Ok I found out what is the problem. I connected stereo output from my pc to that line in mono input which was wrong. When I connect to stereo input 2/3 or 4/5 with different cable everything work OK. Thanks for your answer
I have 2 Wharfedale Titan 15 passive speakers, Wharfedale Amp CPD 1600 and Wharfedale Connect 502USB mixer. So I connected everything but when I play music sound is coming only thru high freq part of speakers and sound is terrible, woofer part is not emitting any sound on either speakers. I...