opinions please ...for an SPL box...

[ExtremeAcres]

HI guys... I'm starting to throw around the idea for an SPL box in my truck..

I'd like to build a box ...for SPL... here's the parameters Im working with...

This is going to be a removeable box(with built on handles etc.)..and It's going to be powered by the sub output of a jl HD900.5 ...so approx 500W rms...(hopefully the JL is a little over rated ...so maybe 550-600W)

the dimensions I am working with are :
... a Base of 21" x 21" ...and I would like to only go 22" in height or so... but could go to 40" if it was gonna make some kind of huge difference... the Box will be located on the folded down 1/3 rear seat of a 04 GMC crewcab... with about 8-10 inches between the box and the rear wall of the truck ...and about 3 inches from the passenger door.
I mention this cause I'm inquisitive about which direction I should face the Subwoofer...and which direction or WHERE the Port should Exit...

So far ...I've been thinking 1 15 ....in a near cube shaped box ... vented... with about 3-4 cu.ft total airspace.... I'm thinking I should use 1" mdf... or ? would 3/4" work ? and maybe just 1" on the sub mount side ?

realistically...if I do everything right ... and Build damn near an optimum box...and choose the right sub... what kind of numbers can I expect Db wise ? ( 1 15 ...ported box... 500-600W rms... in a crew cab truck cabin) ?

feel free to tell me that I'm not choosing the best setup for those space requirements... I'm open minded to do whatever might be best for ...THAT box size ...and that wattage ... in that truck...

also feel free to reccommend a sub brand or model...as i havent made any choices in that area of this project yet...i have so much to learn (i dont want to spend hours researching 15's ...if all the experienced gurus are gonna say "Oh No ...4 8's wil work better in that App... or ...Go with 2 12's instead of 1 15" ...I need some guidance (some mentoring)... as to what to look into and research...

Thanks in Advance ...for any ideas or opinions...

Christian

[Porky]

If you are serious about competing in SPL, you may want to consider more power.

[ExtremeAcres]

yeah...I'm more serious about competing in SQ... but i'd like a "drop in" SPL setup... just for the Knowledge , experience, and a little variation with what Will already be a decent sound platform in my truck. Plus i'm trying to keep the costs reasonable... Like MDF + a Sub... and I'll put all the time research and effort in from there on in (which doesnt really cost dollars...just time and perseverence)

I dont want to be competative ...as much as hit Impressive Db's FOR the amount of power and the simple 1 Driver setup that I'll have going on ... you know ?

in reality...my car did 132.2 a couple weeks ago...with 1 10 and 300Wrms ...and now (with a new, better sub it... it's a little louder... maybe it will do 133 or even 134....)(but i won the SQ class...so I was very happy about that) I sat in someone elses car who did 138 ...and i could hardly tolerate it... So I'm not looking for CRAZY SPL (like 150 or anything ) ...but it would be nice for my truck to be able to blow away my car...like go into the 140's easily maybe ...and even though I would very rarely ever go there... it would be nice to know that I could and I have ...

I just want that (the best I can do with 1 15 and 500 W) ...UNLESS...someone reputable... says different drivers would do better in that box area with that power.... but so far I've been following the KISS method and things have been working out nicely... so 1 15 seems to follow that pattern.

Thanks for the advice though ...seriously

[dohckiller808]

140 is doable with a 15 and 500 watts. although the box would need to be way bigger. ports gonna be rater large and its gonna be a one note wonder.

[ExtremeAcres]

Originally Posted by dohckiller808

140 is doable with a 15 and 500 watts. although the box would need to be way bigger. ports gonna be rater large and its gonna be a one note wonder.

well by my math i could go as big as 10 cu.ft. ...but that will be one helluva a huge ...removeable box...(forget the handles...I'll have to put castors and a hydraulic wench...lol

Really though ? what's my weak link ? the amount of power ?

what kinda Db can 500W put out in the best situation?

