Difference between 15" and 12" sub

[Bob345 39]

lol im an idiot so if a larger structure can oscillate with larger amplitude than that of a smaller structure why couldent it create a lower frequency than the smaller

a 15 could play all frequencies a 12 could just the 15 would play all frequencies at a higher volume because a 15 displaces more air than a 12. More surface area means more radiating surface that can displace air

[///M5 2,833]

how do you know then how low of a frequency a woofer can play with out the driver being damaged

It isn't just the woofer, but to simplify it is the box, the environment and what you send it for a signal. All of which are VERY easy to model.

[ssh 924]

lol im an idiot so if a larger structure can oscillate with larger amplitude than that of a smaller structure why couldent it create a lower frequency than the smaller

it creates the same frequency but at a more intense level (spl).

In simple terms: A speaker compresses and displaces air forming sound waves. The bigger the speaker the more air compressed and the more air displaced, thus increased output.

Other things come into play such as xmax, motor force, etc, but that's for another topic.

[BassThoughts 0]

there isnt a rating or something that says when this sub is in its recommended enclosure this sub can play as low as this frequency without being damaged? lol how have i gotten so far without blowing every sub ive owned

[thor02 2]

there isnt a rating or something that says when this sub is in its recommended enclosure this sub can play as low as this frequency without being damaged? lol how have i gotten so far without blowing every sub ive owned

It can play as low as you want it to, but a subsonic filter will help control your sub below box tuning.

[///M5 2,833]

there isnt a rating or something that says when this sub is in its recommended enclosure this sub can play as low as this frequency without being damaged? lol how have i gotten so far without blowing every sub ive owned

The rating consists of a set of parameters that require that you understand your box, your amp, your signal, and your environment. NO OTHER RATING is anything but a joke.

[BassThoughts 0]

so if a sub plays to much lower than the enclosures tuning it will suffer mechanical damage right?

[BassThoughts 0]

i only ask all theese questions because i want to learn as much about car audio as possible and dont know where else to find the information that is correct and i want to get the most out of the Fi woofers i ordered without damaging them

[thor02 2]

so if a sub plays to much lower than the enclosures tuning it will suffer mechanical damage right?

Yes, if your ssf isn't set correctly and you have the volume turned up too high, it will probably kill the sub.

[Bob345 39]

i only ask all theese questions because i want to learn as much about car audio as possible and dont know where else to find the information that is correct and i want to get the most out of the Fi woofers i ordered without damaging them

Well you came to the right place, and what subs did you buy?

[///M5 2,833]

Yes, stop with the random questions and instead make them SPECIFIC to what you have. You will get MUCH better information as it is easy to see you have been VERY misled in the past.

[BassThoughts 0]

i only ask all theese questions because i want to learn as much about car audio as possible and dont know where else to find the information that is correct and i want to get the most out of the Fi woofers i ordered without damaging them

Well you came to the right place, and what subs did you buy?

i just started a new topic for help with my woofers im afraid everything that everything ive ever been told about woofers is wrong which im not suporised i never get the same answer from car audio shops so ive been trying to piece together my own understanding with not much luck lol

[SubSam 21]

Ok: Every speaker has the ability to "move in and out" at any given frequency in the audible range of a human. That's what determines frequency, the "pace" at which the speakers oscillate. As the sound frequency nears the limits of our hearing range, our sensitivity to each frequency drops off rapidly.(as well as many mechanically/ electromagnetic issues with speaker design but ignore that for now) Therefore the lower notes need to be played louder for us to perceive them at a normal volume. Thus we make speakers with larger cone area and high power handling to play the lowest notes in our audible range.

6.5" speakers typically bottom out when you try to play low bass through them but that doesn't mean they can't produce the note. The motor/design of that 6.5 are to play mid range, not low bass. You could design a 6.5" subwoofer to play low volume bass easily, and without the speaker ever booming out, as is what would be its design intention: its a SUBWOOFER. Just most companies choose to make bigger subwoofers than 6.5's for practicality.

The "lowest note your sub can safely play" is a bit of a flawed idea, but to give you an idea in a ported enclosure you only have "control" of the sub down to the tuning frequency, any note you play below that the speaker behaves worse and worse, and it gets even worse if you crank up the volume.

I hope I kept it simple if you want a better picture read here: READ EVERY WORD

[BanginGMC 23]

C is for COOKIE

[BassThoughts 0]

thank you very much subsam now i get it lol thats what i needed