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  1. Jon Hancock

    help on theater design

    Well, Pat, Bryan is doing a pretty big room with a 160" FPTV setup, so I suspect sheilding isn't much of an issue. ;) I'm not surprised to hear your feedback of experience with the Vifa M18's; my only reservation at all with the HTS system is the driver spacing and relatively high crossover...
  2. Jon Hancock

    help on theater design

    Bryan, Sounds like you've got a nice big room to work with, but it does present some challenges, though if you can find a DIY setup that meets your needs, that may help with the cost. But, I'm inclined to agree with some of the others here that you'll have to be careful selecting a...
  3. Jon Hancock

    Best DVD player for FP?

    You don't mention what kind of front projection system you have. If you have one that handles 1080i well, my recommendation would be the Zentih DVB318. I bought it to supplement my HTPC, and now I'm using the HTPC very little. It's ONLY used on 1080i upscaling mode; it does so on both...
  4. Jon Hancock

    NEW dvd player, is Faroudja worth the extra $$

    The DVB318 and it's sibling, the 7832, appear to be free of the Chroma bug. BUT, the 480P and 720P output are something a bit less than stellar. OTOH, the 1080i component output is very, very good. This is a great DVD player IF you have a 1080i input display. If you don't, pass...
  5. Jon Hancock

    Considering GR AV3s, here come the questions.

    Hi Hank, Lovely work as usual from you! :D It's not easy finding veneer that nice! Not to gloat, but Hank does sometime share his secret recipe with folks if you ask him real nice... he's that kind of gentleman... Works great on Oak and walnut, too! ~Jon
  6. Jon Hancock

    HTPC vs Stand-alone DVD Player

    But HTPC's can be equipped with SPDIF outputs also, in fact mine, using the nforce chipsets, encode ALL PC audio to Dolby digital. Best regards, Jon
  7. Jon Hancock

    HTPC vs Stand-alone DVD Player

    HTPC's come into their own when you use the VGA output, or VGA transcoded to component, into a HD ready set or front projector set that accepts multiple inputs. Just using it with S-Video output, which is typically not done very carefully with most PC video cards, is probably not the best use of...
  8. Jon Hancock

    Want to learn what's involved in a "good" DIY design?

    I tried to get a copy at Borders yesterday, but they still just had an August issue! Hard to believe it was two years ago I started this project! Slow work takes time! Right now, I'm working on the ulitimate illogical extension of the M8 concept, and also getting back to my roots, in a...
  9. Jon Hancock

    Cheap Table Saw

    Yes, the Sears 28211 is a "clone" of the BT3000 with the Craftsman name, so you can get a lot of parts that are compatible through Sears- that's how I got my micropositioner, as many HD's don't carry the Ryobi version. Most of the other accessories are compatible, though there are slight...
  10. Jon Hancock

    Cheap Table Saw

    I looked at the Hitachi, and almost bought one. It's only significant liability is the rip width- it didn't meet my needs for one of the two projects planned this year. Like Jeff Todd above, I ended up going with the Ryobi BT3100- it's an amazing value, I got mine on sale for 10% off, it has...
  11. Jon Hancock

    Help me understand Terminator 2 Extreme's 1080p transfer

    There's a lot of folks out there that use HTPC's extensively- in my home, there's two DVD playback systems based on computers (main living room, and my bedroom), and only one using a set top box DVD player (teenage daughter's Toshiba SD9000). This WM9 release is something anyone with a PC...
  12. Jon Hancock

    almost done with my new M8a towers

    Hi Chris, Tibor is doing pretty well, fairly happy with his MTM variants- they're really nice, with Zebrawood veneer! I'm something of a sport bike fan, have an old CBX, too, and a Hawk 650 V twin. Lusting after the new Interceptors... but spending money on speaker parts and tools! -Jon
  13. Jon Hancock

    Pictures of my DIY speakers

    Nice job on the cabinets, Anthony! And kudos for the room treatment work- this is unfortunately something a lot of folks ignore, much to the limitation of their system performance. Room acoustics and speaker placement are so critical.... Happy listening! Best regards, Jon
  14. Jon Hancock

    almost done with my new M8a towers

    Having pretty much recovered from some back surgery in February, I've been pretty much buried alive now at work, and do have a lot of travel coming up, including overseas. I have a set of the MKIV's, but they're stashed away while I'm working on a new system and re-oganizing and packing for...
  15. Jon Hancock

    Marchand crossover questions

    The Marchand crossover generates a nominal 4th order L-R crossover by using a multiple pole state variable low pass filter. The output of the low pass filter is subtracted from the full range input to generate the high pass output. The low pass is formed by four integrator stages. The capacitor...
  16. Jon Hancock

    Help, wear to find covering for sonotube.

