Ive bought a Marmitek - Connect AE24 UHD 2.0 as a HDMI audio extractor to feed my HD621.

The HD621 was an eBay purchase and it seems to have a faulty HDMI out port and cannot get any video out from it.

Im using the Connect AE24 to feed 5.1 LPCM from my Xbox one to the HD621 and then send the video to my GT50 Tv. (the AE25 manual mentions only 2 ch PCM, but it seems to work with multi channel LPCM)

I just plugged all the HDMI cables in and turned it on and it all worked cool

Im hoping to get an OLED this year, so Im expecting the AE24 will play nicely with it.

Ive only had the AE24 a day, but Im very happy with it and at around £85 it seems to be a bargain way to keep a HD621 compatible with UHD 4k / HDR HDMI.

Main system:G65, 218, HD621 2 x DSP5200SE, 1 x DSP5200HCSE, 2 x DSP5200SL, Power Sound Audio S1512, DSP Anti-Mode 2.0 Dual core, NuPrime H16AES, 518, Dune HD Homatics Box R 4K Plus running CoreElec 21.3, Oppo 103D and SqueezeTouch. Atmos, MQA and Trifield! smile