I think Mohdkhamsyawas looking at going from 3.5mm jack to speaker taps. Not sure how that affects using the Emotiva amp regarding common 3.5mm jack ground.
There are some good DIYers here that could get you some full cables and adapters for when you feel like using a speaker amp. Or BTG audio seems to be another popular one. Q-cables? Yes the Emotiva would have cost me more than half the price in shipping alone - probably sooner get that than the Marantz still. But for $100 it is quite cheap. Is the Marantz in good condition? Refurb'd? Do you want to use its inbuilt DAC? What headphones are you using?
I'm using the he500s. I dont mind reterminating my cables to xlr and have xlr to banana adapters. But I'd prefer to have an adapter ready made for my current 3.5mm jack. The Marantz is used. I dont know the condition but the seller rated them as 'in working condition'. Its ridiculously cheap. I plan to use it purely as an amp. I have the nfb 11.32 right now and I can use this as a DAC. The amp section has power. More than 1Wpc if I remembered right. But I'm not satisfied with the bass. Its deep, but I feel that it could use with a little more body.