My history with large panel ELS is fairly extensive. I owned over the years, Dayton-Wright XG10 ELS, Acoustat III, Quad 63, and Martin-Logan Monoliths (which I still own), and listened to many more. Only the Quad 63 was fairly immune to beaming, though it still did at higher frequencies. And the Quad had a host of other problems.
As for bass, again, what ever works. Below 50 Hz there probable isn't much difference on source type and I agree that multiple subs is the easiest way to go, particularly if the room is oddly shaped.
Lets not go over board. I never said that I disliked dipoles or the Orions, but, yes, I do see this approach as having more problems than it solves. The dipole part of the Orion is its best feature, its above that, where the midrange and the dual tweeters are used that I find pretty average. The bass is excellent, almost on par with multiple subs. Headroom in the Orion is seriously lacking for Home Theater.
Me too.
John, I've asked you this before but got no answer. I, like you, still do a lot of work in FORTRAN. I don't klnow if you are aware of it, but many of the better FORTRAN compilers will not run under 64-bit OSs. I found this out the hard way. What compiler do you use? Have you any experince with; the Intel, LAHEY,or AbSoft FORTRAN comilers? Any help would be appreciated as I have to get a new one since MS/DEC/COMPAC is no longer functional under the new windows.
i have triple boot on this laptop:
Mac OSX Snow Leopard ( 64 bit )
Windows 7 Ultimate ( 64 bit )
Windows XP Black Edition ( 32 bit )
worked quite well until i tried to installed Linux which only killed my Windows 7 install ...
http://hydtechblog.com/2009/01/26/d...-x-ubuntu-linux-windows-xp-and-windows-vista/
instructions worked up until the Linux part ...
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so you agree with using multiple subs below 50 hz or so and a stereo setup using large dipole arrays between 50 hz and 200 hz or so ?
Meaning what? That this is optimal - no! Could this be made to work, probably, would it be cost effective? No!
You end up with too many crossover points, some at very low frequencies, the whole design ends up being overly complicated and expensive (ala Orion). Not for me thanks.
I just use GNU project, G77 compiler.
Free FORTRAN Compiler
Codes (*.f files) must be written using a text editor and then compiled from a DOS window.
I also have an old windows interface that was developed by someone (?) called Force2. It is basicly a text editor couupled to the G77 compiler. It hasn't been updated since 2002. Here is a link to Cnet for download:
Force - FORTRAN Compiler and Editor 2.0.7 - Free software downloads and software reviews - CNET Download.com
It's great, but I don't think the fortran library that is packaged with it is complete. It is packaged with the G77 compiler and I could probable just copy the library from the GNU package over to the Force folders, but I've never tried that.
By the way Earl, here is a look at my latest OB system. Can be driven with a single amp. Has and F3 of between 25 and 30 Hz (depending on how the bass eq is set). Nominal sensitivity 90dB and max SPL for single speaker is better than 100 dB at 30 Hz.
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On a laptop, which can only have one Hard Drive, is it possible to install an XP partition over a Win 7 64 bit? I think not.
I travel back and forth to China and I have operational FORTRAN compilers at each fixed location, but I cannot seem to get a good solution for my laptop - it shipped with Win 7 64 bit and I would have to purchase a copy of anything else. I would of course want the same compiler at all three locations for obviuos reasons.
John
One thing that I have noticed about your approach to loudspeaker design and mine is that we place much different empahsis on different frequency regions. I virtually ignore 200 - 500 Hz and obsess over 1 kHz - 6 kHz. Your designs all seem to be focused on that region that that I find, if not unimportant, certainly easy to satisfy. Do you see things the same?
Actually you can run other operating systems within your current OS. You can do all sorts of cool stuff with modern computers which very rarely utilize their full potential processing power.
Virtual machine - Wikipedia, the free encyclopedia
I actually want to turn my current computer into a multi-seat setup with 2 operating systems or more running at the same time with 2 monitors, keyboards, and mice.
Virtual machine - Wikipedia, the free encyclopedia
I actually want to turn my current computer into a multi-seat setup with 2 operating systems or more running at the same time with 2 monitors, keyboards, and mice.
