I believe that those subs with stiff suspensions need to have the appropriate amount of motor force to overcome that resistance. If not' date=' they become mechanically over damped in a sealed box, leading to a faster drop off down the response curve, especially in a box that is smaller than the subs VAS rating, which are typically quite high with subs that have stiff suspensions.
And so a ported box is more appropriate for such subs to prevent excessive damping from robbing low end ouput.
If I'm wrong somewhere, show me, because I really would like to know.[/quote']I think you should read up on and understand what T/S parameters look like for a 'sealed only' type of driver. Also take a look at why a suspension would need to be stiff, is it because the designer wanted it to be used in a tiny enclosure or is it because the BL mandates it? Or is it simply to reach the goal of having a certain Qts based on a given motor strength and a desired enclosure size?