An M-10 has (4) 6 x 9 oval cone speakers and (4) tweeters. There are a total of 10 speakers in each cabinet. The M-10 C is a column configuration, a tall cabinets that was easily beam mounted vs. the stand M-10 that was a rectangular configuration. These speakers were designed to be reflected off of a solid surface. There are several built in controls for the tweeters and it is important to regulate these for optimum performance. Cathy Blanchard ************* On the Frog Music Press Website - Playing MIDI Live at the Rodgers Organ & Using the PR-300, two guides to mastering MIDI. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgersmem.html