I had 3 Jenson 12 VDC televisions in my Sunseeker class CV and with the volume at 50 percent on any television it would blast you out of the coach even with the AC running.
Have you checked to see if the television has a volume limiter in the settings?
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk (Toad)
FMCA - F432054