Dave A
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Posts posted by Dave A
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Just now, Marvel said:
Just over 18k deaths for the H1N1...
About 6500 so far with Covid-19.
I neither watch network news and what short clips I see online do not influence me except to skepticism. When you can go to the CDC site and read this and then see the frenzied TV types freaking out at the stores I just sit there in a state of semi dis-belief over how easily people are manipulated and how if it is on the tube it is accepted with no critical verification. I see videos from China and Italy and read of bodies piling up but these same news mongers lie so much and all the time in areas I can check on that why would I believe them now? WHERE was the freakout over all these CDC recorded deaths? Reminds me of when the network news during Vietnam where they stirred the pot with a death toll each day on the 6:00 news and caused campus riots because they wanted an agenda accomplished and agit-prop became the news instead of real balanced reporting.
https://www.cdc.gov/flu/about/burden/index.html
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3 minutes ago, risingjay said:
Dave what year were your 904's made?
I am guessing 1999. Some of the speakers out of the pile had dates marked on horns and they were all bought and installed in one place at the same time. There are serial numbers but I have not tried to find out when they were used.
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1 hour ago, NADman said:
My Mom raised 7 children before disposable diapers were invented. Sh*ty diapers were just a normal part of life.
We all have modern laundry machines. Oh, lets not forget snotty Hankies. All comes out in the wash.
First comment out of my mouth reading about all this utter stupidity was "Are they all crazy? Never heard of washrags and soap?" All my friends do not watch TV and clearly TV is bad for your mental health and self reliance. We all got tired of the lies and blatant manipulation just like is being done today and somewhere along the line we all stepped off. I watch those who rely on TV to run their lives and make their choices for them with more than a little disgust.
This whole episode just reinforces and affirms the wisdom of my choice to move away from the city in 1987 and never look back. We don't think or act like city people and that is a real blessing.
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That is different than the ones I have. On the polyswitch I would not worry about what to use other than use the same thing Klipsch did. Some guys advocate for changing them out when you are in there and they are certainly cheap enough to do so. Like much of Klipsch and in particular the pro gear documentation on why things were done is poor.
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1 hour ago, mustang_flht said:
no i don't know, thanks for the link i will watch.
You have a famous brand that pays homage to a Frenchman who founded the automobile city of Detroit: the brand is Cadillac, the gentleman is Antoine de Lamothe-Cadillac.
Here Cadillac is a small town with us in Gascogne, South West of France...
😀
That would be Henry Ford that put Detroit on the map. GM was not there for that.
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4 hours ago, DrumNBassNThePlace said:
I HATE Baltic birch. MDF is the ONLY way to go. I don't even understand why this thread is here
Because I like speakers made for train stations and stadiums.
On a serious note (yes I know you are not being serious) I had forum member Kirby over for a visit and with all the projects around, building things of course came up. Remembering the famous MDF is best thread I laughed and told him I had something to show him. The rest is history. Called my BB supplier this morning and they are now stocking 4' x 8' sheets also up to 25mm. With all this virus stupidity I think I might just build some things.
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I have no idea and the only time I use them is to duplicate a crossover from Klipsch or rebuild one from Klipsch.
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22 hours ago, Chris A said:
The other 18" ZXPC horn that has been used by others here turns out to have slightly better polars than the K-510 with mumps, but then of course that other ZXPC horn has an additional 3" of mouth width, and is similarly taller and deeper, too. It has a truncated tractrix mouth rollout instead of full 90 degree tangent tractrix mouth.
Horizontal polars with K-69-A 2" compression driver:
Vertical polars with K-69-A 2" compression driver:
I'll be getting a pair of these new ZXPC horns (the K-510 knockoffs) next week, and intend to measure their polar performance. Then there is a lot less guessing.
Chris
Using a pair of these with B&C DE-1085's and they sound good. Those 1085's overwhelm a two woofer bass bin though and I am going to try these with the 415 bass bins I cant get 402's for. Great drivers for a two way system.
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13 hours ago, Greg_M said:
Molon Labe?
I still have a roll of #44 toilet paper. It sits on a shelf next to my Draft Evader doll from #42.
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The Tennessean is a great newspaper still published and admirably suited for use as toilet paper if you don't mind red ink smears on your hinny.
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I had some Chinese birch plywood from a yard close by once. The ply appearance from the side was one of uniform ply thicknesses but after that were voids and poor patches where knot holes were filled and it also weighed a lot less. You could pick up a piece of the Chinese junk and tap it with your knuckle and it sounded entirely different than the BB doing the same thing. Your material is regular plywood with Birch outer layers as far as I can tell.
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Here is a picture of real BB. All the plys are the same thickness. If the lumber yard told you they were selling you BB they misrepresented their product.
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9 minutes ago, garyeanderson said:
Well, no one has mentioned voids. I had not seen them before in Baltic birch plywood until January when I was making a cover for the Bogen DB20 and there it was. This is the only void in the sheet that I saw, but I guess stuff happens
Gary
There is a difference between birch plywood and Baltic Birch plywood. You were not using BB as is evident by looking at the edge of your pieces. There is also a big difference between Chinese birch and Baltic birch and of course the Chinese stuff is really bad.
