The Brogue Hog

It was unthinkable ten years ago, to purchase large household appliances such as tvs, refridgerators and cooktops anywhere else but at the electrical or appliance stores. The only way to grab a deal or receive a discount was to shop in the scratch and dent department or purchased several appliances at a time.

However, thanks to the internet, that has totally changed. There is a large variety of on-line shops that specialize in offering customers a big selection of household appliances, such as LCD TVs, plasma tvs, refridgerators and microwave ovens. Customers can save time travelling from one shop to another by comparing prices in a matter of minutes via the Internet.

There are now numerous online stores that are desperate to make the sale, you can often get appliances like tvs, fridges, cooktops and ovens at unbeatable prices. There are also some websites that are set up to provide you free online coupon codes, promotional offers and discount deals from online appliance dealers that can save you even more of your hard earned money.

Shopping online allows you to research on the company through previous customers’ feedbacks and remarks before deciding. Shopping at a brick and mortar store does not provide you with that peace of mind.

Buying on-line also allows you to select your appliances in every name brand available. You can chose between every make, model and option available direct from the manufacturer instead of just what is on the sales floor. An added bonus is that most online retailers have fantastic shipping options such as next day shipping direct to your door step. This saves you the hassle trying to figure out how to get your purchases from the store to your destination.

So join the thousands of people who buy their large items lcd tv, plasma tv, fridges, ovens, as well as all of their other large household appliance purchases online daily. You will experience the benefits and savings for yourself.

Robens tents are an excellent choice for those seeking a memorable outdoor experience. With a wide range of superior quality tents, sleeping bags and other outdoor equipment, these tents have been very popular in Europe since1984. The company offers a wide range of quality products in four categories, Lightweight, Trekking, Adventure and Outdoor.

Osprey 2, a recent addition to the Lightweight category of Robens tents, is perfect for two persons. It has internal pole sleeves to keep it stable during harsh winds and has good roof sloping so that no snow builds up on the top. This tent has two entrances and provides good ventilation because of the internal vents.

A good tent for trekking from Robens tents is the Voyager 3 EX, which is a 3-person tent with a Gothic arch design. This tent has large storage space, can be easily put up by a single person even in rough weather conditions, and remains dry from inside during the rains.

Under the Adventure category, Double Dawn is a good option for four people. The sides of the tent are made steeper to ensure more room and the window provides good ventilation, while the poles ensure great stability.

A good family tent in the Outdoor category of Robens tents, with capacity of six people, is the Triple Horizon. This tent provides ample space for an entire family to cook, relax and even play indoors during bad weather. It has five entrances that keep it well ventilated and it is fitted with a mesh to keep the insects out.

The Holy Grail of distributed audio; unlimited zones and unlimited sources, cost effectively. That milestone will be achieved, and soon, through the combination of digital amplification and IP based distribution systems. There are systems available today that use one or both of these technologies, such as Oxmoor’s Zon system and Netlinks’ Netstreams product line. The trend will only continue to grow.

The beauty of this approach is that digital music is data, and, as such, can be distributed easily via an Ethernet network. The traditional concept of zones virtually disappears, as each amplifier on the network gets a unique IP address, enabling an audio stream to be routed to it. When combined with a digital music server, the number of zones is limited only by the ability of the server to serve independent audio streams.

The advent of cost effective digital amplification, produced by companies such as D2 Audio and Flying Mole, allows a small, highly efficient audio amplifier to be located close to the speakers, either in the room or mounted in an electrical box. The logical evolution of this approach is to collocate amplifier with the speaker, creating an active speaker. Additional benefits are realized by incorporating the speaker as part of the circuit. This enables the designer to engineer the speaker and amplifier circuits for optimum performance as a system.

Low powered designs of this nature could take advantage of power over Ethernet (POE), simplifying system wiring by allowing a single CAT-5 cable to be run from the router to the speaker. This would not supply a large amount of power (about 15 watts) due to the constraints of the 24ga conductors used in CAT-5. However, the efficiencies gained by an integrated speaker / amplifier design would mitigate this concern to some degree. This type of system is sufficient for background music applications in many residential environments.

