Originally posted by: Lore
Look here
AmdInside: Do you have any of those problems?
In summary: hissing, clicks and pops, etc.
"As one of the early adopters for this product, I and other end-users noticed a lot of things that the reviewers either didn't notice or didn't have in their test units. I know the Logitech Z-680 is a popular product that a lot of people are looking forwards to, but do be aware of these issues.
The biggest problem is the hissing that comes through the speakers in any input mode, even if there is nothing connected. You can even have it on mute and the speakers will still hiss. You can actually hear the hiss even when you're about 3 feet away (So with the speakers on your desk, you should be able to hear the hissing). This hissing can be heard through music played back at low volume and can overwhelm classical pieces at low volume. Quite annoying. The hissing is unaffected by how high or lwo the volume control is set."
I can faintly hear the hissing sound when the volume is set half way. When no sound is coming from my computer, the hissing only gets annoying to me when the volume is 3/4 high. I don't get any hiss when the volume is set to mute.
"The second problem is the clicks and pops that you get when you're switching modes between the different inputs. Whether you're in digital or analog mode doesn't matter as the decoder tries to figure out what sort of stream you're feeding it and will in turn click and pop as it's switching modes. When you switch modes, you can actually hear the hissing get louder for a second as the decoder gets ready for the new stream.
The clicks and pops are especially bad when you are watching a DVD and the menus keep cycling; the clicks and pops occur everytime the audio stream (whether it's DD5.1 or ProLogic II or simply Stereo) refreshes. So if you're watching a bonus feature DVD and are navigating the menus to get to the deleted scenes (for example) it will click and pop loudly everytime you hit "enter" and navigate one level deeper (or up)."
So far, this hasn't bothered me. I have to do more testing though. It would probably bother me after a while since I have to do a lot of navigating during testing.
"Lastly, the volume control knob is digital and senses your turns; sometimes this is very inaccurate, allowing your speakers to jump up in volume even when you're trying to turn it down. It's never consistent how many notches each turn will bring down the volume. Sometimes you can hear soft clicks and pops as the volume is adjusted."
No problems with volume. I don't hear any clicks or pops when lowering or raising the volume.
"Exchanging these for another set doesn't matter. The other two people I've talked to are both on the East coast and they have the same problems as me. One guy exchanged his three times at two different stores, I exchanged mine twice (at two different stores), and one other guy is still hanging on to his pending a solution from Logitech."
Oh well. Its the only one I've purchased. I still like it enough to where I might buy it for my home PC. But it will have to be after Christmas. Hopefully, I can find a good deal by then.