02_Limited

HOLY. F%#& .

I'm gonna say you have a bit of an interior rattling problem, just maybe?

4rx

lets just say, it does rattling every inch of my truck.

broke the little glove box above of the rearview mirror. what's next? maybe dome light fall down. lol

some people are into 4x4ing, i am just into loud music. different hobbies.

toylocost

Well this is the best I can come up with...

I guess they dont make them anymore but I got them brand new like 4 months ago they are MA Audo - MA15D4. This is all the specs I can find on them...
-400 watts RMS
-800 watts Max
-180oz. Single magnet
-Mounting Depth: 7"
-Mounting Diameter: 14.1"
-Copper Wound Voice Coils
-Rubber Sealant Gasket
-Dual 4 Ohm Voice Coils
-Patented Thermo-Cooling Motor Structure
-2" Hi-Temp Kapton Voice Coil Structure
-New Patented Chrome Die-Cast Basket
-Double Stacked Strontium Magnets
-Heavy Duty Non-Pressed Paper Cone
-Platinum Plated Block Terminals
-High Profile Rubber Surround

The one of their newer comparable subs has specs like this...
15" XQ Series Subwoofer...
-Subwoofer Size 15"
-Voice Coil(s) Dual (2 voice coils)
-Impedance (per voice coil) 4 ohms
-Peak Power Handling 900 watts
-RMS Power Handling 450 watts
-Woofer Surround Rubber
-Woofer Composition Paper
-Sealed Box Volume 1.25 - 2.00 cubic feet
-Ported Box Volume 3.25 cubic feet
-Sensitivity 90 dB
-Frequency Response N/A
-Xmax (millimeters) 14 mm

I assume these box volumes would be sufficient for my set? How did you design your box? I've never seen a common chamber box before. I would like to learn more. Did you use a program?

gary96360

4rx arent your subs underpowered with them being 2,000 rms each with a 2,400 watt amp. also is your amp 2,400 rms? if its peak then the subs are really underpowered. but i bet they pound.

4rx

sorry i still can't help with that specs. what i need is thiele small parameters for the ma audio sub. The thiele/small parameters are Qts, Qes, Qms, Vas, Fs, rms, xmax, and db. You can download the box design program from winisd website. google winisd and thiele/small parameters if you want to learn more about it.

yes, they are seriously underpowered but they still get loud as $#!+. I'm investing for a 4000watts amp and plus upgrade electrical system. peak watts mean nothing. what you want is to look at real specs of the amp. the orion 15h2 rms is 2000watts. I remember rms stand for "recommened manufacturer s...", I can't remember what s stand for tho. the 15h2 can actually handle up to 2,500watts from what i've heard. some subs can handle more than actual rms, some aren't.




tip: do not ever run the power wire with rca because it cause noise. i have the power wire in the drivers side and rca in the passengers side.

toylocost

First of all sorry for jacking your thread, if you want me to delete this I will.

Ok well I did some research and this is what I came up with. I found the manual for the subs buried in paper work (ok car parts in the garage) and this is what it says…


I downloaded WinISD (thanks for pointing it out) and entered the parameters of the sub into it. I’m %80 sure I did it right but I don’t know for sure.

The manual says it wants 4.5 cubic feet and 3 four inch ports tuned to 34hz. That’s 4.5 cubes per sub, there’s no way I’m going to build a 9 cubic foot box lol. I looked at their other 15s and this is the only one that wants 4.5 cubes all the others wanted like 2.5 – 3. Do I really need to go that big?

Here are a couple screen shots of WinISD. Really I don’t quite know what I’m looking at, you are welcome to play around with it if you are bored. Lol

4rx

don't delete it. well, it look like manufacturer enclosure recommened for the ma 15D4 is dead right. you would have to build between 8-10cubes(10cubes is even better) for your ma audio subs. let me know what you want to do with it. maybe you better stick with the sealed box.. or you want to be crazy, go with ported box lol. i built a small box for my subs due to high parameters Q's in the 0.7's. your subs parameters Q's are low, it like larger box. the tuning freq between 30 to 40hz is the best for daily groundpounders. it ain't good if you tune below 30hz or above 40hz.

toylocost

Well if yours is six cubes theres no way I'm doing ten. Unless I get really bored one day. I think I should just make a bigger sealed box then. I listen to rock mostly but I turn it to rap/hip-hop at stoplights just to annoy people. lol

toylocost

So the common chamber you just build it twice the size with no divider and they will be okay? I'm running them on 2 channels I dont know if that makes a difference.

4runnit

well id love to post pics but i dopped my camera in the river
Anyways, here goes:
-Headunit's a Kenwood KDC-X692
-Rockford Fosgate 2,000watt amp
-2 Eclipse 12's in the back
its not super loud but its perfect for me. saving up for new door speakers soon.

toylocost

Sweet. Whats the RMS power for that amp? Or the model number?

4rx

yeah, thats totally fine

4runnit, that sucks. is it a rf T2000.1? I've heard good things about rf '08 models amps. bet it hits nicely.

data

Old school stuff here....

Apline CDA-7894
Kicker KX600.1
Image Dynamics IDQ 12" sealed enclosure

I mouted the sub control right below the switches for my rear lights.

Gokumono

I like that sub control you got in the front.

88alltrac

FYI. rms stands for root mean square. kinda like an average amplitude.
My system is sweet.
Cheap sony head unit and stock speakers. It rocks.

4rx

you're actually right. i had to google'd it. haha get a cheap 10" and amp that will satisfy you.

88alltrac

someday. right now i am focusing my money on maintenance and school. engineering, that is why i know what rms is.

toylocost

hey my major is engineering too.

4rx

toylocost, how come you didn't correct me for rms?

toylocost

lol. I isnt too far along in my learnin. Second semester in college and first for engineering.