Giorgio AR

I clicked the link and saw who your uncle was and what he did ... he was a great man. Beautiful both for his function, but above all for the design that enhances even more the 'Audio Baton' Model B-9, a tube equalizer, marvel of the time!

Me too, Aadams, will you see that Dna will show us his AR58s /b? today lremoving the grille, so we will soon discover the mystery! Now, after a hearty breakfast, I have to go down to the cellar, find the crossover plate and find the AR58s one for the photo of the second resistor.

Hi Dna, local 1.08 AM, here is a photo of my AR58S crossover, of one resistor you see the value, the other one fails, a good view of capacitors and coils, now it's too late and tired to go down to the cellar ... I'll go there tomorrow morning, take out the crossover and photograph the second resistor for you!

I no longer remember how many Acoustic Research pairs I have come to own ... tomorrow I recount everything, but I certainly don't reach thirty pairs yet (not immediately, but I hope to be able to give myself a limit), it is not easy to sleep in the garden now it's too cold, maybe I could fix the caravan, much warmer and raised off the ground! This morning at 9.00 local time the frost melted with the sun.

Did the parrot outlive your uncle? If you've inherited that too, be careful, some parrots live nearly a century! Better invest a few dollars and build him a nice and spacious aviary with an old log inside to chew on!

Again ... I missed it and just bought this pair of AR2x. I couldn't resist, you all know, that I have: AR2, AR2a, AS-2a Heathkit, AR2ax as well as AR48s plus all the components except the AR48b cabinets, but a couple of AR2x until now I didn't even think about finding it and buy it, under my new purchase, a splendid pair of AR2x with the early woofer large frame and six hole, beautiful in my eyes: AR2x

They will also be mutilated or "tormented" cabinets, but they are between about 50 and more than 60 years old and deserve your care and a new life, you can already see an AR3a woofer and probably an AR5 that want to return to emit their sounds in the right "houses" built and restored for them!

I am looking for a 200005 tweeter, if possible the same in color and aesthetics as this one of mine in the photo with a dating close to and measured by the tester close to the one detected by me (not very reliable because there may be variations in the calibrations of the various testers). Please send me a message, thank you Giorgio.

Gorgeous item !! I want it ... after having seen the thread and reading the specifications of "The Electronic Subwoofer" I am convinced of the advantage and help of this beautiful project of Roy Allison. Sam let us know how much difference you will find in the low range of your AR3a after testing it together with the splendid Mc2300, returned to your home in great shape!

Great scheme to help us Acoustic Research enthusiasts, downloaded, printed and stored in my documentation, thanks fedeleluigi.

Another pair of woofers that are fine and these are "matched", you can get them and sell the ones you own to make up for the expenses A couple from the same origin is the best for aesthetics and functionality! https://www.ebay.it/itm/304264617302?hash=item46d7959d56:g:qmkAAOSwMKVhuIEU

Still a little advice on the AR2 / AR2a mid cones, the paper of the cone is very thin and fragile, furthermore pushed outwards by the fiberglass triangles present at the rear between the cone and the frame, and sometimes has more cuts on the cone extended or not! It also happened on the cones of my AR2a, under the well executed photo and circled some of the cuts detected at the time (the other cuts can be identified well ...), repaired as follows: Removed the speakers, carefully removed the four fiberglass wedges, approached to match the edges of the cone paper, cut small pieces of thin tobacco paper and glued on the fracture line behind the cone, at the front, with a toothpick passed a small glue lip on the same fracture lines. Reassembled after drying, the mids have been playing perfectly for years.

Ouch, how much harm it does to me ... unfortunately from Italy it is more difficult to find spare and exact parts for old "objects" ... It was better not to see. I am attaching a thread, published some time ago on the disassembly (I would have hoped to find some easy problem, but look at the burns of the coil support) of one of the two non-working "brown paper" dual mid cones and still preserved !! Another small clarification on these particular mids, the couple photographed of me that you see in the posts above arrived intact, but if I'm not mistaken on CSP, years ago there was a topic about a dual mid that had arrived after shipping packed and wrapped. in nylon and this had stuck tenaciously to the sticky substance on suspension unfortunately tearing the paper itself of the cones !! For those who buy a pair of mids in its plastic container (they appear together every now and then on E..y), the best method of protection is illustrated below, minimum fatigue, maximum protection: double-wave cardboard (better two), paper tape and then any packaging can be done: the objects will arrive perfect, even in Australia!