Higher power systems can use the existing speaker wire, in the case of a conventionally wired system, to carry power. It can / does use the existing control cable, since many systems have been wired with CAT-5 to the volume control location, for the data.

The bandwidth of a traditional 10/100 network allow, for all practical purposes, an unlimited number of zones and sources in a residential environment. Partly because of this, Audio Over Ethernet has been used successfully in the commercial audio and sound reinforcement world for a number of years now. Cobranet, from Cirrus Logic is the most popular commercial AOE system used today. Another popular system is available from Digigram. These systems both use the MAC layer of Ethernet and are not actually using IP for transmission.

For both residential and commercial applications another primary advantage of using Ethernet is the ability to use the medium for transporting both audio and control signals down the same wire. This increases flexibility and reduces cost for both installation and material.

As was true in the commercial world, the distribution of audio (and soon, video) and control via Ethernet will continue to proliferate in residential distributed audio applications. The combination of flexibility, cost effectiveness and capability are to attractive to be ignored.

Steve Faber has almost 15 years in the custom installation industry. He is a CEDIA certified designer and Installer 2 with certifications from both the ISF and THX. His experience spans many facets of the industry, from the trenches as an installer and control systems programmer, and system designer, to a business unit director for a specialty importer of high end audio video equipment, a sales rep for a large, regional consumer electronics distributor, and principal of a $1.5M+ custom installation firm. Steve is currently is senior sales engineer for Digital Cinema Design, a CEDIA member firm in Redmond, WA. He is on the web at http://www.1touchmovie.com

Most people think that in order to have a home theater system you have to have a lot of money or know someone who installs them. This simply isn’t true. Home theater systems are becoming more popular in this day an age. However, being super rich or having a friend (who may or may not be an expert on electronics) tell you where to find the best deals is an unecessary risk. All you need is the basic knowledge of where to go.

Ok, first you need to establish if you want a theater system with a projector, screen, and speakers; or if you’re just looking for a theater system to go with your television set. If you are wanting a system to go with your television you can go to www.audiospeakersale.com and find pretty much everything you need to get the job done. They have home theater speakers, dvd players, home theater systems with dvd players, etc. I have found that they are an excellent source for all of your home theater speaker needs.

Now that you know where to find home theater systems for your television lets move on to find the other theater components, for those of you who wish to have a projector based home theater system. We will start with the projector. It is crucial that you purchase a projector that can offer you the quality that you will be satifactory to you with out breaking your wallet. The the best place to purchase your projectors from is www.theprojectorpros.com. There are different kinds of projectors available. Be sure to pick the one that will meet a pixel size (resolution) to your liking. They offer several different video services (incase you want an alternate display other than projection). You will also want to get your screen from here as well.

These two websites provide great customer service and quality products. They make sure the customer has a complete understanding of how every product works and how to get the maximum usage out of their system. Hopefully these resources will be helpful to you. Remember you don’t have to spend a fortune to enjoy your own home theater system.

Chris Vazquez

Official is also an important part of every game. If you have a team for a game you have to get some officials to maintain your team schedule and many different jobs. As an official member, you will need official uniform to separate you from the players and other people. Officials have some different role on the game strategy and you can take their help for some special purposes. They will help you to organize your team management system and many important jobs which you can do with your own. Official uniform is like the player uniform and every team has some similarity with their official uniform and player uniform.

You can buy the official uniform from any games apparel selling company. Most of the games apparel selling and manufacturing companies also sell and manufacture official uniform and the Gordon International is the best of them. They will provide you the best quality products with the lowest prices of the market and surely it will save some money of your’s.

You can buy any official uniform with the similar design style of the team uniform. Because you need to recognizable among other players and officials. The uniform will provide perfect comfort and flexibility to the officials in any situation you will face to organize a game. The uniform will save the officials from any type weather disaster.

Remember the Osborn? Or was it the Osborne? Actually, I knew it existed, but didn’t care. This thing was a personal computer. Like we’d ever need one of those? Those new electric typewriters with memory were the rage. THAT was something!

Flash forward and we are upon the reverse engineered UFO goodies. Oh, wait, no, that’s not exactly right.

