Hello everyone. I recently did a few concerts and had a morning service I played for. At the concerts, I plugged a cable from my iMac, of course using a 1/8 inch TRS to 1/4 Inch TRS Adapter Cable into the PA. It didn't go well at all. So I switched to a mono cable using a Peavey stereo 1/4 to 3.5 inch converter adapter. I heard that Peavey was a high quality product. I was successful in getting sound, however, it sounded warp like. The music sounded like it had been layered with reverb, the song leaders sound very echo-ish, which meant something was wrong. I checked the cables, and everything seemed in order. I thought maybe one was defective, so I tried the other one. Same thing. The Peavey stereo 1/4 to 3.5 inch converter adapters were both brand new from the website. I also did this at my church. But the sound was full of static. I thought that maybe my iMac was pumping out a lot of power so I turned it almost way down and then pumped the gain on the missing bored, but it still sound weird. Anyone have any advice, how not to embarrass myself again? Thanks.