I've got a bass sans amp plugged into an SWR 350x head into a backline 210BLX-II cab.

I finally got the tone I wanted by cranking the volume and gain up, but I notice a buzzing sound everytime I hit a low bass note (like on the E string).

It sounds kinda cool, but do you guys know if it'll cause any damage to my cab?
Does being successful truly make you a sell out? Can't you do your own original music and be successful because of it?