F3 is not proportional to the Fs, it is proportionate to the box volume and tuning. If you put a 15 in a 8 cu. ft. ported box tuned to 62 hz, is the F3 still gonna be the same as if it were in 3 cu. ft. sealed? Are they both going to be the same difference apart from the Fs? If you put the same driver in 2 different sealed volumes, is the F3 not different? What about ported? How can the F3 be proportionate to the Fs if you can change the F3?
You apparently dont understand the relationship, because you are completely dodging the fact that you can change the Fs by changing the suspension, meaning in the same line of subs, a smaller size COULD have a higher Fs. I don't have to try to make you look bad, you are doing a good job of that yourself.
You don't have to tell me I'm an *******, thats old news. I also have no problem insulting your intelligence as long as you keep talking about something you don't understand, like you DO understand, and spreading false information like its the plague. The statements you have made make the uneducated on the subject consider the BS as fact and tend to repeat it to others, who in turn believe them. You then have an endless cycle of people saying they want low bass so they have to buy 15's to achieve it.
"2. Small Signal Parameters
The three parameters that primarily determine the frequency response
of a loudspeaker are compliance, free-air resonance, and Q.
The compliance, Vas, is a measure of the overall stiffness of the
cone, surround (the part the attaches to front of the cone), and
spider (the part that attaches to the rear of the cone). It is
specified as the volume of air having the same compliance as the
driver. A small number corresponds to a small volume of air, which is
stiffer than a larger volume of air. Thus, compliance and stiffness
are inversely proportional. Optimum enclosure volume is proportional
to Vas.
Free-air resonance, Fs, is the resonant frequency of the driver's
voice coil impedance with the driver suspended in free air (no
enclosure). The -3 dB frequency (F3) of an enclosure is proportional
to Fs.
The Q, Qts, is a measure of the sharpness of the driver's free-air
resonance. It is defined as (Fh-Fl)/Fs, where Fh and Fl are the upper
and lower -3 dB points of the driver's voice coil impedance in free
air. Optimum enclosure volume is related to Qts but is not directly
proportional. It is accurate to say that the volume gets larger as
Qts gets larger. Likewise, F3 gets smaller as Qts gets larger, and
for the sealed box enclosure, F3 is inversely proportional to Qts." - LOUDSPEAKERS PRIMER -
http://www.rdrop.com/~billmc/spkr.txt
And, I "aprently" dont understand the relationship? You aparently dont understand the english language very well. You still continue to try to beat on me for 1) spreading false info (that I have a reference to back up) and 2) acting as if Im some expert here, when Ive never said anything to that effect, and said (repeatedly) just the opposite. Aparently you have one serious hard-on for putting me down here.
And I liked the part where you say I keep making myself look bad. Hello, Ive been asking you to explain for a page and a half now. Do you think I care if people know I dont know everything about this subject? If so, please refer back a page or two when I stated, clearly, that I do not. The continuance on your part to try to pile on the insults isn't making me look any worse here, only the guy doing it.
"You then have an endless cycle of people saying they want low bass so they have to buy 15's to achieve it."
And for the very last time, I never once said you must have a larger sub to acheive low bass. Not one time. Seriously, Im trying to remain mature here, but Im finding it hard to when you talk down to me like this, and yet STILL cant get that extremely simple concept thru your head. Please try harder, thanks.
