Hi, I work at a company that produces a fairly popular jobsite radio/stereo. Currently, we use two 6" drivers with seperate tweeters. We're in the process of redesigning the radio, and they were going to move to a subwoofer and twin 4" drivers with two tweeters. However, now they feel that the sub is unnecessary, since we can "achieve the same sound quality with 2 4" drivers that we can with the two 6"s.
That is marketing's words, not mine. However, knowing what I do know about audio, I cannot possibly believe that. Speaker cone area is directly related to how low and loud something can get, along with excursion, etc. But from my perspective, 2 4" drivers are going to sound like crap. It might play loud, but I really doubt we're going to achieve the same sound quality.
It is my guess the business majors are equating 'frequency response' with sound quality. They see two drivers, both with responses of 20hz to 20khz, and say "Oh gee whiz, these must sound identical and provide the same sound quality".
Can someone help me explain this to them?
So far I've calculated the surface areas of both cones, and two 4" drivers have a surface area of 25 in ^2, and two 6" drivers have a surface area of 56 in^2.
So.... help me out. How can I explain this in very simple terms?