harry398 Posted July 21, 2018 Report Share Posted July 21, 2018 Snatch. Been wanting a set. Quote Link to comment Share on other sites More sharing options...
harry398 Posted July 21, 2018 Author Report Share Posted July 21, 2018 Owner lost 1 woofer.lol. no badges. Today i pulled the stock crossovers out. Recapped a AR91 crossover, all dayton npe caps. Glued in. Pulled totally smooshed midrange out with industrial carton tape. Notice wood grill,not plastic. 2 coats of watco oil. Simple speaker. Slapped in ar9 woofers. Going for a test ride in 8 hours after glue dries. Quote Link to comment Share on other sites More sharing options...
harry398 Posted July 21, 2018 Author Report Share Posted July 21, 2018 nice music to test smoothness and how guitar sounds. bass checks too. https://www.youtube.com/watch?v=ye-FvKCZp3s&index=3&list=FLev5yfmM6FuFRyI7IcuA02w&t=0s Quote Link to comment Share on other sites More sharing options...
Pete B Posted July 22, 2018 Report Share Posted July 22, 2018 Is there a crossover schematic somewhere, I couldn't find it? Quote Link to comment Share on other sites More sharing options...
DavidR Posted July 22, 2018 Report Share Posted July 22, 2018 Quote Link to comment Share on other sites More sharing options...
DavidR Posted July 22, 2018 Report Share Posted July 22, 2018 Nice work Harry How does one lose a woofer? Do you test the dayton caps ? I bought some small ones and had varying results. The 2.7uF were spot on, the 3.3 were like all 5% high, the 8uf were just a bit on the low side but acceptable. Where do you get your Watco oil? Quote Link to comment Share on other sites More sharing options...
JKent Posted July 22, 2018 Report Share Posted July 22, 2018 Looks good. Why the 91 xo? Quote Link to comment Share on other sites More sharing options...
Stimpy Posted July 22, 2018 Report Share Posted July 22, 2018 24 minutes ago, JKent said: Looks good. Why the 91 xo? The AR58S crossovers are identical to the 91s, minus the level switches. Quote Link to comment Share on other sites More sharing options...
JKent Posted July 22, 2018 Report Share Posted July 22, 2018 6 minutes ago, Stimpy said: The AR58S crossovers are identical to the 91s, minus the level switches. Good to know. Thanks. Quote Link to comment Share on other sites More sharing options...
harry398 Posted July 23, 2018 Author Report Share Posted July 23, 2018 Ahhhh.....yes... 58 is a excellent speaker. Deep lows, good bass output, clear mids(a touch strong at times), and a crazy great tweeter. Simple crossover that does it all well fir a 3 way. Why didnt they produce more? Its not as smooth as the ar9, nor as detailed, but it approaches ar3a levels in greatness. It doesnt have the smoothness of a 3a(mine at least), however the lows are almost the same with possibly more bass output. The tweeter Blows away the 3a even with a hivi. No comparison. While analizing this speaker, i pulled over the ar78ls. Smoother on mids, almost as low, less tweeter output and highness(crispness and high freq). 78 is super smooth and mellow. Outdtanding specimen of a 12 inch AR. Also great! Room placement is key for me. I found these sounded best on floor in corner. All dayton NPE on 91 board, since it gives me switches. Thanks to my brother for that! I LIKE THE 91! The question is ....why did AR use that fiberglass ring in front of the mids back in the 60S and 70s? Calm the mid?? The ar9 is far smoother, but thats a diff animal. Enjoy...i worked hard on these, and they are great. Quote Link to comment Share on other sites More sharing options...
harry398 Posted July 23, 2018 Author Report Share Posted July 23, 2018 8 hours ago, DavidR said: Nice work Harry How does one lose a woofer? Do you test the dayton caps ? I bought some small ones and had varying results. The 2.7uF were spot on, the 3.3 were like all 5% high, the 8uf were just a bit on the low side but acceptable. Where do you get your Watco oil? Nope, didnt test caps. Every time i use those dayton npe......great results. I cant say yhat for others, and mh worst experience was ERSE yellow turds. Scratch my ear drum! Watco, home depot. David, your going to love those ar9s. Quote Link to comment Share on other sites More sharing options...
harry398 Posted July 23, 2018 Author Report Share Posted July 23, 2018 6 hours ago, Stimpy said: The AR58S crossovers are identical to the 91s, minus the level switches. Hi Stimpy. You got a winner in the 58s. Hope you enjoy them! Yea, i had a broken terminal on one cab, so i capped the 91 boards..........better connectors. Nothing wrong with 58 board, just easier for me Quote Link to comment Share on other sites More sharing options...
DavidR Posted July 23, 2018 Report Share Posted July 23, 2018 Thanks for the info. Home Depot works for me. Are those your empty 90's on eBay? Quote Link to comment Share on other sites More sharing options...
