Jump to content
The Classic Speaker Pages Discussion Forums
tuskman79

AR9 question- no sounds from Tweeters

Recommended Posts

It could be the attenuation switch but for both to go bad is unusual. It could also be a bad capacitor. Best way to determine if the tweeters are good or not is to remove them and take a DCR reading of the voice coil. Should be around 3.5 ohms IIRC.

Share this post


Link to post
Share on other sites

I've never encountered a blown tweeter on an AR-9, but I've also never encountered a level-control switch that was any worse than intermittent.

The simplest check would be to lay them on their backs, remove the tweeters, and test with a reliable meter.

Do you have photos of the speakers?

Share this post


Link to post
Share on other sites

Perhaps the 6uF Callins capacitors in the tweeter signal path failed altogether.   One went bad in my AR9's, but I was getting very low output and some low level noise from the tweeter as opposed to no sound at all.    The same capacitor in the left speaker was incredibly off spec (400%) but still hanging on for dear life.   I understand that the 6uF Callins are especially notoriously for going bad.   I don't know how long it would take for those caps to die altogether or if they would eventually cause the tweeters to fry.

Share this post


Link to post
Share on other sites

The tweeters use an 18db per octave crossover, so I would hope they haven't been blown.  It would be very unusual for both tweeters to be dead.  As such, did you try more than one source, and several recordings?  The reason that I ask, is the 9 and 90 cross fairly high up to the tweeters.  They're almost super tweeters.  So, is it possible that the tweeters were working, but the musical selection didn't exercise their range?  Too low to notice?  Still, for a pair of AR9s, I wouldn't give up so easily.  If it does turn out to be defective tweeters, start with a lower offer; maybe around $300/$350.  Work up from there.

Good luck!

Share this post


Link to post
Share on other sites

Thanks for the replys. I do not have any photos but they look good.  Slight lower grill pilling and one small veneer chip on the lower front corner.   I tried 4 different CD’s of different styles of Music- classical, 70's Rock, newer Pop, Soul.  Absolutely not the slightest sound came out of either tweeter on any recording and I jiggled the attenuation switches while listening with my ear up  to them.   Unfortunately I would have to roll the dice and buy them and then proceed with the diagnostics once I got them home.  Just don’t want to have more into them than they are worth.

Share this post


Link to post
Share on other sites
3 hours ago, tuskman79 said:

Thanks for the replys. I do not have any photos but they look good.  Slight lower grill pilling and one small veneer chip on the lower front corner.   I tried 4 different CD’s of different styles of Music- classical, 70's Rock, newer Pop, Soul.  Absolutely not the slightest sound came out of either tweeter on any recording and I jiggled the attenuation switches while listening with my ear up  to them.   Unfortunately I would have to roll the dice and buy them and then proceed with the diagnostics once I got them home.  Just don’t want to have more into them than they are worth.

 

Well, it's good that you did a decent audition on the speakers.  Plus, listening to the tweeters with your ear directly over it, is about all you could do in an owner's home.  Kind'a hard to pull out a screw driver and a multimeter and ask to take the speakers apart!  But, if you get the speakers, it' going to be bad tweeters, or bad caps, or more likely both.  And you already know that the switches could use a cleaning too.

As to value and restoration costs, most here feel the AR9s are worth it.  That you'd have to spend far far more than what this investment might be, to match the sound quality of the 9s, with a new pair of speakers.  So, I wouldn't worry too much about exceeding their resale value, as you probably won't want to sell them, once they're 100% functional.

Share this post


Link to post
Share on other sites
1 hour ago, DavidR said:

If you are near MA and don't want them let me know cuz I do

David - if these are on Craigslist, Search Tempest shows three AR-9 listings extant: Southern Ilinois ($400), Greensboro ($1500), and Huntsville ($1300). The ones in Alabama seem to have replacement mids.

https://carbondale.craigslist.org/ele/5994316419.html

https://greensboro.craigslist.org/ele/5978935320.html

https://huntsville.craigslist.org/ele/5977334576.html

On eBay, there's a pair in New Rochelle for $1850, and they're "rare" and "minty".

http://www.ebay.com/itm/Rare-Minty-AR9-Speakers-Beautifully-Restored-Refinished-Owners-Manual-last-one-/252518087529?hash=item3acb403b69:g:GwoAAOSwjVVVz11t

Share this post


Link to post
Share on other sites

Thanks Steve. I've had my eyes on the New Rochelle pair for a while. Xovers are untouched except for the addition of upgraded binding posts. New Rochelle wouldn't be too bad of a ride for me. A tad pricey.

