Yeah ive heard 10s hitting cleaner is a miss - its all to do with box dynamics yeah?
Correct, hell you can make a 12 sound like a 6 if you'd want to, just choke the hell out of it in a super small sealed box.
You can make a larger sub perform like a smaller, but not the other way around. (only applies to SQ, SPL is another story)
A small box will give less SPL but a tighter sound is that correct? Clean hits are just boosted upper bass frequencies no?
Now your getting into tuning, generally a sub box will have a certain frequency that it is tuned for 30-50 hz. This is all preference. Whether your tuning for quality of spl, it's all about matching your sub/box/car interior acoustics.
This is why I bang my head on the table every time someone asks how a certain setup is going to sound....way too many variables in the equation.
Clean hits are described as the ability to reproduce the input as correctly as possible. SQ cars will have multiple subs tuned at different frequencies along with awesome active crossovers with insane amounts of -dB drop off at certain frequencies.
Is there a SQ diff between the W3 and W6? I have a 12W3, and even though it was only getting 250rms, it was more than loud enough for normal (ie not showing off) listening
I couldn't tell you, I gave up on JL years ago. I feel they went the way of Bose home stereo, being they have their heads so far up their asses with how superior they used to be, they can jack the price up, all while milking the market all they can for a name that used to be good.
There are so many companies in the audio game doing it better and much cheaper. Don't be afraid to wander brand wise.