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Old 16th May 2007, 03:09 PM   #1
diyAudio Member
Join Date: May 2007
Default Compact Sub Suggestions

Hi All,
I just finished installing the following into my 98 Honda Accord Coupe.

HU: Pioneer DEH-P3900MP - Tweaking and management (learning) will take a while to get it all sunk in but a great unit.

Speakers: JBL P650C These JBL's are marvelous. Hated to think of hacking holes into my door panels so opted to replace the OEM tweeters on the dash. Maybe I just don't realize how much better they'd sound elsewhere but I think they're great right there. I'm running the mids in the doors off a 40Watt X 4 Alpine and left the rear deck 6X9 pioneers on the HU. Ran cabling for back channels from the sub outs on the HU. I plan to bridge them and run a small sub at 100 watts. Thinking about a passive 6" Bazooka tube but need more input. I'm old n gray so don't need bloody ear subs, just some kick in the shorts now n then. But, I want to save space, as much as possible. Since I grew up when we ALL drove American Iron with tons of room and huge gas tanks I've really downsized. I'm quite capable of building my own if necessary so figured I'd pop the questions here first.

Suggestions anyone...
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Old 17th May 2007, 10:57 PM   #2
MadMutt is offline MadMutt  Australia
diyAudio Member
Join Date: Nov 2006
First option for the least space used would be a Infinite Baffle sub.

Otherwise your just going to have to get specs of different subs and play with numbers in winisd.

I'd be suggesting 8", maybe jl audio, infinity, boston, ads.
Theres sure to be others but it's a starting piont.

See what area of the boot is used least and design a box/tube/enclosure for there.
Dont forget the box does not have to be regular shaped.

I'm using a single 8" in a dog leg shaped 18ltr ported where the jack used to go in the side of the boot.
The jack now resides with the spare.
I have lost no room whatsoever..
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Old 19th May 2007, 12:52 PM   #3
diyAudio Member
Join Date: May 2007
Hi Madd,
Thanks for the info, first I saw of winisd... Need to dig into that some I see. 8" would seem a good direction to start for me since I really don't think I need all that much bottom end, just some.... The JBL P650C's are simply awesome by themselves and a decent sub would make me want to move into the car!

What material did you use to build your box?
I'm thinking left side near top of the "boot" on my Accord.
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Old 19th May 2007, 06:28 PM   #4
mongo22 is offline mongo22  United States
diyAudio Member
Join Date: Apr 2007
Take a look at for the Dayton RSS265HO-4 10" High Output Subwoofer. These are highly rated, reasonably priced and can fit in a very small space. If I remember right, an ideal box for a single Dayton 10" HO would be about .7 cu ft ported, tuned to around 30hz. Thats a box with outside dimensions of aprox 12x12x13" using 3/4" MDF material. You can also use a box of similar size only sealed but you would need more then 100watts to run it properly because the efficiency goes way down. They will have all of the Thiele-Small parameters listed there so you can model a box on the computer for the driver.

As for bulding a box, most use 3/4 inch MDF (medium density fiberboard) that can be found at any Home Depot or Lowes. Dont confuse this with particle board or chip board. Thats the stuff that looks like its made of grainy sawdust. MDF is much stronger, more dense, and wont crumble apart when you put screws or nails in it. Even 3/4 inch marine grade plywood works very well.

Also a great place to ask this type of question is at The people that hang out there are very knowledgable and mostly not into the "boom" type systems. They are much more into high fidelity and high value!
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Old 19th May 2007, 11:05 PM   #5
MadMutt is offline MadMutt  Australia
diyAudio Member
Join Date: Nov 2006
I used 12mm ply with several bracing 'sticks' on the biggest areas.
Because it went in were the jack was, I used the bolt that holds the jack to secure the box.
When I sell the car, the box comes out, original trim goes in, and nobody will ever know......
Small hole you can see is for the 'speakon' connector.
It sits at the top of the wheel well, behind the trim.

This link will be of interest to you then ---->

It's info on how add a linkwitz transform function into winisd.
My experience has been that the moldeled response is within 1-2 db of the real thing.

Here's another link that might be of interest when tailoring your box -->
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