mlstrass

I see the 3 experts have chimed in. So tell me how many 155-160db on music sets up have any of you built? Since we already know the answer is ZERO, tell me how it is your have any idea what it takes to make mids/highs keep up with the bass at that level? Old thread, so I'm hoping the OP ignored you bozos and figured things out on his own....

you will have to ROLL up the volume with the amps at .25ohm each. Highly unlikely that they'll street beat that low, but I've seen them do it at .33... .25 each will easily get you your 155+, should be a 56+

You don't need midbass assuming you'll primarily be playing rap stuff when you demo. Midrange PA speakers will be fine. I run Selenium mids and Crescendo XST supertweeters, also have some Pyle bullets that others have hated on and more then likely have never heard. My front stage keeps up with 160dB's of bass and sounds pretty good when playing real music. That's about all you can ask for when doing a build like that. Setting up xover points/slopes and some EQ work help a lot, as does NOT overpowering the crap out of the speakers. I prefer to run more speakers then necessary with modest power levels. Everyone can throw out their opinions on what will/won't work but I've done a LOT of these set ups and speak from experience....

I used several rolls of the 80mil about 4 weeks ago. Vinyl backing pealed off easily and it went on fine and seems to stick very well. I'm thinking you got a bad batch, so hopefully he makes it right. Only deadener I've had issues with so far was the ss b stock I bought a few years ago, seemed to have zero adhesive properties to it. SDS tiles are the best product I've ever used.

Still no return phone call and I've left messages 2-3 times per week. Going on 16 months since I paid for it. Can't get my alt or my money refunded since all I ever get is voicemail and they never call back. Robbie at DC is the biggest douche I've ever dealt with in car audio. Seriously hope that nobody supports his joke of a company....

Been another 4 weeks since my latest line of BS/excuses. Robbie won't return a phone call or email. I've asked for my $$$ back several times. Beyond sick of this joke of a company. Team mate ordered 2 390's 3 weeks ago and got them today. Why can't I get mine. DC = doesn't come Sucks they have the best alts out, but their CS is non existant. I can only imagine if 1 of the 2 I have ever fails.

DC has the best alts out there IMO, but CS is horrible if you don't have a GM vehicle. Going on 14 months now since I paid for my 390xp and I still don't have it. 270xp for my altima took 3-4 weeks. 270xp for my van took 9+ months, 390 was paid for in March of 2011. If I didn't think they were the best I wouldn't still be waiting. I have team mates with GM vehicles that get alts in under a week.

30Hz is pretty low for those subs if you want to get the best numbers out of them. Where do you peak? Tuning higher would more then likely up your score...

I switched from 3's to 4's over the winter. I've only played them loud on songs in the mid/upper 40's so far. Was good enough to take out another windshield a few weeks ago. Seem to have plenty of punch to them on the rock/metal stuff I've played. I'll see how they do on the low stuff next weekend at a comp. I run a 3500 at .5ohm on each one and they seem to take it just fine.

If I had 1500watts to play with and was looking at FI subs, the Q or BL would be my choice...

mostly because the majority of the people recommeding the FI sub have never owned or heard one. OP if you want to go with the HDC do 7cubes net, 16^2 port area and tune 34-35Hz if you plan to mostly play low stuff. I run a single 18" HDC in my daily driver... There are obvious reasons to pick the BTL over the HDC any day... Perhaps if you stated those "obvious" reasons there would be at least one more useful post in this thread...

mostly because the majority of the people recommeding the FI sub have never owned or heard one. OP if you want to go with the HDC do 7cubes net, 16^2 port area and tune 34-35Hz if you plan to mostly play low stuff. I run a single 18" HDC in my daily driver...

x2 100 watts is WAY too much for those tweeters and 1 per door is plenty for your mid set up. I run the Nendo XST's, 2 per door, but I have a LOT of pa mids also. Not sure how these will compare to the AQ supertweeters, but I've installed a few sets of those and they sound quite good. VERY full bodied and able to get quite loud, but not harsh/shrilly sounding at all.

ported box tuned mid/upper 30's is what I'd do. I run AQ HDC's and listen to mostly 80's metal. They have a lot of punch on kick drums. 2 12's or a single 15 as it takes some decent cone are to feel that thump in the chest... I run a 15" FI Q in the wife's car and it's solid on metal also. Ported enclosure...

higher notes have much less excursion = much less cooling for the VC's you might not have been clipping, just now you've lowered the power even more so the subs aren't being pushed as hard. You might be able to lower the LPF and turn the gain back up going off your clipping indicator to know how high to set it...

CDL tiles will help, but assuming you have a wall now then plan on doing 3/4" hardwood directly to the roof and/or 1/8" steel plate. I have a walled vehicle also and did the wood first using PL glue. First time I turned it up loud on music it delaminted some of the 11-ply birch I used. That's why I suggest using a hardwood as birch/MDF will come apart if there's still flex. I also used a LOT of SDS tiles (180) in the vehicle and it does stop panel vibration. Adding mass with the tiles will not totally eliminate flex, but it will stop all rattling/vibrating sounds which is probably what you're after. It all depends upon how loud you are/what vehicle as I also built a walled Caddy a few years back that does a 55+ sealed up and we just used the CDL tiles on his roof and it's fine.

Sucks that someone was playing Bieber during the OP's run

White Caddy is BigJoker from Team DOA. 2 9518's in wall....he lives in Bolingbrook.

The vehicle acts like a 6th order bandpass. exactly, Increasing port area can sometimes overcome that effect...

Assuming the box will have an "L" port for tuning that low, then yes there could be an issue if one sub's rear wave hits the port wall and the other doesn't. Can cause uneven loading on the subs which could hurt output/efficiency. Loudest trunk cars are using port in the middle, usually an external aero...

Adjusting seat positions, ac vents, sun visors, etc will also give similar results, in the aspect that it'll help on the meter but you won't hear any difference. i cant stand doing all that shit.. it erks me.. i wish i had it in me to just sit some where and do it.. but i dont have the alt for it. Adjusting my seats helps me gain a tenth. What i do is play at like half volume and try all the things listed above, to see what meters most. That way when i play full tilt i can be sure im going to get highest numbers possible. a gain at lower volume does NOT always equal a gain at full volume. Enclosure/cabin can react differently when pushed to the max. See what things gain at 1/2 volume, keep a log of them, then try the ones that helped at full volume. And it's not a waste of time if it's something you want to do whether you compete or not...

Welcome to M5.com, tis why I left several years ago. Book smart with no real world experience but his "word" is gospel around here. I used to waste my time offering advice and dared to go against what he said, so he started PM'ing me because I dared to speak out against the great Oz....

how much power will you be running to the subs? Coppers are more efficient and will get louder off less power, up to around 2kw each. More then that and you'll want the alum coils. I've had several VC configs of copper and alum in my car. Currently running alum coils with 2 3500's on each sub @ 2ohm each for daily and .5ohm each for metering. they take it like a champ....

4cubes net @ 38Hz with 64^2 of port area would work well. If you can go bigger that would be even better since you don't have a ton of power on the subs. 4.25-4.5^3 net is what I'd shoot for...

Come on out as this should be a great show. Team DOA will be there, so lots of AQ set ups