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About Carlspeak

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  • Birthday 08/08/1943

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  1. I sell a lot of premium linen grille cloth to vintage speaker owners. With it, I provide written instructions on how to install the cloth using a method I used on many cloth installs. Aileen tacky glue on all four sides, then fold the corners and staple only there. PM me and I'll be glad to email you those instructions.
  2. I sold a number of AR3/AR3a Super-mod kits some years back. The kit basically had new drivers to replace original dome tweeter and dome midrange. The kit's midrange driver was a Seas H1262. It was a perfect drop in fit and came with a pre-fab'd chamber that was installed on the backside of the baffle board because the Seas mid did not have a closed back. All of the kits had positive feedback. The owners were satisfied with the sound. I did some dedicated measurements comparing the original dome mid with the Seas Mid. along with the tweeter and woofer; each done separately. They can be found on pg. 6 of my Super-Mod development document. The midrange curves show the Seas driver with a flatter response thru its pass band than the original dome mid. That's one test of one vintage dome mid and doesn't indicate a trend. AR3a_Super_Mod_development.pdf
  3. Evidently, you must be a member to watch full videos. They are listed under AES Live: Legends. I found one from Ray dolby, Richard Small and Les Paul. There are many others.
  4. I am a member. They have a good number of videos, but I thought they were accessible to visitors. I'll take a look.
  5. I think that Vishay will work great. Suggest you get both 0.3 and 0.5 ohm values and try each. You are fine tuning here and I can't do it remotely. Theory is one thing, but your hearing is the final arbiter.
  6. I agree with Steve!
  7. Being described as an AR factory OEM, I believe SS acquired them from AB tech services when they went out of business. I'd be skeptical of that driver because ABT did not have a good record of getting drivers made in the far east to 'original factory specs'. ABT was initally a true source for AR factory parts and service when AR first closed up shop. However, over time, I suspect they sold off all of the true AR parts and resorted to sourcing replacement drivers from Asia. If you really need a new mid, RoyC may be able to help you with a true original that he has repaired.
  8. IIRC, Villchur's original acoustic suspension patent ( states the speaker should not be completely sealed air tight.
  9. Having low tolerance resistors in your XO's is just as important, if not more so, than having 'matched' caps. It's the main reason I opt for Mills 1% resistors when doing a XO resto or upgrade even if the original cement 5 or 10% resistors may still be fine.
  10. The big caps might be Sprague Compulytics. They will be appropriately labeled. If so, my testing has shown they drift very little from spec. after 30 years. I again refer you to the 'good,bad & ugly' thread where I discussed the Sprague caps in another post. You can save a lot of money if you retain the Sprague caps (if you indeed have those) and not let lytic-bias get the best of you. :-)
  11. I agree with using Solens in shunt circuits where large uF values are needed and film is a priority.
  12. For those contemplating their recap projects, I just want to say that there is no one correct combination of cap type that will please all listeners. We all hear differently and our listening environments are yet another HUGE variable. That is why AR included adjustments in the HP circuits. First, the Aetna-Polak rheostats and later, switches. The rheostats were ideal because they provided continuous adjustment, whereas the switches were limited to incremental adjustments. So, take your best guess on what to buy, do the recap and give the speakers some time for you to adjust to them because they will most surely sound different - hopefully better. Your listening taste will dictate what tweaks may be required to 'voice' them to suit your particular situation.
  13. Someone mentioned seeing some caps in British speakers with black bodies and red ends. I don't know if they are the same as what we've been discussing. I think it's just coincidence they look the same. I am quite sure though there was an era where a cap manufacturer made and private labeled caps for speaker manufacturers. They basically made the same cap with black body and red ends and printed whatever the customer wanted on the black. KLH was a big user of them, but there were many other speaker brands also.
  14. Been there done that some time ago. DavidR, click on the link below and read the whole post and the prior post that explains the test methodology.