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Accidentally played distorted wavefile on Marantz SR5300 and Xitel Pro Hi Fi Link

Discussion in 'General Electronics' started by Michael Williams, Feb 10, 2004.

  1. I have a Marantz SR5300 receiver and I have a Xitel Digital Pro Hi Fi
    Link connected between it (via a digital coaxial input) and my PC's
    USB port. I've had it set up for about a month and it's great (sound
    quality and all) and I usually use it to play MP3 files via WinAMP.
    But this afternoon, I had set up a MP3 playlist for the computer to
    play as I was doing household chores. I went down to do some laundry
    and I came back and I heard some awful distorted sound coming out of
    the speakers. It turns out that the software program (WinAMP) had
    been trying to play a corrupt MP3 file and all sorts of distorted
    sounds were coming out of the speakers (connected to the Marantz
    system) . Fortunately the volume level wasn't high (it was at about
    -25 dB or so) so I don't think that the speakers would have gotten
    damaged. But my question is that, as this sound file may have been
    playing for ~10 minutes (ie. constantly playing distorted clicks and
    beeps for this time period), is it possible for this playback to have
    damaged either the receiver (either the amplifier or the internal
    24-bit/96 kHz DAC) or my USB Xitel Sound adapter (although I think
    it's unlikely for it to have damaged the sound adapter since all it
    does is relay the digital input signal to the Marantz receiver)???
    The reason I'm asking is because now, if I put my ear next to the
    speaker, I can hear a little hum (even in digital audio mode), even
    when ther'es no sound playing, and I'm not sure if I had this
    phenomenon before with this sytem.

    Any help or suggestions would be greatly appreciated.
     
  2. Codifus

    Codifus Guest

    The hum probably was there before and now, understandibly, you are a
    little paranoid. The weakest link in your system would be the tweeters
    in your speakers. They'd be the first to go. Actually, I blew a tweeter
    in my system doing something like what you did. I had winamp playing wav
    files and one of the files was still in 88.2/32. Since Winamp 2 only
    plays 44.1/16 files, a whole bunch of garbage spewed out of the speakers
    for several minutes. Soon after, one tweeter died. Interestingly, inside
    all that garbage noise, you could actually hear the music in that file.
    It was faint and totally overblown by all the distortion, but it was there.
    On a slightly different note, but still related, a friend of mine, who
    also uses Winamp, uses his EQ extensively, and EQs in software have much
    more capability that the traditional EQs. He did his usual V pattern he
    likes, but since it was software, the boost levels at the extremes were
    very high. Instead of 6 to 10 db boost at 60 Hz, he was subjecting his
    amp to 20 db of boosted bass and treble. I told him he was going to kill
    his amp. He argued that it's 100 watts. I countered and told him it was
    the input side of that amp that would blow. A week later, it did. SO
    these 2 experiences, and a few others tell me that internal components
    are more robust and able to handle overloads better than the high power
    components on the ouside, such as the power stage of the amplifier and
    the speakers. Most amps have a self protection mechanism that keeps
    shuts them down to keep them from burning themsleves out, so the
    speakers would be the next weakest link.

    CD
     
  3. Ian Molton

    Ian Molton Guest

    If he had his amp connected to his line out or via spdif theres no way
    he could have done that.
     
  4. Arny Krueger

    Arny Krueger Guest

    There's no way that playing some nasty-sounding stuff at a relatively low
    level could damage *anything*. I agree with the suggestion that the
    low-level hum you hear was there all along. Just about *every* piece of
    audio gear that is somehow connected to the power line will put out a tiny
    humming sound if you turn it up and put your ear next to the speaker. If
    there was damage due to overload, it would most likely take some other form,
    such as clearly audible distortion or big changes in the tone quality of the
    music.
     
  5. Codifus

    Codifus Guest

    He was using his line out from the soundcard to the amp. SPDIF was not
    an option. It's quite easily possible. If you look at a Winamp EQ, the
    boost settings are quite large, and if you un-check the auto checkbox,
    which he did, the signals get boosted without any max output level
    correction by software, then the input stages of an amplifier will be
    hurting.

    CD
     
  6. Ian Molton

    Ian Molton Guest

    No, they wont.

    no matter HOW much 'eq' he put on the winamp soft eq, the line output will not have (if it really was a line out) put out more than about 1V p-t-p.

    some old equiment used 0.5V p-t-p but modern stuff is generally 1V p-t-p.

    if he got winamp to produce some really high ouput LF square wave output its a possibility that if his amp was turn up a bit much he could have damaged his tweeters. but its not very likely, as you said - it wasnt loud.
     
  7. Jodster

    Jodster Guest

    . or as smoke ;-)

    Jodster
     
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