I am a passionate and collector of Acoustic Research, but from a technical point of view I have no capacity to give you an answer. But some advice on the later mids, those used on AR2ax, I feel like giving it to you and it will help other more capable forumers to give you some help on the mid and high problem (if the L-pads have both been changed): first disassemble and desolder your mids and measure them with an ohm meter - there are various versions of these averages with coils and very different values of their resistance, however it is important that the measurement both have different values of a few decimals of ohms, thanks to these measures the aids will be more correct to allow you to make your pair of AR2a upgraded to AR2ax sound beautiful

One original AR5 midrange https://www.ebay.it/itm/275054183702?mkevt=1&mkcid=1&mkrid=724-53478-19255-0&campid=5338381872&toolid=10001&customid=de68aedc-5bfc-11ec-bd89-303932383332 All AR5's spares!!! https://www.ebay.it/sch/m.html?toolid=10001&item=275054183702&mkcid=1&_ssn=bonventdautan&_osacat=0&campid=5338381872&mkrid=724-53478-19255-0&customid=de68aedc-5bfc-11ec-bd89-303932383332&_odkw=&_from=R40&_trksid=p2046732.m570.l1313&_nkw=ar&_sacat=0 Giorgio

When I bought the AR2a, a dual mids section had the coils of both speakers burned out, I had considered replacing the dual mids years ago before knowing this Site and I had built a flange at the time to insert a Heco mid ... it was not the same thing. Then I found a spare and as you can see in the photos of the AR2a, now they have in every dual mids basket a speaker with a brown and a gray cone (the gray ones are the most common, it seems that the brown paper was produced for a short period. only 1963, year of my speakers), never found spare parts with brown paper, too rare ... so I leave my AR2a, even if later I bought another dual mid as a spare, always with gray paper, it may be that I can to serve! I also own AR2ax and 2 pairs of spare mids, but now I don't want to use them with older sisters, I like them that way, but I always hope to find a dual dome with brown cones !! Help me ... Here is the photo documentation below Only flash and immediate attenuation of the left channel, the amp turned off and placed on the shelf. I'll send you a PM!

True, the charm of the naked McIntosh is unmatched, even the four "feet" that hold them slightly off the ground have their charm, like a beautiful and elegant woman with little clothes and high heels

It's true Genek I miss enjoying the horizontal positioning for which these speakers were designed, but this position, as seen in the photos, is forced by the size of the wall and the 4-door sideboard in the middle of the speakers. Less horizontal dispersion partly mitigated by the not too great distance between the speakers ... unfortunately you can't have everything. I had been able to listen to a pair of AR3a horizontally positioned for some time, but in this case the different positions have little change on the mid-high range dispersion. However, now I enjoy the double pair like this and I thank mom AR for "cheap" instruments of about 60 and more years that today, 2021 cheer me up with pleasant sounds and it is an extraordinary thing, nothing to do with the strange and expensive speakers produced today and designed not to reproduce sounds, but to adapt to market demand: they are fine today, tomorrow I have to change them to adapt to the new way of listening! Maybe it won't be tomorrow or next year, but the AR2a, due to the help of the supertweeter and don't forget that I also own an additional pair of Heathkit AS-2a, so I can double the AR2s too eh, eh ... they will have to be placed in the other room where they can play as they were designed, horizontally; this is not a dream but a project that I will realize. The only lack, impossible (never say never) to be able to insert them horizontally in the library and surrounded by books! Before publishing the answer, I search the archive for a photo of one of the two AR2a with the original canvas (there are all four AR2a and AR2 canvases plus an AR2a spare part that will serve as a donor to make the AR2-ST canvas), made years ago , before restoring the couple and then placed between two boxes in the closet. In this speaker the pin "a" is missing, then purchased in the USA! Giorgio

