145-150dB, one 12inch, how to?

[5SpeedSER]

Well, i know blue has done it, and some of you other guys have great opinions on this sort of stuff, so i figured id ask.

Basically i want to go about building a setup that will possibly hit between 145 and 150dB. This will be going in the P5 at a later date, but right now in a friends escort. Size shouldnt be too big of a problem, as the trunks are pretty decently sized in each car. Weight is really no concern, other than it cant weight a ton (300lbs or less please).

Now my questions really are, what subs do you guys recommend? id really prefer something that has decent sql also (dont worry too much there though). Best buy sells power acoustik now (stupid note, but i noticed that today).

Box design? any ideas?

Amps?


HELP!?!?!

[walight01]

resonant engineering xxx series sub
adire brahma
jl w7
edesign a series

the good old mofo doesn't have tons of sq, but it would slam.

[MisterT]

Th weight of the box would be the biggest obstacle, but it may be done under 300lbs. You will need to add performance mods to make up for the weight added to your vehicle and heavy duty shocks so cops won't think you are carrying a dead body the size of Ed McMahon in your trunk! By the way, if you do this, good luck getting to your spare tire!

[blue LEDz]

Originally posted by walight01
resonant engineering xxx series sub
adire brahma
jl w7
edesign a series

the good old mofo doesn't have tons of sq, but it would slam.

don't forget IDmax, treo, and a few others but adire audio and RE are my 2 favorite right now either way you'll need a lot of power. 1,500 watts rms minimum, but it can be done with less. i'm using a 6th order bandpass box for my brahma 10, and it takes up about 4 cu ft of space. i'm trying for over 150 dB with just my single 10 many people have gotten great results with having a huge ported box tuned to peak at the cars resonant frequency, then have a port insert for daily driving, so it'll tune it lower, in the 20 hz range. i've heard that the p5's resonant freq is in the low to mid 40's, while the sedan is higher, right around 46-47 hz. either the XXX 12, or a brahma 12 will get you in the SPL range you want in a 3 cu ft ported box tuned to 40 hz. the XXX will get a little louder, though. and for daily driving i recomend having a port insert tuned to 23 hz. that will give it nice even, flat response, flatter than a sealed box and it'll play the lower freq's louder:p: eithe one will bump really well down to 20 hz. just make sure that the amp you get has a subsonic/infrasonic filter, so you can cut out the ultra low freq's that will damage your sub pick a sub, then we can help you pick an amp and box. you also want to consider a possible alternator upgrade, and at the very least a dual battery setup. how much are you planning on spending for this setup? that's an important factor

[5SpeedSER]

cost shouldnt really be any problem, as i am planning on doing this in stages. buying the sub, then the amp and wiring, then building the box and such. i should have the rest of the stereo in place before hand... but im still searching.

I think i wanna try to do this with a treo setup, as i have heard great things from them and not many people use treo.... so im being diffrent. Amp wise i dont care....

Give me a clue on what sub i should get, and amp in this case.... Blue, i trust your opinion alot, so if you say to do it one way, this is how it will probably be done

to you guys

[blue LEDz]

i've got to enter all the parameters into winISD, then i'll get back to you on which sub would be the best choice since i am assuming this is going to be a daily driver, i am also assuming you want one that will sound good when the port insert is installed. if you just want all out slam, and don't care if it sounds like ****, let me know.

[blue LEDz]

ok, after playing around with the #'s, and design, the way i would do it would be with the SSX 12. it's got great excursion, power handling, and proven to be a tuff sub i'd go with a 2.5 cu ft ported box, with the main port tuned to 41.89 hz. it'll peak at about 43-44 hz. from what i've been told, that is about the resonant freq. you'll want to have your car's resonant freq tested before you commit to a box, since if you sound dampen the freq can drop. for daily driving you'll need a port insert tuned to 22 hz. that'll get you a lot of bottom end bass for a preliminary port design, the main port i designed will be 3.5" wide by 10" tall by 16.5" deep. then the port insert will be 2" wide by 4.25" tall by 16.5" deep. that will give you a straight port, with still a decent amount of area for when the insert is in, so port noise should be a minimum, except between about 17-23 hz course good luck finding a song with those freq's course another idea would be to have 2 ports, and just cover the one that is not needed:p: one tuned high, one low. that will allow for a larger area port, which will greatly reduce any port noise which might be a good idea, since it will go in a p5 the only downside is that the the box will be slightly bigger and building it will take a little more work

