Anyone hear Dynaudio subwoofers


Has anyone had any experience with a Dynaudio sub in a 2 channel system for music, not ht? If so, would love your reactions.
128x128swampwalker
10 year thread bump Swampwalker 8^0

Found Two - New Old Stock BM12s in a Studio. never out of the boxes.

Specs

18hz - 250hz.

12" woofer
Phase adjustment in 0° / 90° / 180° / 270°
Remote Control, Subwoofer level control
Adjustment of crossover frequency ranges
Storing and recalling presets
Low frequency extension adjustment
250 W amp

I think the amp is class A/B by the size of the heat sinks. No info available on it.  They would only be used for 60hz and down 2 channel music in my second room. They are a good price; are they worth pursuing.. or should I move on? 

thanks in advance for any replies.
Cheers 
Thanks, CT for thinking of me.  As of now, I am running active bi-amplified OB speakers w 2, 10" woofers on each baffle, driven my 200 wpc crown class 2 amp.  Haven't cheked it out w pipe organ, but no sub needed for any other use, IMO.  But I appreciate the time you put in to your response. 
Another vote for REL. IME, these are the most musical and best "sub" in the market. Add easily integrates into any system.
Keep me posted and Happy Listening!
Missioncoonery. Jafant

Can you tell me "Why" from strictly a 2 Channel music - pure bass, lowest octave music perspective. No low Movie/HT bass needed here. Models of each you had would help. My Room 2 is a dedicated space, 20 x 24 irregular. I can put them (subs) anywhere, set it and forget it. From very limited info online; owners are a happy lot, but did read some had issues with losing the small Dynaudio sub remote, and its the only way to configure them. The fellow that owns that studio has used them for years and is not happy with the newer current line. Says cost cuts are obvious with lighter boxes.