For the room where they are inserted, listening with the Mc2105 vu-meter indices at a peak of + three on the scale, therefore theoretically 100w. x 2 effective, everything is perfect, including the "magic" of being able to have a conversation between two people without shouting and hearing what the other person says! This happens with the combination in question and is hardly found with speakers of other brands ... but I notice that as soon as the AR10TTs wake up, with the Adcom (without the vu-meters), the sound pressure emitted by the speakers was certainly greater. , but always not annoying and the higher power easily tolerated without distortions or problems on the part of the AR10. On the other hand, I don't always listen at high volumes, the magic with ARs is also equal to tenths of a watt, everything still arrives perfect to the ear, much better than any headphones.

Sam, I had an elderly technician, retired for years and very capable in repairing "ancient" equipment including those with tubes as well as old televisions, I lost the telephone contact I had, but I do not despair through common acquaintances to be able to contact him, he works well, I do not it is quick in the time it holds the item to be repaired, but it doesn't ask for a lot of money! Regarding McIntosh, I own (in addition to three Receiver Macs) the classic triptych C28, Mr77 and Mc2105, excellent, but the power amp now connected to AR10TT MK2 is too "small", I am attaching a photo taken a moment ago in which you see the amp and the tuner, above this, provisional the pre Monrio Primus instead of the C28 and, in the cabinet, in the right compartment the final Monrio Cento (in English Hundred) ...

Sam also in my case I have a lot of old electronics to be repaired or fine-tuned, apart from the Adcom I have an Italian power amp, the Monrio Cento* (this will be repaired, however, by the manufacturer factory with which I have already made arrangements) with mosfet transistors that will be dedicated with its pre to a pair of AR with 12" (circa woofers and unfortunately other electronics are waiting on the shelves to go back to "work" ... However your Mc2300 is the top for me and will always remain an unfinished dream, *I am attaching a link in which you see the test carried out in 1993 of this "dual mono" amplifier declared with 135w x 2 and with measured measurement of more than 280w / channel on 2 0hm! https://www.facebook.com/Monrio-795249060559803/photos/prova-monrio-cento-audioreview-maggio-1993/953843704700337 The text is in Italian, but in paragraph 1 you read the values measured at 8/4/2 ohm! good listening

Sam, you are right, I recognize myself in your statement as an "archivist" towards me, among other things with the addition of the AR17s I add a different volume in the cabinet of my speakers with 8" woofers, larger than the AR7 and AR18 and the various AR4 models I have. I think the real comparison with other AR speakers can be with the AR6s that give a close low output to the sisters with the 10" woofer, probably the volumes of the cabinets are very close, but the woofers and tw's of the AR17 are from a future generation. You are also right about the fact that by acquiring the AR17s, certainly the restoration will be as close as possible to the original Acoustic Research specifications ... I had been hoping for a long time to find a pair of AR17s, the opportunity arose, immediately grasped.

Here is Nicolai the cork discs with exact measures of diameter and thickness: personally I put one among stacked speakers (among other things it allows the rotation of the cabinets in a safe and atraumatic way for the veneer), I put two if the cabinets are positioned horizontally, such as under my AR LST stacked on top of the AR3a and AR10TT! Perfect as well as allowing air circulation between the cabinet bases!

Very beautiful, beautiful cabinets and easy restoration, correct the work undertaken to bring them back to perfect functioning, last but not least a good "refresh" to the already excellent cabinets with correct final oiling and you will get a splendid pair of AR6s. I enclose photo of my pair of AR6, slightly older than yours, they have identical woofers, yet to be finished, but the cabinets are not as good as yours ... you can already understand from the photo on the back. The woofers, the right still awaits the new foam.

Translation: Thanks to you, Giorgio, I really appreciate your restorations and your expertise, in my opinion they are really excellent works that express your passion for the Ar brand. Good night!! Giovanni, I am a passionate self-taught collector and I like to restore the "good things" of yesteryear to their original splendor and functionality or as close as possible! I do not have your technical skills, nor knowledge of electronics, too old to learn and without a good teacher it is even more difficult ...