Edgar

My favorite memories from Maine are Mount Kineo (I have a beautiful photograph of Kineo across Moosehead Lake) and hiking the Precipice Trail at Acadia Park. "Kineo Design"? "Precipice Audio"?

DisplayPort only supports audio up to 6.144 Mbit/sec (Wikipedia). If you want to pass 8 channels, the best you can do is 16 bit / 48 kHz.

Beyond a certain point there are diminishing returns. Essentially all modern audio equipment is well beyond that point of diminishing returns. Besides, your source CDs are sampled at 44.1 kHz, so the 48 kHz sampling of the DX38 at least doesn't reduce the bandwidth any more than has already been done. To some extent, high end CDs and DACs are intended to separate you from your money, and nothing more. You are confusing the conversion from analog to digital with the storage and transport of digital. Lossless formats like flac are simply efficient ways of storing information, and have nothing to do with its conversion. Depends upon how good your hearing is. There are always differences. Whether they're significant or not depends upon who's listening. Mathematically speaking, this is simply not true. As long as some fundamental mathematical parameters are met (and nowadays they always are), this is a non-issue. If you are hearing differences, then they are coming from the ancillary electronics, not from the sampling process itself. Greg

Understand that I had NOTHING to do with the design of the DX38. I worked for EV long before the DX38 came around, but companies tend to re-use their software whenever possible. Greg

Well, if they're still using the software that I wrote for them (and I have no way of knowing whether they are or aren't), then with the settings that I described all processing is truly bypassed. It's different with digital signal processors than with analog signal processors. For example, in the compressor/limiter software there is probably a code statement that says something to the effect of, "If the signal level is below the threshold, then skip the dynamics processing code entirely," or, equivalently, "If the signal level is below the threshold, then multiply the signal by exactly 1.0." That's how I implemented dynamics processing when I worked for EV, but as I said I have no way to know if they're still using my stuff. (a different) Greg

Page 8-12 of the DX38 manual shows the minimum compression ratio to be 1:1, so that is how to bypass the compressor. Page 8-6 shows the minimum Master Delay to be 2ms. This is probably hardware-related, meaning that it is the fundamental delay for a signal to pass through the electronics themselves. As long as the delay is identical in all channels, it is not a problem. Page 8-11 shows the minimum Channel Delay to be 0ms. That is how to bypass the Channel Delay. Page 8-13 shows the maximum Limiter threshold to be 8.7V. Page 10-1 indicates that the maximum output voltage is rated at 8.7V, so the maximum Limiter threshold corresponds to the maximum output level, and you can effectively bypass the limiter by using the maximum. Greg

Reminds me of getting driving directions in New England: "If ya get ta wayah the Jacobsen's bahn used ta be befowah it buhned down, ya gone too fah."

Tell it to the judge.

So let me get this straight: The "end" (you obtaining something that you otherwise could not afford) justifies the "means" (counterfeiting) exactly how? You could print some counterfeit $100 bills on your color laser printer and use them to purchase the genuine article -- that's a means to an end, too. How is that any different?

You can make a close copy, but in America you can't sell it. That's called a "knockoff", and it can get you into deep, deep trouble. Bush Inks Anti-Knockoff Measure

Many years ago I lived in half of a duplex. The other half was occupied by a couple of college kids who played loud music at all hours. I finally got them to quit by borrowing an EV P3000 amp from work (1300W/channel @ 4 Ohms) and playing Inna Gadda da Vida through my Legacy Focus (96 dB SPL @ 1W). Afterward I knocked on their door, and when they answered I said, "If you want to have stereo wars, you are seriously outgunned."

They do the same thing that the output transformers on a tube amp do. The only difference is magnitude. Tubes like a load of a few thousand Ohms, while actual speaker loads are only a few Ohms. The output transformers make the speaker load of a few Ohms look like a few thousand Ohms to the tubes. In the case of the Zeroes, the transformers make the speaker load of a few Ohms look just a little larger, maybe two or four times as large. Some amplifiers like the modestly higher load impedance. I know Paul Speltz from my former affiliation with the Audio Society of Minnesota. I found him to be a straight-shooter. Greg

There are supposed to be small thumbwheel speed adjusters. Edit: Sorry, saw "2402" but my mind said "4002". But an Internet search should still get you answers.

