Hi.......... A 900 A is an early Mikasco console. They can sound very fine, but they are difficult to work with. Get someone who knows. One who has done them before. As to the speakers, an M-10 C is a column version of the venerable M-10. As to the Walker B-2, that is a large cabinet. You better measure it before you build the chambers. It is a ported bass cabinet that likes to bounce off a wall. If you have any questions, feel free to email me privately and we can get deeper into this. Bill Hesterman ************* 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