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View Full Version : Going from 2 12s to one 18 in mustang



Drew04
11-15-2013, 12:08 AM
Hey guys right now im running 2 12s in a ported box tuned to 34hz, about 1.7 for each sub in my 2004 mustang. the subs are in the trunk facing the rear.
RF T1500 bdcp @ 1ohm
Now my question is will going from my current setup to a walled 18 in my rear seats sound much better and pound the lows better with the same amount of power?
I will be buying a Fi Q18
Im thinking of going with a 6-7 cubic ft ported box for it does that sound right?
im going to be walling it and sealing it off and sound deadening my whole interior.
I guess my question is will this be worth it ? It will be my very first project

Chriszle
11-15-2013, 12:13 AM
Building a full wall for a single 18 seems kind of pointless, but to each his own. Maybe 2 18s, or 4 12s if it were me.

Babykinns
11-15-2013, 01:17 AM
Hey guys right now im running 2 12s in a ported box tuned to 34hz, about 1.7 for each sub in my 2004 mustang. the subs are in the trunk facing the rear.
RF T1500 bdcp @ 1ohm
Now my question is will going from my current setup to a walled 18 in my rear seats sound much better and pound the lows better with the same amount of power?
I will be buying a Fi Q18
Im thinking of going with a 6-7 cubic ft ported box for it does that sound right?
im going to be walling it and sealing it off and sound deadening my whole interior.
I guess my question is will this be worth it ? It will be my very first project

You would probably be a lot better off just stickin to the 12's. Depends on what 12's ur runnin though
Just picture the 2 12's as 1 24 vs 1 18

neo_styles
11-15-2013, 01:23 AM
You would probably be a lot better off just stickin to the 12's. Depends on what 12's ur runnin though
Just picture the 2 12's as 1 24 vs 1 18

You can't be serious

Side Show
11-15-2013, 01:24 AM
^^ this, whats your goal? hairtricks? or you just wanna be louder than what you are now?

myjaja
11-15-2013, 01:24 AM
You would probably be a lot better off just stickin to the 12's. Depends on what 12's ur runnin though
Just picture the 2 12's as 1 24 vs 1 18

Actually, it doesn't work that way. The single 18 would have just a tad more cone area than the two 12's.

OP, Which 12's do you have? Is it really worth walling it off for one 18 to you?

jrdnhsnbrg
11-15-2013, 01:28 AM
You would probably be a lot better off just stickin to the 12's. Depends on what 12's ur runnin though
Just picture the 2 12's as 1 24 vs 1 18

Uh, no.
Cone areas of:
2 12's: ~225 sq. in.
1 18: ~255 sq. in.
1 24: ~450 sq. in.

As cone diameter increases, cone area increases exponentially.

Timmy13091
11-15-2013, 01:32 AM
You would probably be a lot better off just stickin to the 12's. Depends on what 12's ur runnin though
Just picture the 2 12's as 1 24 vs 1 18

This fuckin guy ^

Edit... Thanks for the sig bro

Timmy13091
11-15-2013, 01:35 AM
Uh, no.
Cone areas of:
2 12's: ~225 sq. in.
1 18: ~255 sq. in.
1 24: ~450 sq. in.

As cone diameter increases, cone area increases exponentially.

Don't question him he obviously knows how to count :banghead:

Drew04
11-15-2013, 01:35 AM
Hey guys i have 2 12 RE audio sxx but the problem is they just dont get as loud or clean as i would like all i hear is rattle rattle rattle from my trunk.
Now with the 18 my goal is to have much louder cleaner deeper lower bass.
How big of a box do you guys think i would need for a fi q 18 ?

jrdnhsnbrg
11-15-2013, 01:37 AM
Personally, I'd go for like 4 or 6 monstrous 12's or 2 18's. One or the other. 6 12's will have more cone area than 2 18's, 5 12's is almost the same cone area as 2 18's. Cone area alone doesn't determine loudness. You gotta have a good box built to the specs of the subs to back it up, and a strong electrical system. What are you thinking about for subs? Amps? Electrical?

jrdnhsnbrg
11-15-2013, 01:39 AM
Hey guys i have 2 12 RE audio sxx but the problem is they just dont get as loud or clean as i would like all i hear is rattle rattle rattle from my trunk.
Now with the 18 my goal is to have much louder cleaner deeper lower bass.
How big of a box do you guys think i would need for a fi q 18 ?

