I will have a look at a few audio amplifiers as well as mini amplifier models and explain some fundamental expressions to aid you choose the best amp for your loudspeakers

Audio amps are available in all different shapes and sizes. They use different technologies and have countless technical specs. This makes it hard to decide which type to pick. You don’t have to be an expert. Just follow some plain suggestions and you should be satisfied with your amplifier.

The most obvious criterion is the size of the amp. There are models that are as large as half your living room while several of the latest mini amplifier types are as tiny as a bar of soap. A large number of amps are the size of a typical rack. This permits your amp to be stacked on top of your other audio equipment.

The vast majority of modern audio amplifiers are solid state amplifiers vs more conventional tube amps. Tube amps have been prevalent a decade or so ago. Tube amplifiers, on the other hand, have a relatively high amount of harmonic distortion. Harmonic distortion refers to how much the audio signal is degraded while being amplified. This term is frequently used while evaluating the audio quality of amplifiers.

Tube amplifiers will have audio distortion of up to 10%. Solid state amps will have lower audio distortion depending on the amplifier technology that is utilized. Some of the most accepted technologies in the past have been "Class-A" and "Class-AB" technologies. These technologies use different arrangements to amplify the audio. Amps based on any of these technologies are also known as "analog amplifiers". This technology offers fairly small audio distortion. However, the power efficiency is only 10 to 30%. This means that the majority of the electrical power supplied to the amp is wasted as heat while a tiny fraction is utilized to amplify the audio signal.

"Class-D" amplifiers, however, which are also called "digital amplifiers" have a power efficiency of at least 80% and are smaller and have a smaller power supply than similar analog amplifiers. Because of the switching output stage, digital amps usually have larger harmonic distortion than analog amplifiers. On the other hand, a number of of the most recent models are able to reduce distortion to 0.05% and lower by using a feedback mechanism.

When picking an amplifier, make certain that the output power is sufficient to drive your loudspeakers. The needed power will be determined by how much power your speakers can handle as well as the size of your room where you will be listening. Loudspeaker power handling is given as peak power which describes the maximum amount of power during short bursts while average power refers to how much power the speakers can handle constantly.

In a small listening environment, you might not need to drive your speakers to their rated value. 20 to 40 Watts of power would probably be sufficient. Loudspeakers on the other hand differ in their impedance and sensitivity. As a rule of thumb speakers with low impedance offer higher sensitivity. High-sensitivity speakers are simpler to drive to high volume than low-sensitivity loudspeakers. Not all amps can drive every speaker impedance. Find out the impedance of your loudspeaker which is given in Ohms. Then look at your amplifier manual to ensure that your amp can drive this impedance.

Finally, be sure that your amp introduces little noise and has a broad enough frequency response. High-quality amps will have a signal-to-noise ratio of at least 100 dB and a frequency response of no less than 20 Hz to 20 kHz.

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Recently a large number of wireless audio products have emerged such as latest-generation wireless headphones, iPods, cell phones and wireless amplifier products which promise to cut the cord. I will take a look at if these products keep their claim to deliver perfect-quality audio. Moreover, I will take a look at the underlying technologies.

These products fall into 2 categories. The first sort of products already has wireless built in. Second-category products, such as a number of streaming audio products, have optional wireless functionality. Normally they have a slot to insert a wireless LAN card. Modern cell phones and MP3 players already come with support for wireless. iPhones and touch-screen iPods, for instance, have Bluetooth and WiFi.

The Bluetooth protocol is a fairly low-cost solution. Still, its limitations have an influence on high-quality audio applications and are often ignored.

1) Short range

The range of Bluetooth devices is normally merely 30 ft. This excludes Bluetooth from multi-room applications.

2) Small data rate - audio compression

Bluetooth offers a maximum reliable data rate of approximately 1 Mbps only. This rate is not high enough to send uncompressed CD-quality audio. As a result Bluetooth wireless devices use audio compression. This is less critical however for compressed audio such as MP3 audio but excludes Bluetooth from use in high-quality audio applications.

