Connecting a Powered Subwoofer to a 2-Channel Amplifier?

[Rayzilla]

I found a few websites that described how it is done in general but I was wondering if anyone here might be able to help me with connecting this on my specific audio equipment. I will try to post pictures of the back of the powered Final Sound S110 subwoofer and the Cayin HA-1A amplifier.

Thanks.

[monomono]

You should be able to plug your source L+R into the sub line in, then the sub line out to the amp "signal". Check the sub manual for exactly what is the purpose of line out.