I have a JVC RS540 and while it does HDR, it doesn't have its own DTM capabilities. I was supplementing it with a Panny UB420.
When I joined the Kscape crew last year, I was shocked to see that all HDR content was so dim that it couldn't be watched. I purchased a Lumagen and linked up with
@KDeering to dial it in as I didn't feel like doing it myself.
The results were like getting a whole new projector!
The HDR content through the Panny UB420 couldn't get as vivid since the DTM settings were limited for that specific model. Futhermore, I no longer needed my external Darbee DVP-5000S for 1080p content. Plus my Darbee processing was now applied to all inputs not just the single input that was covered by the standalone model.
Lesson learned in this scenario was that I should've purchased a Lumagen or MadEnvy much earlier in the life of my theater room.