Power Digital
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 LANZAR DCT5001D 5000W DIGITAL 1 CHANNEL HALF OHM STABLE POWER BASS AMPLIFIER  US $248.15
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 Lanzar OPTIHC5002 2 Channel Digital High Current Full Range Power Amplifier US $248.00
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Why It Is Good To Get An Efficient Power Amplifier
When you are ready to acquire new stereo amplifiers, you may well be thinking about how efficiently your amplifier performs. I'll show you what the term "power efficiency" means plus why you should take a closer look at this figure throughout your selection of new stereo amplifier.
A relatively high amount of energy is dissipated as heat when you get a low-efficiency amplifier. This can bring about quite a few issues: Amplifiers with small efficiency will waste a certain amount of energy. It's best to be aware of the additional power cost while choosing between a high- and low-efficiency type. The squandered energy is radiated by the amp as heat. Amps with low efficiency typically have several heat sinks to help dissipate the wasted power. Heat sinks and fans need space and are pricey. The amplifier hence will become rather large and expensive. Also heat fans are going to generate running noise. Low-efficiency amplifiers additionally require a great deal of circulation around the amplifier. Thus they can't be placed in close spaces or inside air-tight enclosures.
Low-efficiency types need more overall power in order to create the same amount of audio power as high-efficiency models. Consequently they need a larger power supply which makes the amplifier more expensive to produce. Additionally, the thermal stress on the circuit board elements and amp materials is more serious and may even reduce the reliability.
The efficiency is shown as a percentage in the amp data sheet. Class-A amplifiers are among the least efficient and offer a efficiency close to 25% only. On the other hand, switching amps, often called "Class-D" amplifiers provide efficiencies as high as 98%. The larger the efficiency figure, the less the amount of energy wasted as heat. A 100-Watt amp which has a 50% efficiency will have a power consumption of 200 Watts.
What is less known about efficiency is the fact that this figure isn't fixed. The fact is it varies depending on how much power the amp offers. As a result at times you will discover efficiency values for different power levels in the data sheet. Amps possess greater efficiency when providing larger output power than while running at low power due to the fixed energy that they consume regardless of the output power. The efficiency value in the amp data sheet is normally provided for the maximum amplifier output power.
In order to determine the efficiency, the audio energy that is used by a power resistor that is connected to the amplifier is divided by the total power the amplifier uses whilst being fed a constant sine wave signal. To obtain a complete power efficiency profile, the audio power of the amplifier is swept between different values. At each value the efficiency is tested and then plotted onto a chart.
While picking a sound amp you have got to weigh efficiency versus fidelity given that low-efficiency analog amplifiers often deliver the highest music fidelity while digital types will have bigger distortion. Then again, digital amplifiers have come a long way and are providing improved music fidelity than ever before. Class-T amps come close to the audio fidelity of analog amplifiers. Therefore choosing a switching amplifier with great music fidelity is now feasible.
Are there are any solar powered digital cameras that are out or being developed?
or maybe rechargers that could recharge the batteries with solar energy.
the reason i ask is because i want to travel around the world even to some remote areas where they might not have electricity so it would be nice to have a camera that i could recharge without electricity.
If your camera runs on AA, AAA, or larger batteries, then check out the following links to learn more about solar rechargers.
Creative Energy Technologies
http://store.yahoo.com/cetinc/698.html
Ben Meadows Company
http://www.benmeadows.com/
You should also check out the Eclipse Solar-Powered Camera Bag
The Eclipse Nova Solar was made with the DSLR user in mind. It can charge AA and camera batteries by harnessing the power of the sun.It could be great for nature photographers. $150 from Eclipse—kind of ironic the name of the company is Eclipse, and they make solar gear.
Check here-
http://www.eclipsesolargear.com/productcart/pc/viewPrd.asp?idproduct=18
News:
CryEngine 3 to power Crystal CG (Gamesindustry.biz)
Crytek's CryEngine 3 has just be licensed by Crystal CG, which specialises in
3D digital visualization technologies.
"When we saw the first results from Crystal CG's work with CryENGINE 3, we
were blown away," said Crytek's Carl Jones.
"The combination of the incredible talent and our all-in-one real-time
development solution not only ensures brilliant visuals but also a very smooth
workflow. We are really looking forward to seeing more from Crystal CG."
Read more...
Power Digital - Rosy e Ivan Daniele - Vancello a dicere
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