posted
What is the relationship between a ported enclosure and the sub's impedance curve? How does changing the enclosure volume effect the impedance curve? How does changing the port volume effect the impedance curve? I am looking for ways to minimize resistance for a given frequency?
posted
You don't really need to minimize resistance as long as the frequency response is flat. Basically, adjusting the volume isn't like a sealed box. It's a complex relationship. Might I inquire as to why you want to lower the resistance. Is it to get more power from the amp?? Any increase won't be significant. The increase in distortion will be more significant than the spl gain.
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Posts: 768 | From: Ottawa, On, Canada | Registered: May 2000
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posted
Yes I want to get the most that I can from my installation. So you are saying that there is no way to manipulate my box to change the impedance enough to benifit me?
------------------ Team "Under Pressure"--coming soon to SE Minnesota for a summer tour wall w/three shocker15's and a cadence a7hc...in a tiny corolla
posted
As the box volume gets bigger then the speakers Vas, the Peak response of the box gets closer to the tuning frequency. So the impedance will also be minimized.
For a tuned box the impedance plot will have two peaks. It will start off with a dc value (AT dc) and will hit its first impedance peak (the speakers first resonance frequency), then it will go back down towards dc, almost touch it. (This point where it is the closest to dc is the frequency the box is tuned to.) The impedance then rises to another peak (the second one) as the speaker hits its second resonance. After this it goes back down but not as close to dc as before and then slowly rises the higher the frequency.
------------------ 2-DD 9512's 2-2000X's (for now) 8.0ft^3 box in a civic trunk One big ass port ?????dB's
It's not the size of your woofer, It's the size of the waves your woofer makes!
Posts: 1259 | From: Fullerton. CA ,USA | Registered: Oct 1999
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