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Help, Acquired speakers that have three post.

R

Robert Guy

New Member
Hi everyone, I could really use a hand here. I've acquired a couple of older speakers that have three post. They are labeled T, 1, and 2. I have no idea how to set them up properly and any directions would sure be appreciated.
 
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Robert Guy said:
Hi everyone, I could really use a hand here. I've acquired a couple of older speakers that have three post. They are labeled T, 1, and 2. I have no idea how to set them up properly and any directions would sure be appreciated.
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We're going to need more than that to provide any help. What make and model are the speakers? Is there any other text or labels near the terminals? Can you take a picture of what you're looking at?

bs
 
Robert Guy said:
Hi everyone, I could really use a hand here. I've acquired a couple of older speakers that have three post. They are labeled T, 1, and 2. I have no idea how to set them up properly and any directions would sure be appreciated.
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Pics would be helpful
 
gkimeng said:
Sounds like AR speakers with missing tweeter jumpers. Pics needed to confirm.
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It does sound like an AR (like a 2ax, 5 or 3a). Speaker terminal #1 is common (-). Speaker terminal 2 and T should have a jumper wire going between them, and that is the positive terminal (+).

One of the most stupid labeling inputs of all time. I blew up an amp on a brand new pair of speakers (and the amp) because of mis-understanding the input configurations (I was about 17 at the time).

If you are handy with a multi-meter, you can verify.
 
Yes! it is exactly like that including the mid and hi adjustments, also like in the pic, the back seems to be a solid piece of 3/4 or 4/4 ply by the sound of it. : )
 
These are most likely three-way speakers from Acoustic Research. The prescribed method for wiring is to run the positive (+) wire from the amplifier channel to the "2" terminal, and the common (-) wire to the "1" terminal. For all three drivers to receive amplifier current, you need to have a jumper wire connected between the "2" and "T" terminals as shown in the pic from post #10. The MID and HI controls regulate the output of the midrange and tweeter, respectively, and these old controls very often require servicing in order to get them to function properly. The only way to get at them is to remove the woofer to access the cabinet interior.

Which model number are your speakers?
 
with radio shack drivers they are no longer ARs.

like putting an LS/LT engine in a Ford, not a ford any more.

But could be better performance...
 
Robert Guy said:
When trying to determine the impedience then, would I hook up my multimeter pos to T&2 and neg to !?
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Robert Guy said:
There size and weight suggest they are or were AR 3A's, the previous owner replaced the drivers with radio Shack drivers
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Since someone has been in there and changed things out to be non-original, I would pull a woofer and trace out the wiring. I would not trust that they kept the wiring the same.
 
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