It’s the dawning of the age of Aquarius, age of Aquarius, Ah QUAR EEEE USSS. Um, no, that was some time ago.

It’s the age of $3 US Gas. Not a good milestone.

The age of HDTV!!! Remember when “high definition” included the terms “stems and seeds?” You do? You rascal.

No, this is about High Definition TELEVISION. Personally, I feel the word TELEVISON is so…. Fifties. We need a new one there. So did you jump for the Plasma? Or the LCD projector? The DLP? Have you got the home theater with all the tricked out electronics?

Don’t put your ear directly on the high tech train tracks, then, because there’s another train coming, and you’ll hear it down the line.

UHDV is in the pipeline. On the track. In the lab. In the electron wind. Want to guess? Time’s up. ULTRA HIGH DEFINITION.

Remember the movie where they invent this skull cap that would capture your emotions and immediately the bad guy looped someone having how shall we say - some very intense happy times… and turned himself into peak experience broccoli? Is that where all this is headed? Not for a while, if ever. HOWEVER: UHDV is close to the detail of 35mm film. With 7680 x 4320 pixels, this isn’t far from the 4K (4,000 scan line) digital projection systems for big-screen movie theaters.

Donald Trump will be able to see how bad his hair looks like never before.

UHDV features 33 million pixels with a 60 frame-per-second (fps) progressive scan format.

NHK, the Japanese broadcasting giant who had HDTV in the 1980s… is behind the UHDV format, but reassures us it may be a long time before home theater UHDV becomes reality. That’s corporate talk for, “Don’t let the competition know how close we really are!”

With 32 times the bandwidth demands of HDTV, UHDV would be prohibitive for today’s broadcast, cable and satellite technology. NHK’s demo required a data rate of 24 Gbps. That was a few years back in Amsterdam where some people were close to hurling lunch because the moving car video hi-jinx was that real.

How real?

NHK cobbled together a custom camera of four CCD image sensors; then to show the output built a LCoS projector combining four eight-megapixel panels. Data storage, using 16 synchronized HDTV recorders, provided roughly 18 minutes of recording time, using 3.5 terabytes of total capacity and a screen about 12 feet high and 22 feet wide. NHK researchers called this “the sensation of reality saturation point,” in the hopes of providing a completely immersive experience: 100 degrees of visual field angle, viewing from a distance of three-quarters of the height of the screen (about nine feet) with at least 60 pixels required for each one degree of visual field angle.

And speakers? UHDV offers 24-channel sound, or 22.2, containing vertically arrayed surround sound speakers: nine above ear level, 10 at ear level, three below ear level and two low-frequency subwoofer channels.

The format, according to NHK, is not so much intended for home use as for museums, public spaces and theaters. You tell The Donald.

Once upon a time there was SHOWSCAN. Special effects pioneer Douglas Trumbull had his demo unit in a suburb of Dallas, behind a Chucky Cheese, if memory serves. I saw the demo.

The equipment and the Showscan Film Process of producing and projecting Showscan films are justifiably proprietary and patented. At the time, Showscan’s discovery was hailed as the most significant advancement in film technology since the introduction of sound in the 1929 film “The Jazz Singer”. (Not the one with Neil Diamond.) However, it remained as little more than a technological curiosity until the company developed new camera, high speed projectors, and built special theaters to showcase the revolutionary Showscan images. There was a catch-22 at work. Theaters weren’t equipped for this state of the art projection so they couldn’t convince investors to make films in that format. Solution: do it all in house.

I can’t remember the specs but it was scarily real, 3-D, multi channel and way ahead of multi channel… or HDTV. I do remember it ran film through the gate much faster than normal projection speeds.

Today the company’s simulation and specialty theatres are open or under construction in 24 countries around the world, located in theme parks, motion picture multiplexes, expos, world’s fairs, resorts, shopping centers, casinos, museums, and other tourist destinations where somebody wants a rush.

If NHK can even come close, well…

Enjoy your puny HDTV now while you can, citizen.

Bob Wood’s website, http://www.GreatHomeTheater.com, covers the video and audio fields as they apply to home theater and home entertainment. Bob spent many years in the US and Canada at popular radio stations and recording studios as programmer, producer, and talent.

