passive crossovers before an amp?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=87161
Printed Date: May 15, 2025 at 9:49 AM

Topic: passive crossovers before an amp?

Posted By: bill/t/d/y
Subject: passive crossovers before an amp?
Date Posted: December 13, 2006 at 8:50 PM

What will it hurt to put passive filters or x-overs B4 an amp??Haven't seen this done ,that I can find referance for,in years.Is there a reason that it has stoped being done?All i see is filters ect after the amp and b4 the speaker.

One would think filtering b4 the amp would work the amp less (less input to process)and even potentialy lower distortion by filtering out unwanted freqs prior to amplification.Or am i bass ackwards as usual.Haven't worried about sound systems this much in about 19-20 yrs maybe.

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Hey bubba watch this!!

Replies:

Posted By: aznboi3644
Date Posted: December 13, 2006 at 10:47 PM

Only way to do that is if you're using a line level converter or the amp is high level inputs...can't really do it to rcas lol.

I doubt it would make any difference in the sound...the crossover slope would be weird...amps crossovers dont really have to work hard at all

Posted By: Steven Kephart
Date Posted: December 13, 2006 at 10:59 PM

It probably won't work. Passive crossovers take into account the impedance of the speaker, which wouldn't be present on the low level side. What you need is an active electronic crossover, or better yet a digital crossover.

Posted By: haemphyst
Date Posted: December 14, 2006 at 2:46 AM

Sure... Do it all day long, with these!

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: bill/t/d/y
Date Posted: December 14, 2006 at 6:19 PM

Thanx all.

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Hey bubba watch this!!