Do You Need A Subwoofer

Writen by Hyun Kim

Since it is tough for small-sized loudspeakers to reproduce frequencies under 40 Hz, and really tough for under 100 dB, people often choose to use a loudspeaker just for this purpose. Hence the subwoofer, a kind of loudspeaker that reproduces bass frequencies ranging most generally from roughly 20 Hz to around 200 Hz. DO you need one? Depends upon how well you want to hear, if your sound is reproduced under 40 Hz.

Subwoofers' drivers, known as woofers, average between 8" and 15", and can run 34" even. And drivers begin at 4;" those under 8" generally don't reproduce lower frequencies with good quality.

Use high-powered amps with subwoofers and an electronic crossover and low-pass filter. There are two types of subwoofers; those with an amp in the subwoofer cabinet (active), and those without the amplifier (passive).

Home Theater

With regards to the use of subwoofers in home theater systems, they come mounted in a sealed enclosure. Some people like to focus attention of their systems around satellite speakers, hiding their subwoofer; hence it may be packaged within the system. Others build the subwoofer into the theater cabinet.

Why the separation? To keep them out of site, for one thing. Plus for sensitivity issues dealing with the areas' sound compatibility and mode. Some people prefer to place the subwoofer near the listener.

Bottom line is, if you want to be able to hear low frequencies, you need a subwoofer. If you don't care, don't' worry about it then.

When will this come into play? Lower frequencies are needed with older sound formats, like with vinyl records replaced with digital formats, like CDs, mainly with 5.1 formats Dolby Digital and DTS (where the ".1" channel is for the bass frequencies, for the subwoofer), common choice of mixed artists.

Hyun Kim is a freelance writer who writes about loudspeakers, home audio and home theater related topics. He loves to visit Stereo|411 to discuss home theater stores and read about bose home theater systems.

Dvd Duplication

Writen by Kristy Annely

How would you like to have copies of your favorite movie or songs and give them away to relatives and friends for special occasions? Or to record all your favorite love songs and distribute DVDs as your wedding giveaways? DVD duplication is the answer to your quest for a cheaper and unique give-away either for weddings, baptismal, birthdays, or any other memorable occasion.

DVD duplication is the act of reproducing optical media through copying. It generally means producing discs in small quantities. The content of the DVD disc is duplicated on an existing recordable DVD.

Duplication is the process in which small quantities of DVDs are manufactured. DVD media is loaded onto burners. The information is extracted through digital means from the master source which are then transferred to a blank disc. The information is then verified and the disc either accepts or rejects the copied version. With the advent and popular use of cheaper media, it is now possible to offer the same level of DVD duplication services to either customers who need small quantities or for those who opt for larger quantities.

DVD duplication has both cost and quality advantages. Using a DVD duplicator is proven to be a fast, cheap, and convenient method to get products to its intended market. If your business involves producing music and video products, you need to reach your intended market quickly and effectively. It is wise then to purchase a DVD duplication machine.

On the other hand, replication is the standard used when making large numbers of copied discs. A glass master of the information stored on the disc is made that, in turn, produces stampers. The stampers are used for injection molding of the information onto the disc. Layers of polycarbonate plastic protect the information which is then lacquered, screened, and ultimately packaged. Since most of these processes are fully automated, the cost per unit is cheaper when orders are from one thousand to two thousand pieces.

So there, start making copies of your favorite video or audio file and regale your family and friends with your taste in movies and music.

DVD Duplication provides detailed information on DVD Duplication, DVD Duplication Services, DVD R Duplication, CD DVD Duplication and more. DVD Duplication is affiliated with DVD Duplicator Printers.

The Advantages Of Owning A Big Tv

Writen by Morgan Hamilton

Why do people go to the cinema, when they can buy or rent all the movies they want and watch them in their own homes? It is mainly because of those lovely large screens that the cinema has to offer. The giant screen is what makes movies really exciting, every cinema lover will tell you that. That's why going to the cinema cannot be underestimated, especially if you want to taste how it feels to be IN THE MOVIE, to feel like you are participating in the whole thing, which gradually evolves in front of your amazed eyes.

Nowadays, thanks to the overwhelming development of modern high tech, we are experiencing the luxury to have those big TV screens in our homes. Take for example the entertainment systems that some firms offer on sale. These entertainment packages include a big TV set and a surround system: which can be installed in your home. With their help you get the finest taste of reality, when watching your favourite movies. Watching some movies on a big TV in your home is a really breath taking experience. You actually dip into the electronic reality and feel as you are part of the action. There is nothing more interesting than putting the surround system on. Every sound you hear reverberates in your brain, making the whole thing seem so damn real, that you even catch yourself taking deep breath when bullets seem to whizz past your head!

Together with the big TV, the surround system provides you with amazing feeling of real things happening. Big TV is the greatest invention specially made for movie fans to enjoy. You can get the incomparable feeling of being in the movie, which is something you cannot resist. The big TV screen is better than the smaller one, because they don't seem hold the whole scale of the movie frames. To adapt the film for the television, cinematographers need to cut off some space from the four sides of the frames, thus making it smaller. Then you get these black lines surrounding your TV screen, which really make it compatible with the requirements of a TV broadcast, but cannot be compared with the glorious feeling of watching the whole frames uncut. This is avoided with the big screen TV, or at least it's minimized to a great extent. You can relish at the full sight, as big as that offered in the cinemas.

If you really want to try it, feel free to browse through the numerous offers of selling big TVs plus other entertainment tools, both online and in the ordinary TV set stores. Big TV has really changed the way we perceive movies: it is by no means a substitute for the cinema, but what it offers is the opportunity to watch all the movies from the cozy sofa in your house, saving the magic of it in addition.

Morgan Hamilton offers expert advice and great tips regarding all aspects concerning electronics. Learn more at Owning a Big TV