I had problems myself with 3 footers. I have all 6 foot HDMI interconnect cables now.
I have a Sherwin-Williams near me with Benjamin Moore across the street. The Sherwin-Williams store had LRV for all of their paints. The Benjamin Moore store didn't know what is was talking about.I used SW 6258 Tricorn Black which has an LRV of 2 or 3 depending on the card. That's about as low as it can get. It's black pit now. The ceiling fan light that was there before only lights up the center of the room and you can't see anything at the walls and corners. There is a Rosco paint that's popular but generally has to be ordered online and shipped.I'd use the velvet were you can and paint what you must.Some of the final readings were at the lower limit of the meter.
I order the Roscoe Black Velour from B & H Photo. The stuff is crazy dark.
With as much time that I have spent on B&H, I never saw or thought of looking for paint! Do they have black velour? ;)
Now you just need to throw some black carpeting over that white carpeting !!
Okay, just tried a 5-footer and a 6-footer. I have a 5-tier vertical rack so I had bought a few sizes. No change. I'm betting on the X4200 being bad, I'll report tomorrow.
I bet David Vaughn could assist with the Benjamin More info if you needed a comparison.
Hi Mike, thanks for the name of the device, I may have to go that route if nothing else works.