Bass and guitar sound too loud.

Thanks for your quick answer. I have another question.
My guitar to a direct insertion box (DI) then to the mixer. Thats ok.
Do i have to use the same kind of direct insertion box (DI) for doing the other way around?
I mean, from the lp16 to a direct insertion box (DI) then to guitar/bass amp.
Is the same using a DI to send from bass to mixer than to send from lp16 to amp?
Let me be more clear, what can I use for connecting lp16 to bass/guitar amp, a normal Direct box or a reamping direct box?
Thank you.