Home Subwoofer Project: The Bottomless Subwoofer

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The "Bottomless" subwoofer.

I don't have a lot of money so I used an end table from work that was to be thrown away as a cabinet for this sub. Total volume was 7.2 cubic feet. Project came in at less than $400 and I'm very pleased, very pleased. Someone help me out though. I left this thing without a bottom so when it sits on the floor, it is sealed on the rug but how does this affect the performance acoustically? Would this be "coupled" to the floor producing a partial infinite baffle if that makes sense? Thanks for reading.

The "Bottomless" subwoofer.

Designer: MattCero

Project Time1-8 hours
Project Complexityamateur
Project Cost$100-$500
  

Driver Selection

Dayton Audio UM12-22 12" Ultimax DVC Subwoofer 2 ohm Per Coil. http://www.parts-express.com/pe/showdetl.cfm?partnumber=295-512

Enclosure Design

The enclosure was already built as I scavenged an end table from my work that was to be thrown away. Total volume was 7.4 cubic feet. Decided to go with ported for obvious reasons.

Amplifier/Crossover Configuration

Bash 300W Digital Subwoofer Plate Amplifier

Enclosure Assembly

The enclosure was already built as I scavenged an end table from my work that was to be thrown away. Total volume was 7.4 cubic feet. Decided to go with ported for obvious reasons. I did make a 4" port and used PVC from Home Depot along with a

Conclusion

Wow, this thing rocks not just the living room but the entire house. My house has wood floors and is on a quiet dead end street. I was truly concerned that my neighbors might "feel" it as well. I'll ask them and update this if I can.

About The Designer

I'm a Purdue grad, Mech. Eng. and former Navy Pilot and currently am in the IT industry. I love delving into projects and not spending a ton of money. I buy speakers from Craig's List, gut them and put in better components from PE. I moved into this house and out of an apartment where I could not use a subwoofer. So, it's high time for this project.

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