Originally Posted by Ron78
The better Mic grin should be more accurate and more sensitive and thus certainly lead to a different result, especially in the range up to 250Hz.
Is that really the case though?
I was under the impression that MRC measurements were entirely time based and completely unrelated to frequency so there should be absolutely no difference in results between a properly working SPL meter and a high quality mic.

I could of course be wrong though.

Sources: MS600, Fidelity Audio Reference Oppo UHD-203, Roon/QNAP, AppleTV 4K
Processors: Arcam AV40, 271 x2, Lumagen 5348 with Keces P8
Speakers: DSP7200SE FL/FR, DSP5200SE VC, DSP3200 x11, DSP320.2 VOG, DSW x4
Display: JVC DLA-N7 with PK-EM2, Panamorph Phoenix Pro, 128" 2.37 Curved Silver Ticket AT Screen