It is all an issue of Image Resolution

There are currently three different HDTV formats: 720p, 1080i, and 1080p; all three are designated as HD-Digital TV standards by the Advanced Television Systems Committee (ATSC), which adopted these formats.

The main difference between these three HDTV formats is one of image resolution.

The 720p is on the lower-end of the scale with an image resolution of 1280 pixels by 720 lines. The other two formats both support 1920 pixels by 1080 lines.
In other words, both support the same image resolution but there is a significant difference in the way the 1080i (interlaced) and the 1080p (progressive) formats build up the image.

Surely, image resolution in fixed-pixel displays is a very HOT topic with many HDTV buyers. For many, the obvious choice is to opt for the latest 1080p HDTV - also referred to as ultra-HD or full-HD by some manufacturers …but there is a price to pay to get the latest in HDTV technology.

On the other hand, the way the 1080i and the 720p formats build up the image may render the lower resolution 720p format more suitable to display certain image content.

In other words, do not simply jump to conclusions as to which HD format is best. As we will see in this article, each of these different HDTV formats has got its strengths and weaknesses.

1080i: Up to a few years ago, this was considered as the reference standard in HDTV. Nearly all first-generation HDTVs were rear-projection sets that supported this standard.

This format boasts a picture resolution of 1920 pixels by 1080 horizontal lines that are painted on the screen in two interlaced halves (hence the ‘i’ in the ‘1080i’ format) - by first painting all 540 even-numbered lines on the screen (also referred to as the even-field), and then proceed with the painting of the odd-numbered lines (odd-field). These two fields together form a single frame of 1080 lines.

In the process, the screen is painted 60 times per second (50 times in a PAL signal) - each time painting only half of the lines per frame, with the entire screen being painted in two passes 30 times every second.

Because of the way the interlaced process paints the screen, all picture information contained in adjacent odd and even lines in an interlaced image is 1/60th of a second out-of-synch with the next or previous line. This in itself will impact on the type of image content that is best displayed on an interlaced display.

720p and 1080p HDTV: In contrast, in progressive-scan formats - 480p (EDTV), 720p and 1080p HDTV displays - all scanning lines in a single frame are displayed sequentially in a single pass.

In the process, a progressive scan video format writes one full frame of video information every 1/60 of a second as against the 1/30th of second required for an interlaced format.

The Bottom Line

The 1080i format is more widely supported by manufacturers and broadcasters; broadcasters however would normally broadcast only in either 720p or 1080i but not both. This should not be much of an issue in that any HDTV set you buy should be able to display pictures in any HDTV format by up-converting or down-converting to its native format, i.e. the one in which it’s designed to produce a picture.

From a pixel-count perspective, the 1080i supports better spatial resolution than a 720p HDTV display. In fact, while a 1080i supports a total pixel count of 2.07 million pixels, a 720p display supports only 0.92 million pixels. This means that if you want to display a 1080i signal on a 720p screen, you will lose 55.6% of pixels information.

This is not the case with 1080p HDTV which supports the same spatial resolution as 1080i, but with the added benefit that all 1080 scanning lines are displayed in a single pass, 60 times per second.

In other words, 1080p HDTV combines the superior resolution of the 1080i format with the progressive-scan smoothness of 720p HDTV.

Because of the two passes per frame in a 1080i signal, a 1080i HDTV display is capable of producing a sharper picture only when the image is frozen or barely moving.

Progressive-scan 720p and 1080p HDTV displays introduce fewer motion artifacts, such as jagged diagonal lines and movement in fine detail, into the picture, leading to a video image that looks smoother and that stays sharper during motion than an interlaced one.

This means that a 720p display - with its substantially lower picture resolution, need not necessarily be worse than a 1080i one. Theoretically, a 720p display should be capable of a better flicker-free picture when it comes to fast moving action movie scenes and sports.

In comparison to the other two HDTV formats, 1080p HDTV has the best of both worlds - it has the spatial resolution of a 1080i signal and the smooth stable image of a progressive scan format.

