ChrisB

iTrader: (4)

Ok here we go.. [img]smile.gif[/img]

*In Theory*
Double Cone area = 3db gain
Double Amplifier power = 3db gain

When you split the power between 2 subs that doesn't not give you a 3 db loss..


*From Experience*
It's not often you will actually see the 3db gain with those, I have only have 1 setup which did, I actually gained 6 db by adding another sub as well adding another amp.

Starterwiz

Umm you're confusing me.

Halving the power to a speaker results in a 3 dB loss. doubling the cone area gives a 3 dB gain.
Net result should be 0 gain, however the coupling effect from two drivers on one baffle will give a gain, depending on the distance between the subs.

This is the SQ forum, right? I am assuming that "better" refers to SQ, not SPL.

The great sounding SQ cars? Give us some examples. I'd bet that the overall cost of those cars was rather high, especially in the time spent on trial and error, tweaking, modifying, and squeezing the very best out of the products used. That's irrelavent to the topic.

TANSTAAFL : There ain't no such thing as a free lunch!

Sorry...haven't quite figured how to quote yet.

[ February 19, 2005, 09:10 AM: Message edited by: Car Trek ]

Bronco 2

ok here is my take on this


2 subs same amp = same volume less stress on the sub more air space required less travel on the sub so less posibility for distortion highr over all power handling easier to make symetrical install

1 sub same amp = same volume less air space shorter life span

provided the they were the same subs
and the law of phyisics were absolutet
I would take 2 subs anyday

I have almost always run my own subs in pairs
but I have done install in cars where 1 10 was more than enough 95 fire bird comes to mind with a single jbl gto 10 stuffed into the side of truck space next to the viod for the t tops or the single 10 in a 69 bettle man did that hit hard
and clean

so realy it is your over all seup car box and sub and amp that you need to look at as a whole and decide what works for that application but it is easy enough to add a second sub if one isn't enough

JohnVroom

That is the origional question, sure 2 subs will give more cone area and therefore more volume but is that the question? Is volume the only consideration? How about the quality of the bass, how about the ability to go to 20 Hz with authority. Will 2 subs give better SQ than one?

My answer is a resounding maybe!

Starterwiz

Maybe?....Why?
Yes , No, Maybe....I have all the answers too!

zzzzzzz

iTrader: (5)

ok lets see two 27cv or one 27kx with an audison LRX 1x400 say
i would have to go with the 27kx becouse if i'm going to pay the same $ for the sub/s i will get the better sub that's it ONE SUB NOT TWO

JohnVroom

2 subs
Advantages: more SPL, depending on the box more low frequency extension, more authority in the sub-bass, as Jamie said “it looks cooler”, and as Haunz said “if done correctly better sound quality if the single driver was being driven past its linear range…”, 2 smaller subs may be better than a large one in many SQ and SPL applications

Disadvantages: more opportunities for screw ups (not a good reason but it should be acknowledged, there may be quite a bit more effort), if placed in parallel on one amp the reduced impedance could affect the amplifiers ability to control cone movement (I am skeptical on this), there is an opportunity for the two woofers to sonically interact and there could be some cancellation at some frequencies, more box space will be required, cost will go up, you may overpower the front stage, even more excitation of the 60Hz ‘hot band’ (at least that is my cars hot freq)

I was trying to instigate thought, I certainly dont have all the answers

Starterwiz

Had a chance to try that Clarion carbon fibre 12 the other day. Was in a sealed box. I dropped a 10W3v2D2 in the trunk in a 1.1 ft ported box....It went louder, lower and sounded better.
Now I suppose adding another 12, and loading the amp down, would produce the same increase in volume, But for another $145, plus another box $60, and possibly another amp, install, wire, load on battery etc....would it have any better SQ? I think it would be the same sound...just more of it.

MTA

iTrader: (1)

this for some reason doesn't sound like an SQ question [img]smile.gif[/img]
some good arguments and lots of useless ones or repeated ones...no need to fight here...yes there are MANY MANY variables... too many to say what will be better for the application...not refering to any brands amounts of power or even types of boxes...just the fact of doubling the cone area and making the box twice as large will sound totally different as you now have changed your compartment size by installing a larger enclosure into it... but yes theory is theory and the only way to find out for sure is to try it... I have had 16 - 12" subs in my vehicle and I loved it( you try to phase all of them and minimize cone distortion and all the other crap that happens)... but I have also had a single woofer that sounded and played just as impressively... it really does come down to the dollar value... IMO and only my opinion..I would stay one better sub and an amp that will match the power rating and impedance of that sub ... including a well built/tuned enclosure for it... btw it takes 4x the power to make the cone move 2x as much ... most likely you will be louder with 2 woofers with X/2 amount of power per sub rather than 1 with X amount of power to it..the most I have gained by doubling woofers was 2.5db without doubling power...and also gained another 2.5db by adding 2x the power...but that was in my car...
...but...but...but...exactly my point...try it [img]smile.gif[/img]

oh yeah...and most of it is preference and bragging... I got 2 and you only have one

[ February 21, 2005, 08:52 AM: Message edited by: MTA ]

ChrisB

iTrader: (4)

I'd rather brag by saying you have 2, i only have 1.. and im louder than you (im sure you'll agree peter! [img]tongue.gif[/img] )