Stimpy Posted July 23, 2018 Report Share Posted July 23, 2018 1 hour ago, harry398 said: Hi Stimpy. You got a winner in the 58s. Hope you enjoy them! Yea, i had a broken terminal on one cab, so i capped the 91 boards..........better connectors. Nothing wrong with 58 board, just easier for me Thanks! I'm definitely enjoying my 58S speakers. Much more than I anticipated. So much so, that I bought a set of AR91 crossover boards too, as a mod. Just putting together another cap order for those. Quote Link to comment Share on other sites More sharing options...
briodo Posted July 23, 2018 Report Share Posted July 23, 2018 Nice job pulling the mid dome out. Those have always been a challenge for me, due to family genetics with small fingers trying to "pop the bubble". My family is the reason why Dynaco had metal screens over their domes... Quote Link to comment Share on other sites More sharing options...
harry398 Posted July 23, 2018 Author Report Share Posted July 23, 2018 6 hours ago, DavidR said: Thanks for the info. Home Depot works for me. Are those your empty 90's on eBay? Yes. Quote Link to comment Share on other sites More sharing options...
lARrybody Posted July 23, 2018 Report Share Posted July 23, 2018 If you are looking for AR 91 crossovers for your 58S's check that they are actually 91 boards. AR used the same Masonite boards for the AR 91 and AR92, although the components are different. Some online sellers don't realize this and advertise them incorrectly. I did not realize this till Stimpy (I think) set me straight. I was lucky and got the correct 91 boards. Quote Link to comment Share on other sites More sharing options...
ar_pro Posted July 23, 2018 Report Share Posted July 23, 2018 You've accomplished a lot in short order - nice job, Harry! Clever use of the AR-91 switched crossover, too; those might be the most reliable level controls that AR ever employed. And thanks for the photos of your AR collection & listening room, as well as your work space - extremely impressive! Quote Link to comment Share on other sites More sharing options...
harry398 Posted July 23, 2018 Author Report Share Posted July 23, 2018 Thank you mr AR PRO. I am getting good at this. I enjoy the results, and some of them i sell off since i now have 15 pair. LOL. Cant keep em all. I Also like sharing my results and opinions on sound quality. You also have done tremendous work on ar speakers. Thanks again. Quote Link to comment Share on other sites More sharing options...
owlsplace Posted July 24, 2018 Report Share Posted July 24, 2018 20 hours ago, larrybody said: If you are looking for AR 91 crossovers for your 58S's check that they are actually 91 boards. AR used the same Masonite boards for the AR 91 and AR92, although the components are different. Some online sellers don't realize this and advertise them incorrectly. I did not realize this till Stimpy (I think) set me straight. I was lucky and got the correct 91 boards. What differences should I be looking for here as mine are currently in progress? Roger Quote Link to comment Share on other sites More sharing options...
harry398 Posted July 24, 2018 Author Report Share Posted July 24, 2018 You want the 100 mf woofer cap. Make sure rest of caps are the same Quote Link to comment Share on other sites More sharing options...
Stimpy Posted July 24, 2018 Report Share Posted July 24, 2018 1 hour ago, owlsplace said: What differences should I be looking for here as mine are currently in progress? Roger The 91 has 5 caps. Four, 8, 24, 40, and 100uf in value. The 92 only has four capacitors; 4, 8, 24, and 80uf. One coil difference in value too, but that's not so obvious. Quote Link to comment Share on other sites More sharing options...
scottie munoz Posted August 23, 2021 Report Share Posted August 23, 2021 On multiple occasions here I have read the 58s crossover referred to as "simple". Like the 3a. I have 91 xo's ready to go into the set of 58s that just 5 mins ago showed up at my drive way!!! ( first at 12"!))) If the xo on 58s is 3a simple vs 91 complex and beautiful, I'll have been misled and bummed. Like jbl centuries...the top two most popular vintage speakers had essentially 2 caps and a attenuation on mids and highs. The at at least had a inductor on woofer. I love the beauty of the guenious behind a complex xo. Though simple 1st order can also mean better in some ( many cases) cases. Quote Link to comment Share on other sites More sharing options...
Stimpy Posted August 23, 2021 Report Share Posted August 23, 2021 The AR58S crossover was simplified, compared to the 91, with the elimination of the level switches. Otherwise, it's not a simple 6dB first order crossover. Both can sound great, if correctly designed. Regardless, good luck with the 58S speakers, and the crossover swap. That should be fun. 😃 Quote Link to comment Share on other sites More sharing options...
scottie munoz Posted January 19, 2022 Report Share Posted January 19, 2022 On 8/23/2021 at 12:49 PM, scottie munoz said: On multiple occasions here I have read the 58s crossover referred to as "simple". Like the 3a. I have 91 xo's ready to go into the set of 58s that just 5 mins ago showed up at my drive way!!! ( first at 12"!))) If the xo on 58s is 3a simple vs 91 complex and beautiful, I'll have been misled and bummed. Like jbl centuries...the top two most popular vintage speakers had essentially 2 caps and a attenuation on mids and highs. The at at least had a inductor on woofer. I love the beauty of the guenious behind a complex xo. Though simple 1st order can also mean better in some ( many cases) cases. Quote Link to comment Share on other sites More sharing options...
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