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  1. Greg Monfort

    Horn Loaded VS Everything Else

    No, 'harsh' is harsh and indicative of a poor horn design and/or implementation. 'Honk' is unfortunately often used to describe two different problems, the throat distortion of a high compression horn and/or the stepped response of a traditional hyperbolic, exponential or some flare type...
  2. Greg Monfort

    Forget about the Sonic T amp, this is cheaper.

    Greets! Thanks for sharing! This unit specs similar, do you know if it's 'close enough' to having the same electronics? http://www.walmart.com/catalog/produ...em+Description FWIW, I use the PD-65 also, a lot of bang/buck, especially on the bottom end, and looks good to boot. TIA, GM
  3. Greg Monfort

    Ceiling Construction?

    Greets! Ideally you want to mimic a full size cinema's layout, so you'd build a room-within-a-room with the sides and ceiling sloping away from the screen wall like a linear expansion horn except that due to its acoustically small volume WRT the soundtrack's BW, the rear wall needs to peaked...
  4. Greg Monfort

    Options for subfloor in basement with low ceiling?

    Greets! Historically, jute padding was/is used in vehicles, basements, etc., since it has good acoustic damping properties and can be 'hung out' to dry, just like the carpet, but today's various carpet's construction only work well with certain padding materials, so Caveat Emptor...
  5. Greg Monfort

    Pictures of HT progress

    Greets! FWIW, I could only make out the first two mudded walls ones, the rest were too dark even with my monitor turned up to as bright as it will go. GM
  6. Greg Monfort

    Re: Baffle Step Compensation

    Greets! Depends on the speaker design in that good designers incorporate into a multi-way's XO, though for single or wide BW driver designs it's a separate filter. GM
  7. Greg Monfort

    I want to build a waveguide!

    Greets! 'Tip o' the iceberg' to get you started;): http://www.diyaudio.com/forums/showt...threadid=85910 http://www.aeronet.com.au/waveguide.htm Overview: http://home.carolina.rr.com/charlieh...WhitePaper.pdf http://home.carolina.rr.com/charlieh...eguide-Fr.html...
  8. Greg Monfort

    I need floor spikes.

    Greets! I use to make mine out of screws or nails, but you can buy fancy ones now: http://www.partsexpress.com/webpage....up_ID=139&SO=2 GM
  9. Greg Monfort

    Looking to build a high output music sub

    Greets! Not a very compact one (relatively speaking) if tuned low, though a PA style compression loaded or scoop style midbass horn could have as much as ~37% eff., so up to ~108 dB/W/m over a fairly narrow BW. A large corner loaded TL high SQ and gain, but again, its high Vas will mean a...
  10. Greg Monfort

    Certified Dimensions

    Greets! http://www.myhometheater.homestead.c...alculator.html http://www.audioholics.com/techtips/setup/index.php http://www.audioholics.com/techtips/...akerlayout.php GM
  11. Greg Monfort

    Piano black...which technique?

    Greets! http://www.woodweb.com/knowledge_bas...and_Piano.html GM
  12. Greg Monfort

    Learning about crossovers - where to begin?

    Greets! Historically, you learn electrical filter theory either in college or at the library, then once you have a handle on it you step up to acoustic filter theory. That said, the aforementioned Weems book is pretty good, as is Ray Alden's Advanced Speaker Systems, as are these...
  13. Greg Monfort

    Home theater/sports room

    Greets! FWIW, browsing the galleries at various HT forum sites is where Iwould look first for ideas. GM
  14. Greg Monfort

    White or gray, and smooth or rough screen?

    Greets! It depends on the room's ambient light and how much light either the projector can uniformly 'throw' on the screen and/or increase the screen's gain at the ideal footlambert measurement to offset it. IOW, a picture's 'black' level can only be as deep as the screen looks without the...
  15. Greg Monfort

    MY soon to be HT

    Greets! You're welcome, though we'll have to agree to disagree since 'guidelines' tend to be 'rules-of-thumb' based on opinions, whereas THX, SMPTE recommendations are based on human hearing and vision perception research that began in ernest almost a century ago at Bell Labs. I assume...
  16. Greg Monfort

    Big Screen Mattes

    Greets! You're welcome! I've used both magnets and Velcro to attach various things and prefer magnets where repetitive assembly is desired, so will use them on my masks once I get around to making them, but good luck getting them to stick to aluminum though, it's non-magnetic. :frowning: GM
  17. Greg Monfort

