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Car Audio Equipment
Subwoofers
12" vs 15"
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<blockquote data-quote="T3mpest" data-source="post: 7371643" data-attributes="member: 560148"><p>Do you even know what that graph was showing? Sounds like you don't. It affects the "peaks and valleys" as you called it because the added mass LOWERS EFFECIENCY. The transient response of the driver was fine compared to the original. Transient response offset shows up in the time domain, that's the X asis in those graphs. Look at the one he zoomed in on, the green driver is actually offset vs the the mass loaded and raw driver. That's bad transient response. A change in the magnitude of the graph is simply an error in frequency response in terms of output. That's due to the heavier cone having lower effeciency...</p><p></p><p>Cars and speakers aren't the same. The exact same force that accelerates a driver forward will be the force accelerating it backwards. Electricity and shifting magnetic fields move FAR faster than the driver. A drivers ability to respond to it's input signal isn't limited by mass in terms of speed, it's limited by the shifting of the magnetic field. That's the coils inductance. More mass just means you need more BL to get the same output.</p><p></p><p>Lastly since audioholic asked about excursion. According to a quick run through winisd. A 10 and a 15 with equal output at 40hz... 10 needed 39mm of excursion to get equal output as a 15 moving 16mm.</p></blockquote><p></p>
[QUOTE="T3mpest, post: 7371643, member: 560148"] Do you even know what that graph was showing? Sounds like you don't. It affects the "peaks and valleys" as you called it because the added mass LOWERS EFFECIENCY. The transient response of the driver was fine compared to the original. Transient response offset shows up in the time domain, that's the X asis in those graphs. Look at the one he zoomed in on, the green driver is actually offset vs the the mass loaded and raw driver. That's bad transient response. A change in the magnitude of the graph is simply an error in frequency response in terms of output. That's due to the heavier cone having lower effeciency... Cars and speakers aren't the same. The exact same force that accelerates a driver forward will be the force accelerating it backwards. Electricity and shifting magnetic fields move FAR faster than the driver. A drivers ability to respond to it's input signal isn't limited by mass in terms of speed, it's limited by the shifting of the magnetic field. That's the coils inductance. More mass just means you need more BL to get the same output. Lastly since audioholic asked about excursion. According to a quick run through winisd. A 10 and a 15 with equal output at 40hz... 10 needed 39mm of excursion to get equal output as a 15 moving 16mm. [/QUOTE]
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Subwoofers
12" vs 15"
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