XTZ 99W12.16 vs. JAMO 650 vs. BK Electronics XLS 300

Hi everybody,

I am in search of a subwoofer and am in principal doubting between 3 models:

1.ZTZ 99W12.16 from Sweden (12”, 300 RMS)
2.Jamo 650 (12”, 300 RMS) from Denmark
3.BK electronics, XLS300 /PR UK

You may have guessed that budget is aprox 500€.
Any experience and comments of any user of these is most welcome. I have read some good reviews about them but not enough to make a final decision.

It is meant to complete the following setup: YAMAHA AV Receiver RX-V3800, Focal Chorus Jm Lab 716 V, Jm Lab 807 V, source is original music/film files stored in a hard disk and played for music through aLogitech Squeeze Box playing almost exclusively FLAC music or SACD files of all genres (with bit more emphasis on Classical, Rock, CHillout) but generally at medium sound levels. Looking for a clear bass subwoofer but not too dry. Focal Chorus speakers provide me great pleasure in medium and high frequencies with a clear, spacious and crispy sound but the bass is not as clearly defined. My room is about 6 x 4 m x 2,50 high, with marble flooring, little upholstery. I use the system also for movies but I don’t aim at playing movies nor loud or I am not looking for earthquaking effects but rather an involving high quality, spacious, deep yet clearly defined sound.

I believe DF subwoofer is not ideal for my room as it may have some too high low frequencies reverberation. Also any comments on Sealed (Jamo 650, BK XLS 300)boxed sub vs. Reflex (XTZ) is welcome.

You may write your comments and or experience in any of the following language: English, French, German or Spanish whatever you feel most comfortable with.ç

Thank you for your comments and suggestions. Sunny regards from HOT Barcelona!