i no longer play live and have two peavey wedges we used to use for foldback on stage. one is powered and the other is passive but driven by the powered wedge. now i want to sell them and need to be able to demonstrate them to possible purchasers. they used to just plug into the monitpr output of the peavey pa head or the monitgor output of a mixer.

so what do i use to feed them now to demonstrate? i have an amp with a DI output. another amp with an extension speaker output (8 ohms). plus of course an ipod or tablet with a headphone output. i never worked out what the pa head output was. please advise what i should use to test the wedges.