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nredman · Nov 15, 2003, 09:19 AM

have an eMac? crank up your volume in iTunes and your system..does your screen flicker? my does...could this indicate a possible problem in the future???

iXavier · Nov 15, 2003, 09:49 AM

Originally posted by nredman:
have an eMac? crank up your volume in iTunes and your system..does your screen flicker? my does...could this indicate a possible problem in the future???

Mine doesn't flicker, per se, but it seems to have these not-really-noticable horizontal lines on the right and left sides of the display. They're not really noticable, but I see them every so often--I just assumed it was because of the horribly low refresh rate at 1280x960.

x.

Luca Rescigno · Nov 15, 2003, 10:41 AM

It's a design flaw, more pronounced in some eMacs than others. The internal speakers cause the display to "flow," especially at high volume and high resolution (therefore, low refresh rate).

Which eMac do you have? Mine's a pretty new one, purchased in September. Also - the speaker cones, I learned yesterday, are made of PAPER. The grills were in place when I got the computer and yesterday I used a corkscrew to remove them, and sure enough, they're not metal, they're paper. I wonder if that has anything to do with it.

malvolio · Nov 15, 2003, 01:45 PM

The same thing used to happen on my "old-style" G3 iMac. On my new 1 GHz eMac, it has not happened (yet).

gto47 · Nov 16, 2003, 02:12 AM

This is not a design flaw per se. Any speakers that claim to be "sheilded" will have at least some magnetic leakage. The eMac speakers have quite a lot of power handling for their size (around 16 watts combined) which is more than most boomboxes and many mini systems are able to output through much larger speakers. Since the speakers are right next to the monitor it is very easy for it to be disturbed. It may be irritating but magnetic interference will generally not damage CRT monitors, so don't worry about doing damage to it. If you're cranking the volume i suggest you pick up a pair of seperate computer speakers or better yet hook it up to your home stereo. Luca Rescigno: The cones on the odyssey speakers are actually aluminum. No sheilding is done to the cones themselves. Speaker sheilding is traditionally done through two combined methods. First, a bucking magnet is used with a reverse polarity to the one on the speaker magnet which cancels out the polarity of both magnets. Then in order to seal out any excess polarity that may still exist a metal cap is applied on top of the two. Also... about this paper cone business... Anyone who knows audio will tell you that paper is as good as any other speaker cone material, and that its truly only the overall design that matters.

nredman · Nov 16, 2003, 01:55 PM

Originally posted by Luca Rescigno:
It's a design flaw, more pronounced in some eMacs than others. The internal speakers cause the display to "flow," especially at high volume and high resolution (therefore, low refresh rate).

Which eMac do you have? Mine's a pretty new one, purchased in September. Also - the speaker cones, I learned yesterday, are made of PAPER. The grills were in place when I got the computer and yesterday I used a corkscrew to remove them, and sure enough, they're not metal, they're paper. I wonder if that has anything to do with it.

1ghz - bought it this summer...i use 1280x960 for my resolution...i checked it on 1024x768 and it still flickers...i will just turn the volume down...maybe i won't be deaf at 50 then

iXavier · Nov 16, 2003, 10:08 PM

If you use external speakers, will the line shaking go away?

x.

gto47 · Nov 17, 2003, 07:41 PM

If you use external speakers, will the line shaking go away?

Yes, it should as the internal speakers are then no longer used. Most of the magnetic field a speaker produces is produced when it is being used and when the eMac's are not in use its fine. ...Put the external speakers too close to the computer however, especially the subwoofer and it may happen again.