Right now, my rig is a Spector NS2000/q4 into a Kustom KBA100 as a head into an Avatar B210 cabinet. Right now, my sound is "too clean" I guess.. I'd just like to add a bit of bite to it, a la Geezer in Bassically. Not heavily distorted, like Lemmy, just a bit of bite. Is there any way for me to get that kinda sound without going and buying a new tube head?