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

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!

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!