It is worth mentioning here that interlaced formats aren’t really an option in fixed-pixel displays (DLP and LCD rear-projection as well as plasma and LCD flat-panel). This also explains why display manufacturers are shifting away from the 1080i and instead moving directly from 720p to 1080p HDTV.

And What about 1080p HDTV Sets?

Surely, 1080p HDTV represents the latest developments in HD Television technology. A few of these sets have already started to hit the market.

Among the latest HDTV models released this year, one can find the much awaited Samsung’s 2005 line-up of DLP 1080p HDTVs.

Not surprisingly, these sets do not come cheap. There is a premium one has to pay to get the latest and best in the HDTV world. As a minimum, expect to pay at least $1,000 to $2,000 more to jump from a 720p to a 1080p HDTV display. But when you are spending some $3,000 plus for a HDTV set, it is only human that you will be ready to fork out another one or two thousand dollars to get the best of breed.

Should you opt for a 1080p HDTV Set, and are these sets worth the extra expense?

Well, there is no straight answer here. It all depends on what are your requirements, yet there are a few facts you should know before making any decision:

• Surely, these sets are capable of producing spectacular results with ultra sharp images. But whether you will be able to see the difference in image quality between a 720p display and a 1080i signal displayed on a 1080p HDTV display depends on your TV viewing distance and screen size, more than on the screen native resolution. (It is not the scope of this article to discuss the TV viewing distance but more info in this respect is available at our site at http://www.practical-home-theater-guide.com/Tv-viewing-distance.html)

• In reality, it would be very difficult to detect any difference in image detail between 720p and 1080i/p HDTV material on the smaller sets from 10-feet away. Sit closer and feed your 1080p HDTV set with a good quality HD source, and you will start to see the difference.

• Further more, with most of today’s HD broadcasts, you’ll be hard pressed to see a difference in picture quality when you compare the image on current 720p sets versus the latest 1080p HDTV models. Surely, if you are thinking of going really big, then the extra image resolution would make the difference. But keep in mind that at present, true 1080p HDTV material is almost non-existent. What’s more, none of the major networks has announced 1080p broadcasts. If and when such high-def formats as ‘Blu-ray’ or ‘HD-DVD’ take off, the equation may change. But it will probably be at least a few years from now before this stuff become truly within reach of many household budgets.

Finally, most 1080p HDTV sets presently available on the market do not offer a 1080p connection. Though the HDMI standard does support 1080p HDTV, yet the majority of today’s 1080p HDTV sets do not offer a 1080p connection on their HDMI port.

To a certain extent, this is explained by the lack of true 1080p HDTV gear with which these sets can interconnect. In fact, what 1080p sets do is to up-convert 1080i material to 1080p HDTV to combine the benefits of a superior resolution of the 1080i format with the image smoothness and motion sharpness of progressive-scanning.

(c) 2004/2005 www.practical-home-theater-guide.com. All rights reserved.

Andrew Ghigo - A Telecoms/Electronics engineer by profession, with specialization in digital switching and telecoms fraud management systems.

Editor and publisher of http://www.practical-home-theater-guide.com - a site dedicated to all home theater enthusiasts with the scope of serving as a comprehensive home theater guide to home theater systems, product reviews and home theater design.

This article is an excerpt from a series of guides appearing under the Rear Projection TV Reviews section of the site.

Have you ever tried to get some peace and quiet at home, in your car, boat, motor home, or even at the beach? A portable DVD player really works well anywhere to keep children content and quite while Mom and Dad enjoy the silence. It has the same effect on adults too!

The portable design will maximize your enjoyment. While you are traveling and when you arrive at your destination. Whether it be a hotel, airplane, cruise ship, campsite, or just about anywhere, a portable DVD player will allow you to watch the movies of your choice…when you want to watch them. Most airline flights do not have a movie. Hotels and ships do offer pay-per-view movies; however, the selection may not be of your liking, you can’t pause them, watch them on the balcony or pool side, or repeat something you missed, without either paying more or watching the whole movie again.

You won’t need a shelf type DVD player in your home and your friends won’t need one either. Your portable DVD player can be connected to most any TV to watch your favorite DVD on a larger screen in any room. If you are looking for the best surround sound home theater experience, a portable DVD player can be connected to high-end home theater systems via optical link digital audio cables and S-video, instead of the included RCA cables. There are portable DVD players which offer the ability to view your favorite movies on a small screen and pump out sound comparable to their bigger brothers.

