[Mugen_Power]

Originally Posted by rsjaurr

He is our residant SPL expert here..

@ rsjaurr,

Wow..
How Do You Know ??

@ Technocrat,

You Will Need DB Meter To Measure Level.
If Possible Post Some Pics.

Cheers,
Mugen_Power.

[low_bass_makker]

Originally Posted by rsjaurr

ask LBM to courier his SPL meter for few days.He is our residant SPL expert here..

At last I am expert in something..........

Thank you Rsj....

[amit_sound]

ha ha ha, jus the kind of thread i was gonna start today...

I bought a new Nokia 3250, which has a application called "SounMeter" in it. Althought the application claims that it not ment for professional use because slight differences will occur if tested using a actual device..

As far as L_B_M's post no 6 of this thread goes. I tried and the results given by the application were very very similar.

Next, i took my car to a quite place to do a db test. I started playing the Glassy track by HardKaur.. I pupmed up the volume and even before the bass could start, the application started showing the reading of 114 db. The application does not read dbs above 114. So the it simple flashed ">114"..

Now i am guessing how much dbs does my system produce?

[low_bass_makker]

amit u have two 15 inch and power buy a good amp in your car they must be above 130 db easily.....

[amit_sound]

hmm...i read that as powered by ...right LBM ??? well yes even i thought so it should be over 130 db... waiting to chk it officially though...thnx

[Technocrat]

Originally Posted by low_bass_makker

from where did u made the ported box....which ports are used....any pics would be help full.....

It was a readymade Box with the installer, It is slightly inclined at I suppose at around 30-45 deg something like this, just that its placed horizontal than vertical(i.e. the sub is facing up & towards front) & the ports(2 ports) are not like those in pic but are next to the Sub but on the same plain slightly lower near the corners, each of around ~2.5-2 inch dia



Will try to take picture from my cell at lunch time & post

[low_bass_makker]

take the pic of the box when in the boot.....

[amit_sound]

Yup, i got two GT4-15 ,15" and a JBL 601.1 mono.. I guess bass should be between 130 -140 dbs

[navin]

Originally Posted by amit_sound

Yup, i got two GT4-15 ,15" and a JBL 601.1 mono.. I guess bass should be between 130 -140 dbs

Please wear ear plugs (they reduce SPL by as much as 25-30db) when testing your system.

[Technocrat]

Hi LBM

Here are the pics(clickable thumbnails) of my sub:



The Sub in Ported Box



Sub Below Tray with Speakers



Connector

Hope thuis helps, took the pics from my Nokia 6600 hence the quality

[low_bass_makker]

man this is no ported box but it looks like a ported box ...I would say close the holes but putting some thing on the top of it....then it will sound better....one more thing try facing the sub the boot door it will also help a lot....this is for the sounding...the max spl you must be achiving would be nearly 120-125 db....this is a estimate figure not a correct one....

[navin]

dont close the holes, stuff an old cotton sock in each hole. make it aperiodic.

[low_bass_makker]

Originally Posted by navin

dont close the holes, stuff an old cotton sock in each hole. make it aperiodic.

Ya agreed this can be done but try both the option keep which sounds you most....

[Technocrat]

Thanks guys

Btw why do you say its not ported? I mean how do you define ports & why do these holes dont qualify as one ?

Hmm will change the facing and also put my old socks to use

Btw normally i listen to 50-60% of max volume level(The max is 62 & when I am blasting its at 35 or in some case 40, normallly between 25-30) So I belive that should approx be within 90db what say ?

[Bass&Trouble]

Originally Posted by Technocrat

Thanks guys

Btw why do you say its not ported? I mean how do you define ports & why do these holes dont qualify as one ?

Hmm will change the facing and also put my old socks to use

Btw normally i listen to 50-60% of max volume level(The max is 62 & when I am blasting its at 35 or in some case 40, normallly between 25-30) So I belive that should approx be within 90db what say ?

Let's start with, a 12" sub needs a port diameter of atleast 3-4" to atleast function as a port. Otherwise, the port contribution is too little. Secondly, it seems very unlikely, that the installer would have designed the box and the ports based on the sub's specs. Looks like a one-size-fits-all kinda box. And I don't know for sure, but does Sony even provide the T-S parameters with their basic subs? Maybe they do, just curious.