Audio Systems: sratchy noise yamaha speakers, home theater speakers, microphone mixer


Question
Hi,
I have a pair of Yamaha NS-A2836 speakers, about 4ft tall and 10inch wide. I have a Karaoke System that uses those two speakers.
The problem is that whenever the vocal gets loud, a really LOUD scratchy noise comes out of the two speakers. It's not the feedback-screeching noise. It sounds more like the sound of paper being torn. This happens more often when effects or treble is increased.
Any suggestion would be greatly appreciated.

Thanks!
Khanh Bui


Answer
-----FOLLOW-UP---------
Kahn,

 Based on your feedback I would definately look into new speakers.  Im on vacation right now (and took myself off the board for questions), but if you want to followup with a new question next Wednesday, November 29th, and make sure to select that it be "private", I would be happy to discuss some options for you.





Hi Khanh,

  What you are hearing is distortion.  

 This could come from several sources in your system, not just your speakers.  For instance, if you have a microphone mixer and the "gain fader" is set too high, then you will overloard the mixer and it will "clip".  If this is the case then you need to back the level off everything.  This may mean that the sound is not as loud as you like, but it may prevent anymore overloading.

  I am troubled by your choice of speakers for karaoke.

  Most likely you are overloading your speakers and damaging them - what sounds like paper ripping can lead to speakers ripping.  One day soon your speakers will sound like that at any volume and you will have to replace them.

  Home audo speakers are not designed for the power and dynamic range required for "live performance" music, like your vocals.  This is one of the many reasons bands play through "professional PA Speakers" and not through a bunch of home theater speakers - even ones as nice as your Yamaha NS-A2836's.

  Before you damage your speakers, I recommend that you purchase something more suited for live performance, such as might be sold at a music store.  You should only look at speakers that have a "compression driver/horn" for high frequencies.

  I am happy to make more specific speaker recommendations if you can tell me what country you live in and what you'd be willing to pay (or what type of room you're trying to fill with sound).  I'm guessing you play the music fairly loud to get the speakers to distort so badly.

Here are a few examples of "Pro PA" speakers:
http://www.jblpro.com/JRX/JRX112.htm
http://www.fbt.it/Inglese/pae/speaker/Jolly/index.asp

I wish you luck!