dylan117

Can anyone please shoot me a design for a 4th/6th order band pass that's for 4 dc XL 18's tuned at anywhere from 26-32hz and I need it to be 24 cubic feet (full sized for 4 18s) (6cubes per sub) and space is not an issue matter of fact it's going in my basement for a little while. Lol thanks ahead of time

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so I just got my single XL 18" a few days ago and just started using it today and my box is tuned at 29hz now I do give it this it hits WAY lower than my 2 level 3 15s but the highs/SPL isn't a loud I know its 2 15s vs 1 18 but I think it has more potential so what would be the tone/hz that would do the most DB in a 29hz box?

I was wondering the same thing cody so you just answered my question to

Oh ok then, thanks!

Yeah but its gonna be longer than i thought until i get a car so ittl be a long stretch

Ok SO i already have 2 level 3 15s as some of you may know but i want to get some more beefy/bigger subs i am looking at an XL 18 M2 and i was going to put it in 12.3 cubic feet tuned at 29hz now i know 12.3 sounds way WAY to big but heres the catch i have a really small amp ot only does 1200rms at one ohm i am going to get dual 1.4 ohm coils so i can wire at .7 ohms so i might get 1300-1500 out of it the level 3 15s are in 6.2 cubic feet tubed at 33hz the XL will be in 12.3 tuned at 29hz i was thinking about getting some medium but not stiff spiders to keep it from flapping all over the place and bottoming in that box but its only 1500rms going to a 2200rms sub so in your guys opinion what could be louder now lets say the box the 2 level 3s are in isnt exactly a top notch box but the XLs box would be a much better and lets also say maybe if it isnt going to be louder now, will it be when it gets full rms? i was planning to get 2 in the future but thats a while from now... Sorry for the really long story there just alot to describe here lol hopefully i made some since here!

So i trying to decide what to do ive already got (2) level 3 15s and i wanted to get some more so what would be louder (4) level 3 15s or 1 level 5 15/18 it depends on if i van get a box for an 18 or not but the thing is ive got a really REALLY small amp it only 1200rms so each level 3 would only be getting 300rms as the level 5'wouod be getting 1200 so i dont know what to do here

Ok thanks cody

So im thinking on what to do with my $600 i already have 2 M2 level 3 15s and i was thinking about buying 2 more (i would have 4 total) BUT they would only be getting 250-300rms per sub my other choice was 1 XL M2 18 getting 1150-1200rms i know i would have more cone area with the 4 15s but the 1 XL M2 18 would be getting alot more power what would be louder in your guys opinion the XL M2 18 would be in 6.2 cubic feet tuned at 33hz ported and the level 3 15s would be in 12.1 cubic feet tuned at 33hz ported of course

What what be louder in your opinion 2 level 3 15s or 1 xl or level 5 i know more cone area is important but the other subs handle alot more rms and have more motor force they would. Both be running at a 33hz tunung dont know between an 18 or 15 yet

Box specs: L-ported 6.2 cubic ft @ 33hz (Ive got 2 in the same box)

How much can the level 3s really take (15 inch in my case) i know there rated for 900rms but ive heard that DC way underrates every thing

@WCA Rusty even though my shirt is airbrushed can it still count as a shirt that could win (even though its not a printable design)

@STEALTH808 thanks man glad you like my shirt

Hey rusty is my shirt going to be entered in the contest i didnt know how else to get better pics of it lol

Here it is!: EDIT: I fixed the image link

Well my box is L-ported so i have the port on one side not the middle like the prefabs but the port wall does run halfway behind the motor of the sub that moves a little more (the second part of the L port that runs inside the box)

Well thats the thing my old sub is actually TIGHTER that my new sub i dont know if this can cause like a canelation issue or if they are out phase would it help if a changed the phase setting on my amp from 0 to 180 or somehwere in the middle?

So im pretty sure my subs are out of phase (1 is moving a little more and it seems 1 hits a little earlier or something)? Ill post a video i uploaded to youtube heres the link:

Alright ill pull em back out maybe later if not itll be tomorrow BTW: how do you post a pic on this forum all i see is my content or when i click photo it says URL?

@bbeljefe that could be let me describe it this way ive got 4 terminal connections on my box (2 for each sub) i have them wire like so + to + And - to - but they are not wired together i have 2 sets of wire for each sub ( one pos one neg) there both dual 2 ohms wouldnt that make it 1 ohm on each sub i have a pos and neg wire for both subs coming out of my box (2 wires per sub going to the amp) would that still be 1 ohm on each or would that be 0.5 or 2 ohms? Can someone explain what that would be as far as load the amps seing?

Ok sweet i was worried that i didnt even need the 2nd sub but looks like its all gonna be what i needed so anyway thanks for all your help guys DC audio FTW as always! BTW: when you said phone thrower did you mean rusty or me or both lol?

Oh alright then so you think when i get them the power they need 900-1200 each that it will be alot louder than before?

Could it be equally as loud as 1 on 1000-1100 rms the 2 on 500-600?