    Another fairly easy to work with and very durable material is short pile indoor/outdoor carpet; "TubeZilla" was covered with gray carpet from Home Depot; black is available also. Link Removed Cats love it as a scratching post.... ;) Regards, Jon
  17. Jon Hancock

    Please read: Future and current DIYers

    Jack, Horrors.... shurely u r knot impplying that the kar guys are literacy challenged, r u? :b I resemble that remark! :D -Jon
  18. Jon Hancock

    Why BluePrint drivers are not as popular as Shiva's or Tempest's?

    With loudspeaker drivers, including subwoofer drivers, you can get to a point of diminishing returns. I've built subs with Shiva's, Tempests, the Styke HE-15, and the Blueprint 1203. When you get into the very long throw woofers (around an inch Xmax one way), there are issues related to...
  19. Jon Hancock

    need some x-over advise before I build...

    Ron, This looks a *lot* better than your original graphs- one question for you- are you (or the program) taking into account the difference in time offset, assuming you're mouting the tweeter and midwoofers on the same baffle? It *looks* like possibly you are, since the woofer corner and roll...
  20. Jon Hancock

    need some x-over advise before I build...

    I think this thread has taken an unfortunate turn; the fun of DIY is that everyone can try out and experiment with what works for them. Danny, of course, isnt' strictly speaking DIY; he's in this as a business, and I can understand from that viewpoint why he would be more sensitive to...
  21. Jon Hancock

    need some x-over advise before I build...

    Hi Ron, Back again- busy evening, didn't have a chance to go online (daughter is graduating this Friday from High School). First, let me say I've looked at and used some of the Focal woofers- I actually prefer some of the V series over the K and W series, I'll explain why. On the...
  22. Jon Hancock

    need some x-over advise before I build...

    Yes, that may be Ron, but you can't do accurate crossover filter calculations if the impedance curves are wrong- so if you're using data supplied with the crossover design program, which has invalid impedance cuves, then inherently the crossover filter design will be incorrect. For example, if...
  23. Jon Hancock

    need some x-over advise before I build...

    If your crossover design program is using "simulated" impedance from T/S parameters, as opposed to a measured curve, there's a real chance for haviing "garbage in, garbage out". Looking at the impedance plot, your LF resonance (sealed?) is at about 18 Hz, not remotely in the ball park for the...
  24. Jon Hancock

    baffle step elimination (would this work)

    Hi Hank, There's no substitute for making your own tests and and measurements, but consider getting that 1-1/2" bit- a good working radius for diffraction control by shape alone is in the 1-1/2" to 2" range, IMO&E. I fully agree with Dan's comments- this is why a round cabinet or round...
  25. Jon Hancock

    baffle step elimination (would this work)

    Hi Hank, I'm going to stir up the pot and throw a few points into the discussion. Baffle step occurs when a loudspeaker transistions from radiating into a a half space (forward from an "infinite" plane) to full space. Because the distance most speakers are from adjacent boundaries is...
  26. Jon Hancock

    Best sounding op-amp?

    Hi David, Some would say the best sounding OpAmp is no OpAmp, but that's perhaps a bit harsh. There's a lot of opinions floating around about what is best, and let's not forget that implementation is important, too. I like the AD825; I suspect that the very fast settling time has...
  27. Jon Hancock

    Alpha LS (Possibly the coolest DIY speakers )

    Do you have measurements of these posted, particularly for the Neo8 line array? I did some measurements of just two in a vertical array, for a friend who was interested in them for a media speaker. These were mounted on a 2' X 4' dipole baffle, to try to keep LF baffle loading issues at bay...
  28. Jon Hancock

    Heres a render of one tower idea. . .

    Very nice looking renders, a lot prettier than what I get out of AutoCAD! You've got a pretty nice shot at a great speaker, here. A point to consider, I think you may have problems with finding a low restriction 90 degree bend for your port. Also, a 12" woofer ought to be run with a minimum...
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