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I have a large research group in Nashville. Sales reps for the two big Baltic outlets tell me MDF goes to boom boxes on wheels and BB goes to people building serious commercial cabinets for the music industry. Clearly cost is a consideration and the durability and I expect great sound also (since good sound is what the pros need + durability) make BB the economical choice. If it lasts longer and sounds great doing so it is cheaper. These guys look at all aspects of cost which is after all cost to buy AND cost of ownership. Sure the upfront purchase price of MDF is better but long term cost and over all savings over MDF is the domain of BB. I am amused by those who can't see past the purchase price of a piece of wood to total cost over the life expectancy.
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9 hours ago, twistedcrankcammer said:
Hey Dave,
Do you have a pair of KP-450s or a pair of KP-600s??
Rog
I am setting up a three way, left right and center that is, this week. Two of the horn cabinets are bad and I may rebuild them but the 904 bass bins are nice. Third horn cabinet is in superb shape but no crossover so I have to build one.
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On 3/13/2020 at 7:32 PM, DrumNBassNThePlace said:
I'll tell you now why. I did not have these shipped to me, I drove to a shop to pick them up. Shipping to you UNINSURED via FedEx ground with no signature required is $100 for the pair. I just looked it up. Now you can get a new pair for just over $200 or buy my almost new pair for $200 shipped to you. They have really jacked up shipping rates.
They always charge much more for shipping to a foreign country. ;D
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Far less.
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3 hours ago, twistedcrankcammer said:
Hey Dave A.
Last I knew, the Diaphrams were still available.
Shoot Joey Brogna a PM as I don't remember where, but I am sure he will. If you don't have any luck, PM me in about a week and I will give him a call.
He goes by Joey B on the forum.
I have owned KP-450s as well...
Rog
I got a real OEM one off EBay for $67 shipped and should be here Tuesday.
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12 minutes ago, risingjay said:
@Dave A I only have one KPT-904M-B crossover and it doesn't have the polyswitch.
That is nothing like the little PC board mine are on. Is that an OEM board?
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1 hour ago, FMnoise said:
Dave: That looks like a 1.10 Amp polyswitch, not a 0.5 A. They are rated for current and usually paired with a resistor in parallel. Here is a link to where you can purchase one.
I did end up getting some of those a while back.
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OP what is wrong with the speakers that they can't be reused on the new system?
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You have immunity Jim. Just use the hot sauce.
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9 minutes ago, Bosco-d-gama said:
Remember it is not just the number of fatalities associated with the corona virus. It is the details behind those numbers. The virus has been called a ‘perfect’ killing machine for the elderly which is where we see most of these deaths. If it were children or young adults would you be more concerned? Now look at Italy where the virus has a more predominant presence. In Italy the healthcare systems are buried in critical patients so such a degree that any person requiring hospital care for any reason now gets delayed or poor care. In other words people are dying of other things because the corona virus has plugged up access to critical care. And believe it or not, Italy has more hospital beds available per person than we do.
Take the virus on it’s face value. It is new to humanity and insanely infectious. It makes lots of people deathly ill and they require extensive critical care to ‘maybe’ survive. Left unchallenged the virus would inundate our hospitals with very sick people and compromise healthcare for anyone needing care. The virus could wipe out most of our elderly if left to run rampant. Most importantly every person who gets the virus will manufacture ‘trillions’ of copies of that virus and those will not be perfect copies. They will also mutate. If they mutate into something more virulent the virus could become a ‘perfect’ killing machine for everyone.
You mean like pneumonia? How many elderly die from that each year? What details and what proof of your premise about never before and unparalleled danger and the rest is there on this? Lots of people deathly ill and what as a percentage of population do you consider lots? There was a time when something like the Bubonic Plague would run it's course with horrible consequences and no way top stop it but today these things can be fought. Italy has an older average population than any other European country. Elderly are by nature less resistant to ALL disease so of course they will die more often from these types of things and that is the nature of life itself. There is a far greater percentage of older people who die each year than young people and there is nothing that will ever change that. I hear 6:00 news channels speaking and not the reality that is reflected by cold hard statistics. Calm down and quit watching and believing the TV set.
Reading an article just now that states 4/5 of all the deaths in the EU are among those who are over 65. So yes based on that you could easily say 4/5 of all resultant Wuhan flu deaths will be in that same group and it will not change. That same group will die of something far more often because that is just life. I am 67 so I am now in that group but I am not going to let some hyped up thing scare me to death.
If it were young and the children dying the most darned right I would pay far more attention than old people. The young have not lived long enough to become old where each and every one of us, if we make it that far and most do, will unavoidably die. No cure for age. "perfect killing machine for the elderly" is media BS. Age is the perfect killing machine of the elderly.
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Polyswitch ID
in Klipsch Pro Audio
Posted
Here is something to consider. How many options were out there then. For example could crossovers be ordered for behind screen or side fill or arena usage? Did some come with THX limits and others not? Were they made for the 510 or 402 horns? You can't find answers to all this anywhere I have looked. The Hunter suggestion if you are really curious is a good one since he might have records or know of the decisions made.