Superb! Best bass I have ever heard in this pricerange! Goes so low i just need to sit down and feel those goosebumps crawling all over my back! Love it!

What to say....Exellent finitures great sound so happy of my purchase. Thanks XTZ

My old Subwoofer Teufel from the Theater 3 Series (M3100) has unfortunately once again broken and I was tired to send it in again for repair because I was never really happy with it. Somehow I always felt the sound to be unprecise and muffled. So I ordered the 12.17. After calibration with the Audyssey mic and manual readjustment Im finally satisfied with the sound of my system. An accurate and dry bass. However it took me a while to play around with the settings of my Denon AV Receiver and also shut off the dynamic equalizer because the bass initially quite boomed. Now the subwoofer makes listening to music a real joy and movies have a perfect cinema sound. Congrats XTZ!

A great and very powerful subwoofer. The bass is accurately reproduced. Fits great with my stereo system with two large floor standing speakers. The 12.17 is perfect as addition for movies to provide the deepest bass which the floorstanders cannot provide.

The 12.17 creates a great bass performance in my living room (40sqm). Before that XTZ woofer I had a woofer from Harmann Kardon but the XTZ is much more powerfull and also precise. It is also easier to integrate the 12.17 into a surround system harmonically. I put the crosssover frequency at ma AV receiver to 80Hz and at the subwoofer used the bypass of the own crossover. I use the EQ 2 to have a little more punchy bass which I really appreciate.

Large black and powerful! Actually theres not much more to say about my 12.17. I operate the subwoofer with a Yamaha Receiver which is a good combination. Super price / performance ratio! Highly recommended!

The XTZ 12.17 was acquired in exchange for a JBL ES250P since it began to whistle. The shipping was really fast! The sub can be very well fine tuned unlike my JBL which sounded already very good. I especially liked the possibilities to change the sound by using the bass reflex plugs. So I use the 12.17 in closed mode since I love that precision and still have a lot of deep bass. The optics has also convinced me 100%: I love the design and also the excellent finish! Just one thing: The front cover was very hard to mount the first time so I first thought there was something wrong with it. The XTZ service told me that it was hard to mount depending on temperature and humidity the first time. This is true it is much easier later on. Great product!

Great product! It suites seamlessly with pair of KEL LS50 Wireless and completes them in the laking sub bass. The 12.17 is set in its reference volume cutoff at 40 Hz reference EQ and completely sealed. You know that this is a great product since the bass sounds different in every recording. Recommended!

The sound of the XTZ 12.17 is excellent. Wonderful bass at its best! No jingle buzz or rattle. There are many possible adjustments but still they are very easy to handle. In addition to the rich bass sound we also liked the auto on/off function. Summarized the sub has an excellent finish and the sound is just pure enjoyment. We would buy it again! Therefore we can all only highly recommend the 12.17.

Really a good and powerful subwoofer with good workmanship. The bass power is almost too much for a rental apartment with normal roomsize (20-30qm). For the price of 645 € an absolute purchase recommendation.