Not loud enough.. whats wrong??

Im running 2 RE MT 18's in 15.2 cu box with sub fwd ports up.. have around 250in of port. 2 RD d9's running at 1 ohm exceleon headunit, 230 amp alt.. 3 hc2000 batts and about 8 runs of 0/1.. tuned around 45hz only doing 153 burp and around 151 SB... Have the floor and back wall dynamatted but thats it... This seems wrong on alot of levels.. i know i need to get the amps down to about .5 but seems like my box could be wayy off and my tuning needs to be a little higher... not so muc worried about electrical right now as I am more worried about my box and setup... oh ya this is in an 08 sierra ext cab with backseat out and box under window line... someone please tell me what the hell is wrong with this... thanks for any constructive criticism.. its all about getting better

Box is kind of big with that power I would do around 8-10 cubes after displacment and about 14-16in of port per cubic foot if your doing slot port also what's the boxed tuned to?

the guy that bult your box, made it perfect for daily. But with the amount of power you have, you need a smaller box, IMO. Whats your voltage dropping to? I ran the D9s on 16 volt batts. Thats where they wake up. Are those sealed, or with the driver side door open? Are you running the d9s strapped, or one to each sub, it really makes a difference. More info please.

One rd to each sub at 1 ohm not strapped. This is with the driver door open and TL on passenger glass.. Voltage is dropping to around 12.6 .. i was thinking a smaller box... Alan gave me some good info on a smaller box but i spent about 200$ or better building this one and dont got hte cash to just go building randoms so i figured i could get some good info from you guys before rebuilding ... and ya its slot ported

and the subs are d2's bridged down to one and the box is compeletly double layered if it makes a difference..

i was going to strap em just to get and idea but i was told with the way they are run like they are if i strapped it would take them down to .25 and might tear them up??

first of all they love .25ohms. Second you dont messaure with the mic on the glass. You put the mic on the passenger floor. You'll gain at least 3 dbs in the kick pannel. Go try that and come back and post your results. You might be a little happier.

oh and if your tuning was a little closer to 65hz, you might gain another db. Then you'll be sitting at ~157dbs. Not too shabby of a score. There are guys that dream to hit that high.

daddy_j wrote:

oh and if your tuning was a little closer to 65hz, you might gain another db. Then you'll be sitting at ~157dbs. Not too shabby of a score. There are guys that dream to hit that high.

I dream of a 157...............in SB1.

daddy_j wrote:

first of all they love .25ohms. Second you dont messaure with the mic on the glass. You put the mic on the passenger floor. You'll gain at least 3 dbs in the kick pannel. Go try that and come back and post your results. You might be a little happier.

awesome.. ya i know i pick up a little in the kick... i will try to strap em tomm and see what i get and get back on here.. but ya i think a little smaller box tuned a little higher and i might get up there where i want to be.. what would be the best way to go slot or aero..

slot. I have done everything imaginable with areoports in an s10 and could only get a 158.8dbs. No matter what I did, I couldnt get higher. I have a nice aeroport box I'll sell you cheap. I mean real cheap. LOL. Dont strap them, just put the mic in the kick and then post your results. Oh and I said 157 for a burp not SB.

why ot strap them?? im not going to run them like that but i would like to see what i could get out of a burp

you can, but they produce more power not strapped. post some more numbers

just tune that box higher.. strap the amps @.5

if this is a daily box then go smaller. if your going to burp it only then leave it bigger and just tune it higher. and/or add more port

or get a 3rd 18.. 3 18s set up just like an s10 make good numbers in those trucks from what im told.. you should do 57s off 1 d9 that dont exactly fit your budget.. lol

Alan wrote:

just tune that box higher.. strap the amps @.5

if this is a daily box then go smaller. if your going to burp it only then leave it bigger and just tune it higher. and/or add more port

or get a 3rd 18.. 3 18s set up just like an s10 make good numbers in those trucks from what im told.. you should do 57s off 1 d9 that dont exactly fit your budget.. lol

Alan took the words right outta my mouth...good post sir!

Another battery or two wouldn't hurt either.

Nice wrote:

Another battery or two wouldn't hurt either.

Ya i know i need a few more batts.. I think another 18 would be the way to go.... that would keep my box smaller and i would liekt o tune in the 50's.. then i could hit some hi 150s for buring them work on some more electrical to do a good SB

Alan wrote:

just tune that box higher.. strap the amps @.5

if this is a daily box then go smaller. if your going to burp it only then leave it bigger and just tune it higher. and/or add more port

or get a 3rd 18.. 3 18s set up just like an s10 make good numbers in those trucks from what im told.. you should do 57s off 1 d9 that dont exactly fit your budget.. lol

I wads thinking the same thing.. I will try to add some more port this week and see if i can get it a little higher for now while i look for another 18 i suppose

i happen to have a MT motor or two lol

Id get more batts, and not kinetiks.

Those amps get hungry....but put out some power

finished new build.. still disappointed.. 318s now tuned to 57hz and 4 deka g31's .. amps strapped at .6 ... constructive criticism appreciated

Try woofers up port to the back wall but make sure back wall is dampened real well as well as roof. Worked great in my f150 with 2 15's....155's @ 47hz and 3000 watts clamped.

i think thats another thing is im tuned high.. i have been told these trucks peak in upper 40's .. one thing is my back wall in my box is not 45d yet which should drop it some but i was thinking of making a plug to shove in there and see if it drops my tuning and ups my numbers...

You need about 380" of port! Looks like it is a little shy on port

i guess so.. port is 5" x 57" ...

Try 6 5/8 by 57 if you have enough power this will help a lot! I ment 6 lol

im running 2 d9s strapped at .6

That should do it!

How big is the box now??? My f150 is a crew cab not just ext. cab but I have had it peak @ 47hz and 44hz now with a wall and 62hz with a crx style box(SPL only). Yeah for a daily driver box tune around 38hz-40hz and go from there.

my old box was 15.7^3 peaking at 47 witht hose 2 amps on just 1 ohm and was doing 154.. now i got a slightly smaller box at 13.2 with 3 subs and i just checked it this morning and it peaked around 62... my problem is im hitting OK usac scores but i do both.. in SE okla there are crazy meca shows in my backyard and then Usac i have to drive to okc dallas or tulsa which are alla bout 3 hour drives so i like to do both... my new build gained me 2db in kick but i lost .2 in headrest.. its insane.. if i could do 156s in floor and 153s in headrest i would be satisfied for now till i get some more money and get my electrical up to par... Just seems like when i was tuned lower i was putting up decent numbers for what i was wired at