SPL, how to get louder?

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brandon8686

Member - Posts: 2

Joined: August 24, 2004

Location: Canada

Posted: August 24, 2004 at 11:09 PM / IP Logged

Hello everybody, I want everybodys input on how to get louder than i already am I have:

2 S12L7 Kicker subs.

1 bp1200.1 JBL amplifier

ported box 5.25 cubic feet.. fiberglass

clarion dxz853 deck..

and a phoenix gold bass cube

Im driving a nissan 240sx coupe and the subs are in the trunk.. its sorta customized to be more hatchback like for better airflow into the cab.

What can i do to improve my spl? im probably gonna soundproof everything and upgrade my deck to an excelon eclipse or alpine but other than those improvements im stumped on what to do to gain a few db.. any ideas???

I got in sensored recently with a termlab and i hit 150.2 db

xtreamcc

Silver - Posts: 467

Joined: March 24, 2004

Location: United States

Posted: August 25, 2004 at 12:20 AM / IP Logged

you hit 150 and ur concerned about not enough SPL? You trying to go deft or what dude? Anyway, with ur current setup there's not much you could do except maybe get a second amp and push both subs to their max, but that would probably destroy them in that ported box..... but you'd be louder SPL, how to get louder? - Last Post -- posted image.

SPL, how to get louder? - Last Post -- posted image.

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gibo

Member - Posts: 3

Joined: August 26, 2004

Location: United States

Posted: August 28, 2004 at 12:16 AM / IP Logged

Well you could add one more JBL bl 1200 and run one to each sub that would get you up to 153 db, double the power to go up 3 db, then you need more voltage and amperage to power the amps, you might want to try one of these if you don't already have one: http://www.batcap.net/index1.htm

markcars

Silver - Posts: 662

Joined: December 11, 2002

Location: New York, United States

Posted: August 29, 2004 at 7:17 AM / IP Logged

You have 150.2 db and thats not enough for you? I assume you are not continuously listening to those volumes are you? Because at those levels, you can easily damage your ear drums. Please don't damage your hearing.

Just out of curiosity, what did you use to measure the db level on your speakers?

jeffchilcott

Platinum - Posts: 2,483

Joined: April 11, 2002

Location: United States

Posted: August 29, 2004 at 2:01 PM / IP Logged

150.2 on the term lab and you want more, what class are you running in?

2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR

2007 USACI World Champion

2007 World Record

2006 USACI Finals 2nd Place

Steven Kephart

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Joined: November 06, 2003

Location: Oregon, United States

Posted: August 29, 2004 at 5:37 PM / IP Logged

Where was the mic placed when you hit that score?

With SPL, there is no replacement for displacement. So if you can get more radiating surface, or further movement (larger enclosure/more power) at the frequency you are playing, then you will be louder. Other ways of doing it is making sure your enclosure walls are perfectly rigid. You will lose SPL if the box flexes at all. You should also do what you can to make the vehicle rigid (within the rules of the organization you are entering). That will reduce losses as well.

Steven Kephart

Adire Audio

mconway0000

Member - Posts: 6

Joined: August 29, 2004

Location: United States

Posted: August 31, 2004 at 2:20 AM / IP Logged

dynamat or tsunami silencer or anything else of the like should help a bit, maybe double layer it

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SPL, how to get louder?

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