Cone velocity does not dictate frequency. It does however affect output as its related to excursion for a given frequency. If mass affected velocity which affect frequency, then two different subs fed a 50hz signal (for example) would output two different frequencies based on their mms difference, which we know is not the case.
Yes, lets all throw random woofers in our cars based on the current popular brand of the month. That way we have no idea what effect any of the T/S parameters have on the sound and can simply be sheep who buy stuff based on magnet size and how many spiders they can through on the thing. Speakers are a machine, the are enginnered, physics helps. You want a sub that can play high, I'd rather be able to look at published T/S parameters and take a very educated guess vs throwing something in my car and hoping it works out, especially since everyone has a different car, which makes a huge difference in the validity of the antecdotal evidence. I got a buddy with a CRX who swears by audiopipes low end woofers as they are louder than my car and he only has 2 12's and I have two 15's. Too bad I'm in a ****ing cadillac eldorado and he's in a car that would register a fart at 155. Real world testing is garbage unless you have the ability to read the data properly and make actual changes to your design that will fix the issues. Without physics your shooting in the dark either way.
Spoken like a noob who doesn't understand the intricacies of how a speaker operates beyond 'it goes boom like so'. If you cant add to the conversation, try learning so maybe next time you can.
Nice try. Tuan will not support your theory that math equations play no role in understanding performance. You think speaker designers just randomly throw parts together and test until they get the performance they are looking for? Seriously, you are in over your head here, just sit down, read more, and type less. Your domain is the t-dome, not threads like this.
inductance is can be controlled by raising DF and lowering back emf.
Damping factor relies on the impedence of the sub as well as the amps output impedence. If the subs impedence is constantly shifting the overall systems DF is adversely effected. keeping the amp with a stable ouput impedence is relatively easy, getting the sub to do the same isn't. The general solution is still usually shorting rings which keep both the inductance low as well as the inductance variation with stroke. I'll concede though that many drivers show a very low inductance that doesn't stay that way once the coil begins to move. Keeping the variation as well as the overall inductance low is important. variation even moreso, which is why FEA is important even with rings added. No sense in getting inducantace down to .25 if it jumps to 2.28mh once the speakers breaks 9mm excursion. I agree wholeheartedly with your measurement analysis, unless the speakers going to be babied you need to see what the thing looks like with a large signal applied to it.
Just goes to show how readily you will talk about things you know nothing about. Unless you are much older than you act, I was experimenting with enclosures for subs when you were still playing with Lego's. Have a nice night.
