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rosshimself13
07-28-2013, 01:45 AM
I picked up a couple of ID subs from a guy at work. He claims they are SPL's they are 15'' subs with a double stacked motor and a stamped basket. The claim i dont trust is that the were built for 2200rms a coil, i saw quad coils which were even more rare and then the dvc most said would handle 1100rms since what tiny amount of info i could find suggested the use of the IDQ specs for enclosure design ive chosen a bandpass. this will be a blow through in my 06 nissan frontier, I think im settled on 4 sealed 8 ported, tuned to 45 with 2 10'' sonotube ports, i might be able to get away with 8's if i can do my own flares.

Any serious suggestions are welcome. i did not list an amp because i dont know what these things will handle but i have an AP30001d sitting around.

rosshimself13
08-02-2013, 03:09 PM
26544079

and go. hows this look? thinkin some 3/4 plexi in the access panel and all thread for bracing, what size all thread is suggested i was thinking 1/2" would be plenty if i use neoprene and regular fender washers.

scratched the round ports as then i have to cut multiple holes and cant find 10" pvc for a reasonable price

rosshimself13
08-02-2013, 06:47 PM
anyone come to this site anymore?

bubbagumper6
08-02-2013, 07:49 PM
anyone come to this site anymore?

Not many with technical knowledge anymore. I don't know much about bandpass enclosures man, but I say just build it and post a build log. :santa:

rosshimself13
08-05-2013, 07:37 PM
:zzzzz:

rosshimself13
08-06-2013, 09:03 PM
I need to know if this looks like a decent design, the bracing i plan to do is all thread and mdf what size all thread should be big enough? Does this look like it will work well, or should i try to change the design entirely?

rosshimself13
08-08-2013, 12:55 AM
bump for some help

SounDrive
08-08-2013, 01:05 AM
I picked up a couple of ID subs from a guy at work. He claims they are SPL's they are 15'' subs with a double stacked motor and a stamped basket. The claim i dont trust is that the were built for 2200rms a coil, i saw quad coils which were even more rare and then the dvc most said would handle 1100rms since what tiny amount of info i could find suggested the use of the IDQ specs for enclosure design ive chosen a bandpass. this will be a blow through in my 06 nissan frontier, I think im settled on 4 sealed 8 ported, tuned to 45 with 2 10'' sonotube ports, i might be able to get away with 8's if i can do my own flares.

Any serious suggestions are welcome. i did not list an amp because i dont know what these things will handle but i have an AP30001d sitting around.

If they really are ID SPLs (very rare subs) then yes they're similar to an IDQ. They're not exactly a 4th order friendly sub from what I can see of the TS parameters. And if you put that AP3k on it with all kinds of distorted power they'll go up in smoke.

rosshimself13
08-08-2013, 01:17 AM
where are you getting specs from? the ones i have seen from ID's site for the idq suggest it wouldnt be a bad sealed sub, meaning it should do well in a 4th order.

SounDrive
08-08-2013, 01:36 AM
where are you getting specs from? the ones i have seen from ID's site for the idq suggest it wouldnt be a bad sealed sub, meaning it should do well in a 4th order.

You (generally) want a sub with high Qts, low Fs, and higher Vas.

---------- Post added at 11:36 PM ---------- Previous post was at 11:36 PM ----------

Read this first:

http://www.caraudio.com/forums/enclosure-design-construction-help/581717-4th-order-thread.html

rosshimself13
08-08-2013, 01:52 AM
You (generally) want a sub with high Qts, low Fs, and higher Vas.

---------- Post added at 11:36 PM ---------- Previous post was at 11:36 PM ----------

Read this first:

http://www.caraudio.com/forums/enclosure-design-construction-help/581717-4th-order-thread.html

qts: 251 fs:20.5 and Vas:9.45 cu ft is what i have found for the d2 IDQ 15

SounDrive
08-08-2013, 02:31 AM
qts: 251 fs:20.5 and Vas:9.45 cu ft is what i have found for the d2 IDQ 15

The qts seems pretty low, but you might still have good results

michaellane
08-08-2013, 02:53 AM
Pics of subs?

rosshimself13
08-08-2013, 03:23 AM
putting the pair in just under 4 cubes sealed after bracing and adding poly-fill to that with the motors facing out to the ported chamber that will be right around 8 after its port bracing and subs. the access panel is kinda funky but was thinking 36x12 3/4 plexi with a 3/4 inch piece of mdf as a mounting surface on either side. that would give me some room to replace subs if need be.

the ap3k has been doing its thing in my truck for a few yrs, about 4 if that matters. I have only used it at 4 ohms, but at that ive seen all the claims and believe it was close to the 2k claims. i wont say its high sq but it does a decent job and was cheaper than anything else when i got it.

rosshimself13
08-08-2013, 03:45 AM
265441842654418526544186

rosshimself13
08-10-2013, 12:24 AM
The qtc shows to be around .79 not the desired .7 being tuned to 45 I think it'll turn out ok. :hide: I bought 3 sheets of mdf today.

Also if anyone cares I'll try to take lots of pictures. This is my first build of anything close to this magnitude it might be a total failure.

bbeljefe
08-10-2013, 12:44 AM
If the specs on the woofers you have are anything like the IDMAX 15, they have an EBP of about ~39, which is great for sealed and 4th order. If they're like the IDQ, then EBP is ~69, which is a little better suited for ported and 6th order.

Of course, being a custom built sub, you'd have to have access to a DATS or you'd have to spend some time pulling the TS numbers manually in order to know for sure.

As for the box, the 1:2 ratio is fine and the tuning sounds fine too, although I'd want to tune it closer to Fs.... whatever that may be. However, being a 15, I would assume it's below 30hz, so I'd want to be around 32-4hz. But that's subjective, unless the speakers won't perform well in that box at that tuning. Again...need TS.

Bracing with " all thread is fine for short dimensions but if you get past 20" or so, I'd be afraid the " would be too thin to resist inward pressures. For longer braces, I'd use 3/4" and the biggest fender washers I could find. The last thing you want is a brace in the box resonating like a guitar string.

rosshimself13
08-10-2013, 01:27 AM
Being so rare t/s parameters aren't available image dynamics couldn't tell me anything but I'm gonna jump head first into this and if it doesn't work then I learned an expensive lesson.

bbeljefe
08-10-2013, 01:33 AM
You could always build a 4th order for one of them and test it's performance before jumping head first into a complex build. Surely you could sell a good test box to someone for enough to at least pay for materials.

Or, you could ask around and see if someone in your area has a DATS unit. I'd be happy to test them for you but shipping woofers back and forth for pulling parameters would be too risky, not to mention the freight costs.

rosshimself13
08-11-2013, 09:03 PM
Oh and most bracing will be mdf, just going to do 4 pieces of all thread from top to bottom so ~16" that will hold the box to the truck well and effectively brace it correct? I mean yes it's kinda heavy but it's tied to the bed using utili-track