[Vintage-Audio] AR-4 Puzzle

Thu Jul 3 18:09:03 2003

The easiest way to check phase is with a C or D cell and a
couple wires.  Apply the connection to each speaker with
+ and - to the same relative terminals.  If wired correctly
they should both produce either an outward or inward 
movement of the woofer cone.  It is quick and error-
free.
Bob McKee


> [Original Message]
> From: <[email protected]>
> To: <[email protected]>
> Date: 7/3/03 5:43:01 PM
> Subject: Re: [Vintage-Audio] AR-4 Puzzle
>
> Actually it doesn't make a difference as long as both speakers internally
> are wired the same to the terminals. Remember you not running DC voltage
> to the speakers. Here's a way to test to see if both terminals of each
> speaker are wired the same internally to the enclosure. Connect the top
> terminal of one speaker to the left channel, positive marked,
> amplifier/receiver speaker terminal; connect the top terminal of the
> other speaker to the right channel, positive marked, amplifier/receiver
> terminal. Connect the unused terminal of each speaker to each other. Run
> some audio through the amplifier/receiver so that's it's audible in the
> speakers. Put the amplifier/receiver in the monaural position and adjust
> the balance control to roughly mid-center. If the speakers are wired the
> same ( top terminal of left is the same as top terminal of right ) then
> you should find a spot, when adjusting the balance control, where the
> audible sound of both speakers is minimal or very low. Mark the top
> terminals with a plus, a red dot, a happy face, etc. If the speaker
> terminals of both speakers are not wired the same, rotating the balance
> control will not provide very low audio. i.e. they will be out of phase.
> Pete
>
> On Thu, 3 Jul 2003 16:40:56 -0400 "Duane Fischer, W8DBF"
> <[email protected]> writes:
> > 
> >         
> > Hi All,         
> >         
> > I just received a pair of AR-4 speakers. There are no markings of 
> > any kind to
> > indicate the polarity of the speaker terminal screws. Looking at the 
> > rear,
> > standing vertical, tweeter adjustment shaft to the right: what 
> > polarity is the
> > top terminal?         
> >         
> > If anyone has any specifications on these speakers, such 
> > as:        
> >         
> > type of tweeter        
> > size of mid range/woofer (same speaker)         
> > crossover frequency         
> > actual frequency response        
> > minimum continuous RMS required to drive them            
> >         
> > Thanks guys.         
> >         
> > DBF         
>
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