That rattle means you need to get your hands on a lot of sound deadener and seal off the whole car. Doors, fenders, trunk, and floorboards if you really wanna get crazy with it. Is your box prefab?

Timmy13091
11-15-2013, 01:41 AM
Motor force > cone area ...

Drew04
11-15-2013, 01:43 AM
I honestly just want to do a single 18 as doing more will obviously mean more power and more money..
For electrical i have stock alt 105 amps i think, Big 3 and a d3400 xs power up front, 1 gauge wiring
I have a single t1500 and a t400 for my mids and highs
Im thinking of getting a Fi Q18

jrdnhsnbrg
11-15-2013, 01:44 AM
Motor force > cone area ...

Ah, yes, forgot about that one. Whoops :)

jrdnhsnbrg
11-15-2013, 01:46 AM
I honestly just want to do a single 18 as doing more will obviously mean more power and more money..
For electrical i have stock alt 105 amps i think, Big 3 and a d3400 xs power up front, 1 gauge wiring
I have a single t1500 and a t400 for my mids and highs
Im thinking of getting a Fi Q18

I wouldn't wall it off then. Do your seats fold down? How much trunk space do you have to work with?

Timmy13091
11-15-2013, 01:47 AM
I wouldn't wall it off then. Do your seats fold down? How much trunk space do you have to work with?

This ^ or buy 2 obsidian 18"s if your doing a wall .. They will sound clean as well .. Be about same price

audiobaun
11-15-2013, 01:54 AM
Id do a pair of 15s if the seat gets folded down..other than that,prob a set of heavy 12s in that car..Just me

jrdnhsnbrg
11-15-2013, 01:56 AM
Id do a pair of 15s if the seat gets folded down..other than that,prob a set of heavy 12s in that car..Just me

I was thinking if he was stuck on going with an 18 a upwards firing 18, port facing into the cab if the seats folded down or the trunk if not.

Drew04
11-15-2013, 02:05 AM
If i do a wall i have about 40in wide 30in tall and 20in depth to work with
my trunk is tiny i barely fit my box for my 12s and its about 3.5 cubic ft
will 2 15s be louder and get as low as one 18?

jrdnhsnbrg
11-15-2013, 02:08 AM
If i do a wall i have about 40in wide 30in tall and 20in depth to work with
my trunk is tiny i barely fit my box for my 12s and its about 3.5 cubic ft
will 2 15s be louder and get as low as one 18?

8's can get low in the right box... A big factor in how well a sub plays certain frequencies is determined by the box it's in. What is the tallest you can go in your trunk?

Drew04
11-15-2013, 02:17 AM
15 inches is the tallest i can go in my trunk about 32 inches wide and 24 inches in depth
but i would have to slide the box in through the rear seat area and the entrance is only about 28 inches wide
im just set on doing a wall because i want to try something new and want to have my full trunk space for my spare and stuff.

audiobaun
11-15-2013, 02:26 AM
If i do a wall i have about 40in wide 30in tall and 20in depth to work with
my trunk is tiny i barely fit my box for my 12s and its about 3.5 cubic ft
will 2 15s be louder and get as low as one 18?

With that amount of cu ft...Id run the 12s/heavy 12s..Im running 4.0@32 htz for a pair of 1k tens.You might get by with a single 15 with that cu ft spacing,to serve any justice at all,or a pair of good 12s.

Timmy13091
11-15-2013, 02:28 AM
If i do a wall i have about 40in wide 30in tall and 20in depth to work with
my trunk is tiny i barely fit my box for my 12s and its about 3.5 cubic ft
will 2 15s be louder and get as low as one 18?

Wait let me get this straight ... A 40 inch wide by 30in tall wall??????(that's a box) ... Wtf kinda car are you driving ?

audiobaun
11-15-2013, 02:30 AM
8's can get low in the right box... A big factor in how well a sub plays certain frequencies is determined by the box it's in. What is the tallest you can go in your trunk?

