The BDM9 would appear to unravel the flashing mild issue. I see it's a Stereo/Mono line output for any different amp/subwoofer. I will look far more closely at it and will most likely set one on buy. I have currently constructed a TPS3255 using the 3E board/energy supply, so might https://www.qavendors.com/qa-testing-services/displays-holders