Use Logitech X-540 5.1 Speakers with PS4...more description in the comments : r/PHGamers
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Bluetooth Adapter Fit for Nintendo Switch/Lite/OLED, EEEkit Wireless Bluetooth 5.1 Audio Transmitter with Low Latency Fit for PS4 PC Supports Bluetooth Headphone Speakers, with USB C to A Converter - Walmart.com
Sound System For Ps4 - Best Buy
PlayStation 4 | PlayStation Wiki | Fandom
Amazon.com: MAMBASANKE Bluetooth Surround Sound Speakers Home Theater Systems-6.5 inch Subwoofer 40W-5.1Channel Stereo Audio System with Optical Input for BT,PC PS4 Xbox DVD Player TV Smartphone USB,Party,Gifts : Electronics
My PS4 doesn't output 5.1 very well | NeoGAF
PlayStation 4 External Speakers Connection works for all PS4 Versions