A simple way to check which terminal is which on a speaker is to
connect a c or d cell battery to it briefly, if you have the + to the +
the cone will move out, if you have it the other way round the cone
will move back, mark the speaker with a permanent marker as to
which is which terminal and bob's your uncle as we say over here.
Neil London, England. 82 Imp
---- Original Message -----
From: <RandalPark@xxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Saturday, April 03, 2004 6:31 PM
Subject: Re: IML: Speaker Polarity/Impedance 4,6,8,ohms
> The polarity isn't critical, but the speakers should be "in phase" to
function properly. That means that they are hooked up the same way. When
they are out of phase, one speaker will vibrate the opposite of the other.
An easy way to test this is to hook it up one way, turn up the base, if the
base comes out the back, it is backwards. Both speakers should be connected
in such a way that the base tone emanates out the front of the speaker.
>
> If the original speakers didn't have different connectors for plus and
minus, or if they are not colored or labeled, it really shouldn't matter,
but I generally check it anyway.
>
> If your radio is designed for an 8 ohm speaker and you install a 4 ohm
speaker you WILL damage your radio. It is absolutely critical that you
install the correct impedance speaker for the radio in your car. If your
radio is designed for a 4 ohm speaker and you install an 8 ohm speaker, the
radio will not be damaged, but the sound quality will suffer.
>
> Paul
>
> In a message dated 4/3/2004 9:34:50 AM Eastern Standard Time,
DONALDDICKINSOND@xxxxxx writes:
>
> > Very interesting discussion of front speaker replacement/repair for 67
imperial. Let me ask the experts on the rear seat speaker for my 67
convertible. The rear. as opposed to the front, was a standard size which I
picked up at Radio shack, my questions:
> >
> > 1) How am I sure the speaker is connected correctly (polarity)?
> >
> > 2) I did not get a "small magnet" but the radio seems to drive it OK
(except front to back balance favors the front
> > speaker) what is risk of driving the larger mag?
> >
> >
> > Don Dickinson
> > Prospect, KY
> >
> > 1955 Imperial Newport, Canyon Tan and Desert Sand
> > 1967 Imperial Custom Convertible, Ivory and Burgundy
>
>
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