Deang
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Posts posted by Deang
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The only in-network plot I have of the K-77-M with an AA is a Klipsch anechoic plot that I can't really post. Those peaks aren't there.
There are some out of network plots that are easy to find with google - Al did most of them. No peaks.
It's also odd that you would be "driven out of the room", and your initial impression that it "sounded terrible".
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Probably offensive to ask you this @mboxler, but I'm sure you remembered you have a split network and that your low pass elements are connected to the woofer.
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@John Warrenhas modeled that thing to death.
https://www.northreadingeng.com/Klipschorn_model/basshorn_model.htm
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It's written in invisible ink.
Nothing there friend.
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I couldn't find the document. However, I did find this in the timeline for the Klipschorn and La Scala.
Nov 20, 1987
The Aluminum K-400 horn was replaced with the K-401 structural foam horn resulting in slightly improved distortion figures. -
8 hours ago, geoff. said:
The AL-2 looks to be, for all intents and purposes, an AL-3 with the exception of depleting the stock of the formerly ubiquitous, but now out of favour, 2133s (2.5mH) coils by using them in series to form the 5mH squawker bandpass.
Yes.
Check out the AK vs. the AK-3
When I figured this one out I started pushing AK-2 users backwards instead of forwards. They only have to change two parts and never have to open the door to the woofer chamber. Those big film caps are fine, and you run into more trouble and hassle by breaking the airtight seal.
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People do change their mind about things, and I’m sure PK was no exception. There is no growth without adjusting your position as you are presented with new information.
I have a hardcopy around here somewhere from Klipsch Engineering on the K-401. If I can find it I will screenshot it.
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You’re not allowed to measure stuff anymore, lol.
I was talking to JEM the other day, who mentioned that the AA was designed to work with the Alnico K- 77, and doesn’t sound particularly good with the EV 77-M. It was an interesting discussion. With that said, I don’t think I have ever seen a plot like that before.
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If you are going to sell them, I would fire them up and listen to them. If they sound “okay”, just leave them alone. Most think those old cans are paper in oil (they’re not), and you might be better off selling them as they are. Updating them may actually hurt your resale value. Don’t ask, we know it doesn’t make sense.
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Hi @Ed WolinskiAre you keeping these or selling them?
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Yeah, replace them now and you don’t have to think about anymore. Henry is right, they are probably not “bad”, but they are certainly on their way out.
Jim did a nice a job on that page. We speak often and we are very much aligned.
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Eminence makes drivers for a lot of companies. Like I said, what it looks like has no bearing on compatibility with your cabinet.
BTW, RoHS is not a company, it’s a compliance standard.
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I’m guessing this was one of those deals where you jumped out of your skin and made a dive for the volume control? If so, you may have lost a woofer or two.
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They may not look the same, but what matters are the specifications (t/s parameters).
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If loosening and tightening the screws, which is really just done to ensure a good connection - didn’t bring the highs back - then you should probably just go ahead and replace the capacitors.
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I misread something earlier that just made me want to bow out. I thought he said he got a reading from his RF-7 high pass with the straps removed, which really confused me.
I don’t like internet troubleshooting, especially when there’s no problem!
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Great, another screw problem.
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What year?
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You can also get them at https://reconingspeakers.com/products-page/klipsch-k-33-e-woofer-121501/
As for the network, just think of it as preventive maintenance. Even if the capacitors are mostly okay, and many are - they are aging out. Best just to get it over with. This makes more sense then measuring every 40 year old capacitor and trying to decide if you should change it or not.
The upgrade path is to go to the AL-3, but since you are selling these ...
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Nice clean up.
I turned down being a moderator. I told Roy that after a week there would only be seven people left.
BTW, the Great Purge wasn’t about deleting content.
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I see an untapped market here. Modified coil via gold(en) ratio screw providing intermingled cross canceled eddy currents.
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Typical third party claims.
Don't worry everyone, I still remember when I used to make them. 🙂
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Mass roll off at 112Hz. Terrible.
Type AA plus K-55M/K-77M = Sibilance?
in Technical/Restorations
Posted
¯\_(ツ)_/¯