3) Audio latency

The audio will experience a delay of at least 10 ms for the most part due to the audio compression which is a dilemma for real-time audio applications but less critical for MP3 players.

4) No multiple headphone support

Bluetooth does not support any quantity of headphones which may be a problem if you have a larger number of people who want to listen to headphones from a single transmitter device.

WiFi is another commonly used wireless protocol that is also suitable for audio streaming. WiFi does support uncompressed audio but will have problems broadcasting to a high number of wireless receivers at the same time. As a consequence of the relatively high power consumption it is hardly ever used in wireless headphones though. WiFi is suitable for streaming audio from a PC however because nearly all PCs have WiFi access.

While newest-generation wireless speakers and wireless amplifier products utilize proprietary digital technologies, low-cost products frequently still rely on FM transmission which is noisy and has high audio distortion and high susceptibility to radio interference.

More advanced wireless protocols are based on digital formats which avoid audio degradation and incorporate sophisticated features including error correction to deal with interference from competing wireless devices.

Sophisticated wireless amplifier devices support uncompressed digital audio streaming to maintain the original audio quality. Some of these protocols permit streaming to an unlimited number of wireless amplifiers which is convenient for whole-house audio distribution.

Some of these protocols support low-latency audio transmission which assures that the audio of all speakers will be in sync in a multi-channel application. Typically newer generation wireless audio transmitters will operate at 2.4 GHz. Some transmitter devices, including Amphony's line of devices, work at the less crowded 5.8 GHz frequency band.

Wireless amplifiers offer different levels of audio quality, output power and standby power. Digital Class-D amplifiers offer high power efficiency of no less than 80%. They also have low standby power, normally less than 5 Watts. This minimizes heat and keeps them cool during operation. Some digital amplifiers, however, have fairly high harmonic distortion. Choosing a low-distortion amplifier is crucial. Good-quality wireless amplifiers have audio distortion of less than 0.05%.

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house moving This is a brief article on my opinion of satellite radio since I purchased it almost 5 years ago. These opinions are my own, and I'm sure others will differ. You can always have your own opinion if just go out and buy a Sirius universal tuner, and hook it up to your car. Then you can make your mind up on the matter.

juegos mario With the invention of radio modern means of communication has been driven to an unsurpassed height wherein ease in communication enhances the work ethics by reducing the time and money spend on communication related problems. Employees can instantly keep in touch with one another with the help of two way radio equipment. Radio as a modern means of communication is definitely creating a revolution in the field of communication.

Huge industrial units have thousands of employees and the supervisors who manage them must be around their respective groups to motivate and guide them to work properly. At the same time higher officials like field managers cannot possibly be present at every nook and corner of the industrial area. In such cases two way radio communication systems can help these people to stay in constant touch with one another. Apart from this these radios are highly efficient and very useful for security guards in the campus. The importance of this great means of communication is felt only when an emergency situation arises. At such times one can easily alert the others and thereby reduce the risk of theft or other security breaches.

home selling If you need an effective radio communication system to be installed in your premises, you should call a systems expert. They will access your needs and prepare a proposal as to what kind of equipment and the number of radio devices you will need along with the frequency of the system or the power needed to run the system efficiently will be evaluated. After this assessment, the rate for such an installation is discussed and then when the deal is finalised the installation work starts. The central radio communication device systems are installed and thus your company will have an efficient and purpose driven communication system instantly. These radio communication systems are handheld wireless devices which are very handy and easy to use.

In case of popular events or if you need these devices for particular events or programs then you can even hire these devices. Many companies provide sales as well as hire the radio devices for a moderate rent. Whatever the need the sales, after sales maintenance and repair is all generally handled by the single company who offers you the device. It is best to choose such a company for these services as they will know about the devices better.

