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-   -   Took advantage of my high pass filter on HU, question... (https://www.caraudioforumz.com/general-discussion-10/took-advantage-my-high-pass-filter-hu-question-215085/)

Nagamitsu 05-07-2010 02:36 PM

Took advantage of my high pass filter on HU, question...
 
Didn't quite realize that changing the high pass filter setting on my deck would clear up the distortion I was getting on the components when the volume was cranked. But curious, what difference if I set at 80hz or upwards of 160hz, which seems to be the setting range?

I have at 80hz now, and no distortion, nice clean sound at high volume now on the front end. Just dunno what changes going higher on the setting? :dunno:

Dukk 05-07-2010 02:39 PM

The higher you go the less bass from your components and the more power available from your deck/amp to play the range you want the speakers to recreate.

Ideally the highpass for the speakers should be at the same, or within an octave, of the lowpass for the subwoofer. Since most cars are very 'sensitive' in the 80-150hz range you can generally get away with a gap if your front speakers need a higher setting to sound best.

Nagamitsu 05-07-2010 02:53 PM

Thanks! Much appreciated! It sounds quite fine at 80hz, but I guess there's always room to fiddle with settings a bit. Right now, mids/tweets sound just right, filters are set as "thru" for the subwoofers.

DeadlySones 05-07-2010 03:20 PM

Not good for the subs.... set them to 80hz also. :)

Nagamitsu 05-07-2010 03:44 PM


Originally Posted by DeadlySones (Post 573013)
Not good for the subs.... set them to 80hz also. :)

Wouldn't they be separate, settings wise? If I adjust for the front components, the subs set as thru should be ok, no? Is there a reason to balance the subs to 80hz?

sunfired 05-07-2010 08:08 PM

Subs set at 80hz and below, comps et at 80hz and up.... you prolly have your amp set on lowpass anyways tho right?

Nagamitsu 05-07-2010 11:40 PM

Amps don't have individual settings other than gain. Ok, on the head unit, there's high pass front, high pass rear, high pass sw (subwoofer).

Front set at 80hz now. Rear is default, "thru", no rear speakers. Subs set to "thru", meaning head unit should be passing without filter to the subs.

If there's low filter settings, I've not gone that far or adjusted those in any way. I'd assume they are default, passing/allowing the amp to put direct to the subs.

sunfired 05-08-2010 12:02 AM

Should be able to set the sw to low pass, and set it to 80 hz to match the point of the hi pass.

sunfired 05-08-2010 12:07 AM

page 21 of ur manual, u can dl it here if u dont have it. Kenwood - KDC-X493

Nagamitsu 05-08-2010 06:15 AM

Thanks, I'll check about low pass at 80hz on the subs. It sounds fine right now though. I thought the subs being on own/separate RCA, specific subwoofer channel from the head unit, that it wouldn't matter. I guess to do this is more to just match it up to what the front end is now?

DeadlySones 05-08-2010 06:36 AM

it stops your subs from attempting to play higher frequencies. Setting at 80hz the power is concentrated in the 20-80hz range. Set to "thru" it will play from 20hz - whatever the subs natural roll off is (sometimes 150-300hz) and that can damage coils by creating heat with no motion.

Nagamitsu 05-08-2010 07:52 AM


Originally Posted by DeadlySones (Post 573166)
it stops your subs from attempting to play higher frequencies. Setting at 80hz the power is concentrated in the 20-80hz range. Set to "thru" it will play from 20hz - whatever the subs natural roll off is (sometimes 150-300hz) and that can damage coils by creating heat with no motion.

Done! Thanks! Did not realize this. So basically limiting the sub to a max of 80hz for the high end, I did not know.

Sinemeup 05-08-2010 09:13 AM

80hz is the low E string on a regularily tuned guitar, 160hz is the E played on the 7th fret of the A string... If I was going to listen to a band I would want to hear 80hz as much as I would want to hear 40 and 160

DeadlySones 05-08-2010 09:18 AM

what are you talking about.... He will still hear 40, 80, & 160hz....

His sub will play 20 - 80hz, and his mids will pick up from 80hz up... I don't see the problem.

martyandrew123 05-23-2010 11:16 PM

I have a low pass filter on my kicker amp


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