“If buy all Klipsch 2.1 including this sub to connect my 2019 LG OLED "C" out, preferably using optical, how does cabling go? Think this is RCA in. Prefer first to sub to strip out summed bass? Then two sides? But no optical in? No out? Volume control?”
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This sub has the standard connections for most modern subwoofers designed for a 5.1 or 7.2 home theater systems. That means RCA Left and Right in connections with one designated for LFE if that is what the AV receiver has. There is no optical in. If I understand you right you are planning to use your LG as your audio out with no AV receiver. If your LG has LFE designated for a subwoofer that would be the way to go, but if it has RCA out that would work as long as you have RCA connections designated for your main speakers as well. It has a phase switch which I won't get into, and frequency and gain dials. Frequency controls the depth of sound that the main speakers will cede to the subwoofer and the gain dial is used to match the volume of the subwoofer to the main speakers for a better harmonic sound. It really comes down to how the audio out connections from the LG are set up if this is right for the 2.1 system you are looking for. If the LG has has LFE for subwoofers and RCA audio out for main speakers it will work.
Sorry, there was a problem. Please try again later.These are not powered speakers, so you will need an amplifier. TV connects to amplifier (5.1 channel AVR's are less expensive than stereo amps, and they have the LFE output you need to connect this sub). Take a look at the audio-video receivers on the Best buy site, look for a sale on a decent Denon, Marantz, or Yamaha.
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