JoeMuc2009 wrote: > Actually it's pure physics. If you push one speaker in carefully in a > unit that has no power connected, the other will pop out nearly the same > amount. It's an air-tight enclosure where the bass woofers are the only > moving parts connecting the inside of the case to the surrounding air. > This also means, if one bass moves, e.g. from my sample that plays a > frequency just on one side, the other base is passively moving along > with that. And thereby causing sound, even though it is not driven by > anything but the vacuum and pressure generated by the bass on the other > side. That makes it impossible to check both speakers separately as long > as the case with its air-tight seal is opened. > A "mono" bass where both channels are exactly in phase might cancel > itself out because both speakers try to push simultaneously out which > creates a stronger internal vacuum, and pull in simultaneously creates > the respective amount of pressure. This makes bass movement considerably > hard. That's where they do some DSP trickery, I think. Putting the bass > just a little out of phase on one side might resolve this for good, > without a noticeable effect on what your ears perceive. > All this might be completely wrong but if it isn't, it makes the Boom a > true engineering marvel.
Have you seen this? http://wiki.slimdevices.com/uploads/a/ad/Logitech_Squeezebox_Boom_Audio_Design.pdf 23993 +-------------------------------------------------------------------+ |Filename: pic10-11-2017-17.57.41.jpg | |Download: http://forums.slimdevices.com/attachment.php?attachmentid=23993| +-------------------------------------------------------------------+ *Study/Server - LMS 7.9.1 - *Raspberry Pi3/Pi screen/HiFiBerry DAC+/piCorePlayer 3.22/jivelite, 25K library on WDMyCloud, cache and playlists on a USB stick (formatted ntfs). *Lounge* - RPi 2/Max2Play > HiFiBerry DIGI+ > AudioEngine DAC1 > AVI DM5 *Dining Room* - Boom *Garage* - Radio *In car* - LMS 7.9.1 > RPi3/Max2Play/Access Point plugin > HiFiBerry DAC+ > car's hifi (files on a 2TB portable USB drive) *Spares* - 1xTouch, 1xSB3 ------------------------------------------------------------------------ kidstypike's Profile: http://forums.slimdevices.com/member.php?userid=10436 View this thread: http://forums.slimdevices.com/showthread.php?t=107832 _______________________________________________ Boom mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/boom
