JA also measures on tweeter axis ,its just part of the average measured response which consist of several measurements , but the average room response is what people hear not what is measured in an anechoic chamber .
What i heard with the felt is a fact as to how i heard it and at that moment the speaker had a flat FR (measured without felt )
I didnt measure with the felt on , and ive made/tried speakers with flat FR elevated FR and downslope FR , it kinda sounded as when one would reduce tweeteroutput .
But youre ears and knowledge differ from mine quit a lot ,if you think the indra in room response is hot , no problem .
I did not say it's in room response was hot, i said it's measured FR response was hot and the In room response wil always show a trailing of the highs due to mic proximity, twisting my words wont change that ...
and Yes, you are right , i was not there to see how you were applying the felt, my guess, you were impeding the Tweeter, so you lost top end ..
But ...
I have built a few Myself ( moons ago), measured alot, sold them too , to studios , mastering rooms, stereo shops , blah ,blah ,bah, so i know a little bit, not as much as you , just enuff to sniff around ..
Regards,