I replaced the 15 in my Traynor Bassmate with a Weber Cali 15. Same ohm load. The Cali sounds sweet at low volumes, but mushes out when pushed. I was under the impression the Cali was a heavier spk. I tried the amp through a different cab with Greenbacks and it was tight all the way up. Whats a 15" type that will hold up to high volumes? Nobody really uses them.