Summary: I purchased this sub on sale for $125. The downside of the sub is that there is no adjustment for the frequency. You only have a gain control for the volume. Therefore, you have to adjust the frequency with your receiver. I am using the sub in my garage so I have a basic receiver out there with bass and treble adjustments. I think if you had a crossover on it or some other way of adjusting the frequency, it would sound a lot better. I think the sub sounds good.
Summary: I recently purchased this on a Woot deal. I wasn't sure what to expect. I used it to compliment my Pinnacle QP9 sound bar, which is connected to my Onkyo NR626 receiver.(All purchased from Woot!) The item was well packaged, which appears to be a common thing with Pinnacle. I used the cord provided to plug into my receiver and set-up the receiver to see it. I went from having a nice sound system to having an AMAZING sound. I hear things I've never heard before in shows.
Summary: This sub-woofer has very natural and powerful sound. It works perfectly with my Denon 991 (3311) receiver. I set the cross over frequency to 55 on the receiver, frequency adjust (on the speaker) to about 100, and the gain to a little bit lower than half. Now I can hear all the low sounds that I could not hear before. The only small problem is that it does not have a on/off switch, and it creates a very soft humming sound when it is not in use.
Summary: This is one of the better bangs for the buck on the market. At the time I purchased this... it would have cost me $500.00 if I had just strolled into Walmart or where ever, but instead costs about $280.00 if I member right (total). I've had a Pinnacle five speaker package for years, (which consisted of a AC550, a pair of AC650's and a pair of AC450's). I always wanted a sub and now have one.
Summary: this sub Shakes the room in deep heavy bass. the phase control is a nice touch as i like to change it depending on what kind of music i listen to. i got this as a gift for my dorm room........so strong you can feel the vibrations in your body.