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AR9 help..


cdub92
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I just recently bought a pair of AR9 speakers. I rebuilt the crossovers in the speakers and I’m still having an issue with one of them. The tweeter is shot in one of them.. but, the tweeter attenuation switch is controlling the upper midrange when it is used. Is this normal?? Or do you think someone got the wires switched around? The upper midrange switch is doing nothing when it is switched. I can figure out what is going on with it. Anyone have any ideas? Could it be the resistors? 
 

i replaced the 24uf cap with 2 12uf caps in parallel if that changes anything? It was doing this before the crossover got rebuilt though. Keep that in mind. I want to buy a new tweeter to replace the one that is burnt out, but not before figuring this problem out. I feel as if it will do me no good to order one without the speaker working properly. I’m $650 deep in these and I don’t want to use them for firewood but I will if I need to 

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Should be an easy fix - follow the AR-9 schematic (wires are color coded) to check continuity for the three level switches; it's possible that their leads were incorrectly attached at some point. 

$650 isn't bad, so far - you'd probably be able to part the system out at a profit. Don't burn anything. ^_^

 

 

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2 hours ago, DavidR said:

+1 on what AR_Pro said. Incorrectly wired.

2 x 12uF in parallel is fine for the 24uF cap.

 

AR9xover.jpg

AR9crossover.jpg

Thank you for the reminder images. The first one I have not seen before and looks like it will be very helpful in going over the crossovers. 
 

any recommendation on a replacement tweeter? MW has one I seen. So does simplyspeakers? I think. 
 

thanks for the info,

Caleb

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5 hours ago, DavidR said:

These work very well >>>   https://www.midwestspeakerrepair.com/shop/home-audio/tweeters/dome/mw-audio-mt-4121-75-inch-dome-tweeter/

I use them in my 10Pi and have tried the in AR90 (one cabinet) to compare.

make sure to get the 4 ohm version

Thanks! Also the wiring was wrong on the attenuation switches. It was a quick fix! Thank you for the info! Those are the ones I had my eyes on 

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Did you check the suspect tweeter with a multimeter?  I'd test it, to see if it reads open, before spending for a replacement.  Plus, Vertical Series tweeters pop up often on eBay.  Any of the 9, 90, 91 or 92 tweeters would work.  Even the 58S tweeter, though the color might be different.

Good luck.

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2 hours ago, Stimpy said:

Did you check the suspect tweeter with a multimeter?  I'd test it, to see if it reads open, before spending for a replacement.  Plus, Vertical Series tweeters pop up often on eBay.  Any of the 9, 90, 91 or 92 tweeters would work.  Even the 58S tweeter, though the color might be different.

Good luck.

Hey Stimpy,

yeah, I double checked with my DMM. It read open, unfortunately. I was hoping to be able to find an original tweeter on eBay or on a marketplace. I did find two new old stock from ‘98 on USaudiomart that someone has listed for $125. I feel like that would be a hell of a buy if they’re indeed working. Thanks for the info on the vertical series tweeters. I’ll add them to my saved searches on eBay. 
 

Gratitude,

Caleb

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1 hour ago, cdub92 said:

Hey Stimpy,

yeah, I double checked with my DMM. It read open, unfortunately. I was hoping to be able to find an original tweeter on eBay or on a marketplace. I did find two new old stock from ‘98 on USaudiomart that someone has listed for $125. I feel like that would be a hell of a buy if they’re indeed working. Thanks for the info on the vertical series tweeters. I’ll add them to my saved searches on eBay. 
 

Gratitude,

Caleb

If you get desperate, and feel adventurous, the AR-1MS, and the AR Mid/tweeter plate, used in several versions of the 38B, 48B and 58B, use the same tweeter diaphragm, as the AR-9.  One of those diaphragms could be swapped into the 9 tweeter.  Those tweeters might even use the same magnet assembly, allowing you to remount the whole assembly onto a AR-9 tweeter faceplate.  But, while I've looked up the diaphragm, and know they match, I'm unsure on the magnet assembly.

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