2 Passive speakers setup problem/question

[acofalc]

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 don't know if I explained good because I don't have much experience, so I am posting pictures of my setup and if someone can help tell me if i connected something wrong or it is something wrong with the speakers?

http/imgur.com/a/0o0mD

 

[Ralston18]

On your line-in it appears that there are two adapters of some sort. Is that correct? If so, what are the adapters doing?

Have you tried other, known working audio cables?

 

[acofalc]

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