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WMcD

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About WMcD

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  1. From now on I keep my mouth shut. Ziiiiiip!
  2. That is not enough information to get us to a specification. Can you tell us more, please? Particularly regarding the subwoofer. Reviewing the Klipsch website I note that most 5.1 collections are just five (5) speakers to attach to your home theater amplifier / receiver (with one caveat of the 0.1 subwoofer). Therefore if that is set up for your mains, things are okay. The caveat is the subwoofer 0.1 included in the collections. The sub contains its own amplifier which is connected to the mains and therefore must be compatible with that higher voltage --- or a step-down transformer is needed (dropping mains 240 volts down to American spec 110-120 mains volts). I've looked at the photos of some Klipsch subs and notice that the voltage input from the mains is listed at the back plate as being 110 to 240 volts. You must check what you have of course. But that means the power supply for the internal amplifier in the sub is designed to adjust to the various mains voltage. All you will need in theory is the correct plug connector to go into your wall outlet. Some have a wireless transmitter and that must be considered too. It probably has a "wall wart" transformer. Please do confirm this with a dealer or whoever is selling you these items. If there is a failure you'll need someone to address the situation. $$$$ WMcD
  3. My guess is that it is not from Klipsch and is home-built perhaps based on EV plans. There is no label on the bass bin (right?) and no markings on the crossover (right?). The Real McCoy would have both these. The mid-horn seems to be a Cobraflex by Electrovoice -- to my knowledge Klipsch never used those but rather his own K-5 or K-400. OTOH EV probably did use them in one of their licensed K-Horn variation IIRC. The drive is a University? Klipsch did use those early on. OTOH the crossover looks sort of Klipsch. As always, I stand to be corrected. WMcD
  4. WMcD

    Have a Action figure

    Yes gang. Collect all your favorite Klipsch action figures: Paul, Valerie, Roy, Jim, and Trey and join them as they battle Amar the Merciless. They make terrific wire supports too. Thebes action figure available 3Q 2020.
  5. 40 kHz MHz probably. [edit] I would say that there are plenty of units run by PComputers which will do audio range stuff and have the capacity to store and print waveforms and FFT. Granted they are going to be about 3x what you're talking about. WMcD
  6. Following the wisdom of others above, no bitmap files please, i.e. the ".bmp" extension.
  7. I can't agree with my buddy Thebes' rant about picture file size. I love him anyway of course. People are not exercising the sense that God gave a goose. Modern cameras create huge files and then people think they should post them with no consideration for technical limitations. The 100 kB figure is probably a pretty good example of how small they should be before posting. Maybe a lot less. I've long suggested that anyone open their picture in MS Paint. Big files will fill 10 screens there. All you have to do is resize to something which fills the screen in MS Paint. and no more It is all that the forum will show on anyone's browser screen. Happy New Year. WMcD
  8. I'm with Oldtimer. I believe that putting the sound though a microphone and putting it on the Internet, and then playing back can not possibly reveal the merits of a speaker. OTOH, I'm an ex-New Yorker and Gutenberg's personality is familiar. Yes, Best of New Years everyone. WMcD
  9. Black nail polish. But do test in an inconspicuous spot on the box.
  10. If you are saying you're going to put two K-77 or two K-55 in parallel and connect the parallel to one crossover output: That is going to ruin the crossover frequency. These analog crossovers are designed with a specific load impedance. (Actually they are designed for a specific input impedance and this is established by the output of the power amplifier. This is usually about 0.01 ohms for a solid state amp.) If you put the inputs of two crossover in parallel with the two K-77 and K-55 drivers connected as normal: That is going to create a load to an amplifier which is half that of normal (in the frequency range where the speakers are operating.) (You have not mentioned what is going on with the woofer. ) In our case the input impedance presented by the crossover to the amp is fairly high, i.e. above 8 ohms and therefore the parallel load is about just above 4 ohms which is not very very bad but might trip the current limiter on some amps. Overall, I say to not do either. One ruins performance of the crossover. The other could damage the amp. " Two top hats both left and right, one amplifier? " I think you don't mean to say there will be one amplifier channel for each side but it could be read to mean there is one amplifier (mono-block) for eight drivers. The latter is really problematic. [The strikeout is an edit, sorry.] WMcD
  11. Well, I got into the rant which was basically my retelling of how I figured out some of mysterious explanations. Leading and lagging imply time advance and delay but that is really not the story. ---- I recall in college walking up the hill from the engineering building to the main campus with a good professor of physics. Seems like a charming mentor and student situation, don't ya think? I asked, "How does a bicycle work?" He said, "That is a very complicated question." Then silence. I thought, "He doesn't know either but he doesn't want to admit to it." - - - On impulse response of a device: I just re-listened to Days of Future Past on the Internet. At the end there is a gong sound. So we hear the impulse response of the big cymbal. Not a bell-like response. Sort of multifreq shimmering with decreasing amplitude. What is interesting is that in the opening seconds of the album there is a shimmering sound of increasing magnitude. I think it is a reverse playback of the same. Therefore we get to hear the impulse response reversed in time. End of Rant 2 and Good Night.
  12. FWIW, the Linear X LEAP system manual IIRC has a suggestion on where to assume the source of the sound from a driver. It is the front plate of the magnetic structure which defines the hole in which the voice coil sits. But I think that is a reference, only. The diaphragm is going to be a bit in front or could be a bit behind physically. Or curved to make it both physically behind and ahead. Ugg. - - - FWIW. The driver and the rest are what is called a "causal" system. Whatever we use as an input, the output occurs later in time. That is the real world. We can't make a system which which looks at lottery results on Tuesday and sends it to us on Monday so we can place bets. The sci-fi of time travel paradox is built on this fiction. An impulse input contains all frequencies with the same zero crossing. When we look at the output even at the diaphragm, the output is later in time. The input impulse is smeared out when we measure at the output. We see graphs of that. Similar to a bell ringing though that is a narrow freq. It means that the various frequencies are delayed by different amounts of time. It arises because of the bucket brigade nature of interacting components which store and release energy. Anyway, we can look at the frequency components of the smeared out impulse. We see sinusoids (e.g. sine and cosines are the very same shapes and generally called sinusoids). These are always delayed frequencies. There is no "leading" when compared to the input frequencies in the input pulse. Nothing happens before it is caused in the real world. At best, if output sinusoid B is delayed less than sinusoid A, then it might be said to be leading A, but it is not a matter of the system moving it ahead in time. There is no Delorian here. - - - End of rant.
  13. It's like the red paint that makes Ferraris faster than other cars. (Edit, I removed the apostrophe but I'm still not comfortable with the plural of a trademark.)
  14. I was thinking that the wire maybe subject to scuffing and other physical damage. Perhaps the wire used on outdoors low voltage lighting systems which is made for direct burial would help. Other wires rated for direct burial too. The other issue may be strain at the connection to the amp and speakers. Short lengths of any sort could be brought to stoutly mounted professional Neutrick connectors as shown at Parts Express. I've ever used them but you see the issues. WMcD
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