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Acoustic Research AR9's

madtech

Well-Known Member
I have an opportunity to buy a pair of late 70's AR9s for decent price.
Are they worth the effort to re-foam and re-cap ?

Thanks!
 
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yes. Do a search here, well regarded. Might not need a recap and will be $$$ on this speaker. Foam is EZ on these.
 
Depending.........on how good a price, etc. They are typically considered a very good classic/ vintage speaker providing you have an amp with enough current to drive them! I had a set and bi-amped them for great effect. A Hafler DH 500 on the woofer end and a good 100 wpc for the top end should work very nice.

As for recapping & refoaming it is typical to recap the upper end (the 8" and up network found inside above the lower network of big cans). The refoaming is usually the 8" and the two 12"- be sure to make sure the spiders are not sagging on the 12"s= if they are sagging then they will need rebuilding $$$! Lastly you can refinish the cab if you like.

They are truly nice speakers and well worth ones time to aquire I think- good luck!
DC
 
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Install the woofers 180 deg out from what they were when you got them (rotate them so top is bottom and bottom is top). That should help with spider sag.

The AR9 is a super speaker, but you will need serious power to drive them to satisfactory levels. If you try to drive them with under-powered amps, you will tend to drive the amp into clipping, trying to get decent volume out, which will burn out your tweeters and midrange drivers...clipping hits a limit on base power, which is where most of the the loudness lives (see Fletcher Munson Curve). From there you can still increase the power in the midrange and tweeter frequencies, shifting the power distribution upward, as the speaker sees it, sending too much power to the midranges and tweeters, trying to get the volume up. This can result in frying those drivers.

Enjoy,
Rich P
 
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I have an opportunity to buy a pair of late 70's AR9s for decent price.
Are they worth the effort to re-foam and re-cap ?

Thanks!

No more than 8 bills in excellent shape would be more than fair considering if you were to hire a shop to update the drivers requiring foam work (and they will, even if there appears to be no seperation) the cost would be significantly higher. Drive them with a sufficient high current power amplifier.
 
Thanks for the advice guys. I'll be checking them out tomorrow night. With a bit of luck and some heavy lifting hopefully I'll be bringing them home with me.
 
A true classic. I still remember when they came out. Over 30 years later, still sought after. Can require some time and effort to bring up to spec but well worth it. Your 555 and 216 should do the trick. Maybe biamp them for fun.
 
They're in the house for $300 Canadian bones! Heavy as hell and in minty condition. Lots of work ahead. I can hardly wait to hear these babies launch!

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Oh you DAWG!!! Those are definitely on my list. What speakers have you been listening to? I'll definitely be following this thread to see how they work out for you...so keep us updated.
 
Argruph! Those look fantastic! AR drivers are typically very easy to refoam, at least in my experience. Dang, boxes and everything for a really good price! Well done and congrats. I'm going to get a pair of those one day, but I suspect I'll end up paying more.
 
When you get those restored you will be floored..a classic 'scroe' if I ever seen one..

Those do need some power..no HT receiver here..a nice Adcom 555 or the like and you shall be released:D

Matt.....tubeornotube
 
Nice pickup! As others have said Great set of speakers! You do need Major power that can dip to below 4 ohms for those to sing.
 
I just got mine set up in my new place this weekend, you will surely not be disappointed... :D

I'm also a bit jealous of what you paid for yours... :eek:

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