Thank you for being a valued part of the CNET community. As of December 1, 2020, the forums are in read-only format. In early 2021, CNET Forums will no longer be available. We are grateful for the participation and advice you have provided to one another over the years.

Thanks,

CNET Support

General discussion

Random thoughts on battery back up.. ..

May 31, 2008 2:51AM PDT

Out of an abundance of boredom, I did some experimenting today on picture and sound quality with my power console. My conclusion is that it barely improves my picure but more dramatically improves my sound. I've been using it for a couple of months and didn't notice any difference at first but, I was wrong. Lately, I've thought that on my standard def stations, the contrast looked a little better and the sound, a lot better. I was thinking that Time Warner must have done something to improve my picture and sound but it's actually my power supply. For standard def, I use Neo 6 Cinema, mainly because Josten said so, but was never really satisfied with the matrixing of either it or Dolby Pro Logic Movie. Just wasn't getting much of an effect from my rears so it still sounded a lot like plain ole 2 channel. Lately, my rears have really kicked in and it sounds much closer to actual surround sound. That's where I see the big improvement. I think my receiver just sends a stronger signal to my rears with the power supply and it makes a big difference. I don't notice any big improvement to the picture or Dolby Digital EX on the high def stations

I bought the exact UPS I said I wouldn't buy because of poor tech support, a Belkin AP30800fc10. Before I bought, I had questions that they should have been able to answer but couldn't. Didn't know what a UPS was much less a sine wave. I did it for the usual reason of course, beacuse I'm cheap. When I was trying to make up my mind, Fry's had them for 99.99 after 50.00 mail in rebates. Bought one for my TV and one for my computer. Two months later, I still haven't gotten my rebates. The rebate company they used initially denied both claims because they said the bar codes off of the box were invalid. After offering to fax the copies of the bar codes I cut off the box and send them, they agreed to put the rebates through and I guess I'll get them someday. Between that and the customer tech support guy who only spoke so so English and didn't know any more about a UPS than he could read from his answer book, I really hate this company. It's a high, high price I pay for being cheap but the UPS is definately worth 100.00. My power has gone off twice during electrical storms since I bought them and they worked perfectly as battery back-ups. Because the UPS's I bought only have AVR but no more serious line conditioning, I don't know if I could improve my waves with a more expensive unit. I get bad static on AM radio stations when my computer is on. These UPS's did not solve that problem. With better line conditioning, who knows?

Rusty

Discussion is locked

- Collapse -
ups and power conditioning
May 31, 2008 3:21AM PDT

A ups is great for keeping things turned on during a power failure so that you can shut them off properly in a correct order and such. Also if you have a projector or tv with a lamp that needs to shut down properly and have time for cool down they work great. A power conditioner cleans the power from the wall or the ups to give you less noise in the system. On the good brands you notice less background noise in the audio which gives you more detail and greater dynamics. In the video portion you will see better blacks, less mosquito noise, better contrast, better color, overall a better picture. On a good brand of power conditioner they will always do surge protection which will also protect your phone line and coax line which a lot of power surges and lightning strikes will come down a coax line. Check out Furman and MIT, they are 2 of the best that I have found!

- Collapse -
I have written on this many times.
May 31, 2008 4:55AM PDT

4 years ago there was raging battle about on this subject.
I used my oscilloscope to scope the AC line, nice clean sine wave it was at that.
Then I plugged in an AC powered drill into the same outlet that I was scoping and turned it on will scoping the line. I still had my nice clean sing wave.

I agree with jasondtx about the battery backup if you have RP-HDTV with a lamp.I have 10 ups through out the house now.

I don't think that just adding a conditioner will make your surround speakers louder.
If you had trouble hearing them going thought the setup routine would be the thing to do. John

- Collapse -
Sure, that's all true...
May 31, 2008 6:42AM PDT

I remember your post from before about the drill. I have a rear projection television and the battery backup worked just fine. We all agree on that. I also believe you about the pure sine wave you got from your wall current. The question is, is that true of everyones current? That cannot be said with certainty. Today I watched the same DVR'd standard def recording after plugging in my cable box, receiver and TV into a standard surge protector and then rewatched the same scenes running the same three components through my UPS. I can say with certainty that, in my case, the surround speakers sound noticably better when the power goes through the UPS. I can also say that the picture looks slightly better as it appears to have slightly better contrast. I can't say for sure why it looks better but I'm speculating that my receiver is able to access a bit more power through the UPS than when it is only getting wall current through a surge protector. I think that to be true because my unit has automatic voltage regulation but does not have more sophisticated line conditioning. I am curious though, could your oscilloscope also tell you if the voltage remained at the same level if put under a heavier load than your drill? Also, would the sine wave change if the voltage dropped under a heavier load? Something just tells me that my results have to do with total available current and not dirty current.

Rusty

- Collapse -
You bring up an interesting point Rusty
May 31, 2008 7:40AM PDT

I type so damn much here, I sometimes forget what I said and what I didn't. But, perhaps the biggest proponent of UPS at another forum says that its not just surges and spikes, he says that low voltage is just as bad. He not only recorded classical music for radio, he also built 100k custom sound systems for orchestra halls, and also is a doctor who was also put in charge of his hospital's power. He thinks UPS is the only way. Of course, a lot of people think he's overboard now and then, but that shouldn't surprise. newayz...

ps regarding choice of Neo6, I just want to reiterate that this is for Onkyo, and come to think of it, at least just for the previous generation. Not sure on yours come to think of it.

j

- Collapse -
As a previous poster on this hot potato topic, I too
May 31, 2008 7:48AM PDT

remember his easy, clean looking sine wave on the oscilloscope & do not doubt it at all. I got flak back saying an improvement I thought I saw & heard was psychosomatic.

But I will stand by my simple observation that surge -protector not specifically labeled for A/V use probably will (did in my case) introduce visual mosquito noise on the screen. That was very obvious. Improvement in audio was a bit more subtle for me, but real.

I don't know about average current as delivered to us typical customers. My line conditioner does display that the voltage delivered does vary through the day. Less in time of stress, like maximum demand.

So, I'm no expert on dirty current except to say I clearly saw it myself & receive benefit from line conditioning.