VERY CLEAVER! I like that. Anything to enable bench testing is always a plus for me! Paul In a message dated 4/3/2004 2:08:57 PM Eastern Standard Time, nt014b6628@xxxxxxxxxxxxxxxx writes: > > > 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 > > > >