Business people can use a portable dvd player to to give a presentation anywhere. There are dvds that will teach you and read you a book.

Use your imagination, as there are virtually unlimited applications for a Portable DVD Player.

John Joyce

http://www.aportabledvdplayer.com

First step after you decided to have theater speakers at home is to choose the suitable product. Speakers can have various shapes and characteristics and some of them are pintable. There are two kinds of on wall home theater speakers. The round speakers are usually integrated in ceiling and rectangular speakers suit better in walls.

Ceiling speakers are usually easier to integrate in the room decoration and have to be disposed symmetrical to provide an excellent background frequency response. On wall home theater speakers take up more space and should be situated at ear level, but usually their sound is better than in ceiling speakers. For best performance it is recommended to use stereo pairs of on wall speakers. But ceiling speakers should have mono signal, otherwise the sound will not have a uniform coverage. For small rooms the most suitable are speakers with dual voice coils and inputs for each channel. So, with a single stereo speaker, you may listen into your bathroom great quality music.

After you choose the rooms where yow want to install your speakers, you can set-up your multi-room speaker system as single zone or multiple zone system. In a multi zone system you can listen to different kind of music in separate room in the same time. You may control this system with a special remote control or you can choose to be helped by a touch screen. Touch screens are easily to work with, and are very helpful when you want to manage different sound sources from each room or to compensate the loss of high frequency response in a less acoustic place.

The in ceiling or on wall home theater speakers are generally easy to install but for sophisticated sound system it is better to consult qualified professional for assistance.

If you find this information useful you should visit the site http://www.home-theater-system-store.org where you will find lots of interesting articles related to this topic, all original and wrote by Michael Lastun.

Rear Projection Television - An Affordable Option

A great deal of consumer appeal for Rear Projection TV systems arise out of the shear simplicity that this product offers as an immediate solution to getting a bigger TV.

No mess, no fuss, if you have the space, either visit your local big screen retailer - or better still, check at your favorite online electronics superstore - to order your product and get it delivered in just a few days; unpack the product and there you have a big screen TV in your living room ready for immediate use!

Rear Projection TV Facts:

As already stated, rear projection offers a most immediate solution to getting a bigger TV. Probably, this is also one of the main drivers behind rear projection television sales.

Yet the real ‘culprit’ behind the popularity of rear projection TV systems does not arise out of some particular benefit associated with rear projection, but out of the fact that most big screen retailers seem to give the impression that rear projection systems are cheaper than a front projection setup.

This may be true in retail stores, but not necessary so when buying online. The reality is that for a given budget level, prices online are such that front projectors will deliver a much more cinema-like experience for the same price bracket. Therefore, do not base your decision on price alone to decide between a front projection setup and a rear projection TV box.

Clearly, there is a market for both - the primary decisive factor should be your room size. If you don’t have a large viewing room, a 40″ to 60″ diagonal TV will probably be more than adequate rendering a rear projection TV the ideal affordable solution - as long as it fits in the available space.

Size - or rather unit depth - is becoming less of a problem with modern LCD and DLP rear projection TV units. A typical 52″ diagonal widescreen DLP or LCD rear projection TV set requires no more than 15-inches in depth; this contrasts heavily with a similar size CRT rear projection model which would normally require between 22 and 24 inches in depth.

What’s more, considering that a similar size Plasma TV is still out of reach of most average household budgets, today’s slim-styled LCD and DLP rear projection TV sets, with their lower prices yet high performance, are becoming the affordable ‘immediate’ big screen TV option in the television mass-market.

However prior to committing yourself to a rear projection TV, it is important to be fully aware of a few limitations associated with rear projection systems, namely: limited screen size, limited viewing angle, glare problems, poor aspect ratio management, poor use of floor-space, etc.

