SI Mag 15s ported - #'s

[Buffalohed 10+ year member]

I got my vehicle metered at my first competition yesterday. It was a lot of fun for about the first 3 hours, then started to drag onnnn and onnnn, wish there had been more competitors. Noone had any subs that I wanted to hear, except for htownplaya from here with his Flatline. Everyone had MTX and RF and Memphis subs, so boring.

Anyway, the setup is 2 SI Mag 15s in 7 cubes @ 30hz with 100" port in my 96 camry trunk on a Sundown SAZ-1500D at .5ohms.

I hit a 142 at 33hz which I thought was pretty impressive, and peaked at 146.6 at 42hz. I took 2nd place in Stock 1 class, the next highest after me was a 143 something. I beat some guy with 4 ported Alphasonik 12s and 2 1000Ds, destroyed 2 W7s with 2 1000.1s, beat 2 MTX 15s ported on 3000 watts. In fact, me and the 1st place in my class beat every car in the higher stock classes.

The best thing though is the Mags sound awesome doing it. After metering I played some random tracks from my test cd for some people and they were amazed at the subs accuracy, none of them had heard anything like it.

I'm almost positive my car has a 148 in it right now with just a little tweaking. The 146 was with all doors/windows closed and in the kick, HU volume at 28. After that run I boosted the gains about 12-15% and tested for clipping at 29 volume and it was good to go. Also the box isn't sealed up from the trunk yet. If I throw some pillows in there to ghetto seal it, and run through with the gains set higher and open the doors I should hit a 147-8. Will have to wait for the next comp to do that I guess, if I can afford it.

The runs were ****ing expensive so I only did the two 30 second intervals... one for the sweep and one for tones. This was a USACi meet.

Bottom line - 150 in a trunk is not only possible, it isn't really that difficult at all. I'm not running an SPL rig, not even close really with the 30hz tune, and I could very likely hit a 150 by strapping a 2nd Sundown to make about 3500 watts.

Pics of the install here on pages 1, 4, completed install on 6:

http://www.caraudio.com/forum/showthread.php?t=229916

Click to read more...

 

[bigbangtheory 5,000+ posts]

Nice job! Some good numbers you are pulling there.

I will say I did a 141.1 with two type R's off 1000rms in a sealed box. Hell I do a 138.7 off on Q off same amp.

Still nice scores.

Enjoy it.

 

[iagrdshaka 5,000+ posts]

oops thought the scores were dB drag style....nevermind

 

[IgnoreMe 5,000+ posts]

nice. get another sundown on those mags. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

edit: and low tuned daily boxes mmmmmmm

 

[Hundreth 10+ year member]

You do realize that 150 is TWICE as loud as 147 right?

Nice job though, i gotta port my Mag 12 so I can actually see what its capable of.

 

[Andrew12 10+ year member]

My mag 15" on a 1100 watt memphis amp did a 142.2 on the TL in a trunk of a 99' Honda civic. Lost alot in the rattle... it was before I got my trunk dynamated. It's going to be hard for me to use anything other then the Mag on down the road with future systems....

 

[IgnoreMe 5,000+ posts]

You do realize that 150 is TWICE as loud as 147 right?
Nice job though, i gotta port my Mag 12 so I can actually see what its capable of.

to me its not twice as loud unless it sounds twice as loud. just cause science says 3db's is twice as loud...doesnt mean it sounds like it to the ear.

 

[Hundreth 10+ year member]

to me its not twice as loud unless it sounds twice as loud. just cause science says 3db's is twice as loud...doesnt mean it sounds like it to the ear.

Don't think I ever claimed that it would sound twice as loud to the ear. I was talking about his claim that its probably easy to go from a 146.something to a 150. It just so happens that the meter is bound by science. Maybe it is easy for him to get to a 150, I dunno... I was just saying that its a big increase.

 

[audioholic 5,000+ posts]

Nice job Buffalo and Magick Man. Its not often Im jealous of someone else's system around here. I have to admit, Im semi-jealous.

lol

 

[guting 10+ year member]

what year is your car?

 

[Buffalohed 10+ year member]

Don't think I ever claimed that it would sound twice as loud to the ear. I was talking about his claim that its probably easy to go from a 146.something to a 150. It just so happens that the meter is bound by science. Maybe it is easy for him to get to a 150, I dunno... I was just saying that its a big increase.

It should be easy, and I explained why. I should have a 147-8 with just sealing the trunk and knowing the upper limit for gains, not to mention "outlaw" metering styles - the 146 was sealed up. And when I said 150, I mentioned another Sundown, thereby doubling power, which is often said around here to equal a 3db increase.

Nice job Buffalo and Magick Man. Its not often Im jealous of someone else's system around here. I have to admit, Im semi-jealous.
lol

Thanks //content.invisioncic.com/y282845/emoticons/blush.gif.99bc659ee2012b7d826165e26fb5eebe.gif Though it's not perfect. One of the braces has come loose and I need to get a sub out and probably improve the bracing in general to stop the roof of the box from flexing.

what year is your car?

'96. It's white with all sorts of stains and ugly as hell //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[guting 10+ year member]

pics?

 

[Buffalohed 10+ year member]

Lots of pics here. Pages 1, 4, final install on 6.

http://www.caraudio.com/forum/showthread.php?t=229916

 

[Blunt 10+ year member]

It should be easy, and I explained why. I should have a 147-8 with just sealing the trunk and knowing the upper limit for gains, not to mention "outlaw" metering styles - the 146 was sealed up. And when I said 150, I mentioned another Sundown, thereby doubling power, which is often said around here to equal a 3db increase.

Thanks //content.invisioncic.com/y282845/emoticons/blush.gif.99bc659ee2012b7d826165e26fb5eebe.gif Though it's not perfect. One of the braces has come loose and I need to get a sub out and probably improve the bracing in general to stop the roof of the box from flexing.

'96. It's white with all sorts of stains and ugly as hell //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

show me a 3db increase from doubleing power in your car and i'll be very surprised. thsoe are decent numbers but the 50 isn't as easy as your thinking its gonna be. but good luck.

 

[Buffalohed 10+ year member]

show me a 3db increase from doubleing power in your car and i'll be very surprised. thsoe are decent numbers but the 50 isn't as easy as your thinking its gonna be. but good luck.

I can't show you it because I'm not going to double the power. It is quite loud enough for me as it is, the entire ****ing interior acts like a diaphragm at that volume level, and this isn't meant to be an SPL rig. I have no experience with this stuff so I can only say what I've heard, and I've heard many times in many places that doubling the power is roughly equivalent to a 3db increase. I'm not trying to hit a 150, just saying it should be possible. If I really wanted to be an SPL monster I'd sell the Mags, put in some DDs, reach in and break off the port at the turn to make it 6" shorter, scrap the comp upgrades I was planning and buy me 3 more Sundowns //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif