Thanks! guys. Problem solved. It was the solder problem. I resoldered the RCA jack. Hum is gone now. Thank you all.
Hum In Theta Pro Basic IIIa
I'm keep getting humming sound from my Theta DAC. It is connect to Meridian 518 DSP and Meridian is connected to my old CD-Player. Strange thing is, if I'm twisted the cable connected to RCA out from theta a bit the hum is gone. I got rid of the Meridian once, but still getting Hum sound. I will really appreciate if you guy help me out? Thanks.