I have a Marantz-18EX driving a 5.1 setup with Paradigm 100 as front speakers. I just bought a Portal Panache amp, a 2-channel stereo amp. Since the bi-wire speaker cables from the Marantz have banana plugs at the speaker termination ends, I bought a new pair of speaker cable with spades at the speaker termination ends. I connected the new cable to the Paradigm speakers with the idea of listening to music with the Panache. That was straight forward enough I thought. However, the Marantz shorted out when I turned it on (while the Panache was off) and the Panache sounded terrible when I turned it on (while the Marantz was off). What is going on? What do I do wrong? I only turn on 1 amp at the time? Many thanks.