Anyone hear Dynaudio subwoofers

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 

jafant - thanks. So no Dynaudio sub experience ? How does one service an old REL sub in North America, outside of a third party speaker repair shop ?

I went to see an advertised mint condition Seaton Submersive with the intention of buying. When I got there the owner revealed it had the smaller amp in it first, and was clipping all the time due to his listening habits.  So he had the smaller Seaton amp exchanged for the larger amp. Who knows the damage caused to the driver coil by the smaller amp.

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.