Passive Radiator CSS SDX10 Design and Build

[EngineerNate]

I have had an SDX10 for ages that started life in my car. I haven't had a car system for ages so it's sat in my shop in a sealed car box for a long time. I finally have a little space for a system so I'm giving it a proper home.

After corresponding with Dan at CSS I decided on a dual passive Radiator design at 2.5cuft and 9 washers on the PRs, giving an F3 of 19hz.

I bought 4X of their closeout PRs and a second SDX10 so the first wouldn't be so lonely.

I used CAD to design the enclosure and take volume measurements. They will double as speaker stands, and are some point I'll make a third to help cancel out room modes.

The boxes are golden ratioed, because why not!

I have a few free days before Thanksgiving I'm hoping to use for assembly.

Cheers
Nate

 

[Curvature]

Nice driver and project.

https://audioxpress.com/article/test-bench-the-sdx10-home-audio-woofer-from-css-audio

 

[EngineerNate]

Nice driver and project.

https://audioxpress.com/article/test-bench-the-sdx10-home-audio-woofer-from-css-audio

I think several other subwoofer drivers probably equal it at this point for pure bass duty, but I already had one purchased back when XBL-2 was the new hotness, so the barrier to entry to getting another was lower than with another driver.

That said, it's ability to play cleanly very very high for a subbass driver opens up interesting possibilities for using higher crossover points to reduce distortion in my main speakers (since I can run the two in stereo and use them as speaker stands, eliminating issues with localization).

If I build a third sub, I may choose a larger driver or do a similar looking cabinet with two drivers in push pull, just to keep life interesting.

Once I've gone through a full build on these and verify the flat pack fitment, I will post step and DXF files for anyone who wants to build a copy.

 

[ThatSoundsGood]

Nice! My living room sub is a CSS 10" with dual PR's and I love it.