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  1. Sweep length versus IR Phase

    REW Forum
    I am using a USB calibrated UMIK-1, a USB DAC and REW 5.20 Beta 12. I noticed that the IR plots phase inverts as the sweep length changes between 128K and 1M. Is this normal behavior ? If so, why would the polarity change based on the sweep length ? :huh: TIA
  2. Extending a Projector Ceiling Mount Length

    Home Theater Projectors
    I just got a working Optoma HD70 projector from a thrift store for $24 and it came with a ceiling mount. I would like to use the mount on my ceiling, but there is a ceiling fan in the middle of the room, so I would need to drop down the projector mount a good extra 6-12 inches. My question is...
  3. different measurement results with, length 1M, 512K etc..?

    REW Forum
    Something I don't quite understand is why I'm getting such significantly different measurment result with the different sweep length, I expected these to be similair. I thought it might have had something to do with the impulse time due to room accoustics, so I shortend this but with little...
  4. Need help with port length / size based on my enclosure

    Ported Subwoofer Build Projects
    I will soon be embarking on my first sub build, and plan to put the enclosure inside a current wall void. The internal box dimensions that I came up with are as follows; 1.16' wide x 3.256' tall x 2.08' deep. This nets 7.9 cu ft for a Dayton rs5390hf. Don't worry about room between studs. I will...
  5. HDMI - over CAT5E needed for what length

    System Setup and Connection
    I am setting up my projector and will be running an HDMI cord but would like some help determining if I should use a "signal extender". The run will be approximately 30'-35'. Has anyone ever used an HDMI signal for this long a run from AV Receiver to HDTV? In my current home...
  6. Need Help with Narrow 7 1/2ft Wide by 15 ft Length Room.

    System Setup and Connection
    Hello all, I am so glad I found this website - everyone here seems to be very knowledgeable, certainly more than myself regarding home theaters. I have always wanted a Home Theater and now have the opportunity to create one in a detached room that is limited in space - it's 7 1/2 ft wide and 14...
  7. Bass Boom - change port length?

    REW Forum
    I have just built some bass reflex cabinets for a pair of Tannoy Monitor Gold HPD 315s. They are loosely based on designs discussed on the Hilberlink Tannoy, and are roughly 150 litres in volume with 2 100mm diameter, 100mm long ports. (As apparently recommended by Alex Garner of Tannoy) I am...
  8. Microphone cables? Which one and what length?

    SPL Meters | Mic's | Calibration | Sound Cards
    I have ordered my mic and will need a XLR m/f microphone cable. Which brand and what length is best. I have a local guitar center. Their cables range from really cheap to top dollar. Just dont know what to buy. Thank you for you help.:help:
  9. HDMI cable length?

    HDTV | Video Displays | Processors
    I just got me LG 55" hung on the wall. It's LED. Looks nice. Was wondering how far I can go with HDMI cable, because I wanna bring it to my sofa when I want to connect laptop? Also, some people say that the quality of HDMI is important. Is that true, because it's a digital cable. It passes...
  10. Port length and air speed?

    Ported Subwoofer Build Projects
    Hello, I also have a Dayton Titanic 15" sub and a O audio 500 watt amp. When i put the data into WinIsd it gives a port length of 4 inches, is this right? I used the data from a link on this website. 12^3" with a 19hz tune. I will build a 24x24x36 box. On a side note: do any ported...
  11. Port length confirmation ??

    DIY Subwoofers - General Discussion
    I will have a Dayton RSS315 HO-44 in 3.6 cuft net ,4" port and tuned to 18hz ...is 26.11" Port length correct ? Thanks!
  12. Port flares influence length??

    DIY Subwoofers - General Discussion
    I will have a 4" port of 26". Will having 1" Radius flares on both ends, influence the length for the calculated tune ??
  13. Speaker Wire Length

    Remotes | Cables | Accessories | Tweaks
    Hello All- I'm adding surrounds to my 7.2 system and since the wires for the speakers will all run up one wall, and then branch out to get to the other side of the room, the wire on the right side will need to be about 20 feet longer then the wire on the left side needs to be. I've read...
  14. Interconnect cable length vs. sub speaker cable length

    Remotes | Cables | Accessories | Tweaks
    Hi all, I am going to try to solder RCA male to XLR interconnect cables using the Rean / Neutrik NYS 373 and the Neutrik NC3MXX connectors with low profile Canare L-2E5 cables. Is it better to build longer interconnect cables and shorter sub speaker wires or is it the other way around? Also...
  15. Different Lengths result in wild shifts - how do I know which Length is right for me?

    REW Forum
    If I use a length of 128, my graphs look reallllllly nice and impressive (to me anyway). The higher up I go in length, the worse they look. At 512k, I get a complete null drop at every 50: 50hz, 150hz, 250hz (see attached). I'm thinking that my PC must only be able to handle the 128 Length...
  16. help with modeling/port length

    Creative Sound Solutions
    so i have a sdx-15 and will be doing an end table build. i had originally planned on doing a sealed box due to the simplicity, my size requirements, and my living environment, but have since decided to go ported for several reasons. i will be reusing a relatively weak plate amp (dayton 240)...
  17. USB Cable Length

    Remotes | Cables | Accessories | Tweaks
    Me again! I'm planning to run a USB cable from my control room to an outlet in my media room. The (perhaps embarrasing) reason for this is to link my USB microphones back to my Wii in the control room. My concern is what I've read about the length limitations of USB. My plan is to run the...
  18. HT design & cable lengths

    Home Theater Design and Construction
    I’m in the process of designing my dedicated HT. I need to know what is the maximum length of HDMI cable, fiber-optic cable, and RCA cable that I can use?
  19. Why does port length increase when two ports replace one?

    DIY Subwoofers - General Discussion
    As per title, Just wondering why two ports are required to be longer than a single port? For instance if I tune a cab with a single 10" port, but the port velocity is too high and I add another port, these ports are then required to be 22.5" long each?
  20. Speaker wire length

    Remotes | Cables | Accessories | Tweaks
    Hello, I did a search and didn't quite find this question so here goes. I purchased 100ft of 14ga speaker wire (monoprice). My current speaker placement would be in a 12x10 area (the room is actually 12x20 including dining room). Should I... A) cut only the minimum I would need for speaker...