earthquake SLAPS system
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=22271
Printed Date: May 13, 2024 at 10:16 AM
Topic: earthquake SLAPS system
Posted By: ricetech
Subject: earthquake SLAPS system
Date Posted: December 02, 2003 at 10:29 PM
www.earthquakesound.com/slaps.htm
what exactly do these do??? will they work with any sub? the website wasnt really clear on this. has anyone used these before???
Replies:
Posted By: Durwood
Date Posted: December 03, 2003 at 12:28 AM
They're "passive radiators", and they've been around for a long time. You see them more in home audio than in car audio, but the theory is the same. Think of it like a subwoofer cone with nothing attached to it - no voice coil, no motor, no magnet. You mount the radiator in a sealed box, along with a subwoofer. As your subwoofer cone moves out, the passive radiator "cone" moves in, and vice versa. They allow you to pick up a little bit lower frequency extension because they mimic the effects of a slightly larger box. The net effect is somewhere between a sealed box and a ported box.
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