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AR-4X wiring question


Anthonyv62

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Been a longtime visitor and occasional participant going back to 2002-2003. Haven't posted much over the years because I've ALWAYS found answers to my questions elsewhere on this website and the informative discussions.    

Looking at AR-4X wiring diagrams, and countless photos of their crossovers, the yellow (+) tweeter wire soldered to pot terminal B and dark green capacitor and green tweeter wires to pot terminal 2 seems to be the most common. My speakers (serial # FX74042, FX74072) have that yellow tweeter wire and dark green capacitor wires going to pot terminal 2 with the green tweeter wire soldered to terminal B.

After restoring the cabinets I'm ready to hit the crossovers by replacing the badly corroded original potentiometers with correct L-pads and new Dayton capacitors. Is it better to wire the crossover according to AR-4X wiring schematics or wire them like my originals?

Happy Holidays!  

Edited by Anthonyv62
correct a possible mistake
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  • 2 years later...

I have managed to thoroughly confuse myself with the correct L-Pad wiring (with resistor).  Yes, I'm somewhat of a novice, but fairly capable, and do better with pics than schematics.  After re-gluing the detached tweeter cones, I was all ready to go, with parts in hand, photos from other restorations, and some understanding (so I thought) of what goes where. 

Once I dug in to get the cap, resistor, and L-Pad in place, I realized most of what I had referenced online had the green wire connected to the "B" terminal on the original pot.  Mine have the yellow tweeter wire connected to the "B" terminal and the green tweeter wire connected to the "2" terminal along with the green wire from the original cap.   The blue wire from the cap is connected to the positive input.

I have already set up the L-Pad wiring as seen in a photo posted by JKent, i believe, with the resistor connected to yel/grn wires with disconnects, so I still have some flexibility to get this right without too much difficulty.  However the wiring on the original pot does not match mine.

I'm making some edits to my post as I sort this out.  Based on the side-by-side pic and L-Pad instruction diagram, it seems that for me, the cap should be on tab 3 of the L-Pad and the yellow wire should be on tab 2 of the L-Pad.   So, basically just flipping the yellow and green wires as shown in the first pic.Are the tweeters marked for polarity?  I haven't one of them to look.  Does the "B" terminal on the original pot represent + polarity?

I'd be grateful if anyone can correctly confirm which L-Pad pins get which wires!  Thanks!

L_pad.jpg

IMG_8923.JPG

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I provided the photo to Kent (and others), but it shows the wires of the AR-3a mid, not the 4x tweeter. The numbering of the terminals is the important part. Disregard the wire colors. It is meant to illustrate the corresponding numbers of the original pot relative to a modern L-pad.  Simply connect your 4x wire formerly soldered to #1 pot terminal to #3 L-pad terminal, etc.

Roy

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