blowthrough comp setup

[pocket5s 0]

I'm really considering using Fi subs for a new comp setup. Vehicle is a full size pickup, so it will be a blow through solution. The primary question is, which sub(s) to go with.

Goals: 150db at headrest, 130db outside on music. It will be entered in MECA's spl and park and pound format. P&P being the 130db outside goal.

The two goals are the max points I can attain for what I'm looking for. Obviously if it is higher that's fine. One individual at the 2012 finals did a 155/129 on 4 speakers in a wall (don't know brand and I think they were 15's).

I was originally thinking of a single 18, but I'm not sure that will get there. Also, if possible, I'd like to keep the box height to no higher than the top of the bed ( 19" outside dimension ). My next thought was a pair of BTL 15's, either N2's or N3's. If I can do it on a pair, all the better, since they won't really be daily music subs (except for some occasional fun, as I'll have another sub for SQ duties) so I don't want to drop 3k on subs that'll get used a few times.

Power and electrical will be acquired based on what subs are chosen.

So with that in mind, is this obtainable with a pair of 15's or asking a bit much? I wouldn't mind 18's, but I don't think I can angle them enough to fit my height requirement, which is a shame 'cause the cost difference is negligible. Although they could be up/down firing in a bandpass enclosure...

Thoughts?

[kylehallstrom 1]

there is no replacement for displacement. get the most cone area

[swift 501]

For a blow through to do that I would go with probably 4 15's and atleast 6k watts.

Not the same obviously because I have a low tuned street type setup but I did a 150 headrest and a 128 PP with 2 18's on about 4k. I also did a 153 headrest 131 PP with 3 18's on 5k.

remember you will be in a Mod class because of the blow through. So think about cone area + fuse rating x10 = class your in.

Edited February 6, 2013 by swift

[pocket5s 0]

I'm not really concerned with whatever class I'm in. Honestly I'm going for bobos this year My truck is mostly SQ focused but I need the 150/130 for overall (in addition to the other stuff of course).

I'd rather do 2 18's w/4k and accept the enclosure height over spending another $3k for 2 more 15's and associated amps. I intended to build a custom tonneau cover, but I could accommodate another setup if needed.

I notice in your sig you have 3 18 SP4's. My first modeled design was a single 18 SP4 in a bandpass box

[swift 501]

I'm not really concerned with whatever class I'm in. Honestly I'm going for bobos this year :)/> My truck is mostly SQ focused but I need the 150/130 for overall (in addition to the other stuff of course). I'd rather do 2 18's w/4k and accept the enclosure height over spending another $3k for 2 more 15's and associated amps. I intended to build a custom tonneau cover, but I could accommodate another setup if needed. I notice in your sig you have 3 18 SP4's. My first modeled design was a single 18 SP4 in a bandpass box :)/>

Well if your not concerned with classing then go with alot of power, 2 18's and run M4. That would allow some big power to be used and should meet your goals. I'm still not famiiar with bobos, what is that again?

[pocket5s 0]

Well if your not concerned with classing then go with alot of power, 2 18's and run M4. That would allow some big power to be used and should meet your goals. I'm still not famiiar with bobos, what is that again?

Best Of Best Of Show. combination of SPL, P&P, ""SQL"", Install and RTA. Last year's winner has a really nice escalade walled. almost maxed the two spl parts, does really well in install (77) but SQ is his weakness. So if I can come match his install and spl I have a good chance of grabbing it this year. Most SQ folks don't even attempt bobos.

Edited February 6, 2013 by pocket5s

[///M5 2,833]

If you aren't "limited" in enclosure volume, 19" should easily allow enough angle to fit 18's.

[///M5 2,833]

Curious, not familiar with the rules. Can you do the 150 & 130 with different setups? ie, have a moveable tonneau?

[swift 501]

Cool, sounds fun. Thats alot of money out each event though to enter each class. Sounds like my kind of thing. Goos luck with it and create a build log. I have my second Meca event this year on Sunday at Freezefest. Should be a fun day

[pocket5s 0]

If you aren't "limited" in enclosure volume, 19" should easily allow enough angle to fit 18's.

I was just looking at the images, and it appears I could get maybe an inch or so in height, but I don't have one on hand to test.

Cool, sounds fun. Thats alot of money out each event though to enter each class. Sounds like my kind of thing. Goos luck with it and create a build log. I have my second Meca event this year on Sunday at Freezefest. Should be a fun day

Yea it is. Given my location and lack of competitors it shouldn't take too many shows to qualify for finals in order to go for the big one. Once I qualify on the SPL side I'll just finish the year in SQ to save money, except for state finals.

I wish I could have made freezefest, but the truck is in pieces audio wise. We went to Vinny last summer and that was a good time. Long trip though (10 hours), so not sure we'll do it again. Save the long trip for finals

Curious, not familiar with the rules. Can you do the 150 & 130 with different setups? ie, have a moveable tonneau?

That is a very good question and I haven't seen anything in the rules that would say 'no'. It has the same basic class structure and rules as the regular SPL, except it must be on music and is a 30 second run. And of course it is measured outside the vehicle.