[dohckiller808]

your power is your weak point. at 1000 watts youll get 140db no problem with a little larger than spec box still "sql"

6^3 at 16^2 per cube for port. at 1000 watts "musical loud"

6.5^3 at 18^2 per cube for port. at 500 watts not so "musical" but loud

im just guesstimating but from the numbers i normally see this would do it.

[soundevolutionaudio]

Originally Posted by dohckiller808

140 is doable with a 15 and 500 watts. although the box would need to be way bigger. ports gonna be rater large and its gonna be a one note wonder.

LOL Show me were a person is doing 150 on a TL with 1 15 and 500 watts....


I would drop 2 12's and more power.


DC Audio - Woofers
Audioque: Heavy Duty: HDC3
Digital Designs Speakers Made in the USA - Car, Home, and Personal Audio | ddaudio.com
Welcome to Atomic Loudspeakers
TREO Engineering | Welcome

...:::: SOUNDIGITAL ::::.... hope u can read Spanish.
Stetsom - Amplifiers - Novelties

just to give you some idea's from companies that have proven themselves over and over again...

But just cause you have good product, 85% is going to lie on your install, and a lot of testing and I mean a lot of testing, box after box after box. that''s why I don't compete anymore, I don't have the time...

Since you are putting this in a Truck I'am sure you don't care about weight but if you do, you can use baltic birch..

Just my 2 cents,

[ExtremeAcres]

Originally Posted by soundevolutionaudio

LOL Show me were a person is doing 150 on a TL with 1 15 and 500 watts....


I would drop 2 12's and more power.


DC Audio - Woofers
Audioque: Heavy Duty: HDC3
Digital Designs Speakers Made in the USA - Car, Home, and Personal Audio | ddaudio.com
Welcome to Atomic Loudspeakers
TREO Engineering | Welcome

...:::: SOUNDIGITAL ::::.... hope u can read Spanish.
Stetsom - Amplifiers - Novelties

just to give you some idea's from companies that have proven themselves over and over again...

But just cause you have good product, 85% is going to lie on your install, and a lot of testing and I mean a lot of testing, box after box after box. that''s why I don't compete anymore, I don't have the time...

Since you are putting this in a Truck I'am sure you don't care about weight but if you do, you can use baltic birch..

Just my 2 cents,

thanks for the reply... but I dont think you read these posts very well... where do you see anyone talking about 150 Db ?

... and 2 12's wouldnt be out of the question... ..BUT... 500W is 500W...I am not buying another Amp... and I'd rather have the challenge of doing the best I can do with the Amp I got...

thanks again

[Bigg Boy]

we were doing a 147 with a single 15" in a extended s-10 on like 700w.

its possible

[TrickyRicky]

Trust me, size matter, the bigger the better (atleast thats what she said,lol). I have a friend that build a 48"L x 18"W x 24"H (yeah it was a big SOB) but he had a suburban. And then I sold him my 2 Xtant X124 (the hexagon subs) and I already thought they were loud, but when he installed them in his box and powered it with a BD1000 it was REALLY LOUD nasty bass.

PS: About 5 days after the sale/installation he told me he blew up the subs, I was really pissed since I sold them real cheap. Just keep in-mind that just go as big as the manufacture specs and you dont need a lot of power if you have a big enclosure.

Or just let PWK design your enclosure, he is pretty much the best and he can make a 3.5" speaker sound like a 10" subwoofer. Dont believe me check it out on YouTube. AND thats with HU power, no amplifier.

[ExtremeAcres]

Originally Posted by Bigg Boy

we were doing a 147 with a single 15" in a extended s-10 on like 700w.

its possible

very cool dude.... is there a build log for that truck anywhere ? thanks man

[Bigg Boy]

We have that truck's box design under wraps.

It is do able. your key is going to be efficiency.

Box we had was 48x17.5x20 for a single 15.



What is the max size, not leaving any room for sub and port? I'll see if I can work something for you

[ExtremeAcres]

Originally Posted by Bigg Boy

We have that truck's box design under wraps.

It is do able. your key is going to be efficiency.

Box we had was 48x17.5x20 for a single 15.



