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PostPosted: 26 Jul 2017, 21:35 
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Joined: 20 Mar 2017, 22:39
Posts: 21
I have always loved passive radiators, so I thought I would finally do a build log along with all the parts needed. Thanks to Parts Express, I am able to bring one of these Passive Radiator Builds to life. My goal was to make a small subwoofer that would still have high spl, for a smaller room all while keeping the cost of the major parts under $200. As I looked around, I haven't found many great subs in that price range, so I thought DIY work might give the best bang for the buck. Here's a list of all the parts chosen for this project along with links:

https://www.youtube.com/watch?v=MoNAu0QQMGU

Dayton Audio DCS205-4 8" Classic Subwoofer 4 Ohm
2 - Dayton Audio SD215-PR 8" Passive Radiator
Dayton Audio SA100 100W Subwoofer Plate Amplifier
Harrison Labs FMOD Inline Crossover Pair 30 Hz High Pass RCA

I didn't have a separate DSP, so I had to go with an FMOD for the High pass to protect the woofer from over excursion. I did test it, and it was an issue. Although, if you have a DSP you would not need the FMOD. The total cost with the FMod is $190.

The Enclosure is a very small footprint sitting at a 14" cube with 3/4" MDF or a 13.5" cube using 1/2" MDF. So it is a great footprint for a small room.

When I get home later I'll post the theoretical response before room gain via WinISD. I will say, I have tested this by playing test tones through it and it blew me away. I was very pleased with the SPL this thing can put put out, especially for it's size.

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PostPosted: 01 Aug 2017, 21:51 
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Joined: 28 May 2008, 21:53
Posts: 4546
Location: Winnipeg, CANADA
Nice small sub. The PR look fun.

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