I was skeptical about going with the 6.5 but I was able to fit a few extras by mixing in some 6.5’s and 8’s. Tested and tuned the 6.5’s separately and I was very surprised at the response of the 6.5’s when crossed over as low as 45hz on about 200 watts a piece. Raised the crossover to 60hz and poured over 500 watts to them EACH and zero issues.