If you will be using one of the ATI Radeon 4x50 cards, then you'll need Realtek HDMI Audio drivers. For Vista, download here (under "Software"); for XP download herehttp://game.amd.com/us-en.

http://hornloudspeakermagazine.blogspot.com/2008/11/comprehensive-list-of-klipsch-plans.html

There are a couple of possible explanations. - First, I didn't measure a Klipschorn; I measured a Speakerlab K from a set of 1980 plans that I have. It is possible that the Speakerlab was not a completely accurate copy of the KHorn. It is also possible that the KHorn internal design changed with time. Or it is possible that the KHorn didn't actually use a rubber throat. - Second, in the KHorn (Speakerlab K), the woofer opening is 39in², but that dumps directly into a horn whose throat is 78in². Perhaps that is what someone has called a rubber throat? Greg

It looks like it will fit in the KHorn woofer chamber. However, I currently have neither a KHorn nor a 515 with which to check. Greg

Here are the best five performers that I was able to find, out of dozens that I tried. Parameters as indicated in the lower right corner of each plot. In each case the K33E in the stock horn is shown in gray for comparison. The absolute best of the lot is the Altec 515-8GHP, but I wasn't even going to include it because I thought that it was unavailable. But this morning I was browsing the Great Plains Audio site and discovered that they're now making them again! The BD-15 is within about 1 dB of the 515, but is quite expensive. As far as I can tell, the B&C 15PE40 is not available in North America. I don't know about availability of the Ciare 15NdW1. The EV DL15X should be readily available. If not, the DL15ST is essentially identical. Greg

In applications such as ports on vented boxes, yes. In horns, I think that the predominant problem with small throats is "horn throat distortion", which is related to nonlinearity of air at high pressure. While that can be a problem at the high SPLs used in sound reinforcement, for home use I doubt it. Yes, even Roy has said that PWK was quite fond of rubber throats ... though for the life of me I have never been able to figure out why. Greg

K33E in black, BD-15 in gray. The "ideal" K33E horn also uses the optimum throat size predicted by Keele (which is NOT the same as the optimum throat size for the BD-15) and slightly smaller than stock back chamber volume. For this plot I just used an exponential expansion instead of the piecewise conical approximation; the results are within a fraction of a dB of each other. The "original" BD-15 horn is unmodified from stock Klipsch spec. Agreed. In the "ideal" model I tried to limit the modifications to reduction of cross-sectional area, because it's a lot easier to make the area smaller than it is to make it larger! The exception is in the region between approximately 50cm and 90cm, where the area can be enlarged by making the internal "wedges" smaller. All completely true. Models don't substitute for measurements, or for construction! Frankly, I think that the addition of corner reflectors would probably have more significant effect than the relatively minor changes in cross-sectional area. The "foldback" region, where the path hits the corner and turns nearly 180° to exit the horn, seems to be particularly troublesome. Greg

http://www.retrothing.com/

Here's some interesting food for thought. In post #1181505 I graphed a carefully measured internal path for the KHorn, and a Hornresp model for it. Well, I've been experimenting a bit with that Hornresp model and some alternate woofers. And, if you're subwoofing your KHorns, so you can afford to give up a few Hz of KHorn bass, Hornresp says that you can improve the midrange response of your KHorn by a considerable amount. In the attached graphic I have duplicated that earlier internal path graph, only this time I've added a green line that shows the modifications suitable for use with a BD Designs BD-15 woofer. (This is a VERY expensive woofer, but there are less expensive alternatives that perform nearly as well.) And the Hornresp graph below that shows the improvement that results from the internal modifications and woofer substitution. (Black line is BD-15 in modified horn; gray line is K33E in stock horn.) As always, models don't substitute for measurements, but this certainly points in an interesting direction. Greg

Hornresp is a horn analysis and modeling program. You enter the dimensions of your horn, and the measured parameters of your woofer, and Hornresp predicts the frequency and phase response, acoustical and electrical impedance, diaphragm displacement, group delay, etc. It's only a model, so the results are only as good as the assumptions behind the model and the accuracy of the input data. But for comparing different woofer drivers in the same horn, or different horns with the same woofer, etc., it's a nice tool. Ideally, you'd like for the frequency response to be ruler flat from DC to light. In the real world, of course, that never happens. In the frequency response plots that are being addressed in this thread, people are wondering what causes some of the peaks and dips that seem to occur in the same places in the KHorn, LaScala, and Belle Klipsch. If they are caused by the woofer, then changing the woofer to a different make and/or model might eliminate them. If they are caused by the dimensions of the horn, then changing the woofer won't eliminate them. Ultimately, as I said before, Hornresp is only a model. While the model can predict general characteristics, the effects must be measured in the real world in order to have any credibility. Greg

Here are the Belle (black) and LaScala (gray), K33E, using the models that I presented earlier in this thread. Greg

Here's a list of some other woofers worth checking-out in this application. I have chosen them because they all show nicely extended high frequency response in Hornresp. But I have not tried them specifically with the KHorn, LaScala, or Belle models, so I do not know how well they will perform with the Klipsch throat dimensions or rear chamber volumes. B&C 15NDL76 B&C 15PE40 B&C 15PL100 B&C 15PS76 B&C 15PLB76 B&C 15TX B&C 400AMX BD Designs BD15 Ciare 15.75SW Ciare 15NDH-4 Greg