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General Car Audio
Heads up on polarity testers and crossover slopes.
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<blockquote data-quote="Taxed1" data-source="post: 8874358" data-attributes="member: 683555"><p>Just a heads up people. I just finished installing a new component set. I made sure it was all wired properly, positive to positive and negative to negative. I wanted to double check everything with free polarity tester app from the iOS store. The new components all tested fine but my existing subs were showing as reversed. I was stumped. I double checked everything. I can physically follow the wires out of the amp into the back of the sub. I even tried with a 9v battery & it’s wired correctly. Then I noticed that the polarity tester app sends a thump around 90-120hz. Then I realized I am using a low pass crossover of 60hz with a -24dB slope. I forgot that when using that slope the polarity switches 360 degrees at the end giving me a false reading on the tester. As soon as I dropped the slope to -12db the tester said I was good. So yeah, all that for nothing wired wrong. What’s your favorite slope?</p></blockquote><p></p>
[QUOTE="Taxed1, post: 8874358, member: 683555"] Just a heads up people. I just finished installing a new component set. I made sure it was all wired properly, positive to positive and negative to negative. I wanted to double check everything with free polarity tester app from the iOS store. The new components all tested fine but my existing subs were showing as reversed. I was stumped. I double checked everything. I can physically follow the wires out of the amp into the back of the sub. I even tried with a 9v battery & it’s wired correctly. Then I noticed that the polarity tester app sends a thump around 90-120hz. Then I realized I am using a low pass crossover of 60hz with a -24dB slope. I forgot that when using that slope the polarity switches 360 degrees at the end giving me a false reading on the tester. As soon as I dropped the slope to -12db the tester said I was good. So yeah, all that for nothing wired wrong. What’s your favorite slope? [/QUOTE]
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Heads up on polarity testers and crossover slopes.
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