We take a look at each of these limitations in further detail below:

Screen size:

Rear projection TV systems come in screen sizes ranging from typical 42″ up to a maximum of just over 70″. This may or may not be a limitation. It is true that you can get a 100″ projection with a home theater projector for the price of a high quality digital 50″ rear projection TV, yet the screen size should be dimensioned to suit your room. If your room size does not support such big projections, rear projection is probably the way to go.

Viewing angles:

Rear projection TV systems used to have a rather limited viewing angle - with the optimum viewing position being one directly in front of and eye-level with the unit. Move away to either side, and color, contrast, and brightness will degrade substantially. A narrow viewing angle will limit the number of people who can watch the set due the lowering in picture quality at the extreme viewing angles. Most modern systems support a viewing angle of circa 150 degrees - which should be adequate for normal home theater use. However, it is always best to check on this prior to your purchase as some products are worse than others.

Reflections:

It is common that any light source at a complementary angle to your viewing-angle will result in glare - in particular if the unit makes use of a screen-saver (a clear protective material that covers the fragile screen itself). Glare can seriously degrade the picture quality. The only real solution is to take away the offending light source; in some cases the situation can improve if one removes the screen-saver - BUT remember that an unprotected screen is fragile and expensive to replace if damaged.

Floor-space:

Any rear projection TV is literally a large box with a relatively large footprint. It is true that modern slim-type models do exist that are no more than 15 to 18 inches in depth - depending on the screen size, yet the cheaper CRT-based rear projection TV sets will stand out by at least 24 to even 30 inches to allow for the necessary air-space between the back of the unit and the wall.

Remember to take this into your calculations when planning your home theater as these two feet or so will have to be deducted from your available viewing distance.

Rear Projection TV Speakers:

Forget all about them! Do not give any weighting to the speaker system coming with your rear projection unit. You would not be using them as you will surely want to replace these with your dedicated home theater surround receiver speaker system.

Do not even think of using the build-in speakers of your rear television set as a center channel replacement. They will just interfere with the sound coming out of your dedicated system - hence do not pay anything extra for this as you will surely be switching off your TV sound completely during a movie show.

Aspect ratios:

We have already mentioned a number of limitations associated with rear projection television, yet in comparison, these are just minor issues. The real serious limitation with a rear projection TV is aspect ratio management.

This is the trickiest of it all. Standard television comes only in 4:3 but rear projection TV systems come in both standard 4:3, and in the 16:9 widescreen format. Once you choose your format however, you have to live with it - so once again, you have to choose wisely.

The 4:3 (1.33) or 16:9 (1.78) referred to as the aspect ratio, is the ratio of the screen width with respect to the height of the image. All standard non-HDTV material is in the 4:3 format while most modern films come in one of the many widescreen formats - the most common being the 2.35, which in itself is not compatible with any of the fixed aspect ratio TV systems.

There are various ways to deal with this - including:

• Image stretching to fill the available screen.
• Use of black or gray bars on top and bottom of a 4:3 screen to show the movie in its correct aspect ratio as originally filmed, but then the effective film display will be smaller.
• Pan and scan editing where only the most important portion of each frame is shown with the rest being discarded.

Image stretching and horizontal bars can be extremely irritating while in the ‘pan and scan’ you are giving up film information to have a full screen view. Worst of all, prolonged use of horizontal bars - especially black bars - leads to tube burn-out in CRT based systems at huge costs to you.

The incompatibility between screen formats renders the decision on aspect ratio a rather complicated issue when choosing a rear projection TV set. Surely, there is no such dilemma with a front projection setup, but if your only way forward is rear projection, then you will have to choose wisely.

Here no one can help you in your decision - it is simply a matter of preference. The best way to decide on aspect ratio is by first determining what you will be viewing most.

Making the Choice:

Surely, there is a market for both front and rear projection TVs - it is all a question of knowing what are the advantages and limitations of each with respect to your specific needs.

Andrew Ghigo - A Telecoms/Electronics engineer by profession, with specialization in digital switching and telecoms fraud management systems.

Editor and publisher of http://www.practical-home-theater-guide.com - a site dedicated to all home theater enthusiasts with the scope of serving as a comprehensive home theater guide to home theater systems, product reviews and home theater design.

This article is an excerpt from a series of guides appearing under the Projection Television section of the site.