Some old intercom spkrs 4" alnico, 8" ceramic and below is a old cts 10" alnico from garage sale finds. The 10" cts was put in an re-purposed birch ply drawer. I've tried to blow up the 8" its still hanging in there. Just a few minutes ago was playing the pp6v6 monoblock and board with the 4" in the basement and Mrs didn't complain (watching tv right above me). And the over-sized 1x12 cab