I wouldn't run a set of 8s but only for front staging..Most cant hit the lows/more of a punch than a low draw,to serve well for sub stage.FI SSD set of 12s will sound decent,or SA 12s,Gcons,PSI Plat 2.

myjaja
11-15-2013, 02:30 AM
I think you should just get a pair of sundown sa-12's and have someone build you a nice enclosure in the trunk with the subs and port facing into the cabin and sealed off. It'll look a whole lot nicer, play low if you tune it low and get plenty loud.

SounDrive
11-15-2013, 02:30 AM
Wait let me get this straight ... A 40 inch wide by 30in tall wall??????(that's a box) ... Wtf kinda car are you driving ?

He said mustang lol... NO trunk at all pretty much...

Timmy13091
11-15-2013, 02:32 AM
He said mustang lol... NO trunk at all pretty much...

Walling a stang no mater what year you'd still have bigger dimensions then that ...

myjaja
11-15-2013, 02:33 AM
Walling a stang no mater what year you'd still have bigger dimensions then that ...

Sounds like he's adding on the panels and seat to that measurement.

audiobaun
11-15-2013, 02:38 AM
Hell, even a pair of XFL 12s will get down in a good enclosure..prob rip that car apart with good electrical,and power

jrdnhsnbrg
11-15-2013, 02:38 AM
I wouldn't run a set of 8s but only for front staging..Most cant hit the lows/more of a punch than a low draw,to serve well for sub stage.FI SSD set of 12s will sound decent,or SA 12s,Gcons,PSI Plat 2.

I know, I was just using it as a point of reference.

Drew04
11-15-2013, 02:49 AM
I may have a little bit more space ill remeasure once i remove my rear seats and stuff but with that kind of space will it be good enough for one 18 if i want it to have at least 6 cubic ft ?

macsdad
11-15-2013, 07:38 AM
Dude, are you listening to these guys at all? See, the way it works is, you ask for help, they give help. Then run with what they help you with. Not, they give you help, then you keep asking the same question, over and over. So one more time, you would prob be better off with two beast 12's, ya dig? You got decent responses, not one azzhole answer, so listen aight?

NASTY08IMPALA
11-15-2013, 09:37 AM
Id switch to a monster pair of 12s quite a few of us do pretty well on them ..pick ur poison ..so many choices out.there. hdc4s tantric hdds aa.tc 5200.many more ..and then theres the custom route where you can hit up SPLaudio; and he can put together some crazy custom subs for alot less then u would think ..then get Buck; to design you a killer box and throw 5k to them and sit back and impress

shauncox26
11-15-2013, 10:30 AM
So I guess his re xxx 12's aren't beast enough. I would wall the trunk keep the xxx s and get a bigger more efficient amp like mmats. Just my .02.

SPLaudio
11-15-2013, 10:54 AM
thanx nasty ;)

xx is a sql sub not designed for spl. although i can rebuild them to make them alot louder

shauncox26
11-15-2013, 11:02 AM
I could of swore he wanted sql. If he wants all out spl though Corey's the man.

NASTY08IMPALA
11-15-2013, 11:18 AM
So I guess his re xxx 12's aren't beast enough. I would wall the trunk keep the xxx s and get a bigger more efficient amp like mmats. Just my .02.

Well hes running sxx not xxx huge difference.so...

shauncox26
11-15-2013, 11:27 AM
Thanks for the correction nasty. I second the motion to have them rebuilt now. Don't know how I missed the s in there.

Chriszle
11-15-2013, 11:44 AM
I wouldn't run a set of 8s but only for front staging..Most cant hit the lows/more of a punch than a low draw,to serve well for sub stage.FI SSD set of 12s will sound decent,or SA 12s,Gcons,PSI Plat 2.

I've seen 8 8s in a 4th order playing above 150 from 25-60 hz. I think they can play low.

