Hey all:I think he meant that even different 15" speakers will or will not work well indifferent cabinets. The volume of the cab and port dimensions are determined by the characteristics of the speaker. That just putting any 15" speaker in an old cab will not likely be optimal. May even damage the speaker, no idea how likely that is.
I took lowclass's advice and cancelled.the legend ca-154. I picked up a true bass cab with a speaker from seismic for @ 169(+ 10% off). I only really play out once or twice a year- with my students at my H.S.'s talent show. I am going to put the older 15 back into it's combo cab and wire it as an extension. That way I can donate it to my school's music dept and even use it if need be for the musicals my wife directs there. Thanks again for some sage advice, I'll post when I hook the tce-bh250 up to the new 15. I am sure it I'll blow away my little marshall combo. Cheers