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newandold

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Everything posted by newandold

  1. Here’s a bit of “remember when” regarding that tweeter. When it first appeared from Allison Acoustics back in the 1970’s, a brand new factory replacement could be ordered and shipped to you from the Natick Mass. factory (along with near bulletproof packaging) for the same price (around 35 bucks)! No metal screens though....they had not come up with those yet! Bill
  2. Yes I have seen many posts about this corrosion problem during the last 24 years or so, that I’ve followed Allison on the web. I believe there is no one single factor that makes it happen with SOME of these tweeters that have the metal screens. (I started out in 1977 with no screens). The screens were the “improved” protection that came roughly 10 years after the introduction of the original lineup. High humidity where the speakers are used is the catalyst IMHO. Perhaps that compound like you said, or a touch of rusty corrosion between that screen and the wire, but no one knows for sure. Rust on the screw heads is an indicator of where they’ve been. Bill
  3. https://www.simplyspeakers.com/acoustic-research-replacement-woofer-12100032.html Based on reviews only, it was hard to find anyone displeased with this alternative if needed.
  4. Roy was such a good guy and is sorely missed. Very nice story and typical of the way things were done when things were going well in Natick.
  5. The website looks great....looks like you’ve got your place....From the posts on this I’ve read to date, it appears you’re going to need them. Bill
  6. I’ve been collecting original spares on EBay for years....but you have to be very careful with whom you’re dealing. That being said, and especially that it’s a 3A, it would be best to have that original rebuilt. I have used Bill Legall’s Millersound in Landsdale PA and also Simply Speakers in FL. Surely there are a few guys here with some suggestions of their own Bill
  7. Yes swapping the woofer is one of the best ways to be sure. The woofer is very old and the trip may have been just enough to shake up a voice coil that was already on the way out. Fortunately if that’s the case a woofer for that system can still be had. The seller may also work with you to some extent on some credit. I was once faced with a situation like that and the seller gave me some credit towards the repair. Bill
  8. The terminal end is most common. but for sure follow the lead continuity to the coil.
  9. Could be a bad solder from the voice coil to the cone. I wasn’t able to open the video unfortunately.
  10. The A1’s appear to be in outstanding condition! Most of the Allisons that come up for sale these days are sad to look at....beat up and such.
  11. This is interesting! My first time hearing of “Holographic” in a loudspeaker rather than “sonic holography” built into preamps from Bob Carver, intended to expand the soundstage of any loudspeaker. Those A1’s are fantastic! They were the focal point of my own system for 35 years. Bill
  12. They are very old, so it should not be surprising to find more than one driver failing. The least invasive way to figure it out is to remove the grilles and allow music material to play softly enough to get your ear close to each driver, to figure out which ones are low, distorting or dead. For my part, I would want to pull the drivers and check every internal connection. Bill
  13. I would also try the fuse swap as suggested by the previous poster and also run the spectral balance control all the way in both directions and listen for a smooth transition. However beyond that, you (or someone familiar with the LST,) will need to evaluate each driver and array to determine where the drop in output is coming from. Not as complicated as it is methodical with all those drivers. The sound you describe from the midrange is indicative of a driver failing (or possibly the fuse). Bill
  14. Hi Chris, You’re right! I had the older, original lineup of Allisons in mind. (None of the cones from my A1’s (1977) were coated. All of the smaller woofers I’ve seen and Owned from the eighties and nineties were coated. I have the AL 115s, close in age to your LCs and the newer NL1440. That being said, it’s always the surrounds that go. Spiders get weak and loose compliance also. I have had both spiders and surrounds replaced in all my systems between 2012 and 2016. The quest to stay “new” continues.,...
