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Car Audio Discussion
General Car Audio
how do brands like boss, pyramid, ssl not get in trouble for false?
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<blockquote data-quote="hispls" data-source="post: 8090986" data-attributes="member: 614752"><p>In practice, yes, but only because of changes in impedance at various frequencies. Assuming you could keep impedance constant (or drive a pure resistive load like a planar driver) power should be the same assuming we're in it's useable bandwidth</p><p></p><p></p><p>NO</p><p></p><p></p><p>Have you ever measured a woofer's impedance plot? In a box?</p><p></p><p></p><p>False.</p><p></p><p></p><p>P=IE Power = Current * Voltage. E = IR (voltage = current * resistance) These are the formulas, you can see what can change power.</p><p></p><p>Where the confusion comes in is that a speaker system can be shown as a circuit (see below). This is how we use TS parameters to predict performance. Room/vehicle accoustics and other factors may also act as resistance, capacitance, or inductance.</p><p></p><p><a href="http://www.silcom.com/~aludwig/Sysdes/Thiele_equiv_circuit.gif" target="_blank">http://www.silcom.com/~aludwig/Sysdes/Thiele_equiv_circuit.gif</a></p><p></p><p></p><p>An impedance curve of just a raw driver is more complex than that. Buy WT3 or use a tone generator and get a couple DMMs and see for yourself.</p><p></p><p></p><p>P=IE</p><p></p><p></p><p>I think when Lanzar actually had the Zed made opti line they didn't sell through M&amp;M</p></blockquote><p></p>
[QUOTE="hispls, post: 8090986, member: 614752"] In practice, yes, but only because of changes in impedance at various frequencies. Assuming you could keep impedance constant (or drive a pure resistive load like a planar driver) power should be the same assuming we're in it's useable bandwidth NO Have you ever measured a woofer's impedance plot? In a box? False. P=IE Power = Current * Voltage. E = IR (voltage = current * resistance) These are the formulas, you can see what can change power. Where the confusion comes in is that a speaker system can be shown as a circuit (see below). This is how we use TS parameters to predict performance. Room/vehicle accoustics and other factors may also act as resistance, capacitance, or inductance. [URL="http://www.silcom.com/~aludwig/Sysdes/Thiele_equiv_circuit.gif"]http://www.silcom.com/~aludwig/Sysdes/Thiele_equiv_circuit.gif[/URL] An impedance curve of just a raw driver is more complex than that. Buy WT3 or use a tone generator and get a couple DMMs and see for yourself. P=IE I think when Lanzar actually had the Zed made opti line they didn't sell through M&M [/QUOTE]
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how do brands like boss, pyramid, ssl not get in trouble for false?
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