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Fighting with ford factory DSP, possible junk sub.
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<blockquote data-quote="stones" data-source="post: 8629255" data-attributes="member: 540734"><p>I have tried a sealed 1.3 and have moved it into a 1.8 tuned to 34hz, sensitivity did not increase as much as I expected and it sounds basically the same as the sealed box so I suspect the audio signal is the main cause for my issues.</p><p></p><p>To evaluate the signal I ran a tone generator app on my phone then played various tones through the stereos bluetooth connection. I connected multimeter leads to the amps outputs leaving the sub disconnected.</p><p></p><p>All equalization set to flat, ford volume compensation off, crossovers wide open, just pure unmolested signal.</p><p></p><p>The AC output from the amp terminals through the varied tones show that the amp is getting a bizarre signal to work with, voltage drops sharply below 40hz, barely registering a single volt at 20hz but climbing to 37v at 50hz.</p><p></p><p>Even with the LC2i the voltages are all over the place from 20hz to 100hz in a sharp bell shaped curve centered in the 50-60hz range.</p><p></p><p>Its hard to give blame to the sub when it is being fed such a terrible signal but right now it sounds awful.</p><p></p><p>here are a few reviews of the sub-</p><p></p><p><a href="https://www.sonicelectronix.com/i38107_Earthquake-Sound-DBXI-12D-Product-Reviews.html" target="_blank">https://www.sonicelectronix.com/i38107_Earthquake-Sound-DBXI-12D-Product-Reviews.html</a></p><p></p><p>here is the install manual-</p><p></p><p><a href="http://www.earthquakeeurope.com/Products/Car-Audio/Subwoofers/DBXi/DBXi-12D/Pdf/US/DBXi-12D_manual_US.pdf" target="_blank">http://www.earthquakeeurope.com/Products/Car-Audio/Subwoofers/DBXi/DBXi-12D/Pdf/US/DBXi-12D_manual_US.pdf</a></p></blockquote><p></p>
[QUOTE="stones, post: 8629255, member: 540734"] I have tried a sealed 1.3 and have moved it into a 1.8 tuned to 34hz, sensitivity did not increase as much as I expected and it sounds basically the same as the sealed box so I suspect the audio signal is the main cause for my issues. To evaluate the signal I ran a tone generator app on my phone then played various tones through the stereos bluetooth connection. I connected multimeter leads to the amps outputs leaving the sub disconnected. All equalization set to flat, ford volume compensation off, crossovers wide open, just pure unmolested signal. The AC output from the amp terminals through the varied tones show that the amp is getting a bizarre signal to work with, voltage drops sharply below 40hz, barely registering a single volt at 20hz but climbing to 37v at 50hz. Even with the LC2i the voltages are all over the place from 20hz to 100hz in a sharp bell shaped curve centered in the 50-60hz range. Its hard to give blame to the sub when it is being fed such a terrible signal but right now it sounds awful. here are a few reviews of the sub- [URL="https://www.sonicelectronix.com/i38107_Earthquake-Sound-DBXI-12D-Product-Reviews.html"]https://www.sonicelectronix.com/i38107_Earthquake-Sound-DBXI-12D-Product-Reviews.html[/URL] here is the install manual- [URL="http://www.earthquakeeurope.com/Products/Car-Audio/Subwoofers/DBXi/DBXi-12D/Pdf/US/DBXi-12D_manual_US.pdf"]http://www.earthquakeeurope.com/Products/Car-Audio/Subwoofers/DBXi/DBXi-12D/Pdf/US/DBXi-12D_manual_US.pdf[/URL] [/QUOTE]
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Fighting with ford factory DSP, possible junk sub.
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