[legaspi89]

I'm currently running the Audio Control LC7I to the Alpine PDX Amp to my Morel Tempo Ultra 6.5 602 Component Speakers. The system sounds great, however on certain songs(Good recording songs) like Dj Quik - Pitchin on a Party for example, while give out a slight rattle coming from the speaker. And this is just certain songs, that my speaker will have this slight rattle, not distortion, just like bad bass frequency coming through the speaker. Got the speakers crossed over at 80 Hz which sounds perfect. Its just very few songs that makes my morel speakers have that slight rattle sound. So Can A DSP properly tuned in my car fix this issue?

 

[metanium]

Short answer- yes. If certain frequencies cause an audible resonance, you can certainly tune it out w/DSP However, the resonance can possibly be caused be inadequate installation or insufficient sound deadening. If you correct the resonance be securing the mounting of the speaker or adding sound deadening, you can eliminate the noise without having to EQ those frequencies out of the mix.

 

[legaspi89]

Well Said. Thank you for the reply. I'm better off going over the installation, connections, and possibly add more sound deadening before installing a DSP. Thats what i'm going to do tomorrow, and start investigating the cause of it.

 

[Randyman...]

Make sure the speaker is mounted true and the basket is not being deformed due to an un-true mounting ring or non-flat door metal or whatever (possible coil rubbing). First suspect is likely the doorcard and factory grille/opening itself IMO. Possibly the foam door-card rings interfering with the driver surround. Does it vary with volume - or is it basically always there on songs that aggravate the issue?

And additionally - if that 80Hz is too low or not steep enough and this is an over-excursion thing, and you have limited options "as-is" - a DSP could help with more granular x-over choices/slopes as well...

 

[ckirocz28]

Well Said. Thank you for the reply. I'm better off going over the installation, connections, and possibly add more sound deadening before installing a DSP. Thats what i'm going to do tomorrow, and start investigating the cause of it.

Before you take anything apart, you should watch the speaker cone while playing that song at the offending volume level to see if it's over-excursion causing the noise. Over-excursion would indicate that you need a steeper crossover slope or higher crossover frequency, the steeper crossover slope can be had with a dsp, or maybe your head unit.

 

[kaijerke]

It’s possible your lc7 is clipping at those frequencies (their amplitude being higher than the others) and causing the rattle you hear. I was having that issue with my dash speakers and thought they were broken, turns out my inputs were clipping.

 

[LBaudio]

DSP is not ment as a bandaid for poor install or install related issues. But, you definitely can lower the amplitude of the "part of problematic spectrum" and leasen the problem you have.