Both the features are able to provide an access to most of the radio channels operating in the world, but each has its own process of doing so. Although affordability is one aspect of acquiring a satellite radio, but the meaning of the word 'free' is visible in the feature of live Internet radio You can be published without charge. You can to republish this article in your website or blog. Please provide links Active.

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Online radio such as AOL Radio, Slacker, Pandora and Last.fm have gained popularity recently. Furthermore, a lot of cordless devices like cell phones support these platforms. Does this mean the end of traditional radio stations? I will look at the impact of online radio on the radio landscape.

I seems that local radio stations are on their way to become extinct. They are being threatened by the development of online and satellite radio. These competing services commonly offer hundreds of music and entertainment channels. A number of the channels are even commercial-free. There is virtually an infinite number of online radio channels available.

Pandora and other online radio providers have become available on wireless audio transmitter and portable products by installing the appropriate app. This raises convenience and mobility of online radio. Mobility has to this point been the biggest plus of local radio.

AOL Radio utilizes CBS radio as its broadcasting platform. It comes with more than 200 music channels. Additionally it provides access to more than 150 local CBS radio stations. The underlying CBS radio platform "play.it" also allows listeners to create their own customized music channels. This is done by entering the names of albums, tracks or artists. The tracks played on each music channels can also be stored on an iPod for later playback by using 3-rd party tool iGetMusic.

Users can also create customized radio on other online music services by entering the artist and album names and these providers will play songs based on that information. Other services, on the other hand, fail to offer fully customized music channels.

Are conventional radio stations destined to become extinct by the continuous reduction of market share due to online radio? Online radio is especially useful for niche broadcasters who have been unable to broadcast due to the high price and licensing of frequency space.

Online radio broadcasters have found it hard to be profitable. The main cause is the huge number of competiting channels which is diluting listeners. At the same time, however, there is less pressure to insert commercials due to the lower expenses of broadcasting in comparison with traditional stations. This has made online radio content more interesting than terrestrial radio.

However, local radio has one big benefit over satellite and online radio. That is local content such as local news and events. Thus far the poor audio quality of FM radio has been a big downside. Nonetheless, newest digital radio broadcasts are set to enhance the audio quality. One of these technologies is HD radio. It is difficult to predict a clear winner in the battle between online and local radio because both offer their own exclusive content and high mobility which are the crucial factors that will decide the destiny of each service.

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The newest series of wireless audio transmitter devices promises streaming of music throughout the home without limits. We will investigate if these latest devices are suitable for whole-house audio. Also, we will give crucial guidelines for choosing a wireless audio system.

If your residence is not wired for audio then you face quite a challenge when you want to get your music from your living room to your bed room. Often the audio source cannot be moved. Running speaker wires between rooms will be costly and for that reason many people are searching for alternatives. Products which resolve this difficulty are mostly based on the following technologies: infrared wireless, RF wireless, wireless LAN or powerline.

Infrared products broadcast the audio as lightwaves. Light cannot go through walls. As a result products utilizing infrared, such as wireless surround sound kits, are limited to a single room.

RF wireless products broadcast the music as RF waves - either by using FM transmission or digital transmission - and can for that reason without difficulty transmit through walls. FM transmission is cheap but quite prone to noise, audio distortion and susceptible to interference.

Digital wireless audio transmitter devices, such as products from Amphony, make use of a digital protocol. The audio is first converted to digital data before being transmitted. This conversion and transmission in the digital domain will guarantee that the original audio quality is preserved. On the other hand, this is only the case of the data is sent uncompressed. Some wireless audio transmitters will apply some type of audio compression. Such products include Bluetooth audio transmitters. Audio compression will degrade the quality of the audio to some degree.

Wireless LAN (WLAN) products are useful when streaming from a PC but will add some amount of latency or delay to the signal since wireless LAN was not originally designed for real-time audio streaming. WLAN receivers often do not have built-in network access. As a result, such devices frequently require buying separate LAN cards. These cards are then plugged into every receiver.