Jes 42
11-15-2013, 11:47 AM
I may have a little bit more space ill remeasure once i remove my rear seats and stuff but with that kind of space will it be good enough for one 18 if i want it to have at least 6 cubic ft ?
Just traded my 04 Mustang around 6 months ago.I had 2-15's in mine and it got nasty but i had to take out the whole back seat and cut some sheet metal to get the right kind of box in it.They are a pita.I'd do whats been suggested with 2 beast 12's or a single monster 15.If you wanna wall an 18 in the trunk it can be done..Heres an idea:
http://www.youtube.com/watch?v=UyJBoHkpL74 ----- http://www.youtube.com/watch?feature=player_detailpage&v=LSaOswm5UFc
He's got a few vids of how it was done.^^^

basswiigee
11-15-2013, 11:50 AM
I'd just face the two 12's in to the cabin and seal off the trunk, (thats if you got a fold down seat) and facing them in (for me, in my car) takes away alot of rattles and sounds deeper and cleaner....

basswiigee
11-15-2013, 11:55 AM
Just traded my 04 Mustang around 6 months ago.I had 2-15's in mine and it got nasty but i had to take out the whole back seat and cut some sheet metal to get the right kind of box in it.They are a pita.I'd do whats been suggested with 2 beast 12's or a single monster 15.If you wanna wall an 18 in the trunk it can be done..Heres an idea:
2002 mustang gt System update/walk around - YouTube (http://www.youtube.com/watch?v=UyJBoHkpL74)

thats exactly how it looks when you open my trunk (but with better equip.) had subs facing up, knocked my 6x9's for a whirl, had them facing trunk, rattled and d*mn near took my fin off, faced 'em in and pure bassful bliss!!! lol and alot better sq...

Jes 42
11-15-2013, 12:00 PM
thats exactly how it looks when you open my trunk (but with better equip.) had subs facing up, knocked my 6x9's for a whirl, had them facing trunk, rattled and d*mn near took my fin off, faced 'em in and pure bassful bliss!!! lol and alot better sq...
Loved the sq in the Stang.Just no dam room for anything else.lol..Audio and a newborn baby wasn't gonna cut it in that little azz car.Suv now :)

basswiigee
11-15-2013, 12:05 PM
Loved the sq in the Stang.Just no dam room for anything else.lol..Audio and a newborn baby wasn't gonna cut it in that little azz car.Suv now :)

lol, how do you think i feel with this little a** cobalt... lol had to take out back seats to put a ported single sub box in!!! lol, but atleast the back seats got a button and the whole back seat comes out!!!
that 18 looks too big in there, the 12's fit perfect, without the trim cutting off half the sub!!! lol my box was 15in tall and 16in clearance, nice little snug fit!!!

Jes 42
11-15-2013, 12:12 PM
lol, how do you think i feel with this little a** cobalt... lol had to take out back seats to put a ported single sub box in!!! lol, but atleast the back seats got a button and the whole back seat comes out!!!
that 18 looks too big in there, the 12's fit perfect, without the trim cutting off half the sub!!! lol my box was 15in tall and 16in clearance, nice little snug fit!!!
You know how it is when someone gets gung ho about something.Just givin him an option.It can be done.Just a pita.

basswiigee
11-15-2013, 12:18 PM
You know how it is when someone gets gung ho about something.Just givin him an option.It can be done.Just a pita.

lol, I know I'm the same way... everybody tells me something and I'm like ok, ok, then do what i was gonna do anyway then think d*mn they were right and back to square one!!! lol 2 monster 12's would look better and sound better though...

Jes 42
11-15-2013, 12:23 PM
lol, I know I'm the same way... everybody tells me something and I'm like ok, ok, then do what i was gonna do anyway then think d*mn they were right and back to square one!!! lol 2 monster 12's would look better and sound better though...
Maybe he'll come back and tell us what he did but doubtful.

basswiigee
11-15-2013, 12:30 PM
Maybe he'll come back and tell us what he did but doubtful.

alot just come through get advice or their problem fixed, then poof gone, we don't even get no update pics or vidz!! lol

av83
11-15-2013, 12:33 PM
Two 10's in a proper box > two 12's squeezed into under 4 cubes in a mustang. Two beast 10's done up right is prefect in a stang.

Jes 42
11-15-2013, 12:34 PM
alot just come through get advice or their problem fixed, then poof gone, we don't even get no update pics or vidz!! lol

Hardcore and casual users.Like any other addiction.lol

4OZGLOVES
11-15-2013, 01:40 PM
You would probably be a lot better off just stickin to the 12's. Depends on what 12's ur runnin though
Just picture the 2 12's as 1 24 vs 1 18

Can the mods ban someone for being this ******* stupid.

blobb454
11-15-2013, 02:15 PM
I would just super glue two 24" subs together with no enclosure and pound away!!! Boss!