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Norman Nicolai

Help with AR-2Xa L-Pad and Crossover Wiring

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I am in the middle of replacing my speakersL-pad. The L-pad I am removing has a wire (looks like speaker wire) connecting the #1 and #B terminals. I don’t see it on the schematic I am using. (With my limited electronic reading skills, I should add...) I’m assuming that the previous owner had problems with the existing L-pad and wired them in the “full on” position, rendering them useless.

Is that a correct reading, and should I not replace that wire?

Thanks!

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They’re called “Level Controls” by the same vendor that sells Roy’s Goo online. I assumed they were considered L-pads. Is there a difference and should I have gotten a different product?

Thanks for your help!                       

image.thumb.jpg.e4fafd368055c4e36b1f1b2746095a35.jpg

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I guess I need to go to the Parts Express website and order additional material...

Do you have a link to a schematic that shows where to wire the resistors in?

Again, thanks for your help!

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Look at page15 in the 3a restoration guide.  As long as they are in parallel they can be mounted anywhere from on the lpad to on the driver.  Most are placed on the lpad.  If you are not having your tweeters rebuilt or using the Hivi mod then don't put the resistor on the tweeter lpad.  The lpad alone will boost the output of your old and very tired tweeters if they are still working.   There is no way your tweeters are in good health even if they seem to work.

Adams

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Not my picture, but I keep it around to clarify the wiring of a original pot and a l-pad.

q3M8fWy.jpg

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52 minutes ago, lARrybody said:

Not my picture, but I keep it around to clarify the wiring of a original pot and a l-pad.

q3M8fWy.jpg

Wow, that is an old photo of mine. Today I mount the resistor on the crossover board, and solder the crossover wiring to the L-pad terminals. Should the L-pad need to be replaced in the future, the resistor will not be disturbed.

The Parts Express L-pad is the same item as the one sold by the Ebay vendor mentioned above. 😉

Roy

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Thanks to everyone for your help!

I just ordered the resistors online and should have them by mid-week. If not for Aadams I would not have known about adding the resistor. IARrybody and RoyC’s photos helped too. (BTW, love your goo, RoyC...I assume that’s your stuff I use on my speaker surrounds. I have 4 sets of vintage KLH speakers and they wouldn’t sound as good as they do if not for your famous concoction!) 

I completed re-foaming the woofers a few days ago, so this project is tracking nicely.

I’ll post again after the L-pads are installed and everything is reassembled. I’ve also decided to do a more extensive refinishing on the cabinets even though they are in pretty decent shape, so it may be awhile before I’m back with the next report. I just can’t help myself when it comes to the cabinets. I started down this road initially working on speaker cabinets. Pulling speakers and working on the electronics inside the cabinets is a more recent venture, as evidenced by my lack of knowledge.

Again, I appreciate all the help. As this is my first AR speaker project, I’m psyched and looking forward to actually listening to them!

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The L-pads from Vintage AR will come with instructions. Note that the tabs on the L-pads are not labeled the same as the original pots. It's also labeled on Roy's photo.

  • L-pad 1 = 2,
  • L-pad 2 = B,
  • L-pad 3 =1.

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Got it, thanks. They did come with instructions from Vintage-AR. 
 

 

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