Can I use the 1/4" input #2 on the back of the unit instead of the one out front? Will this hurt the unit? I'd like to use it in lieu of the regular input as it has a db drop. I can use the front input and just turn my bass down (it's active) but live it tends to get knocked around and I'd rather be sure that I'm not sending too hot a signal into my amp. Thanks in advance for your input, Clint