hey guys can anyone help with a bandpass for a blazer?

ok i have never tried to build one of these bandpass boxes. usualy everything i do is ported. i was told to try one of these becuase the are so easy to build and get loud. well i built one it has 6 cubes in the rear chamber and a 24 cubes in the open front chamber. ok the equiptment is 6 of the square brutus subs 12 inch. the amps are audio pipe 30001ds.
i fired this thing up yesterday and at 40 hertz i got 148.8 i was very unhappy the last build i did in this truck for my customer did 154 well anyways i went to the higher notes and seen that 80 hertz did 146.8
these two notes where the loudest. well if anyone wants or can offer me some insight it would be helpfull.

you may want to try contacting danny britain or charles estes they are two of the best in the buisness.

thanks magoo ive been told charlse knows his stuff. ill check with him

ur welcome I havent ever had charlse do any work for me or on my car but I respect the man and his work he helped me out when I was in a jam at db finals in kentucky. He is an awsome guy. Danny is as also a man that I consider a dear friend and he is also heading up the swat team that I am a part of. If it is a wall you want he would also be a man to bounce ideas off of either way you would be contacting two of the greats in my book.

justicetn wrote:

ok i have never tried to build one of these bandpass boxes. usualy everything i do is ported. i was told to try one of these becuase the are so easy to build and get loud. well i built one it has 6 cubes in the rear chamber and a 24 cubes in the open front chamber. ok the equiptment is 6 of the square brutus subs 12 inch. the amps are audio pipe 30001ds.
i fired this thing up yesterday and at 40 hertz i got 148.8 i was very unhappy the last build i did in this truck for my customer did 154 well anyways i went to the higher notes and seen that 80 hertz did 146.8
these two notes where the loudest. well if anyone wants or can offer me some insight it would be helpfull.

im assuming this is for spl...if so ur box is way too big
try to do a small ported box it will probably work better
7 cubes tuned to 45hz with 4 6inch round ports and ur numbers should jump
but if u want to keep the bandpass theme
keep ur current box but put more power to ur box and have it tuned to around 50hz

80

The key to bandpassing is loading.

80INCHES wrote:

justicetn wrote:

ok i have never tried to build one of these bandpass boxes. usualy everything i do is ported. i was told to try one of these becuase the are so easy to build and get loud. well i built one it has 6 cubes in the rear chamber and a 24 cubes in the open front chamber. ok the equiptment is 6 of the square brutus subs 12 inch. the amps are audio pipe 30001ds.
i fired this thing up yesterday and at 40 hertz i got 148.8 i was very unhappy the last build i did in this truck for my customer did 154 well anyways i went to the higher notes and seen that 80 hertz did 146.8
these two notes where the loudest. well if anyone wants or can offer me some insight it would be helpfull.

im assuming this is for spl...if so ur box is way too big
try to do a small ported box it will probably work better
7 cubes tuned to 45hz with 4 6inch round ports and ur numbers should jump
but if u want to keep the bandpass theme
keep ur current box but put more power to ur box and have it tuned to around 50hz

80

Shouldn't you know what year Blazer and his resonant frequency of the vehicle before you give out building equations? Just asking.

Depends on what your tuned to and what freq peaks in your vehicle. Also how the subs are loading.

Need more info to really help either way.

Exactly.

loading is one factor ..tuning is another factor as well
but he obviously has subs that like more than 6 cubes sealed
thats y i suggested more power..
but anyway wat do i know ...im a nobody

80

thanks for the info guys i will take a few pics of what the build looks like right now maybe it help understand what this is i was told it is a bandpass and this is how i should do this blazer
it is a sealed box 6 cubes inside a larger box that has no front. it kinda looks like a wall all the way in the back of a square box i was told this is called a usac band pass it was suppossed to be simple but its just confused me now. cuz i have no idea how to tune this thing or load it. if it was a large ported box or a small crx box i wouldnt be so confused.. o here an example caleb or ducttape has something simular in his blazer several years ago he had 4 15s in it.

justicetn wrote:

thanks for the info guys i will take a few pics of what the build looks like right now maybe it help understand what this is i was told it is a bandpass and this is how i should do this blazer
it is a sealed box 6 cubes inside a larger box that has no front. it kinda looks like a wall all the way in the back of a square box i was told this is called a usac band pass it was suppossed to be simple but its just confused me now. cuz i have no idea how to tune this thing or load it. if it was a large ported box or a small crx box i wouldnt be so confused.. o here an example caleb or ducttape has something simular in his blazer several years ago he had 4 15s in it.

Check your p.m.

I have had one of those boxes u are talking about my opinion don't waste ur time there r plenty of other loudr things u can do.

ok cool. i was just trying something different. i have build so many ported systems i was wanting to do something diffent. but i can make thing this work yet so im gonna tear the baffle out and go back to a ported setup. thank for all the input

what year blazer?

i know all about calebs old blazer....and trust me its more complicated than what u think

johnperdeye wrote:

i know all about calebs old blazer....and trust me its more complicated than what u think

Complicated? surely not.

XFL-Leader wrote:

johnperdeye wrote:

i know all about calebs old blazer....and trust me its more complicated than what u think

Complicated? surely not.

x2

I think im just gonna try to load a small ported box in the chamber i built maybe that will be better, since the bandpass seem to be more complicated than i understand.

bandpass it self is not complicated there are just certain factors u have to understand about it

johnperdeye wrote:

bandpass it self is not complicated there are just certain factors u have to understand about it

x2
80

johnperdeye wrote:

bandpass it self is not complicated there are just certain factors u have to understand about it

What numbers do you do with a bandpass?

i beleive he did around a 161+ in 0-1k mod 2 years ago. he has calebs old blazer so im sure he knows something about it,lol. like these guys have stated, we need a little more info. if you dont want to post it publicly, your more than welcome to pm me or anyone you'd like the info and im sure you will recieve plenty of help.

i saw my name a few times...LOL!!! i am still around here, i just never post anymore. bandpasses are not that hard, you just have to think outside of the box.

hello Caleb good to see you still check in once and a while. whats news

No news really. I am done with competing. I have moved on in life. I bought a house, and finished college (2 B.S. degrees and 1 M.S. currently) until they send me back to get a PhD. I got rid of the Blazer I competed with so I would have no choice but to get out of it. I still get on here and read things every now and then.

Good to see there is still conflict in USACi. It will never go away...

now come on caleeb be positive...........