how to find my trucks peak frequency ?

[big scott]

how would i go about finding what my truck frequency is ?

i would love to know.

also can it be changed ? if so how.

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[Jeffdachef 5,000+ posts]

You can lower the peak frequencies by cld sound deadening.

 

[LosIsATool 5,000+ posts]

Take a sealed sub with a sealed qts .7 box. Run it on the TL to find its peak. pull the sub out side and do it again. the average of the two is the cars peak.

 

[brian84corvette 10+ year member]

i just load up the test tones from a bass mekanic cd and set volume to 3/4 and let them play ( sensibly - between 35 and 60 hz is where most will peak ) narrower than that will be in the 45 to 60 hz tones

but yeah let them rip if you have axess to some type of sound meter - even better - as you will have concrete results that your viechle is xxx loud on each frequency - you can plot those numbers on a graph and see your response curve - hopefully its pretty flat for daily music.

changing peak frequencys are all dependent on viechle / box placment / windows up or down / sound deadner applied here or there or not applied - its a crazy process

im in the same boat actually - ive decided to tear out my peal and seal roof - and do a full plywood roof - and let me tell you = so far my peak frequencys have changed to a higer number than they were when i had peal and seal roof in... but im not done building yet - and it seems that each new piece of wood that goes on also changes what is happening in the hz range in side my burb. its hell trying to find songs to demo with - as some that were not amazing before - now bounce the winshield wipers off the front windows and give liquid steering wheel effect - and songs that were my go to now dont hit as hard....

but

im shure its all worth it - im swapping out my window line box with 2 18s and building in the truck c pillar 4th for six 18s and more power - multi layer plywood roof for stiffness and no roof flap / flex sounds - and i might end up with a few stripper poles to keep everyting super solid. once its all super solid i hope that my peak frequencys come back down a few...