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  1. Trying to Fix Center+Sub FR

    Home Audio Acoustics
    My center channel sits on the top shelf of an A/V rack beneath my display about 2.5 feet from the front wall. Running full system sweeps per pg.100 of the REW Step by Step Guide, I generated the graphs below for the center only, and for center+sub. There's a large dip centered around 100Hz...
  2. Have You Heard "Feedback" During FR Measurements

    REW Forum
    I was making some FR measurements with a loopback timing reference and heard something strange: a second test tone started as the full 15Hz to 25kHzsweep reached about 1-2kHz. This second sweep began at around 500Hz but was time-delayed relative to the first sweep. Both sweeps played from...
  3. FR Import Issue

    REW Forum
    Hi folks, I'm trying to import a frequency response file into REW, but I am having some issues. The file imports successfully, but REW graphs values that aren't in the file and larger than the max value in the file. I'm a bit confused by this. Any thoughts as to why this may be occurring...
  4. Unable to measure FL+FR+subs after timing reference update

    REW Forum
    I currently have the latest beta of REW, but ever since the timing reference update, I can't measure 2 channels at once (via HDMI and ASIO). I have not selected use timing reference under preferences and when I select channel 1 and 2 for FL+FR+subs, I get output just from channel 1. The next...
  5. Higher Speaker Impedance ;- Flatter power amp FR?

    Home Theater Receivers | Processors | Amps
    Hello all, I have an rmx1850hd amp and was surprised when using it to replace an old low wattage trio integrated amp that my subs did not appear to dig that low anymore but now seemed to have a stronger midbass emphasis. Although it occurred to me that this would be because I had the bass...
  6. DIY speaker project - Impedance and FR measurements, advice on hardware and process?

    REW Forum
    Hi all I would like to design and build a 2 way system based on some speakers I have obtained with no available data. I have only commenced reading on the topic however I understand I will need to obtain impedance measurements of Thiele and Small parameters to design an enclosure, then measure...
  7. Changing # of sweeps radically changes my FR and IR changed with new mic

    REW Forum
    I noticed that when I go to measure, the more sweeps I have REW run the crazier my FR curve gets. I was under the impression that running more sweeps basically just gives you an average of the readings so that if there is some kind of noise during one of the sweeps it won't affect the final...
  8. How does this FR look to you ?

    REW Forum
    How does this FR look to you ?/ Need Advice (UPDATED) Hi I messured a small room with a dbx m2 mesurment mic into audio card Focusrite saffire pro 40 with Yamaha HS 80 Monitoring this room is to be used for Mixing Audio Is this considered good response in general ? what sort of acoustic...
  9. Puzzled about sub hookup fr 2-ch and HT

    Home Audio Subwoofers
    Hi Guys I have a Denon 4311CI and 2xMirage Omnisat Floor standers and 6 satellites and a center for my 9.1 I use the prestige S10 for a sub, but am planning to change to (probably) SVS in the coming months (thinking of the SB13-Ultra or 2x. I don't have the tight bass that you actually feel...
  10. Measuring tape deck FR with REW?

    REW Forum
    Hello! Do you think it's possible to measure the FR of a connected 3-heads analog tape deck with REW? The returning audio would have a slight delay, is REW able to cope with this delay and present valid results? Thanks!
  11. Room component of low FR

    Home Audio Acoustics
    Can anyone tell me how I would measure how much the room itself is adding to the low frequency of the sub? Would doing a near field measurement and comparing it to the FR at the seating position give me an idea of the difference or does the sub have to outside and away from any reflections to...
  12. short sweeps vs long, accuracy of FR

    REW Forum
    I have been tinkering with REW again, and came across something a bit weird, I think. Looking at this graph: The green curve is a 1M sweep (4 sweeps) The purple curve is a 128k sweep. To my eyes the purple is more accurate, with deeper valleys. The green one SHOULD be more accurate, as...
  13. David Gilmour, Voice And Guitar Of Pink Floyd, Makes Digital Debut On V CAST Music Fr

    CD-BD-DVD Music | Vinyl Records
    http://www.hometheatershack.com/images/davidgilmourverizon.jpgFree Special Performance Versions Include “Shine On You Crazy Diamond,” “Wish You Were Here” and “Comfortably Numb”. BASKING RIDGE, NJ — Verizon Wireless scored another first today as the company’s V CAST Music service becomes the...
  14. Art CleanBox II FR

    Electronic Processing/Equalization Devices
    EDIT I re-did the measurements, and found them to be quite flat. See this post http://www.hometheatershack.com/forums/bfd-forum/6228-art-cleanbox-ii-fr.html#post49929 Thanks Jim Hello all, been too long. I've seen the Cleanbox threads, but I haven't seen anything for the CleanBox II, ao I...
  15. Whats the in room FR of the Pb12+, PC20-39?

    Hi guys, Will most probably buy 2 of these (either Pb12 or PC 20-39) in for my 2000 rect. room. Would be happy to see some REW curves before equalization in your rooms, also specify shape of room an volume. Thanks for helping! Blaser
  16. Desirability of flat FR in speaker design???

    Home Audio Speakers
    hi everybody, on another forum a discussion has started on 'accuracy vs personal taste'. It came about because I disagreed with someones statement that 'it's how it sounds to you that matters', I only really disagreed to the degree that a statement like that opens the door for scoundrels and...
  17. Using REW Waterfall to calibrate sub instead of FR graph

    REW Forum
    I was wondering if anyone actually tried to calibrate their sub using he waterfall decay instead of FR graph? What I meant was that looking at the waterfall, there are usually certain freq where the decay is much longer then the rest. And subjectively these decay seems to hang on in your room...