Power a cab with this?

[Deltatim]

FYI - the Peavey manual for the XR600B states that the input impedance is 220K ohms - high Z unbalanced for the 1/4" channel inputs. This is the same input impedance as the "High Gain" inputs on the old Peavey bass amps. So, all of the arguments are moot - it should work just fine with a passive bass (and, it DOES !!)

Mine worked just fine with passive 80s S101 and active BTB675. Into the 1/4 jack.

 

[Timmy Liam]

It's rated at 210 watts @ 4 ohms and 300 watts @ 2 ohms. For an 8 ohm cab, that's likely about 120 watts.
You probably will have to use either the Hi-Z inputs or the Aux input. You might possibly need a DI to use a mic input.

Manual attached as pdf.

Hey Dr Jim-
Thanks for attaching the manual!