  15. Really, I never saw the Allison woofer cones coated until I bought a replacement woofer for an Allison One around 1994. Big changes by then within the company and that woofer (though it sounded perfectly fine) had the entire surface surround and all shiny coated. It looked different from the originals but not nearly as far of a departure as what happened later in 2000 when David Faulkner bought the company and tried to jump start it. From what I’ve seen over the years, any coating applied to the surrounds has done nothing to add to the longevity, only wishful thinking. Just a gooey mess with the surrounds rotting and the coating separating from the foam. Right now, I’m a “ crash test dummy” for all new surrounds on my current Allison’s with no coating on any of the woofer surrounds. They range between 2012 and 2016. We’ll see.... Can’t speak to the tweeters. If you’re happy with the sound then that’s all that matters. For what it’s worth, the foam surrounds of today chemically are supposed to hold up better than the foam of the 70’s and 80’s.... If true that would be the REAL ticket! Bill
  16. The A1 woofer is 4ohm and the 9 is either 8 or 6 (pretty sure) I would send it in...I have sent work to them. They are honest and very reasonable. This way for sure you know what you’ve got!
  17. Let’s hope the simplest answer (dirty contacts) is the correct one. your midrange uses ferrofluid but the tweeter is cooled with silicone grease. It is true that crackling sounds can be indicative of a driver failure, but see how the cleaning goes before sweating it. If it’s cooling material dried up causing the problem, I’m toast too! Not including the subwoofer I’m running 28 Allison drivers in my system.....so far so good. Bill
  18. NOS= “NEW” old stock! (30 plus in your case. The only professional guy I knew Who attempted tweeter repair with no warranty is Long out of it. Some enthusiasts on the forums have done SOME repairs with limited success depending on the issue. Even Allison Acoustics, in their heyday, did not repair tweeters Or midrange drivers for end users. Replacement only.
  19. I recall on the Yahoo forum some guys went for the Madisound tweeter as an alternative. I personally wouldn’t go there....the Original Allison tweeter and midrange define the “Allison” sound. Without that, it’s no longer an Allison Loudspeaker. The seller should make good to you. Putting aside the “autosound” debate, those labels show the point of origin as the Framingham Ma. Location and nothing Allison has come out of there in over 30 years, so you’ve got some seriously NOS on your hands. Is there any evidence of corrosion around the protective screen? Yours may have deteriorated simply by being in a box for decades. There are many Used versions Of the Allison two way tweeter (some without the screens) that are interchangeable with the 110. They’ve been listed many times before, but I’d be happy to list them again if the seller fails you. Bill
  20. Chris, Have you contacted your Ebay seller to explain to him what’s going on with that tweeter and the system you’re using it in? Bill
  21. Doesn’t sound like a capacitor problem. Are these CD 8’s or the original Allison Eight? Any restoration done on the drivers? Before trying anything with caps., the slope switches should be cleaned first. The symptoms you describe are indicative of poor contact within those switches. You’ll need some Deoxit and Dust Off or equivalent. The Original Eight has a slider switch that is virtually self clearing by sliding back and forth many, many times. If you do this with soft music playing, you will hear the sound “recover” to normal. The CD8 has toggle switches that could be tricky to clean, but the same kind of operation applies. You can also pull a driver to get to the backside of the switches.
  22. Hi Brian, That Ebay seller has been out there for a number of years with his NOS inventory of Allison midrange and tweeter drivers with that infamous “automotive” designation. There was never an Allison full range automotive loudspeaker, or loudspeaker system (example, like a Bose branded system) that ever got off the ground. Bill
  23. Allison Acoustics was never involved with anything thing “automotive”. That being said, when the company went out of business MAYBE someone outside of the company decided those tweeters fit another spec. close enough and bought them up for resale (pure speculation). You probably just got a lemon....try swapping it out with the tweet in the other cabinet and you should have your answer. Bear in mind those NOS tweeters have been sitting around for 20 years at least and could very well be older than that. Look for signs of corrosion/rust where the screen attaches....some tweeters fell victim to that. Bill
  24. I was 63 when I saw an ENT specialist and had my hearing checked by the audiologist. I have a hearing loss in my right ear...not terrible, mostly less sensitivity in that ear, but what you describe is what I hear and It doesn’t matter which speaker I listen to. The result of an inner ear infection, it did improve but not quite what it was. Bill
  25. Even more interesting to me would be how many IC 10’s we’re actually built back in the day. The cabinets were outsourced just as the 20’s were, and the 20’s were 100 cabinets in total. The IC 10 probably wins the prize for the most unknown and least produced loudspeaker ever to come out of the company. As seen here in the thread, there was a printed spec. sheet on the loudspeaker, available from the factory, but never the typical sales brochure that could be had of any other model. Bill
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