![](http://i14.photobucket.com/albums/a330/superribbit/SVS/aIMG_4953.jpg)
![](http://i14.photobucket.com/albums/a330/superribbit/SVS/aIMG_4949.jpg)
dual opposed woofers
![](http://i14.photobucket.com/albums/a330/superribbit/SVS/aIMG_4948.jpg)
the massive MTS looking petite vs the Ultra
![](http://i14.photobucket.com/albums/a330/superribbit/SVS/aIMG_4947.jpg)
so with this last picture, i can conclude that the Ultra never was the replacement for the M series.
S=Small
M=Medium
L=Large but never released
Ultra=new naming system.
so kung may papalit man sa M, it might be called Plus (nothing is in the known pipeline)