Truck System Pics

[Lakota 5,000+ posts]

lower frequencies sound louder to the ear

The human ear tends to be more sensitive to high frequencies. I'd rather my sub play at 140 db's than my frontstage play 140 db's.

 

[hoss 5,000+ posts]

? but pressure is pressure right?

yes, pressure is pressure. but pressure is not intensity. two systems could be capable of creating the same sound pressure level, but have different percieved intensities. it also depends on the waves inside the vehicle, how they move around the vehicle, how they interact with each other, and where inside the vehicle they peak. like its been said before, dedicated SPL vehicles can actually be designed to pressurize specific parts of the cab. my truck on the other hand, does not. it was not built for SPL, was just built to be a loud daily system. it doesent peak in any particular place, so it can seem louder than a vehicle which might peak in a different location.

Dosen't it also depend on the freq? Would'nt the pressure be different at 150db at 65hz, then 150db at 30hz? Just an uneducated guess.

yes, and no at the same time. some mics measure pressure by measuring velocity, others measure by measuring actual pressure. so the percieved difference could be due to frequency, but this is not the case. this could possibly account for a tenth of a Db, but my guess is that its not likely.

if so than the guy that dos 155+ would feel just as loud as hoss at ?HZ but he dos int

one thing that makes my install different from an SPL install also, is that mine is equally as loud across the entire sub-bass spectrum. anywhere from the infrasonics, to the xover point, i think i am within 2db across the entire 80hz range(or the part of the range that the meter can detect anyways). so my box doesent have a peak like an SPL install will, therefore, mine will more likely be percieved to be louder despite the freq.

it should also be noted that "feeling" louder is a highly subjective form of measurement. but if anyone wants to come sit in it and compare it to any other system they are definitly welcome to //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[corto 10+ year member]

opps jizzemd this thread is sexy

 

[jeremiah 10+ year member]

yes, pressure is pressure. but pressure is not intensity. two systems could be capable of creating the same sound pressure level, but have different percieved intensities. it also depends on the waves inside the vehicle, how they move around the vehicle, how they interact with each other, and where inside the vehicle they peak. like its been said before, dedicated SPL vehicles can actually be designed to pressurize specific parts of the cab. my truck on the other hand, does not. it was not built for SPL, was just built to be a loud daily system. it doesent peak in any particular place, so it can seem louder than a vehicle which might peak in a different location.
yes, and no at the same time. some mics measure pressure by measuring velocity, others measure by measuring actual pressure. so the percieved difference could be due to frequency, but this is not the case. this could possibly account for a tenth of a Db, but my guess is that its not likely.

one thing that makes my install different from an SPL install also, is that mine is equally as loud across the entire sub-bass spectrum. anywhere from the infrasonics, to the xover point, i think i am within 2db across the entire 80hz range(or the part of the range that the meter can detect anyways). so my box doesent have a peak like an SPL install will, therefore, mine will more likely be percieved to be louder despite the freq.

it should also be noted that "feeling" louder is a highly subjective form of measurement. but if anyone wants to come sit in it and compare it to any other system they are definitly welcome to //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

O OK I get it naw

 

[jake760 10+ year member]

heres the system.... it slams!//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

ampioneer 380w

sub: alpine type r 12

box: 2 cf@ 32hz built by me

 

[bloodhound50 10+ year member]

my friend jsut ripped out the center seat to put his l7 in a ported box in...

 

[SQChevy 10+ year member]

Here's a few pictures of my system.

 

[dyabolical 10+ year member]

Need more in this thread.

 

[mr_imperial 10+ year member]

i have a vid on my sig

 

[billabongcr 5,000+ posts]

MT's

solox

ssds

all in my dakota.

BTL build soon, possibly in a new truck.

 

[audiobahnuser18 5,000+ posts]

Nice work man looks real good nice job.

 

[04blackgmc 10+ year member]

took forever to get some pics but here is the box my buddy built for my truck..

single 12" downfired..

got any questions ask.

 

[audioholic 5,000+ posts]

one thing that makes my install different from an SPL install also, is that mine is equally as loud across the entire sub-bass spectrum. anywhere from the infrasonics, to the xover point, i think i am within 2db across the entire 80hz range(or the part of the range that the meter can detect anyways).

Does your vehicle have no transfer function?

 

[hoss 5,000+ posts]

all vehicles do. its a matter of acoustical physics. but using tuning you can use it to your advantage //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[audioholic 5,000+ posts]

all vehicles do. its a matter of acoustical physics. but using tuning you can use it to your advantage //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

So you mapped out your transfer funtion prior to designing your enclosure? If so, Im mildly impressed, most people have no idea to do this. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif