A:AnswerHi Don. The LG LG - 2.1-Channel Soundbar System with Wireless Subwoofer and Digital Amplifier - Black, Model # SH3K does not have a headphone (3.5 mm) port on it. Typically, LG Soundbars do not have headphone ports on them...^IFV
A:AnswerWe hate to hear you are having trouble out of the subwoofer from your SH3K. Check out the following help article to troubleshoot issues where the audio is missing from some speakers but not all: https://www.lg.com/us/support/product-help/CT30009760-1429107643672-no-sound-no-audio-low-audio If you need assistance, do not hesitate to connect with us directly via Twitter @LGUSSupport or Facebook https://www.facebook.com/LGUSA/ or you can give us a call at 800-243-0000. ^CP
A:AnswerIt should work with the optical out on your receiver. I have not use this with a receiver as you describe but would not see why it would not work. I used it as a pass through to my tv for all my av devices so kind of used the tv as a receiver for my ps4pro pc laptop xboxone and it worked that way with out problems so surely it would work with a regular receiver unless it’s a really old receiver and the audio codec aren’t playing well together.
A:AnswerWe will be happy to look into the installation of your home audio system to see what could be going wrong. Please take a moment, at your convenience, to contact us directly via Twitter @LGUSSupport or Facebook https://www.facebook.com/LGUSA/ or you can give us a call at 800-243-0000. ^CP
A:AnswerRegrettably, we do not have information regarding 3rd party brackets compatibility with our soundbar. Please check with the manufacturer of the bracket to ensure compatibility. ^CP