hey hey i finally went to a usaci competition. i was really nervous. and since this was my first time i did not know my load Hz. so i hit a 149.9 outlaw on the floor between the dudes legs. i think that i would hit harder if it was on the dash.

Modified by autoprelude at 10:23 PM 9/1/2003


Modified by autoprelude at 11:08 PM 9/1/2003


Modified by autoprelude at 11:10 PM 9/1/2003

 

wellll.. i'm assuming this is a sound-off. i honestly dont know what SPL stands for..but this probably isnt the best place to post a q' like this. The audio/security section may yield more results.

as for your picture question. when youre writing a reply/new thread, click the "Image" button which should give you [ img] [ /img] (without the spaces), then you put yoru url (without spaces) in between the [ img] and [ /img] brackets.

so this: [ img] http:// images.honda-tech.com/set1/htflag1.jpg [ /img] (*remove all spaces*)

should come out like this:

 

it wont be as loud on the dash. what is your box tuned to? what test tone did you play?

spl = sound pressure level, measured in decibels. spl is an algorithim, so every 3 db's is twice the acoustical output. a rock concert is 125 db's, so 149 is ouch.

 

i could have sworn i saw that prelude up at usac'i last fall/winter for nationals in kansas city. nice car btw.

 

I like what you've done with the box, must weigh alot too. Isnt outlaw your allowed to put the mic anywhere you want? But if it was 149 at the front seat thats dam loud, for me after 145 it just gets too much and I like alot of bass.

 

kick his butt out of the car when you're measuring SPL. The more space the sound waves have to develop = the more pressure that can be built up. So when some event staff guy is in the car with ya......your reading might be slightly haltered.

nice set up with the amps....and the box design is interesting.

 

jeez man.. that setup is awesome.
spl: learn something new every day at h/tech

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00prelude-type-s &raquo;</TD></TR><TR><TD CLASS="quote">kick his butt out of the car when you're measuring SPL. The more space the sound waves have to develop = the more pressure that can be built up. So when some event staff guy is in the car with ya......your reading might be slightly haltered.

nice set up with the amps....and the box design is interesting. </TD></TR></TABLE>

no you got it all wrong, the more cubic inches taken up inside the cabin the better, do a search or something.

 

like I said........the more space the waves have to develop the better.......if some guy is sitting his butt in your passenger seat. he is taking up some of the volume of the interior of the car, yeilding less space for the waves to develop.

 

yeah, but if there is less air in the cabin for the speakers to pressurize than the rating is going to be higher!

 

the box is 7.5 cubic feet how we managed to squeeze that out of a lude who knows. THe box's carpet is being ripped out today and i am going to prepare for the fiberglass. i have a good amount of paint left over and plan on painting the box the box the same color as the car. it should turn out niclely

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00prelude-type-s &raquo;</TD></TR><TR><TD CLASS="quote">like I said........the more space the waves have to develop the better.......if some guy is sitting his butt in your passenger seat. he is taking up some of the volume of the interior of the car, yeilding less space for the waves to develop.</TD></TR></TABLE>

ya, and like I said, you just came up with that outta yer ***. The more cubic inches taken up in the cabin = more spl.

 

you need to upgrade the memphis to JL's

 

sorry for the ot, but whats that color? i like it

 

btw, it seems someone has finally found a good use for the prelude's "back seat"

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94prelude &raquo;</TD></TR><TR><TD CLASS="quote">sorry for the ot, but whats that color? i like it </TD></TR></TABLE>

i second that!!!

 

ladies and gentlemen the color is Long beach blue. the same color as a brand new NSX. The color came from an edition of HT and when i got hit i used the money to get the car painted. i loved that color on the NSX and thought it would look good and stand out. the picture does not do it justice at all the paint is not Honda so i don't know how much i varies but the color is a real eyecatcher, even at night.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PetroGuyX &raquo;</TD></TR><TR><TD CLASS="quote">you need to upgrade the memphis to JL's </TD></TR></TABLE>
i love the cleanliness of Memphis. No offense but i don't like the quality and yes i know of the w7. i would rather have a Mojo anyday and trust me i have heard both and memphis sounds better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TraKtioN &raquo;</TD></TR><TR><TD CLASS="quote">

ya, and like I said, you just came up with that outta yer ***. The more cubic inches taken up in the cabin = more spl.</TD></TR></TABLE>

cubic inches........did you know that volume is a cubic measurement?
a suburban with no seats and the same system as his prelude........
the suburban will have a greater SPL due to the lower frequency.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00prelude-type-s &raquo;</TD></TR><TR><TD CLASS="quote">

cubic inches........did you know that volume is a cubic measurement?
a suburban with no seats and the same system as his prelude........
the suburban will have a greater SPL due to the lower frequency. </TD></TR></TABLE>

ya thats what I just said cubic inches, whos talking about frequency?? were talkinga bout SPL

 

that is not necesarrily (sorry) true the less space there is in a car the higher the rating. that is why when you see the vans they get the box as close to the windshield and dash as possible. this is because the less space to pressurize the better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by autoprelude &raquo;</TD></TR><TR><TD CLASS="quote">
i have heard both and memphis sounds better. </TD></TR></TABLE>
adjust yo ears nunga

 

I agree, the JL's will kill the Memphis woofers. Although, the W7 doesnt't please me like I was told it should. 600w of XTANT power on a 10W7 just did not do it for me.

 

thats incorrect. spl is a measure of cabin pressure, the pressure in the car. When you take the seats out of the suburban you increase the amount of air the subs have to pressurize in the car. To maximize spl, you must find the resonant frequency of your vehicle, tune your box to that frequency, play a test tone using that frequency, and minimize the amount of air in the car. thats why a crx with 1 12" sub @1000watts will have a higher spl then a suburban with 1 12" sub@1000 watts, in the same size enclosure. The resonant frequency will be lower for the suburban, but that means nothing because subs are inefficient at too low of a frequency and each box is tuned to cater to that vehicle anyways.

I hit 140 on the dash legal with 600 watts and 1 12 in da back of an old olds i had, and that box was tuned for SQ, not spl

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by machinehead &raquo;</TD></TR><TR><TD CLASS="quote">thats incorrect. spl is a measure of cabin pressure, the pressure in the car. When you take the seats out of the suburban you increase the amount of air the subs have to pressurize in the car. To maximize spl, you must find the resonant frequency of your vehicle, tune your box to that frequency, play a test tone using that frequency, and minimize the amount of air in the car. thats why a crx with 1 12" sub @1000watts will have a higher spl then a suburban with 1 12" sub@1000 watts, in the same size enclosure. The resonant frequency will be lower for the suburban, but that means nothing because subs are inefficient at too low of a frequency and each box is tuned to cater to that vehicle anyways.

I hit 140 on the dash legal with 600 watts and 1 12 in da back of an old olds i had, and that box was tuned for SQ, not spl </TD></TR></TABLE>

This is true, I hit 140 with 200 watts rms not max with 2 10" crappy kenwoods in a box I built. Mic was at the dash.

 

we all know ORION HCCA's will decimate all......... yeah so what they're illegal and under-rated on purpose......... I worked in a car audio store for 3 years and built plenty of SPL competion cars, including the orion van, there are A TON of factors which contribute to SPL levels being measured, ask any of the high rollers in the game now like ohmagates (or however you spell that) the power and the loudness is pretty much maxed out with everyone....... its all about physics now- kinda like a nascar race