That's a good question, Sunnmon. The Concert sounds GREAT through the 118 folded horn, pretty good through the 215SH but not so hot through my 415M. A buddy borrowed my Concert to use with his late '70s 115BH last week and he likes it so much he wants to get one, too!
Those 118 folded horn cabinets are pretty impressive, I wish I had two of them from the earlier '70s. Although an Ampeg SVT-CL also sounds great through it, even my Studio Bass (which sounds awful through the built-in 15") sounds good. Can't wait to get my new-to-me Model T back from the shop with new tubes, caps, etc., and try it out. Should have it next week sometime.
Not sure why the Concert doesn't sound better with the 415M. I've run an Acoustic 150B and an Aguilar DB359 through it with better results.
