http://adireaudio.com/tech_papers/woofer_speed.htm //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifOriginally posted by d audio 450 The weight of the cone also has alot to do with the response time of the sub itself. The more weight that the coil has to move, the slower response time. (again, i could be wrong). this is why 10's are commonly called "tighter" than 15's or 18's. The inertia from an 18 is greater than the inertia from a 10. (Although a bigger and stronger coil/mag structure can compensate) therefore the response of an 18 COULD be considered "boomy" as opposed to "punchy".
no offense but spoken like a newbie. ask audiolife if you can make 15"s sound good, ask people who have won Sq comps with 15"s if you can make them sound good. it's all in efficiency of the driver and all the other long winded stuff that adire said lol.Originally posted by joshpoints Depends on your sound preference. If you just want it to be loud rather than sound quality go with 12's. Tens sound cleaner with more differentiation between notes. 12's just sound like they're making one long note. 15's and 18's are even worse. I wouldn't go any bigger than twelves for sound quality. I personally like the sound of tens.
Ask the guy if he has a lot of money to pay for a 15" sub that sounds better.Originally posted by bumpin_blazer no offense but spoken like a newbie. ask audiolife if you can make 15"s sound good, ask people who have won Sq comps with 15"s if you can make them sound good. it's all in efficiency of the driver and all the other long winded stuff that adire said lol.
adam
Sound is moving air. SPL is displacement - especially in the lower octaves.Originally posted by d audio 450 more subs does not mean louder...they'll move more air, but they wont be louder!
if the 10's have higher power rating then they will be louder... otherwise, you're just moving more air.
Displacement is stroke and cone area - it does indeed greatly influence lower octave volume, or you'd see everyone using 10" drivers to accomplish what they need a 15" to do.Originally posted by d audio 450 the size of the sub will not greatly influence volume.
No... The motor strength will completely counteracth this, and in 99.9% of the cases, this idea is complete garbage. If you want something to blame it on- blame it on inductance.Originally posted by d audio 450 The weight and stiffness of the cone directly relate to how fast the sub will go from point A to point B.
Stroke and cone area. Moving at 60 cycles a second is 60 cycles a second, be it a 24" driver or a 10".Originally posted by d audio 450 An 18 will only move more air, not move air harder.
Actually you are hearing about .05 watts, after driver losses.Originally posted by d audio 450 Same principle of adding wattage ina stereo setup. if you have 2 50watt speakers and you put 50watts into them, you are not hearing 100watts...you are hearing 50.
Only in a perfect world and in an unenclosed area with no interactions, you'll be laughed off the SPL circuit if you said that to any hardcore SPL user though as our cars create serious issues with this - and driver squabbles also cause troubles here too.Originally posted by d audio 450 SPL- the pressure reached in the positive and negative compressions of air have the same absolute value.
No... mass has next to nothing to do with transient response.Originally posted by d audio 450 The weight of the cone also has alot to do with the response time of the sub itself. The more weight that the coil has to move, the slower response time. (again, i could be wrong).
Ummm.... yes, mass has a fair bit to do with transient response. It's just less of an issue with subwoofers because of the frequencies being played, as well as the fact that you generally have larger motor/magnet structures and more power to manhandle that mass with.Originally posted by jlaine
No... mass has next to nothing to do with transient response.
[/b]
simple as this don't argue with josh on any subject regarding anything if your name is afroide. he is one of if not the smartest audio guy i've read about on this or SIN. the guy knows his stuff simply put.Originally posted by afroide Ummm.... yes, mass has a fair bit to do with transient response. It's just less of an issue with subwoofers because of the frequencies being played, as well as the fact that you generally have larger motor/magnet structures and more power to manhandle that mass with.
mass will only affect SPL. put say 100g of weight on it. the first thing you'll notice is that the SPL has been decreased. u know what..go to adire's office and dan will show you a tumult with increased mass on the cone reproducing frequencies up to 10khz.Originally posted by afroide Ummm.... yes, mass has a fair bit to do with transient response. It's just less of an issue with subwoofers because of the frequencies being played, as well as the fact that you generally have larger motor/magnet structures and more power to manhandle that mass with.