mrmojorisin

I would like to share my experience with my 1985 Cornwall 1`s ( b-3 crossover). When I got gifted these I installed new diaphrams from simply speakers on both mids and tweets. The resulting listening tests were not good. Weak bass ,shouty mids ,in a word-unlistenable. So bad got taken out of rotation. Fast forward a few months, got sick of looking at them instead of listening to them and put them back in rotation. Same story, thin bass shouty mids, not good. In desperation I powered down the Crimson 275, and swapped polarity on the right cab. With the same music playing I powered up the KT 120`S and as the music came on I froze in my tracks! BIG FAT SOUND was coming out! I staggered back to the brown peppered sack in the shotgun shack and layed there transfixed for the rest of the evening. Totally transformed the sound! Upon investigation the next day I found the mid driver wired out of phase in the cab I had the polarity reversed on. So heres the thing, whatever is causing the bass deficiency is cured with reversed polarity. I did all the checks on the bass driver and inspected the crossovers and wiring All good. I left the mid driver out of polarity AFTER THE DIVIDING NETWORK, and am running reversed polarity on the input to the speaker! No I am not kidding. I know this shouldn`t work, but it does. Have tried just running the bass driver out of phase but running the whole cab out of phase and the mid driver out of phase after the crossover seems to work best.