So my system is quite loud. But I seem to have a sick addiction to bass. If you look at my sig you'll see my setup. Sub is rated 500 rms // monoblock is rated 600 rms


-- I want to either replace the 12" p3 with a 15" p3 (after selling the 12 and box I will only be out like 80 bucks). Thats rated the same rms

--Or get ANOTHER p3 12 and dual sealed box. (That will run me at least 160 after selling the old box) Then its 300x2 rms and I will be able to use all of the wattage.



Which is more cost-effective/louder? Opinions? Idk i think i want that 15 just to be a douche. haha. (and i can fit a 15 in the corner of the trunk, convenient) My lights dim more and more as time goes on so Ill prob need money for a new alternator :/



ps - ummm waittt can i even wire two 4ohm subs to a monoblock at 2 ohms?

 

I thought this was gunna be a fishing question. But I was wrong, dead wrong....

 

Yes, you can run two 4 ohms at 2 ohm, just wire them parallel, resistance drops to 2.

As far as "louder", you will probably get what you want from the 15". I'm guessing you like the really deep, shaking bass. A larger woofer can better reproduce lower freq sound. 2 12" subs should move more air assuming they are powered the same though, but like you said, they will take up more space. 2 12s with 600rms pushing it isn't terribly loud anyway, compared to say 2000+rms comp setups.

 

Hahahahaaa. More bass, plastic worms or spinnerbaits?

sorry to double post but we posted at the same time. and uhm its two DVCs though.

And yeah you guessed right - i like the deep bass thats makes my dashboard wave at me. Then I think I may end up with the 15, for the money and space. (and I have a 15" PA/keyboard amp in my basement that likes to make pictures fall off walls) thanks.


any other input? I prob wont do this for 2 weeks (paycheck?) anyway

 

what is the most $ your willing to spend on a sub

 

This bad boy.


Feel a 'lil twitch in your rod, give 'er a yank and hang on tight!

 

hahhaha THANKS MAN lll update everyone on my fishing endeavors

That number is limitless. I just want to keep the 600 rms monoblock. And I want cost-effectiveness. And I want to stay rockford. (no more experimenting with brand reliability. this brand is solid - I know it because i hurt my p3 everyday)

I was looking at the t series but it seems the 12" needs 800 rms and the 10" needs 600rms but I dont know if I would even get that much more volume over a 15" p3

 

the box makes more of a difference then the woofer. do you have room for a ported box?


and is the P3 a dual 4 or dual 2? they dont come in single 4

 

two dvc's won't work on a 2 ohm setup I don't think. If you series each of them then parallel the set, you get 4 ohms. If you parallel the whole setup, you get 1 ohm.

 

its daul 4 ohm and as i thought yeah i cant do it anyway :/

But as for the box. I have all the room in the world for a box (i was complaining about 2 12's cause i noticed dual 12s block the openings of trunks lol). Ill go ported 12 or even ported 15 but the opening to the trunk is so damn small...
ive been looking for a ported 15 box with a 15" side so it fits through the opening but if porting the 12 makes THAT much difference than maybe ill do that, idk.....

 

2 ported 12s is the loudest you can reasonably get in a cobalt. a ported 15 doesn't flow right

depends on the quality and build of a box but normally a "good" ported box is a minimum of twice as loud as a sealed box.

 

Yeah I just got sealed because I wanted simplicity and SQ but Ive heard many ported boxes and they usually sound fine...

Ill either be getting a ported box for my 12 or ill sell everything and get a sealed 15. Those are the only things that are worth the money I spend. (Im TRYING to save my money so I want results)

thanks

 

https://ssl.perfora.net/www.ficaraud...iew.shopscript

look in to FI, this is one of there models that can take 800rms (600rms is just fine) and it costs less than 200...fosgate is a very nice brand, but FI takes the cake in the sub department

 

Damn that seems like a good ass deal. But now I think i want to take this step by step. I have people lined up to buy whatever I have so I can go slow.

I think Ive decided to get a ported box for my 12 right now. If that doesnt satisfy then Ill look into FI and/or double-12ing it. It seems like 15's are a pain.

But fosgate recommends a 40hz tune for the P3. That seems awfully high...? I love rumble and I think rumble is way lower. Would the gods strike me down if I tuned for like 30?

 

a ported 12 is louder then a sealed 15... 30 is pretty damn low. i would go for 38-35 build the box big too

 

**** wordd i didnt realize how ridiculous venting is. Ive been looking at misinforming charts and I never did real research.

But uh def getting a ported box for the 12 (or maybe a ported 15 because this dude is offering me more than what I payed for this **** :O )
And I dont have to worry about hittin a bit over the recommended box size? It says mechanical power handling may be compromised. I dont want a sloppy sub

 

a ported 15 isn't a good idea. we just did a DD 9500 15 on a 2000w rms amp in an evo (ya i know) and it sounded like ass. we've done single 10s that are louder. a bigger sub requires more space and can only get louder if it can actually move more air. a bigger box= less air able to go back in the cab. a 15 will only get louder if the trunk is bigger to allow the air to go back forward

if the port is big enough then it wont sound sloppy. but the bigger box would make it louder. im not saying u need a 4cube box but just a lil bigger then fosgate recommends

 

True true I was thinking for just a bit bigger box too. Thanks you know your **** (I know you know that you know your **** but Ill say it anyway) And I feel you on the 15, it makes sense. Ill keep that size for my PA system.

when I stick this in a nice ported box Ill throw up a picture and tell how i like it. thanks again and thanks to everyone else too

 

oh yeah finally got a box. custom tuned to 36 hz -- 1.78 cf

that did the trick. its really........... really loud. Im sure technically it isn't - but to the untrained ear i would say 3x louder.

thanks

 

nice

 

hmm nice not a fan of p3's but sounds nice

 

All you need is 1 W7 and that thing will shatter your glass if turned up all the way, they hit so hard

They are well worth the money too

 

i'd listen to empjj specifically.

no offense to the other folks here, but honestly empjj is the only stereo guy on this forum I'd really listen to.....other than myself of course. lol

a w7 will not shatter your glass, unless you have your glass out of socket flailing around.

 

lol w7 are nice but dont really like tehm i like jj's re"s

 

my 1 12' will out thump a w7 any day and the only way im going to shatter my glass is by putting my foot through it