Powerline products utilize the power mains to distribute audio and provide large range but run into problems if there are separate mains circuits in the house in terms of crossing between circuits. Powerline products have another problem in the form of power surges and spikes which can cause transmission errors. To prevent audio dropouts, these products will generally have an audio latency of several seconds as a safeguard.

Now we'll give you some pointers for shopping for a wireless system: Pick a system that supports numerous wireless receivers if you plan to stream audio to several rooms so that you don't have to buy a separate transmitter for every receiver. Some devices have some sort of error correction built in which will help guard against dropouts in case of strong wireless interference. Choose a digital RF audio transmitter to make sure that the audio quality is preserved. Make sure the audio delay is less than 10 ms if you have a real-time application such as video.

Pick a transmitter that has all of the audio inputs you require, e.g. speaker inputs, RCA inputs etc. Get a wireless system where you can purchase additional receivers later on. You should check that you can get receivers for all the different applications you have. Such receivers may include amplified receivers for passive speakers or line-level receivers for active speakers. Given that you may want to connect the transmitter to several sources, you should choose a transmitter that can be adjusted to different signal volume levels to prevent clipping of the audio signal inside the transmitter converter stage.

For high amplifier power efficiency and best sound quality, verify that the amplified receiver has a built-in low-distortion digital amplifier. Choose a system that offers receivers that can drive speakers with the preferred Ohm rating. Make sure the receivers have a small form factor and are easily mountable. This will help during the installation. Devices which function in the 5.8 GHz frequency band will have less trouble with wireless interference than devices using the crowded 900 MHz or 2.4 GHz frequency band.

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Looking at recent audio amplifier products, one cannot help but be overwhelmed by the number of technologies and models. I will clarify some fundamental amplifier vocabulary and help you pick the right type regardless of what your specific use may be.

Audio amplifiers are indispensable because your audio source such as your DVD or Blu-Ray player does not provide a signal powerful sufficient to drive your speakers. The amplifier will be the bridging element to your loudspeakers. It will convert the weak source signal to a signal powerful sufficient to drive your speakers.

Some audio sources such as surround-sound receivers already come with a built-in audio amplifier. Utilizing a separate amplifier, however, offers some advantages. One benefit is possessing more flexibility and being able to pick an amplifier that is best suited to drive a particular speaker. There are some mini amplifier models available. These types are small sufficient to conceal almost everywhere.

Many people will look at amplifier wattage first when picking an amplifier. Output wattage is the level of power the amplifier is capable to deliver to the speakers. Driving low-sensitivity speakers (sensitivity is shown in dB/W) calls for fairly high wattage. Moreover, driving outdoor speakers or speakers in a large room will require higher amplifier power. However, be cautious not to overdrive your speakers. This can damage your speakers beyond repair.

Yet, amplifier wattage is not everything. Good sound quality is perhaps more important than raw power. A 20 to 50 Watt amp ought to be sufficient for most real-world applications.

There are two conventions for specifying amplifier wattage. The first one specifies how much power the amplifier is able to deliver continuously. That figure is often called rms or continuous power. The second number is referred to as peak or maximum power and tells how much the amp can deliver for small bursts. Typically you should pick an amplifier based on rms power. However, make certain that the amplifier has adequate headroom or peak power to avoid clipping of music signals.

There are other parameters that are more important than wattage when selecting an amplifier. One significant parameter is referred to as total harmonic distortion or THD in short. No amplifier is ideal. There will be some amount of signal distortion which is created by the amplifier. The amount of distortion is expressed in percent or dB. The level of distortion varies between amplifier types. A smaller distortion means higher audio quality. The amount of distortion will be less than 0.05% for a high-quality amplifier. Consumer type amplifiers have higher distortion figures. Typical figures are up to 10% depending on the output power.

