Originally Posted by MKtheater
That cost is 6 times more distortion which I just learned. Sonosubs again. I will be comparing a UM18 to my xxx18 very soon.
sealed is better. You just buy enough drivers for low distortion and spl. It will give you full band everytime. Everything else is a compromise. The compromise to sealed is cost.
Let me highlight it for everyone: "Sonotubes AGAIN
I hear an echo in here.
The RE-18's should walk circles around the UM's, at least below 40hz they will...
The UM's don't have much excursion, which is actually a HUGE problem when you are trying to get low and/or loud with watts. Especially so with fewer subs. As the cone-count increases that advantage likely diminishes, because (at some threshold) unused headroom is just that... that threshold is never encountered below 20hz because of how inefficient those frequencies are in regards to cone-based displacement and how our ears work.
Stated a simpler and different way: It seems one can never have TOO MUCH <20hz,
the SPL is never-enough!
As per sources, the men-in-black did tests back in the 40-60's with big subwoofers and other loud things ->
A 20ft subwoofer ought to git-ur-dun!
and supposedly 170db @ single digits is ear-damage loud (as per the "them"...)
Don't be scared of the "hypersonic missiles" fear mongering of recent. Someone needs to tell them we've had Mach-20 missiles since the 40's, it's nothing new. (Also tell them that we knew back then... that they had it too. The Russians.
) China has it now as well (yes, we know that too!
The whole crust was mutually assured back THEN.
Just think of how mutually-assured we are with TODAYS technology...
High Technology has made war pointless. (and it always has been; in case it wasn't completely obvious...)
Breaking things is easy, any imbecile can do that... making the earth a BETTER place takes real-intelligence and properly applied-skills. (The human race ain't there yet on either count. LOL!
Anyhow, where we're we again? Oh yes, loud things. Right!