Share this post


Link to post
Share on other sites

Been responding on this over at AK.  I would agree to a price with the seller first with a contingency that you get to pull them and test them real quick and that they don't test open.  Easy to do on the spot.  Could be something as simple as for some reason the crimp connections have come off.  Seen it happen - the ADS 910's I purchased.  If they test open, you can see at that point if he would take maybe $100 less.  Those will coast probably at least $100 each or a member might be able to give you a good deal on a pair.  I recently picked up spare mids and mid woofers for mine for $150 total.

I asked over at AK too, but if you tell us the price we might be able to give you some more to go on in terms of how much to worry about in terms of financial risk here. And yeah, dont worry about the grille fabric.

Did you take a close look at the woofers and the surrounds there?  These are all old enough they likely need replacing.  Same with the mid woofers on front.

Share this post


Link to post
Share on other sites

2-19-17

When I purchased my AR-9's about two years ago, the tweeters were burnt. I found this out after I had already re-foamed all of the speakers.

I was fortunate as I contacted the seller and we agreed upon a $200. refund and this was done two weeks after the sale. This was done on the auction-site and I almost could tell in his dialog that he may have been aware of the tweeters being burnt but, he quickly made the refund just the same.

Price I paid was $700. minus the two hundred so, overall a great deal. They're in excellent condition cosmetically, only waiting for a 're-cap'. I have many HV and ABTech spares so in essence, I was satisfied in the end.

tried 'bi-amping' them with  two Phase Linear PL400's, but presently I'm using a single Phase Linear PL700 Series II.

I tend to prefer the single bigger amplifier's control over them.

How do I like them? Personally, I prefer my LST's as I've gotten use to them in the past 20+ years of listening to an almost non-direct speaker's output radiation of sound.

I find the AR-9's still portray the AR sound, and bigger as the LST's do compared to lesser models, not louder, simply, bigger. I find the AR-9's can produce more potential volume units as they absorb wattage easily but don't absorb as much as the LST's. That is what was build into them by design, or so I've read because AR made AR-9's more 'amp-friendly'.

Good luck and rest assured, they're probably AR's last top quality speaker, hands down and worth doing whatever's necessary to bring them around. They're in another class compared to previous AR models, no doubting that as I feel they have a more 'up-dated' sound, whatever that means to most of the world.

 

Late afternoon today, I ran into a guy at B&N record dept. who claims to have custom built amps, a custom cd player and big 'Martin-Logans'. He spoke of huge Aragon amps, the last and biggest they made and expensive AC cords.

I thought whooped-dee-freaking-doo. 

We became talkative, dropping names, etc. and we planned on hearing each other's systems. Though, it was clear that he, a CD guy and that I was 'Vinyl-guy'.

He was clearly at least 10 years younger than I and I felt I shouldn't have excused his lack of not knowing certain 'vintage' stuff,  because he seemed to draw a facial blank when I mentioned some of my components name's and especially their ages.

He spoke of going to 'his-guy' and his 'dealer' to do his 'mods' and repairs. I also made it clear that I do my own 'mods', 'set-ups' and repairs and have so since at least 1967. Correct, 1967 and before that with my car's radios and before that with father's radios the had from the '30s and '40s that I played with as a pubescent kid before that!

I almost sheepishly warned him that my system is total and completely 'vintage' except for my phono cartridges which considered 'high-end' and new.

His refrain was; "don't worry", and that he claimed he understood where I was coming from.

Again, whooped-dee-freaking-doo! 

Maybe I conceded and humbled too quickly, then again this could turn into the 'Battle of the Systems", old and new?

Sorry to drop and butt-in on this post. 

Although, I do predict, he'll flip-out when he sees the AR-9's compared to his ML's. Not to mention my little 'LST' fest I might overwhelm him with. Either way, I plan to hear his system first and then we'll enjoy mine.

FM

 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...