Easy to satisfy? I found there to be detrimental adjacent-boundary and modal effects. Maybe your room behaves very well so you never experienced first hand what plagues most of us?
Best, Markus
Could you be more specific? Modal effects in this region (> 200 Hz) are not definable (there are thousands of modes), but yes there will be interference effects from reflections. But from all that I understand, we are simply not that sensitive to these effects at those frequencies.
Earl your entire philosophy seems to be based on the notion that human ears are not sensitive to basically anything at all.
Even if that were true i don't think you could sell high-end speakers based on that claim.
You already know i disagree with your assertion that stuff above 10 khz is irrelevant.
But i also think 30hz - 200hz is probably the most important range in music. as well as most difficult to "satisfy" in an average room.
I'm mostly a Mac guy, so what follows may be uninformed and/or biased, so take it with a grain of salt.
When I use Windows, it's to run programs that are not supported in the Mac OS X environment - and I don't want to futz around with virtualization incompatibilities, missing or broken drivers, registry errors, etc. I just want it to run without a lot of backtalk and clever excuses from the software vendor. So I look for the mostly broadly supported OS in the most common, most stable version - and today, that looks like the current Service Pack for Windows XP Pro 32-bit. If there's a worldwide default operating system, that's it.
Unfortunately, you have to get that from Amazon, and worse, pay a premium for a genuine version of Windows XP Pro with a late version of the Service Pack. Buying from a vendor with good ratings costs more, but avoids the potential of buying a pirated version that Microsoft won't support.
I agree, it sucks to buy a brand-new laptop and shell out another $250 to $300 just to get an operating system that has widespread support from third-party vendors. That's what I did a couple of months ago when I bought a MacBook Pro and set up a second partition on the hard disk for Windows - rather than wrestle with Vista (ugh) or Win 7, I took the easy way out and installed a NOS copy of Windows XP Pro, 32-bit version. So far, so good, and Trend Micro Internet Security seems to be doing a good job of keeping the bugs away while not bringing the machine to its knees with file-inspection overhead.
If it were a fresh PC laptop, I'd reformat the hard disk (getting rid of all the crapware in one stroke), and install the same thing - not because it's the latest and greatest, but because it still has the broadest support of any OS out there.
If I were a serious PC user - a gamer or somebody who pushes the machine to its limits (overclocking, etc.) - the advice would probably be different. But I'm not. For me, Windows is a tool to get the job done, and all I care about is reliability and usability with XYZ software package.
I get very annoyed with software vendor excuses why this or that doesn't work, so if the machine is an all-Intel architecture, with a common video chipset, and running Windows XP 32-bit, I can be pretty confident the problem is with the software, not the operating environment. That simplifies the debugging and keeps down the amount of finger-pointing between vendors.
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Earl
If modal effects play a major role >200 is debatable and one would need to look at each situation individually.
Around 200 Hz voices and lots of instruments have their fundamental tones. Although there is a psychoacoustic effect called "virtual pitch" (our hearing perceives pitch although the fundamental is missing) this is not accurate sound reproduction and the sound sensation is different from unaltered fundamentals.
If modal effects play a major role >200 is debatable and one would need to look at each situation individually.
Around 200 Hz voices and lots of instruments have their fundamental tones. Although there is a psychoacoustic effect called "virtual pitch" (our hearing perceives pitch although the fundamental is missing) this is not accurate sound reproduction and the sound sensation is different from unaltered fundamentals.
ok but what's the alternative ? don't say run multiple subs to 300 hz
i believe that bass can be localized to very low frequencies ( much lower than the official 80 hz number ). i would like to have stereo down to about 50 hz.
didn't you just state in this thread that dipoles have very good bass ? better than sealed speakers i assume.
of course it is simpler to run sealed speaker to 100hz and multiple subs below that ... but that compromises stereo in the 50hz - 100hz region as well as compromises in-room bass response 100hz-200hz. doesn't it ?
i mean the question wasn't whether it is "worth it" but whether it was best. at least thats what i wanted to ask whether or not i actually asked it
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yes. macbook pro with dual boot into windows XP 32 is the way to go. but i upgraded the hard drive to 500 gig in mine so i had space for Windows 7 as well.
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