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Old 6th December 2013, 07:53 PM   #1
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Default Acoustic Research AR 9 rebuild

Starting a rebuild of a set of Acoustic Research AR 9s.

Structurally the towers are in good condition, but all speakers inside need refurbishing/replace.

I do not know where to start. Is it even worth it? My wife thinks it is not. The project guy in me thinks it will be fun and a good learning experience.

Where should I start?

I will need 4 woofers I know that for sure. I don't know what kind to buy. I would like as close to factory or better.

I think the tweeters are good. I really cannot tell. (How do you tell if you need new tweeters)

All of the mids need replacing (I think there are two different kinds of mids on each tower), I do not know where to start.

Any guidance on the subject will be a great help.
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Old 6th December 2013, 07:59 PM   #2
tinitus is offline tinitus  Europe
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clever wife you have

sorry, not funny, but couldn't resist
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Old 6th December 2013, 08:14 PM   #3
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Acoustic Research - The Classic Speaker Pages Discussion Forums
Go to the above site which is the AR classic speaker rebuild page and look for what you want or follow the links as it relates to your AR9.

As far as replacement speakers look up Acoustic Research Parts From the same Manufacturer AR has been using since 1983! for the speaker types you might want or use as replacements. These are about as close to original as you can find.

Suggest you download this document so you can understand what you are up against in doing the update for the AR9. The document is specifically for the AR3a and some of the info may apply to your needs.
Restoring the AR-3a | The Classic Speaker Pages

I have got my replacements for my AR3a from AB-Tech and have had no issues.

A very worthwhile winter project.
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Old 6th December 2013, 08:20 PM   #4
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Here is a current diyaudio post on updating the crossovers for an AR3a. Same basics will apply to your AR9 rebuild

AR3a X-Over Cap Question
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Old 15th January 2014, 07:03 PM   #5
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Location: Pretoria
Has anybody here tried their hand at building AR9 clones from scratch? With the drawings now in the public domain and all the drivers available, it seems doable. It won't be cheap or easy but the results should be worth it.
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Old 15th January 2014, 09:33 PM   #6
sreten is online now sreten  United Kingdom
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Location: Brighton UK
Hi,

Refoaming the original drivers is much better than replacing.
Recapping old electrolytics is a good idea. 4 bass units and
2 lower mids will need refoaming. Mid and treble should be OK.

rgds, sreten.
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