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Thread: Onkyo TX-NR 646 clipping?

  1. #11
    Join Date
    Apr 2020
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    100

    Default Re: Onkyo TX-NR 646 clipping?

    Quote Originally Posted by Pogre View Post
    I wouldn't use this as the gold standard, and keep in mind it assumes 8 ohm speakers (I subtract 3 dB sensitivity for 4 ohm speakers), but it can give you a rough idea of the power required to hit desired spl at your seat. Just fill in the boxes and click calculate.

    http://myhometheater.homestead.com/splcalculator.html
    i cant upload a pic again?

    inputs:
    92db tower sensitivity
    100 WPC
    2 channel 2-4ft from wall + 106.7 ??? fine with me if that is true?

    i screen shot my phone app SPL meter and Never get over 80db BUT it really is pretty loud and clean. I am certain i can hear if i am over driving them and it seems just fine?

    calculating 106.7 and reading 80 is way off

  2. #12
    Join Date
    Apr 2020
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    Default Re: Onkyo TX-NR 646 clipping?

    Agreed, plenty loud w/ good clean power. Although, I think audiohead was saying 80 db was loud enough for him... (well, it it's too loud, you're too old... JK). I, too, tend to listen at more sane volumes now-a-days unlike my youth...

    ill pull this over here. lol, not too loud but do feel old lol

    to clarify the 80db is the reading on my phone SPL meter! cant be near accurate with calculated at 106.7db.

    when i stand in my listening position i am believing the 106!

  3. #13
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    Apr 2020
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    100

    Default Re: Onkyo TX-NR 646 clipping?

    i just thought of one more thing, My Rythmic LV12F is on and adding another 300W into the sound!

    don't make sense to me?

  4. #14
    Join Date
    May 2015
    Location
    Houston, Texas
    Posts
    1,443

    Default Re: Onkyo TX-NR 646 clipping?

    where are you crossing the mains to sub at, 80 HZ? that takes alot of work off the main speakers in to produce bass, which should help your amp drive the mains.

    Does your AVR have a test tone? If so, play that and check what your phone SPL measures... it should be around 75 db more or less. If far off, tells you how accurate that mic is.

    If you have a USB mic, you can always download REW (free) -- it has a built in SPL meter that works really well.

  5. #15
    Join Date
    Apr 2020
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    100

    Default Re: Onkyo TX-NR 646 clipping?

    Quote Originally Posted by racrawford65 View Post
    where are you crossing the mains to sub at, 80 HZ? that takes alot of work off the main speakers in to produce bass, which should help your amp drive the mains.

    Does your AVR have a test tone? If so, play that and check what your phone SPL measures... it should be around 75 db more or less. If far off, tells you how accurate that mic is.

    If you have a USB mic, you can always download REW (free) -- it has a built in SPL meter that works really well.
    80HZ crossover, yes

    ah, yes on the test tone set up, i will do that! and look for 75DB thank you

    no usb mike i don't think but an earphone plug mic, i do will that do?

    i need a day or 2 as i am giving my buddy some help at the farm , on way soon

  6. #16
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    May 2015
    Location
    Houston, Texas
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    Default Re: Onkyo TX-NR 646 clipping?

    I'm not sure if an earphone plug mic will work with REW. I guess you can always try.

    If your AVR has room correction, the mic it came with may work as assuming it would be USB.

    You could always pick up a UMIK-1 from Amazon or other source. Not that expensive (around 100) but is a good tool to have.

  7. #17
    Join Date
    Apr 2020
    Posts
    100

    Default Re: Onkyo TX-NR 646 clipping?

    AVR mic is the one with the earphone end

  8. #18
    Join Date
    Aug 2003
    Location
    USA
    Posts
    5,593

    Default Re: Onkyo TX-NR 646 clipping?

    Quote Originally Posted by audiohead View Post
    i cant upload a pic again?

    inputs:
    92db tower sensitivity
    100 WPC
    2 channel 2-4ft from wall + 106.7 ??? fine with me if that is true?

    i screen shot my phone app SPL meter and Never get over 80db BUT it really is pretty loud and clean. I am certain i can hear if i am over driving them and it seems just fine?

    calculating 106.7 and reading 80 is way off
    Phone SPL apps are not accurate.
    .
    .
    .
    Good Sound To You!

    David Fabrikant
    www.ascendacoustics.com

  9. #19
    Join Date
    Apr 2020
    Posts
    388

    Default Re: Onkyo TX-NR 646 clipping?

    Quote Originally Posted by audiohead View Post
    ill pull this over here. lol, not too loud but do feel old lol

    to clarify the 80db is the reading on my phone SPL meter! cant be near accurate with calculated at 106.7db.

    when i stand in my listening position i am believing the 106!
    I feel partly responsible for the spl conversation...

    If you're turning it up that loud you might be right at the hairy edge of clipping and a dynamic peak could cause you some problems. You don't always hear clipping when it happens either. Be careful man. I'd hate to see a new thread lamenting the loss of a tweeter!

  10. #20
    Join Date
    Apr 2020
    Posts
    100

    Default Re: Onkyo TX-NR 646 clipping?

    bumped the max volume to 62 from 65...i still felt safe at 65 but HEY?

    hense the q?

    i always loved Onkyo power , am i missing something?

    dont worry , you wont hurt my feelings lol!

    it does dang near 2x its pwr into 4 ohm

    i dont feel it is under rated?
    Last edited by audiohead; 08-04-2020 at 05:40 PM.

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