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Pros: My house suffers from wildly varying voltages, usually high going to 130-135V. Of course the electricians and the local power company say nothing is wrong. I'd been trying UPS after UPS but none of the low-end models do true voltage correction, so they constantly trip around 130V to battery, and my equipment would die a few minutes later, even though I still had power.
I emailed APC looking for a solution and they recommended this. For $50, this unit has /solved/ this problem. Before I would have uptimes of a few hours, now the box I have plugged into this has been up since I installed it. Whenever the voltage sags low or surges high, this device does make a little 'click' as it shifts to regulation mode, but that's the only noise (no hums, etc.). It also seems to be well-shielded - it is also protecting my entertainment system and I get no buzzing or hums on the audio regardless of how it is working.
Cons: No real cons that I can think of. Someone earlier mentioned it was heavy, and it is beefy, but that's exactly what I want in a device like this.
Overall Review: I'm writing this review as I'm ordering an additional one for some other equipment, and we've actually used a couple of these where I work now for dealing with some horrible power problems there. Do keep in mind this is /NOT/ a UPS - it will only help so far and then cut off completely (to protect the load) - you need a UPS /BEHIND/ this device for maximum uptimes. (So, outlet -> this -> UPS -> devices).
Pros: Does an amazing job of evening out the incoming voltage for the price.
Cons: Makes a fairly loud clicking noise when it switches between internal capacitors and line voltage, but I don't mind at all. This helped me to realize when there is a voltage event occurring and has helped me track down wiring problems in the house.
Overall Review: I'm a computer enthusiast, online gamer, AND a licensed electrician. This little thing is absolutely awesome in what it does for the price. You shouldn't even be considering a $20 surge protector for your new gaming system when you could have this instead. A surge protector will catch hard spikes, but this unit maintains line voltage within a very tight tolerance filtering out HIGHS AND LOWS (brownouts), the dips are just as deadly to your PSU and absolute poison to overclockers as there is no way to maintain rock steady rail voltage when your incoming voltage just dipped 10%. Unlike a UPS this unit will only bridge you through short events, if you work with critical data you need a UPS but otherwise this is incredible protection for the money. I can't recommend it highly enough.
Pros: Does exactly what I need it to...with 3 upstairs bedrooms on one circuit with 3 window air conditioners, naturally there would be MANY voltage drops. I feel more comfortable now with all of my equipment behind this.
Cons: The clicking! Now I'm no electrical engineer, but does it HAVE to click so loud when changing between undervoltage protection and normal output? I bought this for use in a home studio and it will definitely need to be relocated since it occurs so often.
Overall Review: The click itself is not all that annoying if youre just sitting there, but I just know its gonna show up on just about any microphone that i put in the room. Perhaps a voltage regulator designed for audio use would not click so much...but seeing as they cost more than ten times as much, I'll stick with this.
Pros: Excellent power factor correction. Stabilizes the voltage extremely well in my apartment (tested it with an oscilloscope borrowed from the university I attend).
Cons: Very heavy and kind of large!
Overall Review: I have designed a voltage and current regulator in an electrical engineering class I took. This thing is way better than I could build at present XP
Pros: I live in one of those houses with bad power, from the grid not because of faulty ground. The power usually comes about 10 volts over standard 110v. Because of this I loose countless lightbulbs and 4 hard drives. For some reason the rest of the system seems to do okay. Since I've bought this units It's been stable. I hear it clicking here and again so I know it's working. I thank the Lord for this unit. For 50 Bucks how can u go wrong. I lost 3 Hard drives just because I didn't have this earlier.
Cons: It doesn't have a battery built in thought that would have added to the weight. Shipping is pricey but this thing weighs a bit.
Overall Review: I strongly advise you to test your ground and makes sure it isn't your ground that's not working. Improper ground can really screw up your system. I'm pretty sure all the controller boards on my HDs are to blame. Thank Good for warranties.
Pros: Keeps voltage going to equipment within a safe range.
Works. Regulated voltage down at my apartment.
Sturdy case, thick cord - and outlets on back spaced for wall-wort style power adapters.
Cons: Audible click if it switches voltage range (to me- not a big deal at all).
Overall Review: This is NOT a battery backup- it changes the incoming voltage to a safe range for your equipment. It is a very inexpensive (compared to the cost of a full tower) investment for peace of mind. I am much happier knowing that my gear is protected.
Keep in mind- this thing will support 1200w of connected equipment. There is another version at newegg that will do 600- so get the one rated for your application.
Pros: This is the best thing that you never knew you needed. Ever since I got this thing I hear it trip about 3 times per day. Usually while other large appliances are running. I never realized that my voltage was drop so much and so frequently. I am really pleased I bought this and they are so cheap. Just paying a little bit more gets you something so much nicer then a surge bar
Cons: It does have a noisy click when it trips. If you have it on a home theater it is not louder then your tv or movies. However I like the trip noise. It lets me know it is doing it's job so it isn't a con for me.
Pros: Performs exactly to specs. Inexpensive for what it does.
Cons: None worth mentioning.
Overall Review: If your laser printer fuser units fail a lot, it's probably because of line spikes and drops. This unit will save your laser printer. Much cheaper than a new fuser.