For those of you that are curious about what I am talking about when I mentioned bass transducers (can look it up on youtube), it takes the subwoofer channel in your speaker system to another level and shakes your seat giving you a 4D feeling now that you have 3D viewing and I think it complements the Rokid Max very well when watching with external 5.1 surround sound. Basically, you are getting effects from 2 subwoofers. One for normal listening and another for your bass shaking seat. I have my computer connected to a LG CX 48-inch 4K OLED TV (OLED48CXPUB) that can output optical to my soundbar if playing files 3D files from a PC. If you have the Panasonic DMP-BDT110 3D Blu-Ray Player and playing 3D Blu-ray films from that, you can use the optical port from that as well.
Basically, you need to split the optical cable using a digital optical cable splitter. 1 cable goes to your receiver or in my case, soundbar for 5.1 surround sound. The other optical cable goes towards your bass transducer. You need to decode the 5.1 surround sound to just get the subwoofer channel (*.1), so you need a digital (optical cable) to analog decoder. Since the digital to analog decoder share 1 output between the center channel and subwoofer channel, you need to split that cable up to just get the subwoofer channel using 3.5mm to 2 RCA Audio Cable and 3.5 mm TRS to Dual 3.5 mm TSF Stereo Breakout Cable. Finally, once you have that setup, you have 1 redline going into the amplifier. From the amplifier, you have 1 speaker cable going into your bass transducer which I installed underneath my seat. That is it!
Here is what you need. And you can replace the ones I mentioned here with either something cheaper, better or something more powerful but I went with a low cost solution:
Digital Optical Cable Splitter ($12)
https://www.amazon.com/ZEXMTE-Digital-Optical-Fiber-Splitter/dp/B07BKQVB8N
Digital to Analog Decoder ($45)
https://www.amazon.com/Orei-DA50-Digital-Analog-Decoder/dp/B00C97APTS
Cables to isolate the subwoofer channel from that decoder ($5-$6 each)
https://www.amazon.com/Hosa-YMM-261-Stereo-Breakout-Cable/dp/B000068O5H
https://www.amazon.com/Auxiliary-Adapter-Splitter-Theater-Headphone/dp/B0B28VCTF1
Small Amplifier ($47)
https://www.amazon.com/Nobsound-NS-03G-Channel-Amplifier-Supply/dp/B09GVTWPFC
Bass Transducer ($75)
https://www.amazon.com/dp/B0002ZPTBI
1 speaker wire, 1 3.5 mm cable and 3 optical cables.
I have seen the Woojer Vest 3 which has several transducers and you can connect it to your body but it is very expensive and only takes stereo sound and it doesn't isolate the subwoofer channel specifically (not yet). I like my solution better even though it is not portable.