    Question about sound absorbing material

    Greets! Sound damping drapes, especially heavily pleated ones, will damp mids/HF and reflect lower frequencies somewhat, leaving the room sounding 'dead' if too much of the wall area is covered. If the floor is densely carpeted also, then the bass lines can be 'heavy' to the point of...
  18. Greg Monfort

    Big Screen Mattes

    Greets! Why not this nifty DIY 'motorized' ;) system?: http://dustin.bunnyhug.net/screen.php GM
  19. Greg Monfort

    MY soon to be HT

    Greets! Can't comment about the overscan, but if you want to ~conform to DD recommended speaker placement WRT the THX recommended viewing distance, then a 106" screen width requires ~163" (13.6 ft), which dictates the L/R speakers be ~188" (15.66 ft) apart. :frowning: Working backwards, with...
  20. Greg Monfort

    Brett's Home Theater

    Greets! Sure! Stewart, etc., will sell you just the material. WRT mounting speakers behind the screen, cinema screens have only ~5500 perforations/ft^2 that are large enough to pass the high SPLs required, ergo they are too large to be ~invisible (at least from the front row) and too few to...
  21. Greg Monfort

    Brett's Home Theater

    Greets! It's all about density when trying to isolate low frequencies, so it doesn't matter what the material is as long as there's enough to get the job done. Do a Google search for the hardware. Make your own screen, they're super easy to do and cost only a small fraction of a...
  22. Greg Monfort

    Brett's Home Theater

    Greets! Sorry, 'FOH' is prosound speak for 'front of house', i.e. stage PA speaker stacks, cinema screen/LFE channel speakers. Tapered front (screen wall) to back, like an amphitheater, not top to bottom. 'Massive/sprung' as in a wall thickness with a density of at least 180 lbs/ft^3...
  23. Greg Monfort

    upgrading home theater suggestions

    Greets! 'Sounds' ;) like you need to step up to some decent pro studio monitors, and for ~$650 street price these can't be beat IMO: http://www.mackie.com/products/hr626/ so check out your local prosound emporiums for a demo and let us know what you think. GM
  24. Greg Monfort

    Brett's Home Theater

    Greets! Cinemas are basically designed back-to-front since screen size is dictated by how far away and how high the last sight line is. Assuming the standards/guidelines haven't changed since I researched this stuff, max viewing distance is 11 deg (~5.2 screen widths) before the average...
  25. Greg Monfort

    What makes a good HT speaker as apposed to a good Music speaker.

    Greets! Foolish?! Clearly, we disagree WRT to THX. One more time, 'HT' as originally envisioned isn't about pandering to folk's music listening preferences! Far from it, and getting back on topic, why using typical HI-FI speakers for HT and vice versa are for the most part mutually exclusive...
  26. Greg Monfort

    Some more sub questions...

    Greets! First things first, did you try damping the large cab's vent or completely sealing it off or attenuate the offending low end? If so, how did it perform? Seems to me that one of these options is the way to go based on your comments. That, or tuning it lower with dual PRs. WRT over...
  27. Greg Monfort

    What makes a good HT speaker as apposed to a good Music speaker.

    Greets, part deux! ;) The size, shape of the tweeter and its housing combined with a 4 kHz XO point (IIRC, short term memory is shot) makes it physically impossible with current technology to have any useful radial dispersion with a ~flat power response (less vertical than horizontal, IOW...
  28. Greg Monfort

    What makes a good HT speaker as apposed to a good Music speaker.

    Greets! 'Good results' probably only in personal opinion since typically no complete definitive HT 'rules' (be they THX/Dolby/DTS) are used to compare them against since few speaker systems would pass. This doesn't mean to imply that it sucked or anything else beyond the fact that it probably...
  29. Greg Monfort

    What makes a good HT speaker as apposed to a good Music speaker.

    Greets! Unfortunately I can't think of an easily understood example at the moment to explain it further other than to recommend that you study JBL's cinema design and Dolby's 5.1 production guidelines manuals. Between the two it should become transparent why HT and music speaker's 'speed'...
  30. Greg Monfort

    What makes a good HT speaker as apposed to a good Music speaker.

    Greets! Sounds like sarcasm to me. Actually, your layout will benefit from controlled directivity/~flat power response far more than one with major off-axis requirements since you ideally want the first reflections from the mains/CC to be behind the seating area and the surrounds at the...
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