Hey all, bit of a noob question. After realizing my 410 sbx cab's tweeter was shot, I put it in bi-amp mode to bypass the crossover & tweeter altogether, to bring back some brightness to the woofers. (My 400RB is connected with a normal 1/4 in, since it's not biampable anyways) Even after replacing the tweeter, I still plan on doing this and attenuating the tweeter with knob on the back quite often because I usually play with a ton of dirt, sometimes my B7K and Agro at the same time. My question is does using either of these controls while the amp is powered on damage anything? It'd be nice to know if I didn't need to turn my amp off every time I wanna A&B settings. Also, how easy is it to install a new tweeter??? Thanks!