Another figure related to audio quality is known as signal-to-noise ratio and describes the amount of unwanted noise the amplifier will add to the signal. Consumer-grade amps will have a signal-to-noise ratio (SNR) of at least 80 dB. Higher-end amps will have an SNR of 100 dB or more. Audiophile amps will have an SNR of close to 120 dB.

Most of today's amplifiers are so-called Class-D amplifiers which means that they have higher power efficiency than Class-A or Class-AB amplifiers and for that reason waste little power as heat. Some of today’s mini amplifiers are no larger than a deck of cards. Though, when selecting a Class-D (digital) amplifier, be certain that the amplifier has low distortion and a high signal-to-noise ratio.

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Setting up multi-channel audio like a home theater system has always been rather complicated and manufacturers lately have developed unique products and technologies like wireless speaker kit products or virtual surround sound to help simplify this procedure. I will take a look at some of the products and technologies that have emerged and give some advice about choosing appropriate components for a hassle-free installation.

Many of recent TVs will be installed as a multi-channel audio system. Whereas traditionally TVs would contain built-in stereo loudspeakers, nowadays a number of external loudspeakers are used to let the viewer experience surround sound. The most commonly used 5.1 surround sound format requires installing a total of 6 speakers. These are one center speaker, two front side speakers, two rear speakers and a subwoofer. The newer 7.1 standard raises this number to 8 by adding two extra side speakers.

Therefore installing a home theater has become fairly hard and long speaker wire runs are normally undesirable for aesthetic reasons. Vendors have recently released new devices and technologies. These products were designed to help simplify the setup of home theater kits.

The first method is called virtual surround sound. This approach will take the audio components which would typically be sent by the remote speakers. It then utilizes signal processing to those components and inserts special cues and phase delays. Next these components are mixed with the front speaker sound. The signal processing is engineered according to how the human hearing determines the location of a sound. The audio signal is then broadcast through the front loudspeakers. The viewer is in effect tricked into assuming the sound is originating from a location other than the front speakers.

Virtual surround eliminates the remote loudspeakers and simplifies the setup and also avoids long speaker cord runs. On the other hand, it also has a drawback. The shape of each human's ear is somewhat dissimilar. As a result everybody processes sound differently. The signal processing of these virtual surround systems is based on a standard model which was measured with a standard ear. However, virtual surround will not function equally well for every human.

An alternative method for simplifying home theater installations and eliminating long speaker cable runs is to employ wireless surround sound kits or wireless loudspeakers. A wireless solution will usually include a transmitter component that connects to the TV or source in addition to wireless amplifiers that will be connected to the remote loudspeakers. This transmitter will typically come with line-level in addition to amplified speaker inputs. Ideally it should come with a volume control to adjust it to the audio source.

A number of wireless speaker products are designed to connect 2 loudspeakers per wireless amplifier. A better solution would have a wireless amplifier for every remote loudspeaker to eliminate the cord runs between each of the 2 remote speakers. The most advanced wireless products use digital transmission to avoid signal degradation. To make sure that all loudspeakers are in sync in a multi-channel application, make certain that you choose a wireless system that has an audio latency of just a few milliseconds at most. Otherwise there will be a noticeable echo type effect. Most wireless gadgets operate in the 900 MHz and 2.4 GHz frequency bands. A number of products use the less crowded 5.8 GHz frequency band and as a result have less competition from other wireless gadgets.

An alternative method, which is often named sound bars utilizes side-reflecting speakers. The sound that would ordinarily be broadcast by the remote loudspeakers is instead broadcast by loudspeakers at the front. These front loudspeakers broadcast the audio at an angle. Then the audio is reflected by the side and rear walls and appears to be coming from besides or behind the viewer. The result heavily is dependent upon the interior, especially the shape of the room and the decoration. It will work well for square rooms with no obstacles and sound reflecting walls. However, realistic scenarios frequently will differ from this ideal and reduce the result of this solution.

