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Illustrious Member Admin
Joined: 3 years ago
Posts: 988
07/01/2020 5:07 am  


Stereo Integrity used to sell a really great alternative subwoofer (HT18) to the Ultimax 18.  However, they did not sell well enough, even at their bargain of a price.  So the owner discontinued them. If you can find some used for cheap, then I would say go for it.  If I recall correctly, they were cheaper than the Ultimax to begin with, but I don't think you'll find many out there anymore.  

Reputable Member Registered
Joined: 1 year ago
Posts: 448
08/01/2020 5:06 pm  

Here's a possibility:

Dayton Audio RSS265HF-8 10" Reference HF Subwoofer 8 Ohm from Parts Express and Yung SD300-6 300W Class D Subwoofer Plate Amplifier Module with 6dB at 30 Hz, also from Parts Express. Here's an optimized box.

RSS265HF 8

Maybe make a reading bench out of it? 

The 3" port was just a quick eyeball measure to keep velocity down. Smaller ports will be shorter, just be realistic with the amount of air the woofer can move.


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