I purchased one of these a few years ago and it was re-branded Chinese junk. About two years of use resulted in a blown amp. The sound when it did work wasn't great either.
I bought a German built 250 watt plate amp and the legendary Shiva subwoofer. I added additional bracing to the box, more stuffing. Put a sheet of 1" MDF on the bottom to fit the smaller Shiva and enlarged the amp hole as the German Amp was bigger. What I ended up with was an awesome DIY sub that I am still using. So yeah, the Dahlquist PDQ-1500 is great as a home theater subwoofer box.
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