loud buzzer, burning plastic
357552
It cooks eggs fine but the buzzer is obnoxiously loud and is terrorizing my workplace. It also now smells like burning less than a month after purchasing it.
586095
Works as expected.  Would be 5 stars, but the product is very loud.
3544799
Out of the box the a/c adaptor buzzes like a tattoo gun. Applying pressure to the adaptor silences it, but that shouldn't be necessary. Definitely a side-effect of cheap manufacturing. The adaptor is made in China... Noise makes it unacceptable and my pets won't go near the thing because of the sound.

I've contacted costumer support to see if the adaptor can be replaced. I'll update this review when and if they get back to me. Several other reviews have mentioned this issue. Hopefully Pioneer takes these comments into consideration.
1141657
As with others who wrote about their burning experience, I've had the same thing happen.  Concentrator burns every time!  I, too, had an older model that worked perfectly and could use concentrator for at least three poppings.  Sadly, got rid of it when I bought the new one.  I noticed if you shake the base piece, something inside jiggles and makes a spring-like  noise.  This did not happen with the older model.  I wonder, was this a conversion to a Chinese manufacturer?
591021
The temperature readings are accurate but it makes a very loud beep. This is serious design flaw for something that's made to be placed so close to an animal's sensitive ear. It's really loud for people, my cat winced when we used it on her. It's basically unusable.
4830471
The AO Safety/3M Worktunes have been ok in every aspect but one. When the batteries run down it causes an earsplitting alarm. I complained to the company about the irony of a hearing protection device damaging my hearing with an unneeded alarm. Their reply was that there was nothing I could do the disarm the alarm and that is was not really loud enough to damage my hearing. Baloney! After two years they will not operate for five minutes before the alarm sounds. I do not reccomend this item.
4530668
Sounds like eagles screaming while it prints. It is cheap and prints fine, just really a really annoying, loud sound.
1163779
I ran this speaker through a Crown XLS 2000 amplifier in bridged mode.  For those of you who know the amp, it has a meter to show you when clipping and thermal compression are occurring.

I warmed this speaker up for about 40 hours, running pink noise at an average volume.  After that, I used it 3 times for about 4 hours each time of fairly loud (nothing obscene) music, mostly hip hop and dance music.  All three times I had an issue, and none of the times did I ever reach the "CLIP" LED on my Crown amplifier (barely touched the -10 Db).  In addition, even through a nice amplifier and a decent mixer, the sound quality sucked.  The speaker is tinny and the bass is lacking (unless you make it sound good enough to bust the speaker - just keep reading).

The first time, I got an awful smell of burning plastic about 2 hours into the session.  I promptly cut the speaker off for about 30 minutes, and turned it back on for another 1.5-2 hours.  No issues until the end of the session.

The second time, the speaker cut out on its own about 45 minutes into the playtime, and it started to smell like burning plastic again.  Lower volume than first session because I was nervous about this exact thing happening.  I let it cool for about 45 minutes this time, and turned it on for another 1.5 hours with no issues.

The third time, about 3 hours in, I was not there watching it.  A friend told me the room began to smell like burnt plastic, but he wasn't sure where the smell was coming from.  Soon after that, he says, the bass on the speaker cut out.

What my friend didn't realize is the voice coil in the subwoofer melted.  I took it upon myself to disassemble the speaker and find the root of the problem, which turned out to be a cheaply-made, thin plastic and cardboard-based voice coil, as shown in the included picture.  I don't know how DS18 could possibly advertise this speaker as rated at 2000W peak with such shoddy construction.

AVOID this speaker and save yourself the cost of another speaker when you, inevitably, need to find a replacement.
1147759
Immediately got hot enough to fry an egg and smelled of burning plastic. DO NOT BUY!!!!
4035474
Loved the way it cooks. Main problem I faced is buzzer. If sounds continuously the mosquito repellant sound!
3480035
It make a high pitch screetch sound when you manually lock it from the plastic pieces rubbing together! Really? Had to spray it with silicone spray which only helped for a day and it started doing it again.
2677078
We just put this up yesterday and thought it was really awesome in size and that the head turns. However, we woke to loud noises coming from the yard this morning to disclover that the blower was the culprit. We have bought dozens of inflatables for all holidays and not had this problem prior. Bummed because the place we bought it does not sell them any longer.
872720
This dimmer works;  however, it has a high pitched ring, sort of like tenitis, except others can hear it too. I thought it was my tenitis until my wife asked what the ringing was. I tracked it down to this dimmer. Shame, I would pay 3 times this amount if i was guarenteed not to hear the rining sound.
2914295
I've had this for about 4-5 months now. It provides very good sound and bass, and just enough HDMI connections for what I need.

But....after a few days I noticed a buzzing noise that I couldn't identify. After searching for a few minutes, I discovered it was coming from the receiver. It wasn't like a fly buzzing by your head, it was a bumblebee that just flew in your ear and was trying to find its way out the other side. The buzzing just gets louder and louder. I was able to stop it by pressing on the top of the receiver with some force, so I decided to stack some DVDs on it. The buzzing stopped...awesome. Easy fix, back to watching television. BzzzzzzzzzzZZZZZZZZ!!!! WTF?! The buzzing came back. I pressed on the top again, it went away. I let go, it came back. I put more DVDs on top, it went away. Hmmmm. I took them off, it came back. I eventually found that the buzzing comes about once person tv watching session and goes for about 2-3 minutes. What's that? Why don't I keep a weight on the receiver? That would be an easy fix, except due to the heat the receiver puts off, I'm afraid that having all those DVDs on top of the vents would reduce the heat transfer so much that it would burn up and stop working altogether. Trust me, it's not just warm. It feels like it could give you a first degree burn. In fact, when I took a DVD cover off one day, I found the plastic to be very malleable, as if it was about to start melting.

Overall, it will get you the sound you want, mine provided just a little more sound (aka buzzing), but it was cheap enough that I don't care so much anymore and it still impresses on movie night.
1784041
I can add my testimony to whomever said it made a constant and irritating ringing sound when connected to the speakers. huge bummer. hopefully I can send it back.
166512
I live in sacramento and got this because it gets 100+ degrees in the summer and i can't sleep without white noise anyways. Kill two birds with one stone! It's too loud. It's obnoxiously loud even on the lowest setting. I can't hear my tv, I can't sleep, and it's just...you can't tune it out. And this is from someone who has slept with fans/white noise his whole life. Works well on a hot day, but is obnoxious.
392747
This timer is really loud and heats up really hot. It also makes a very noticable spark overtime it clicks to turn on or off. I tried to return this product after only two days of use and they said I could not returned it. There are way better prices for timers like this one or even a more accurate digital one. I guess I am stuck with it and I will be buying a different one at Menards to replace this junk.