I see we are discusing in diferent worlds. I am speaking about main part of the speaker- speaker drivers(woofers)and there is no posibility more than 6db diferencies in low FR on same size woofers. You are talking about speakers eficienty where sensitivity can vary from arround 80db to 95db (in some cases like horns vs electrostats 75- 113db) because not speaker driver(s) determine speaker sensitivity but speaker designer -enginier. he can reduce (by changing BSC etc. ) or tilt up ( by adding more paraleled drivers, changing drivers interaction etc)
so we are both right. btw In your place,I would take manufacturer specified sensitivity values with salt and grain- unfortunately there very rarely tells truth.
so we are both right. btw In your place,I would take manufacturer specified sensitivity values with salt and grain- unfortunately there very rarely tells truth.