need help with sub box in a 92 caddy deville
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=5843
Printed Date: June 08, 2025 at 10:58 PM
Topic: need help with sub box in a 92 caddy deville
Posted By: ceeniser
Subject: need help with sub box in a 92 caddy deville
Date Posted: November 24, 2002 at 10:25 PM
I have a 92 cadillac sedan deville. Right now I have 2 rockford 12" hx2 in a sealed box. I had to cut an opening in the middle console of the rear seats so the bass can pass from the trunk where I have my box, because there is a metal wall behind my back seats. I am not satisfied with my bass..Can some one give me a better idea on should I use a ported box? And if yes, which way should I face the boxx in the trunk? That is another question- why does everyone face there sub box towards the rear of the car???Mine is facing the rear of the car. I have a rockford 800@4 amp. I am getting a 1500@1 channel amp soon. PLEASE give me a solution. I don't care to build a new box!!!
Replies:
Posted By: chriswallace187
Date Posted: November 24, 2002 at 11:37 PM
I've put a 350 watt subwoofer amp in a '92 deville before and got outstanding bass without doing any hacking on the backseat. What other components do you have in the system? ------------- C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: ceeniser
Date Posted: November 25, 2002 at 6:46 PM
I have a 1.2 farad cap for my sub amp (rockford 800@4 channel briged) I have a jbl 400 watt amp for my 2 6x9's in the back dash and for my 2 door speakers. I also have 2 4 inch speakers in my front dash connected to my radio.
Posted By: matrix
Date Posted: November 25, 2002 at 7:17 PM
Your in luck, I have built many boxes for your car. What I would would do if the car came to my shop I would bulid a ported enclosure. I would allow for 2 to 2.5 cubic feet per woofer and tune it around 36 hertz. Tuning any lower you would need a subsonic filter. Porting diameter would be 4 inches and I would place the port on the same face as the drivers. Port lengh I will post later(dont have diagram with me). Face the box toward the trunk(port and drivers) because bass takes time to develope roughly fifteen feet to fully develope. Now the woofers will be more efficient and need less power for the more bass
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matrixman
Posted By: ceeniser
Date Posted: November 25, 2002 at 7:50 PM
matrix That's great info on the sub box. I was ready to build a ported box and now i am. Iam desperate because I am going to build a new box on thursday( thanksgiving day) and I was dying to know why the sub boxes are always pointed toward the rear of the car. You answered my question. Don'tforget to let me know on the length of the port. The rock ford manual says 4 inch diameter and 10 inches in length.
Posted By: matrix
Date Posted: November 25, 2002 at 7:56 PM
The lengh depends on the volume of the box and what you want to tune it to. I will post them after work tomorrow at around 6:30 ------------- matrixman
Posted By: ceeniser
Date Posted: November 25, 2002 at 8:01 PM
hey matrixman, I'll be on the look out .I am looking for some real air moving bass.
Posted By: matrix
Date Posted: November 25, 2002 at 8:02 PM
Since those woofers have a large throw that is exactly what you will get. I will give you the exact specs tomorrow for the whole box
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matrixman
Posted By: ceeniser
Date Posted: November 25, 2002 at 8:37 PM
matrix What do you think of a dual reflex bandpass enclosure
Posted By: matrix
Date Posted: November 25, 2002 at 8:45 PM
Dont try to build without term pro or term pak, or some type of software. I say this because with out any experience with type of box you may expereince flaws when trying to build it. These flaws will result in woofer damage which can be costly.
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matrixman
Posted By: ceeniser
Date Posted: November 25, 2002 at 8:50 PM
all right matrixman I'll wait untill tomorrow for the specs on your ported box. One more question...When I change my amp to a fockford1500.1 amp next month will i have to change the box design or willit just give me thew the more spl bass that i am looking for
Posted By: matrix
Date Posted: November 25, 2002 at 8:56 PM
To much power is never that bad. It should clean up your bass at all levels ------------- matrixman
Posted By: ceeniser
Date Posted: November 25, 2002 at 9:40 PM
Beautiful...Beautiful.
Posted By: ceeniser
Date Posted: November 26, 2002 at 9:47 PM
can any one else out there give a brother a bone to chew on
Posted By: ceeniser
Date Posted: November 26, 2002 at 10:10 PM
question about my subs... I have the rockford punch hx2 dvc...loking in the manual of the speakers, I found that it says, "nominal impedance (ohms)..............4(2) what exactly does that mean and how can I wire my two subs to give me the most power. I would like for some one to give me the wiring configs for a 2 channel amp and also for a 1 channel amp. That would be greatly appreciated
Posted By: ceeniser
Date Posted: November 26, 2002 at 10:17 PM
one more question : how is it that 2 , 4ohm speakers can be wired to make 1 ohm and 2, 2ohm speakers can only be wired to make 2 ohms???
Posted By: bberman1
Date Posted: November 27, 2002 at 12:19 PM
You can go to Audiobahn https://www.audiobahninc.com toward the top right click on tech support, and then scroll down and you will see the wiring diagrams. If you wire them in Parallel you get 1 ohm, Series- parallel 4 ohm, series 16 ohm. So you will get the most power wiring them in parallel but the amp you have is 2 ohm stable and not 1 ohm. You will have to wire them in series-parallel so you get a 4ohm load.
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