing***** |
|
Bronze Member Username: RemotiaPost Number: 11 Registered: May-06 | whao.. i see lots of erros here #1, the depth of the cone does not matter, its only the surface area of a flat surface from about 1/3 of the surround to the other 1/3 #2 8" drivers have effect areas of about a 6" to a 7" circle 15" drivers can be closer to 11"-13.5" much of this depends on the surround rule of thumb in m^2 8" 0.018 10" 0.031 12" 0.048 15" 0.082 18" 0.110 thats off the top of my head, i may be off a little, but from here you can just ADD and see two 8's are not going to stand a change againts a 15, even a weak one. |
|
Gold Member Username: JohnfiacIL Afghanistan,... Post Number: 1580 Registered: Mar-06 | i think some subs also consider there surround as space to.. like DD unless i misread the page.. depends on the design i guess |
|
Gold Member Username: JohnfiacIL Afghanistan,... Post Number: 1581 Registered: Mar-06 | http://www.ddaudio.com/dd/caraudio/features/EROMSurround.asp |
|
Gold Member Username: AdddisorderWest palm, Florida Post Number: 3410 Registered: Jan-06 | its all install dependant like everything else. a 15 has more potential then 2 8s due to more cone area. but there are people breaking 150 with 2 8s probly even 1 but im not positive but we have guys on here cough cough CHAD who cant hit 150 with 2 15s |
|
Gold Member Username: Tdeaton1021Near Tampa, Florida USA Post Number: 3876 Registered: Sep-04 | pete at TTB just hit 141 at 41 hz in a daily box with two 8s and 400w.... but we all cant do that lol. |
Main Forums
Today's Posts- Home Audio Forum
- Home Video Forum
- Home Theater Forum
- Car Audio Forum
- Accessories Forum
- All Forum Topics