[How would you achieve that AR sound modern components?]

4 minutes ago, Glitch said:

Could one use a MiniDSP programmed to match the frequency curve of the AR speaker?  It seems the dynamic response would be different (i.e. impossible to match), but the general voicing character might be close enough to be believable.

Yes; a person with the skills would find it relatively easy.

[How would you achieve that AR sound modern components?]

Something like this is the least expensive way to go between the woofers and the satellites:

https://www.parts-express.com/subwoofer-crossover-8-ohm-150-hz-200w--260-220

some of the component values may need adjusting for your specific drivers, and you may need an L pad on the woofer or satellite side.  Note that it can be split in two.

 

EDIT (add): to calculate crossover values see: https://www.diyaudioandvideo.com/Calculator/SpeakerCrossover/ 

and another: http://www.apicsllc.com/apics/Misc/filter2.html

[How would you achieve that AR sound modern components?]

Hi Jerry;

I have a couple of NHT Super Zero 2.1 speakers - they are great little speakers.  I originally purchased them with the intent to do something like you described, using AR91 speakers for the bottom end with an external Parts Express 2 way passive crossover.  One of my 91s was in need of a midrange driver; which I was able to pickup and install before the project got going.

Simply Speakers has replacement AR 12" drivers (and dome mids and dome tweeters); AR 9, 90, 91/92(AR58S?) crossover drawings are on this site - just have build them.

For less than $1500- in materials, with some wood working and soldering skills, it is possible to build brand new replicas of a pair of AR91 or AR58S speakers; a pair of AR9 speakers for less than $1000- additional in materials.  Labor in the USA (if you paid someone to do the work); would be much more than the materials.

[A center channel project...?]

I am planning a similar unit, using an 91/92 crossover, which I have.  I also have the UMR and a couple of 8" AR woofers.  I am debating about the tweeter.   These are the three I am thinking about:

https://www.parts-express.com/hivi-q1r-1-1-8-textile-dome-tweeter--297-417?utm_source=google&utm_medium=cpc&utm_campaign=pla#lblReviews

https://www.ebay.com/itm/AR-Acoustic-Research-Replacement-Tweeter-for-AR9-AR11-AR58s-Speaker-MT-4121-4/152720220413?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20131017132637%26meid%3D93a23f89998f4c9bb085e0174b82c2b4%26pid%3D100033%26rk%3D1%26rkt%3D7%26sd%3D152720220413%26itm%3D152720220413&_trksid=p2045573.c100033.m2042

https://www.simplyspeakers.com/acoustic-research-replacement-tweeter-12000840.html?gclid=CjwKCAjwnLjVBRAdEiwAKSGPI6HjJT-EQcJOj4-pWsN04I3yoL6HQz9UJFub8xKq8ZbZrRfE1_kLRhoCcqsQAvD_BwE

and of coarse I am keeping watch for a good deal on 91, 91.5, 92 and 58S speakers.

 

[Bi Amping the AR9 - How do you do it?]

When I had AR9 speakers set up a decade or so ago, I used the amplifier sections of two Onkyo TX8500 recievers (dual independent power supplies) in vertical bi-amp mode.  They worked great.  Unfortunately, I had to sell that pair of speakers.  I am finally getting around to rebuilding my 2nd set of AR9s; the upper section is ready, a professionally is refoaming the woofers, hopefully I'll get them back on Saturday.  

I am concerned that the TX8500's may need some refurbishing, I got estimates in the $500-$600 each range from a couple of places here in the Bay Area.  I am not ready to pull the trigger on that, and am considering purchasing a digital oscilloscope instead, and doing it myself.  Of course, I don't have the time.....  So I purchase a Crown XLS1502 amp for now.  

 

[T930 Series II]

Hi;

I am looking for information the Boston Acoustics T930 Series II speakers, any suggestion on sources?

We picked up a pair this afternoon.

Thank you

Nigel