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A large number of wireless audio transmitter products have emerged over the years. They promise to cut the cables to your audio equipment. Can these products make good on their promise to eliminate the cable clutter? What influence has changing technology had on their performance?

Wireless transmission of music has begun with the launch of commercial radio broadcasts several decades ago. While still being popular now, FM radio is now being replaced by recent technologies such as HD radio, satellite radio and DAB broadcasts. Today a variety of consumer devices exist such as wireless microphones, wireless surround sound kits, Bluetooth audio transmitters, baby monitors etc which cut the cord by transmitting audio wirelessly.

Many houses which are not wired for audio are ideal for using wireless audio to distribute music throughout the home. Not every technology is perfect when it comes to wireless audio as we will find out.

Let’s look at the most traditional technology first: FM broadcasts. FM audio transmitters send the audio by employing a high-frequency signal which is continuously changing in frequency according to the audio signal. The technology, which is known as frequency modulation (FM), is fairly straightforward and cost-effective to build and offers high range. Most of today's wireless consumer devices utilize FM transmission. FM, however, has serious disadvantages in comparison with new technologies.

The FM signal will pick up static. Therefore there will be noticeable background noise. The amount of static will depend on the position of the transmitter and radio. The reason for the varying quality is a phenomenon known as multipath fading which is a result of reflected radio waves cancelling each other out. Using two antennae is one method some devices utilize to cope with this problem (diversity receivers). In addition, FM transmissions will easily pick up interference from other wireless products.

Bluetooth based audio transmitters have gained popularity recently. Bluetooth is a common wireless protocol which was designed primarily as an interface between computer peripheral products. Before the signal is sent, Bluetooth transmitters will convert the audio into a digital format. One of the advantages is the high robustness against wireless interference. On the other hand, Bluetooth was not designed for audio transmissions. As a result is does have several problems. The first disadvantage is the limited range which typically would be 30 ft or less. The second drawback is the fact that Bluetooth does not have enough space to transmit CD-quality audio and as a result the audio is compressed first. As a result of the audio compression, the audio quality will decrease. Another drawback is that Bluetooth will introduce a delay or latency to the signal during the transmission. This delay is a particular drawback for video and surround sound applications. In these applications the sound from the wireless speakers would be out of sync with the video and remaining speakers.

Terrestrial digital and satellite radio technologies offer high range but use extensive audio compression and have an audio delay of up to several seconds.

Another technology transmits the audio signal without compression digitally. This technology is used in wireless audio transmitters from Amphony. By avoiding audio compression, the signal will preserve the original quality. The audio latency of these products is smaller than 1 ms and therefore this technology is also used in wireless speaker kits for home theater setups.

To be robust against interference from other wireless products, this technology uses forward error correction. This mechanism can repair errors during the transmission. Amphony products use the 5.8 GHz frequency band which is less crowded than the 900 MHz and 2.4 GHz bands. The result is high reliability. In contrast to Bluetooth, any number of wireless receivers can operate from a single wireless audio transmitter which is a concern when distributing audio to several rooms within a residence.

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Dish Network has been intensely busy rolling out lots of great new features for its subscribers. Naturally, this high quality Sky TV company has always offered great services so as to supply the best entertainment at the best value. However , it has recently replenished its dedication to delivering the best technology to its customers by accelerating the number of HDTV channels that Dish Network offers while accelerating the maximum resolution that this service can provide! Just look at dishnetworks deals!

With the recent roll out of seventeen new HDTV channels, Dish Network is establishing its level of commitment to giving its patrons the best TV possible and dishnetworks deals! Not only will this move boost the total number of nationwide HDTV channels to well over one hundred, and it makes Dish Network the leader when it comes to offering the most countrywide high def channels! A couple of the new national HDTV channels offered include HBO Signature HD, HBO Latino HD, Starz children & Family HD, college Sports HD, Lifetime motion picture Network HD, ActionMax HD, Encore HD, and Green Planet HD.

