You can make an impedance matching network that consists of three resistors connected in a pi configuration. On the output side of the radio, you want to put a 16 Ohm resistor in shunt with it's output. The series resistor is a 4 Ohm resistor, and the shunt one with your speaker is a 10 Ohm resistor.
This will give you a combination of impedance matching with 6dB of isolation to maintain amplifier efficiency.
Chris Middlebrook
1962 Custom Southampton
--- On Tue 11/15, < RandalPark@xxxxxxx > wrote:
From: [mailto: RandalPark@xxxxxxx]
To: mailing-list@xxxxxxxxxxxxxxxx
Date: Tue, 15 Nov 2005 01:57:02 -0500
Subject: Re: IML: 65 Crown Speakers: 4 OHM Compatible with 8 OHM Radio???
You
will fry the 8 ohm radio using the 4 ohm speaker, unless you hook it up to another 4 ohm speaker in series. Two 4 ohm speakers in parallel makes 2 ohms (that will really blow up your radio). Two 4 ohm speakers in series makes 8 ohms.
My understanding is (and practical experience so far indicates) that it is okay to use an 8 ohm speaker if the radio can handle a 4 ohm speaker, but it isn't okay to do it the other way around. You might get away with a 6 ohm speaker, but that isn't a good idea either.
Having said all of that, I haven't ever known for sure what ohm speakers the radio in my '65 Imperial has. Its speakers are still the originals. I am assuming that you have established that this radio should came with an 8 ohm speaker.
Paul W.
In an email dated Tue, 15 11 2005 5:39:50 am GMT, Christian Walter writes:
>Hello Everyone---
>
>I'm trying to replace the front speaker on my Model
>367 Mopar
AM/FM radio. I can't locate an 8 OHM speaker
>for the replacement as all shops in my area only carry
>4 OHM in that size (It's a 7" but I'm going to use a
>6.5" with an adapter plate).
>
>I went to our Imperial website and did my research.
>Unfortunately, the advice on the site ranged from "4
>through 16 OHM...it doesn't matter." to "You WILL
>damage your radio if you use a 4 OHM speaker with your
>8 OHM radio."
>
>Which to believe?
>
>1) Will I fry the stock radio by installing the 4 OHM
>speaker?
>Or
>2) Will the 4 OHM work just fine with no real impact
>on my stock radio?
>
>I greatly appreciate any advice!
>
>Thanks...
>
>CHRIS WALTER
>Modesto, CA
>
>
>
>
>
>
>__________________________________
>Yahoo! Mail - PC Magazine Editors' Choice 2005
>http://mail.yahoo.com
>
>
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