Hi at the moment i got a 12' sub running at 400watt rms bridged justb wondering if there would be any benefits running a second one and unbridging the existing one

if you use the right box it will make a difference ask s-tim-ulate or eek about what sort of box to use and give them some details of the sub model and the amp details aswell

its really up to you, if you feel the need for more bass do it otherwise spend it on other things, upgrading your wiring or something

thanks guys just wondering though if theres any benefits running two subs at 200w each compared to one at 400

it costs you lotsa money :doubt: i dunno im just saying maybe theres better ways to spend your money

Probably not really worth it

no use running 2 subs at same power of 1 sub, thats just a waste of a sub, either save your money, or buy another sub/amp combo or else your not going to hear much difference

yoyoooooooo

waddayaup daaawwwgg.

get 2 subs yoooooo, if u wanna be fully sick and get all the chickybabes yeah.


ok, no maybe not.


oohhh, i dunno

12hours of uni today...8am-8pm :doubt:

don't get another sub. if you do, might as well give it to me...what do ya say? gimmie a sub?

Go another sub of the same Model..

Advantages
1.Makes the Boot install look trick
2. will give you clearer Bass
3. More Bass Volume

Disadvantages
1. Less Over all loudness as you will be halving the power you have to your current one
2. More Wiring and Enclosure will be needed
3. Less boot space available..

Go another sub of the same Model..

Advantages
1.Makes the Boot install look trick
2. will give you clearer Bass
3. More Bass Volume

Disadvantages
1. Less Over all loudness as you will be halving the power you have to your current one
2. More Wiring and Enclosure will be needed
3. Less boot space available..

disadvantages- seriously outweigh the advantages of a 'blingy' boot :P

I could not bare going back to a single sub !!! once you have Two you need to have more!!

I could not bare going back to a single sub !!! once you have Two you need to have more!!


guess what































I'm a little teapot

Nahhh, move from 2 12s to a 15!! :cool:


and you'll regret it. stay with 12s. get a single 12, looks tidy :cool:

Too much Lag not good enough for Happy Hardcore and Trance !! Two 12's gives me all the Bass I need from happy hardcore Beats to R&B bass lines

Too much Lag not good enough for Happy Hardcore and Trance !! Two 12's gives me all the Bass I need from happy hardcore Beats to R&B bass lines


Happy Hardcore Rule Uleh!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

What magnet said is correct, as i did the exact same thing before i got my new amp. Basically it's alot bassier, but you will lose "loudness".

thanks for the help i thinking about a new sub just tossing up between that and a ipod adapter :D

You could always add another 12 and use it as a passive radiator 3db increase right there... oops sorry I can do that with my G5 ( im loving that thing! ). Really 1 quality 12 is enough bass for most people. If a single 12 isnt loud enough just change the box to ported or bandbass, that will give you increased db. :badgrin:

Adding an extra sub (so its 2 subs off 200 w each) will add 3db as the surface area doubles

To put it in comparison, a 10 db increase is perceived as being twice as loud.

Has anyone asked the big question... What sub?

There are many 12" subs at the high end that will outperform 2 cheaper 15" subs. All about build quality, sensitivity, and their actual specs.

The size of a sub isnt the be all and end all. I've seen 10"s that get pretty damn loud...

How much will the extra sub put you back? What box you got now? Full system specs plz, we may be able to put ur extra kish kash to better use

Actually, the overall loudness should be the same, give or take.

You see, double the power is an extra 3 dbs.
So your cutting you sub from 400 watts to 200 watts, so now youll be 3db down in sound.

But now you add another sub at 200 watts, which will add 3db on the current 200 watt sub, so now your up 3db.

So in theory 2 subs at 200 watts should sound the same as 1 sub at 400 watts.

But then of course there are so many factors which could change weather the new system will sound better/worse or louder/softer with the 2 subs.

But no its not worth it, if you want louder bass you need more power and hence your gonna need bigger amps. Or you can get a ported the box if its not ported already.

Double the cone area = 3db

Double the power = 3db

2 subs at 200 w each will be 3db louder than 1 sub at 400 w....

