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Date: April 01, 2002 at 10:39:13
From: Brian Owens, [newhq.paccar.com]
Subject: Re: Sub/amp configuration questions (lots of them)

URL: My Webpage. . .


If wiring the coils in series raises the Qts, what does wiring the subs in series do to Qts?

After being told by Madisound that I should avoid wiring subs in series if possible (I was buying a pair of 4 ohm drivers to build an MTM speaker. Madisound highly recommended I use a pair of 8 ohm drivers and use an amp that could handle a 4 ohm load when they were wire in parallel), I found this on the JL site. . .same thing madisound told me:

"The problem with this, is that it is less desirable to wire subwoofers in series to each other (as opposed to parallel). Because of slight and unavoidable differences between speakers and because of the high likelihood of uneven loading between different speakers in a car, there will be slight differences in the mechanical behavior of the two speakers in series. These differences in movement result in induced voltage (called back EMF) being created by the speakers across the series connection. This effect causes a problem when two speakers which behave differently are connected in series because the speakers can modulate each other (cause each other to move), resulting in distortion. The problem becomes more serious as more speakers are connected in series."

Any comments?

Brian


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