Flat Panel Subwoofer

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Project by mandmj posted 09-22-2011 03:51 AM 1628 views 3 times favorited 6 comments Add to Favorites Watch

This is my first attempt at building a subwoofer. It has a 3/4” MDF carcass (basically a 14” inside dimension cube) w/ oak plywood rail/style overlays and a 1/4” plywood flat panel fitted into rabbits on the rails/styles. The panels/overlays/etc are all glued in place to prevent rattling. Cove moulding makes up the corners and panel edges. Finish is cherry stain w/ 3 coats of semigloss poly. The box itself was build almost entirely out of scraps I had lying around the garage, and cost less then $15 to build.

The speaker is a Rockford-Fosgate 12” 4ohm unit I picked up at a going out of buisness sale in town. The amp is an Apex Senior. The spikes are a little short and will need to be extended to be used on a carpeted surface, but for a hard surface they are adequate.

The appearance of the unit is ok, but has plenty of defects when examined closely. The sound of the unit has actually been a pleasant suprise thus far, especially given the cost to put it together.

6 comments so far

View Jim Jakosh's profile

Jim Jakosh

20285 posts in 3070 days

#1 posted 09-22-2011 04:29 AM

Nice cabinet. You’d never know what is holds!!! I hope the joints are tight to withstand all the vibration it will be getting!!!

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Scott Oldre's profile

Scott Oldre

1039 posts in 3396 days

#2 posted 09-22-2011 02:12 PM

Nice Job. I like the look of it and it would fit nicely into a group of other wooden theater speakers, which of course you can’t find in a store. I’ll have to do a little research and see if I can do one myself.

-- Scott, Irmo SC

View SWM's profile


94 posts in 3023 days

#3 posted 09-22-2011 03:09 PM

Very Cool. I’ve wanted to build my own speaker/sub enclosures for years. I’ll just have to live vicariously through your post!

I’ve always wondered where I could come up with an A/C amplifier that would fit neatly on a sub enclosure. Could I ask where you picked up the Apex?

-- Working on a retirement hobby, only 30 more years to practice!

View mandmj's profile


7 posts in 3149 days

#4 posted 09-22-2011 07:44 PM

Here is the amp link:

View Bertha's profile


13521 posts in 2658 days

#5 posted 09-22-2011 07:57 PM

It’s a handsome little guy. I’m allowed to say “little” b/c I’ve got a velodyne 18, lol.
I’m glad to see more people building speakers. I’ve build my share but it’s been a long time.
This one looks like it’s built like a tank.

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

View bunkie's profile


412 posts in 3112 days

#6 posted 09-22-2011 08:22 PM

Another great source for subwoofers and amps is

I’m currently working on a floorstanding speaker kit I bought from them called the Atrix. This is a bit of a departure for me as I usually design my own systems. I’m using paper-backed veneer for the very first time and I have to say that it’s a joy to use. I’ll try to post some pictures this weekend.

Speaker building is fun and very rewarding. Nice job on the sub, Mandmj!

-- Altruism is, ultimately, self-serving

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