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-   -   Equalization (http://www.diyaudio.com/forums/car-audio/107534-equalization.html)

Vaughan 26th August 2007 06:26 PM

Equalization
 
Hi there,

I need some advice. In order to flatten the low frequency response in a car, what are my options ?

Are there any parametric equalizers used in cars ?

I am getting a parametric EQ for home use called the Velodyne SMS-1 tommorrow which I've been told is exceptional. But now I need something for the car. The way I see it, if there is a big peak at 60 hz or any specific frequency, it could be problematic.

So what do you guys do in this case ? It's not as if there are cabin acoustic treatments, right ? If you want a nice relatively flat response where the bass is not predominently boomy because certain frequencies are overpowering others, I have to assume that parametric EQ or something similar is the means to do this.

What are your thoughts ?

--Regards,

Perry Babin 26th August 2007 07:58 PM

If there is a sharp peak, the box may be too small for the woofer or, if it's ported, the port tuning frequency may be too high.

Vaughan 26th August 2007 08:11 PM

For those who don't use big enclosures but would like a small form factor, are there ways of smoothing the response with EQ ?

--Regards,

Perry Babin 26th August 2007 08:30 PM

You can smooth the response with an EQ but it's better to get the enclosure right. There are speakers designed to work in small enclosures. The correct speaker/enclosure combination may be a less expensive alternative than a parametric EQ.

Vaughan 26th August 2007 09:28 PM

The problem is that I'm not sure that the installers would be able to build the correct enclosure size. If I go to a car audio shop and purchase two 12" Pioneer DVC-12's (obviously there will be an enclosure size that is appropriate for those drivers) the technicians don't have custom made enclosures.

They've just got enclosures designed for 12 " or dual 12" drivers. That isn't ideal because the T/S parameters will vary from driver to driver. And I'm not handy with a saw. :D

This is why I mentioned EQ.

--Regards,

theAnonymous1 27th August 2007 07:55 AM

If your box is sealed I suggest a linkwitz transform.;)

Vaughan 27th August 2007 04:33 PM

Okay, besides a linkwitz transform ( :D ) and besides having the enclosure built perfectly for a given driver, what other alternatives do I have to flatten the response and get rid of overwhelming boom ?

Is there a way to calibrate the bass from the subwoofer to integrate with the mains ?

--Regards,


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