[5SpeedSER]

well then ill have to go get the p5 tested this week or next, and ill get that to ya. also, damn, i cant say how helpful you have been thus far..... i will be keeping you updated on purchases now.... first off: the sub

[impact]

I say go with a 13W7 and run two 1000/1 to it. Build the box at about 3cu ported tuned at about 30-40hz. It will give at least a good 145db and still give you the sq that you are looking for. I run 2 12W7's and a 1000/1 in a sealed box and I'm at about 148db. JL is the way to go

[blue LEDz]

Originally posted by impact
I say go with a 13W7 and run two 1000/1 to it. Build the box at about 3cu ported tuned at about 30-40hz. It will give at least a good 145db and still give you the sq that you are looking for. I run 2 12W7's and a 1000/1 in a sealed box and I'm at about 148db. JL is the way to go

JL is not the way to go when it come to all out SPL they produce good SPL because of their design, which is having an ultra linear driver with high excurion, just like brahma's and XXX's for higher SPL you want it tuned to peak at the cars resonant freq, so 30-40 won't cut it. well maybe 40, but i don't know the exact resonant freq of a p5, do you by any chance? i heard it's around 43-44 where as the sedans are around 46-47. with the treo sub, and plenty of power, it could easily be capable of 150+ dB, if the box is built right hell, i did a 147.2 with one brahma 10, and with just a few adjustments, it's got a nice level response from 30-70 hz, then it trails off below and above that

as a side note to 5SpeedSER, i didn't put it in my last post, but DD makes treo subs

[impact]

The reason I said go with the W7 is that he wants SQ also not just SPL. From my personal exp[erience the W7 has performed well in both areas. As far as tuning of the box if you want a good sq tune it between 30-40hz you'll get the best of both if you do that.

[blue LEDz]

Originally posted by impact
The reason I said go with the W7 is that he wants SQ also not just SPL. From my personal exp[erience the W7 has performed well in both areas. As far as tuning of the box if you want a good sq tune it between 30-40hz you'll get the best of both if you do that.

as far as sql subs go, brahma's and XXX's are better than W7's for the SPL side of it, which is what he's mainly going for. and if you want better SQ, tune it lower, in the mid 20 hz range, depending on box size

Originally posted by 5SpeedSER
id really prefer something that has decent sql also (dont worry too much there though).

^^^ reason enough to recomend a sub like the treo, since it's better for daily driving than DD, but will still crank out some serious SPL

[5SpeedSER]

no jl in my car, im sorry but im not a big fan of jl audio... over priced imo.... treo is more my style, and i like their stuff better.... im gonna stick with it.

[blue LEDz]

Originally posted by 5SpeedSER
no jl in my car, im sorry but im not a big fan of jl audio... over priced imo.... treo is more my style, and i like their stuff better.... im gonna stick with it.

good choice in not following the crowd:p: and don't get me wrong, JL makes great products, but everyone saying they're the best is just plain wrong for SQ apps, velodyne is hands down the best subs, but too bad they aren't made anymore for SPL, well, there isn't exactly a "best" sub, but JL isn't even in the top 5 for it and components, i've heard that rainbow and a few others are all in the top slots and amps, well, you'd need specifics as to what constitutes the best amp. the feature i love about JL mono amps is the ablility to get full power from different loads

[MisterT]

The problem with their mono amps is that their class D amps are not efficient as other manufacturers class D amps. Not to knock JL because their amps kick ass from what I have heard. I too think they are overpriced and so many local shops have jumped on the bandwagon of selling what is popular nowadays. You sure pay for it too as a consumer! No matter what state the economy is in, I haven't seen the price in car audio go down any!! I know that it doesn't dictate helping the economy like housing and such, but you would think to stay afloat, one must be competitive in pricing. Face it, they know once bitten by the audio bug that it doesn't matter whether it is a poor economy or great economy when it comes to pricing their products.