That's in a perfect world. I must admit, in the car environment it is different as there are issues with power. (eg if both subs are running off the same battery.)
Also acoustic issues.

But in terms of physics you can stick with 2 identical subs = +3db, Double the power = 3db

Peace

Tim

tim youve just contradicted yourself, or maybe you made a mistake.

"Double the cone area = 3db

Double the power = 3db

2 subs at 200 w each will be 3db louder than 1 sub at 400 w...."

Your last line is wrong, 2 subs at 200 watts each will be the same as one sub at 400 watts.

You even said it yourself, double the power is a 3db gain, so if we half the power its a negative 3db gain.
So now we have gone from 400 watts to 200 watts and were at a -3db gain.
Now we add another sub at 200 watts, which is double the cone area at the same power which gives us a 3db gain, you said this yourself, so no were back up to 2 x 200 watts subs and back to same db rating.

2 x 200 watts is still 400 watts... 400 watts is going to be as loud as 400 watts not matter how many subs youve got, you dont get something for free.

Soz mate... I know it sounds wrong but...

Double the surface area with the same sub/box= 3db gain...

The above is a general term... To understand exactly why this works:

1. Adding one sound to another sound of the same amplitude will gain you 3dB.

2. Adding one sound to another sound of the same amplitude and phase will gain you 6dB.

This is where the extra 3db comes from.
As both subs are playing in phase (easy to do with low bass notes) the SPL increases by 6db to make up for the 3db we lost when we halved the power to each sub....

Peace

Tim

:shock: really? so does that mean 3 subs will give a 9db gain?
hmm i thought this has been covered over at caa many times, i never read anything about wave gaining.
Then again, technically speaking, you can run 2 subs, at say 1000 watts each and run them perfectly out of phase and get NO sound what so ever.

That would be an awesome sight in my opinion, imagine seeing two subs pumping real f*****g hard and making no noise what so ever, that would trip many people out.

even nasa employs this technique to try and quite the space shuttle launches... **** im off topic lol

just did some reading, your write tim :p stoopid me.

I guess 4 subs would give 6 db gain or so... Somewhere in between that...

When I first put in my 2 DD's I accidentally wired them up with one out of phase...

OMG sounded horrible... hard to explain, sounded like the box was breaking apart.

Wouldnt recommend it...

You only get full cancellation using tones... You can get standing wave issues in ur car as well, but most people wouldnt notice them anyway

Peace

Tim

ok i had one 12" Type S sub running off half my 4 channel eclipse amp (160wRMS). I then purchased another sub exactly the same (same box as well) and an alpine monoblock giving each sub 190wRMS each.

soooo, would i of got the same results from just sticking with the one sub and feeding it 380wRMS with one amp?

P.S. i dont give a flying f#ck about having a "blingy" boot, i hardly ever open my boot anyway.

ok i had one 12" Type S sub running off half my 4 channel eclipse amp (160wRMS). I then purchased another sub exactly the same (same box as well) and an alpine monoblock giving each sub 190wRMS each.

soooo, would i of got the same results from just sticking with the one sub and feeding it 380wRMS with one amp?

P.S. i dont give a flying f#ck about having a "blingy" boot, i hardly ever open my boot anyway.


If its monoblock then it should only have one channel and if if it does and you run 2 subs then the ohms will go down normally increasing the power output (if it can hold stable)

this is how it was explained to me so i hope its right :)

iiiiin conclusion:


domt get a new sub lol lol

If its monoblock then it should only have one channel and if if it does and you run 2 subs then the ohms will go down normally increasing the power output (if it can hold stable)

this is how it was explained to me so i hope its right :)

yeh my alpine monoblock has about 200wRMs @ 4 ohms and 384wRMS @ 2 ohms (birth certificate). Its wired to run both my dual 2 ohm subs at 2 ohms.

So keeping the one sub and getting a monoblock would of been stupid cos then i would be only able to run it at 4ohms. What i was considering doing was keeping the one sub and buying a 2 channel amp good for about 400wRMS.

I simply thought double the surface area would mean more bass, but now not so sure....?

Yes more subs = more bass...

But meh... who needs more bass? I say get good midbass to keep up with ur subs...