The specs of the sub look nice, however in the user manual the company states "This subwoofer is not designed to perform continually at a high volume and should not be used for parties orevents. It should be used for its intended purpose only, which is listening to audio at a comfortable volume.This can include recreational activities like listening to background music or amplifying the sound from yourtelevision.".
Did you have any problem when playing your Devine RX-10SA for hours at a decent volume level?