I am a bass player who is in a band that tracks live a lot in our practice space. I want the quality of the bass signals we are recording to improve. I am running two amps. I split the signal coming out of the bass with a Lehle p-split and run one amp clean and the other amp dirty (I have a loop with boss ls-2 , fuzz, qtron, micro pog, etc). In the past we have been mic'ing both amps. But I am pretty sure we will get better sounds if I can run a clean signal direct into the board. My clean amp is a '68 B-15. It has an "external amp" jack that I thought I could run into the board. When I tried this the amps volume decreased by 75%. This is no good for tracking live. I do not know if this is normal. Then I thought, "I'll get a DI box." But all of the low z jacks on the mixer are used up so I'd be going into a high z jack. But this makes me nervous as I've already split the signal once and don't know if I should be splitting the signal again. Agghhh! Help what should I do?