What is the max size, not leaving any room for sub and port? I'll see if I can work something for you

idk what you mean by (not leaving any room for sub and port )

the total space that this box needs to fit in is... 21 x 21 x 40 inches...

[Bigg Boy]

You said you have 8-10" from the wall, and 3" from the door.

so you could build a box that is 24"x28"x40 correct? (I know this leaves no room to place sub or port, I will allow for this)

[ExtremeAcres]

Originally Posted by Bigg Boy

You said you have 8-10" from the wall, and 3" from the door.

so you could build a box that is 24"x28"x40 correct? (I know this leaves no room to place sub or port, I will allow for this)

well, i'd say more like 28 x 21 x 40...cause the door armrest sticks out 3 inches... I just told of that 3 inches ...in case that was a good amount of space to blow the port or face the sub... but the door armrest will touch the box...or be dang near it

[Bigg Boy]

okay, let me see what I can do.

whats your budget for woofers?

[ExtremeAcres]

budget for woofers is reasonable.... something in between...not the most expensive for sure....I'd say 400-600 dollars

[Bigg Boy]

Was 28 the depth of the box and 21 was the width correct?


and what final impedance do you need for your amp?

[ExtremeAcres]

yes...28 front to rear ...and 21 side to side...and 40 high ...basically tucked into the rear corner of a crew cab...(passenger side)

[TrickyRicky]

Or you can get a "TOBY" box. Located in Fort Worth Tx, his boxes are very loud and only require 200-watts or less with just one 10" sub (ofcourse you can choose from one 10, dual 10's, or a single 12") but either will be VERY LOUD. Not sure how loud in dbs, but I know its just as loud as 3 12's with a 800watt on them. Their around 300 bucks but trust me its worth it since it comes with the subwoofer (which Toby himself designed and the box also).

[ExtremeAcres]

Originally Posted by Bigg Boy

Was 28 the depth of the box and 21 was the width correct?


and what final impedance do you need for your amp?

4 ohm ... JL HD900.5 amp

[cubdenno]

DD 1500 series sub.

A pwkdesigns.com enclosure design....

Pete does design work and has become the go to guy for DD, Audioque, PAP and a couple of other companies.

You give him some info and he works around the specs, goals and physical constraints and vehicle acoustics. Best 50-60 bucks you will spend. And the box is so much easier to build using his blueprints.

These are the 3D drawings included with his blueprints.

If you do get a design from him, get the rush. He is busy. if it seems like it is taking a long time, contact him with case number as he has email issues cause he lives in the boonies.

Or build, try out. Build try out. continue until you get best results.

[TrickyRicky]

Originally Posted by cubdenno

Or build, try out. Build try out. continue until you get best results.

I rather pay 60 bucks and get the best design from PWK. He takes everything into mind when designing an enclosure. You must be crazy to spend a lot of money on building different enclosure just to try to get the right one.

[Bigg Boy]

ExtremeAcres are you going to go with a pwk design. Or would you be interested in some thing I can come up with.

I have no problem doing it for you. I just don't want to spend 1-2hrs on a design that will never be built.

Ps: This is meant to be no disrespect to pete or any of his followers. Pete is very good at what he does. But he is not the only person that does what he does. Not trying to say I am better then him, or anything like that, in fact I look up to him... Just saying it doesn't have to be a PWK.

[cubdenno]

Originally Posted by Bigg Boy

ExtremeAcres are you going to go with a pwk design. Or would you be interested in some thing I can come up with.

I have no problem doing it for you. I just don't want to spend 1-2hrs on a design that will never be built.

Ps: This is meant to be no disrespect to pete or any of his followers. Pete is very good at what he does. But he is not the only person that does what he does. Not trying to say I am better then him, or anything like that, in fact I look up to him... Just saying it doesn't have to be a PWK.

Hey man, no disrespect to you either. Did not mean to seemingly ignore your post. I jumped it somehow. I just went back and reread them all. I somehow missed yours. Kudos to you offering to help him out.

I agree with you 100%. I have ordered 5 designs from him and have been trying to figure out what he sees in his planning and design process and incorporate it into my own for people who can't spend the money on the design.