Gaining Decibels?

[stl_314 10+ year member]

There is a couple people from st louis that can vouch for that...it was 2 sundown 3ks and walled off but I think it was tuned in the mid 40s

 

[NutHugger 10+ year member]

Well did you not state "More cone area does not = more spl"? Given all other system components are equal, with just a change in size of woofer......you will gain..... it is simple physics.

Not necessarily. Not in all cases. You're just plain wrong. If you went from 2 18's in your suv to say 20 18's you're not going to gain. More IS NOT always louder. It's not just factual. What I've stated so far is absolutely true. if you're arguing it you've never broken a 150.

 

[NutHugger 10+ year member]

I think the problem is you're not able to discern the difference between theoretical and reality.

 

[keep_hope_alive Premium Member]

i agree that simply adding cone area does not mean you will always gain in measured decibels - once you hit the threshold of what the vehicle can support. the system is dynamic - and non-linear at that point. many other variables come into play. besides, most people use shared airspace to save hassle/space which means excursion is reduced. so while you have more surface area, you have less excursion - could mean no gain or a reduction. above the threshold the subs fight themselves (as was already mentioned).

classical equations have a range of where they are applicable, and roll off outside of that range.

 

[keep_hope_alive Premium Member]

Competitor Stats: Nathan Munson

Competitor Stats: Nathan Munson

I'll never forget the first time i read about Nate Munson breaking 170dB with a single 10" sub. That is a man who can understand and apply physics. And that was almost 10 years ago!

 

[hispls 5,000+ posts]

Anybody else remember the days when all the top SPL scores were a dozen or more woofers? Alma Gates with 64 12's? I've seen enough of that style build to believe that if you stick enough best buy woofers in a van it'll get loud. After a point it becomes much more complicated, but I believe mid to high 50's is possible with almost anything in sufficient quantity.

 

[winkychevelle 10+ year member]

Anybody else remember the days when all the top SPL scores were a dozen or more woofers? Alma Gates with 64 12's? I've seen enough of that style build to believe that if you stick enough best buy woofers in a van it'll get loud. After a point it becomes much more complicated, but I believe mid to high 50's is possible with almost anything in sufficient quantity.

i have to agree with a good design good power and a well sealed vehicle multi sub systems always get loud.

but i also believe it can only go up to a point at which the design fails and youve topped out

but with anything larger than 2 18s a person should be in the 155 range hitting anything higher is stupid hard and understandable to not reach but with that much cone area you have to break a 150

 

[mlstrass 5,000+ posts]

I was just at a local car audio show. Frost off in Madison, WI.
A guy showed up from IOWA. He had 6 18" SMDs. He did a 159. He had 3 DC 9ks.

He used to have a MTX Jackhammer 22. And did a 156.1

Is it that hard to gain decibels?

what show were you at????? 6 18 SMD's and 3 DC9k's supposedly wired to .35ohm each, also had 4 DC alts. Serious set up for sure.

Did a 53.4 bass racing and might have broken a 55 on the dash with door open, don't remember exact score, but it wasn't loud for what he has. Peaked around 42-43Hz according to his Real SPL run.

He said he does a 57+ in the kick, but this wasn't a USACI show...

 

[mlstrass 5,000+ posts]

Not necessarily. Not in all cases. You're just plain wrong. If you went from 2 18's in your suv to say 20 18's you're not going to gain. More IS NOT always louder. It's not just factual. What I've stated so far is absolutely true. if you're arguing it you've never broken a 150.

Why are you going to such extremes with your examples? Makes your arguement less valid IMO.

So are you saying that doubling cone area, assuming you have room to build a proper enclosure won't be louder 99% of the time?

I've broken a 50 once or twice...

 

[subzero 5,000+ posts]

i was just at a local car audio show. Frost off in madison, wi.
A guy showed up from iowa. He had 6 18" smds. He did a 159. He had 3 dc 9ks.

He used to have a mtx jackhammer 22. And did a 156.1

is it that hard to gain decibels?

yes

 

[NutHugger 10+ year member]

Why are you going to such extremes with your examples? Makes your arguement less valid IMO.
So are you saying that doubling cone area, assuming you have room to build a proper enclosure won't be louder 99% of the time?

I've broken a 50 once or twice...

No and No. How can you miss the point of my examples? These guys have said that adding cone area and power is what is required to create spl and threw out enclosure design altogether. So I have used absurdity to demonstrate their absurd opinions. I even keep saying "by your logic if some is good then more is better right?". So how could you miss the point? I suppose we should talk about your lack of comprehension, or your self proclaimed credibility. I've broken 150 a few times too. Before just now had I said that? Was it necessary to try to boost my e-peen? Nah. It wasn't. I'm just trying to straighten out a few misguided people in here. I'm obviously correct so I'm not really sure why you or anyone else who says they know what they are talking about would want to argue.

 

[Why So Cereal? 5,000+ posts]

I'm obviously correct so I'm not really sure why you or anyone else who says they know what they are talking about would want to argue.

How's the weather up there?

 

[NutHugger 10+ year member]

How's the weather up there?

Really? People want to take shots because I know I'm right about something?... especially something as known as just adding a bunch of woofers is not going to help with SPL. You act like people should just bumble through life never sure of anything.

 

[jockhater2 10+ year member]

ok. So I got some info for you guys.

His vehicle is a tahoe. It looks like a daily ground pounder. He was a really cool guy and very nice. It was not a wall. And the boxs port was tuned to 34hertz. and he said there wasnt enough port for the 6 subs.

Also. The reason at the show he only hit 157 is because 1 or 2 of the DC 9ks went into project. I didn't catch the full announcement on that. Just that he pulled off to the size to fix his amp.

Tahoe - YouTube[/url]

 

[chillin 10+ year member]

neither of those guys could design a box if their life depended it. There are guys doing 155's in the 30hz region with 2 15's... If you can't do high 150's with 6 18's your an idiot.

No and No. How can you miss the point of my examples? These guys have said that adding cone area and power is what is required to create spl and threw out enclosure design altogether. So I have used absurdity to demonstrate their absurd opinions. I even keep saying "by your logic if some is good then more is better right?". So how could you miss the point? I suppose we should talk about your lack of comprehension, or your self proclaimed credibility. I've broken 150 a few times too. Before just now had I said that? Was it necessary to try to boost my e-peen? Nah. It wasn't. I'm just trying to straighten out a few misguided people in here. I'm obviously correct so I'm not really sure why you or anyone else who says they know what they are talking about would want to argue.

By saying neither of those guys could design a box, I would think that implies adding more woofers is based on knowing how to build a proper enclosure. I wouldn't say he threw out the idea of enclosure design.