The other big news for Dish Network is that it has become the 1st television service provider to supply high def content in 1080p resolution! Till now HDTV through TV service suppliers was only available in 720p and 1080i resolutions. The resolution of 1080p had only been available from high def DVD's and video game kit that could produce graphics of that resolution. Now though, it is of course possible to get this superior level of resolution from TV content, implying that the high def picture from Dish Network is even better without the annoying visible defects that can crop up with an interlaced picture!

Dishnetworks deals is making its HDTV offerings much more complete by providing customers with a variety of all HD programming packages to choose between with its TurboHD line of packages! This is a step towards the future because we are able to be reasonably sure that at some particular point all television will be in the HDTV format just as just about all television is color TV now!

Naturally Dish Network still offers all the standard def programming that it ever did! If you haven't made the upgrade to an HDTV set you can still enjoy great programming in the shape of the standard def channels that you know and love. You'll still be able to subscribe to any of America's Top Entertainment Packages : Americas Top a hundred, America's Top two hundred, and America's Top 250! You can also still opt for America's Everything Pack in order to get the most all-embracing choice of standard def channels now available! You may check out dishnetworks deals. In addition, the smaller packages are terrifically customizable with the ability to pick and choose the extra features that you would like such as additional sports programming, premium movie channels, adult channels, and international channels so that you can get the exact choice of TV that you need!

Another really helpful optional feature that you can get from Dish Network Packages is a DVR! With the ability to record television at any time of the day or night, without your supervision, a dvr is actually an asset to your television enjoyment! The undeniable fact that you can have the device recording off more than one channel at the same time and pause and rewind live TV, makes the recording device even better!

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Are you overwhelmed by the flood of regular and wireless headphones? You never heard of the terms open and closed headphones or dynamic and static transducers? This overview will help you select the perfect model.

Headphones are available in many different styles. In terms of design, the smallest type headphones are in-ear headphones which are plugged into the ear, some of these have a bracket that wraps around the ear. These in-ear headphones are often bundled with iPods and other MP3 players and can easily be placed in a pocket. The next size up are lightweight headphones that sit on the ear and are connected by an elastic frame. This headpiece either sits on top of the head or wraps around the neck. If you are on a tight budget then you should consider one of these headphones, some models are designed to absorb external noise.

If you are looking for better sound quality then you should take a look at medium-end headphones which have soft ear cushions that depending on the model will be located either on your ear or around your ear. The second design eliminates the pressure on the ears and is preferred by many people. The next decision you'll have to make is between an open and closed headphone design. An open design essentially means that the sound from the transducer can penetrate to the outside of the headphones. It can also cross-couple into the other earpiece. While some people feel that an open design sounds light, a closed design will tend to absorb exterior noise more and provide better insulation between the two earpieces.

The majority of today's headphones are dynamic which refers to the type of transducer that is used. Static headphones are the second type. This type is fairly expensive but offers high sound quality. Static headphones need a special headphone amplifier.

Wireless headphones are another option which eliminate the headphone cord. Bluetooth headphones are one type of wireless headphones and work with Bluetooth-enabled devices and cell phones. The operating range is typically only 30 ft or less. Bluetooth headphones do normally not offer audiophile sound quality.

Other wireless headphones include FM type models which normally work at 900 MHz and digital wireless headphones which work at 2.4 GHz or 5.8 GHz. FM type models are the least expensive option of wireless headphones. In addition to noticeable hissing and distortion, FM type wireless headphones are also very susceptible to wireless interference.

Another type of wireless headphones are digital wireless headphones. This type of headphones, such as Amphony headphones, will encode the audio prior to transmission which prevents any audio distortion during the transmission and ensures high reliability against interference. Some digital wireless headphones work at the less crowded 5.8 GHz frequency band. This band offers less competition from other wireless devices compared to the 2.4 GHz band.

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