Thursday, January 9, 2014

How many W RMS audio system should i buy?

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Jenu


How many W RMS audio system should i buy to connect it with the LED TV if the size of the room is 11x19 feets?


Answer
AVDADDY nailed it on the head, but I'd like to add something for people reading this to consider.

Most people have no grasp of how much volume level just 1 single watt of output really is. With typical speakers of reasonable efficiency, you'll have to raise your voice to hold a conversation over a stereo playing at the 1 watt level. At the 10 watt level, you'll be shouting to hear each other.

Small speakers actually require more power than large speakers on average. As I type this, I am listening to a vintage Magnavox TOTL console stereo from the 1960's. Monstrous 15" woofers, 4 large horns on the front, and what was rated at 150 watts total by older EIA/IHF standards... closer to 20w/ch today. That console will truly shake pictures off the walls if you crank it. You literally feel the bass in your feet as you stand in the room with that 300 pound beast holding the floor down, and absolutely can't shout over it.

With average efficiency full range speakers, I'd be more than happy with 50w/ch of honest solid power than any of the crappy wattage schlock sold today. My home theater receiver is rated at 120w/ch, but I only have it as that Yamaha model is known to sound clean and is able to drive my JBL L7 speakers..something few modern receivers can do. I had to look up my model receiver to see what it was rated at - I had no idea. I don't care what the speakers are rated at either.

How can I safely clean wax off of an LED tv screen?




Jonathan


Long story short I've managed to get candle wax on my LED screen. I'm wondering what the safest most effective way to clean this off is. I'm thinking something like rubbing alcohol would work, but I want second opinions because I have never done this before and dont know what can and cannot hurt the tv.


Answer
If you're concerned about using the wrong solvent, go to a big office supplier and buy screen wipes. They contain a detergent and a mild solvent which will not harm the plastic surface and the material the wipe is made of will not scratch the surface either.

Alternatively, baby wipes seem to clean anything off anything and they don't harm a baby's skin, so they're unlikely to do much to plastic.




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Wednesday, January 8, 2014

Is having an LED TV vs LCD Tv going to make any difference when watching Dish Network?

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Jag


I am thinking whether to spend $200 more on an Samsung LED 120 Hz TV vs Samsung LCD 120 Hz Tv. Do you think the picture quality of an LED TV will be better when watching HD Channels on Dish Network?


Answer
The claim that "LED gives better picture quality than LCD" is one of the most common myths in this business.

In the first place, an "LED" set is nothing more than an LCD set with a newer type of backlighting. They both have the same LCD display.

In the second place, lab tests and owner reviews demonstrate that the important factor in picture quality is the specific model of a set, not its brand or whether it uses LED backlighting. While LED technology does provide advantages, there definitely are conventional LCD sets with better picture quality than certain low-rated "LED" sets. You need to carefully look at test results and user reviews in order to make a valid decision.

So the bottom line for you, in my opinion, is no--the picture quality difference, if any, won't justify another $200, unless the specs, reviews, etc. of the cheaper set suggest otherwise.

Are LED Screen TVs really more energy efficient?




RobReads


I heard in a news report a while back that LED TV screens would use a lot less energy that any TV made so far. Now I see them on the market, but the ads don't stress this. Are they significantly more energy efficient?


Answer
Generally, if other things were comparable, an LED TV is more efficient than an LCD, and they are both better than CRT tvs. There is no true "LED" tv yet - they are LCD tvs that use an LED backlight. Still they gain a little efficiency.

The problem in comparison happens because there are so many variables.
Each generation of TV has a revised set of power settings - from basic brightness to "ambient light settings" and the power drawn when the device is off or in "standby". Even if we compare two similar 40" flat screen televisions, if I have mine set for maximum brightness and crank up the color levels, my TV will use 15-30% more energy than one that is tuned for efficiency.
If my TV has twice as many pixels, or I have a higher refresh rate.. then I use more energy again.

Since the newer TVs are the only ones using the LED technology, these same new TVs are likely to be "hi-def" (more pixels 720p, 1080p etc.. ), and higher refresh rates ( 60hz. 120 hz, etc..) - the comparisons are not true "apples-to-apples" comparisons.
If you could find a group of machines that had all the other features the same.. or at least very close.. the LED backlight vs the LCD backlight should save about 10% (per IEA.org link).
You might save almost that much just by unplugging the set when not in use.

Right now, only the small OLED screens we see on cell phones are true LED.
Unless you spend real $$$, true LED tv won't be available for several years yet.
(see last few links, engaget, sony, lg)




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