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amps and speakers

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=33019
Printed Date: July 14, 2025 at 4:25 PM


Topic: amps and speakers

Posted By: mnemesis
Subject: amps and speakers
Date Posted: May 31, 2004 at 2:51 AM

Just wondering if when you are running a 3 or 4 way speaker off an amp whether or not you need to put in a crossover? Thanx



Replies:

Posted By: DYohn
Date Posted: May 31, 2004 at 10:20 AM

It depends.  "3-way" or "4-way" (or 2-way) speakers always contain internal crossovers for the high frequency drivers, or in higher-end models include external crossovers.  These should always be used (except in very specialized and advanced installations.)  But since most small cone woofers (like most 5.25 or 6.5 inch speakers) cannot produce much bass, so it can be a very smart thing to add a high-pass crossover to protect them from the low frequencies they can't produce anyway.

Also, a subwoofer ALWAYS needs a low-pass crossover of some type regardless of the other speakers in the system.  It is common to use an external crossover for this, and many of them will include a high-pass output for the main speakers.



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