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» Termpro Audio Forum » Installer's Corner » SPL » 4 18's vs. 8 12's Pros and Cons please

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Author Topic: 4 18's vs. 8 12's Pros and Cons please
Gavin
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I was thinking since I'm rebuilding my van...about changing from 4 18's to 8 12's, I know the pro would be more cone space but what would the cons be? [Confused]

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Master Yoda
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Cost? it will come down to cost. which setup will use more amps? and need more batteries. I would try to look at the big picture there is more to the system then just adding subs look at how each setup will affect the current setup that you have and where it can be improved on. and decide which one will have the the direction that you want to go with your system

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Gavin
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quote:
Originally posted by Master Yoda:
Cost? it will come down to cost. which setup will use more amps? and need more batteries. I would try to look at the big picture there is more to the system then just adding subs look at how each setup will affect the current setup that you have and where it can be improved on. and decide which one will have the the direction that you want to go with your system

well, first this is a drag only van, and I already have enough batts and amps for either setup. right now I'm using 4 18's, I was just wondering if more cone area would help my score a little bit. As for cost, that is not a problem.

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bdunn23
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it is hard to say beings it will change they way your box is tuned
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dB Don
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First, eight 12's is not more cone than four 18's. Four 18's is approx ten 12's(Give of take some square inches depending on the manufacture).

The gain will come from the power you will be able to apply to the subwoofers in a properly set-up enclosure.

So the cost is really going to go up if your willing to go that extra distance with batteries and amplifiers/wires.

Have you thought about seven to nine 15" on flat wall or a 4th order?

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RFKANGOO
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why not get it loud with the stuff you already have
if you can't do 160 with this equipment you wont do it with other stuff
that is my opinion

I know the number is there but you have to work for it

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Gavin
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quote:
Originally posted by RFKANGOO:
why not get it loud with the stuff you already have
if you can't do 160 with this equipment you wont do it with other stuff
that is my opinion

I know the number is there but you have to work for it

I understand totally what your saying, but if you keep hitting a dead end, what are you suppose to do? I've changed so many things and still came out with the same problem. Right now I do have a few more things I'm going to try that was suggested to me via friends and team mates but now I'm just at that point of "Praying for the best and getting ready for the worst". [Freak]

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dB Don
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Has anyone ever given you specific instructions on the enclosure?

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SLAB
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stick with what you have man.
be patient.
getting loud takes time. (i hope i can be loud some day)
there are many variables with 4 subs, when you go to 8 subs there will be many more variables and youll be thousands of dollars poorer

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Gavin
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You guys are right. I should stick with what I have and keep working it. someday I'll join the club. Thanks for keep me grounded!

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SLAB
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thank you for thinking things through before cutting up your baffle

youll get loud man. what do you need like 4db to catch the loudest in japan?

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kraven moorehead
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Gavin you know more is not always better.....Maybe you should go to 2-18's. I know that I go against alot of setups with 4 subs with my two and I wind up being louder because of less standing wave....Just a thought. I did my first 160 with 2 15's and four amps. Maybe its time to consider different equipment?

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Gavin
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quote:
Originally posted by SLAB:
thank you for thinking things through before cutting up your baffle

youll get loud man. what do you need like 4db to catch the loudest in japan?

yep 4db's would make me #1 and 7db'S would put me at least in AMERICAN ranking [Big Grin]

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Gavin
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quote:
Originally posted by kraven moorehead:
Gavin you know more is not always better.....Maybe you should go to 2-18's. I know that I go against alot of setups with 4 subs with my two and I wind up being louder because of less standing wave....Just a thought. I did my first 160 with 2 15's and four amps. Maybe its time to consider different equipment?

KM: Anything is possible, maybe 2 subs would be the way but, I have to exhaust all my choices before rebuilding down to 2 subs, and as for changing equipment, out of the question. I stick with the people how have been with me from the start. I know for a fact the stuff I have has made records, so I don't doubt for a moment it's my equipment, I do know its my skills as a builder plus not having someone here physicially who know's what they are doing or to spot my mistakes or to advise me on how to make things easier only makes things harder [Frown] but, I won't quit, sometimes you just need your friends to help guide you when you get off path and I think onece again, that's what happened. [Wink] This year, I was given some more sensable and simple advice to try. Maybe these small changes will get me in the club. [Laugh]

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Chad G.
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quote:
Originally posted by kraven moorehead:
Gavin you know more is not always better.....Maybe you should go to 2-18's. I know that I go against alot of setups with 4 subs with my two and I wind up being louder because of less standing wave....Just a thought. I did my first 160 with 2 15's and four amps. Maybe its time to consider different equipment?

Kraven is right! Do 2-18's and have less problems with time alignment. And have a better chance at being louder. [Wink]

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TeamSubGoPoof
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Gavin...pay for my flight to Japan and I'm down for a weeks vacation [Big Grin]

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Sinister-David
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Gavin just never give up bro and try those couple things me and u talked about and see where that gets u i would stay with the 4 18's and just learn on the way to the TOP

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D-Bass
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if it were easy, they'd call it women's basketball
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Gavin
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quote:
Originally posted by D-Bass:
if it were easy, they'd call it women's basketball

LoL, be careful, don't want to SPL ladies to get upset.. "But I do understand"

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kraven moorehead
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Gavin wasnt suggestin you jump ship, I respect loyalty to a product and team. Stand tall brother and best of luck remember Rome wasnt built in a day, just as spl cars arent. Can you post some pics of your enclosure? I havent seen it and I am sure alot of others havent either, you may get some suggestions that will help.

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Sinister-David
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there is a whole build log on it here on the furom

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Gavin
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quote:
Originally posted by Sinister-David:
there is a whole build log on it here on the furom

sure is, I was trying to find it to link it to him [Big Grin]

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Wagonized
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i think you would probably be louder eventually with 8 12s due to the added motor strength you have. however the tuning and all those recones involved in the tuning aspect of things is whats really going to kill you.

But in the meantime id stick with your 4 18s until you reach your goal and then after that you can revamp and go from there.

Why not stick with the same cone area and just change box designs? Try a bandpass for instance

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PeteS
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I know 8 12's in a 4th order is more then capable of 160+ with out high end gear in a Astro van [Wink]

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TeamSubGoPoof
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quote:
Originally posted by PeteS:
I know 8 12's in a 4th order is more then capable of 160+ with out high end gear in a Astro van [Wink]

You also have an extreme style interior

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