Just How Much Distortion Do Cordless Speaker Systems Have?

Are you looking to get a couple of wireless outdoor speakers highlighted at amphony.com/products/wireless-speaker.htm? You might be bewildered by all of the technical jargon used by manufacturers in order to describe the quality of their products. I will highlight a regularly utilized term that, however, ist often misunderstood: “total harmonic distortion” or “THD”.

It is often tricky to select a suitable set of wireless loudspeakers given the huge number of models. Aside from looks, you will often be faced with having to review a few of the technical specifications. THD is typically not as easily understood as several other commonly used specs including “signal-to-noise ratio” or “frequency response”. In short, “harmonic distortion” describes how much the audio signal is being deteriorated as a result of the speaker or in other words how much the signal deviates from the original signal. There are 2 common ways in order to express harmonic distortion, either in percent (%) or in decibel (dB). If a speaker states a distortion of 10% for example then one tenth of the energy radiated by the speaker is distortion. A distortion of 10% can also be shown as -20 dB. 1% distortion is equal to -40dB. A wireless loudspeaker really has numerous components which add to harmonic distortion. One of those is the built-in power amp. This power amplifier is driving the speaker element. The amplifier itself will have a specific level of distortion. Normally the distortion of the amplifier will be bigger the more output power it supplies to the speaker. In general makers will show amp distortion depending on a specific level of output power, by and large a lot less than the rated maximum amplifier output power.

Having amplifier distortion specifications for a few output power levels provides a better indication of the amplifier distortion performance.Harmonic distortion measurements are typically done via feeding a test tone into the speaker. This tone is a pure sine wave signal with minimum distortion. The frequency of this test tone is typically 1 kHz. However, amplifier distortion is going to generally increase with rising frequency, particularly in digital class-D models.

The second contributing factor is the loudspeaker element itself. The majority of speakers use a diaphragm kind driver that is driven by a coil that is suspended in a magnetic field. The coil is moving in accordance to the variation in the magnetic field that is excited by the audio signal but does not correlate fully with the signal as a result of core losses along with various factors. As such the result is distortion brought about by the speaker element. A lot of suppliers will show harmonic distortion depending on the power level as typically the higher the speaker is driven the higher the level of distortion. The overall loudspeaker distortion is as a result brought about by the amplifier and the speaker element and in addition by a series of further contributing factors. The enclosure of the speaker is going to vibrate to some extent depending on the sound pressure level. These vibrations are going to also be non-linear in nature and add to distortion. The total distortion of the loudspeaker is generally determined by a measurement which consists of a low-distortion audio generator as well as a microphone that is attached to an audio analyzer. The audio analyzer will determine the amount of higher harmonics and compare these with the main signal in order to compute the distortion. Intermodulation distortion analysis is another technique which gives a better picture of the loudspeaker distortion performance with real-world signals by utilizing a test signal with 2 harmonics and measuring how many harmonics at other frequencies are produced by the loudspeaker.

One more factor adding to distortion is the audio transmission of wireless speakers, particularly with products which broadcast an analog signal at 900 MHz. More sophisticated models use digital audio transmission. Typically these transmitters operate at 2.4 GHz or 5.8 GHz.

A Brief Overview Of Power Amps

Requirements concerning audio power and audio fidelity of today’s loudspeakers and home theater products are constantly growing. At the core of these systems is the power amp. Recent power amplifiers have to perform well enough to satisfy those ever increasing requirements. With the ever increasing amount of models and design topologies, such as “tube amps”, “class-A”, “class-D” as well as “t amplifier” types, it is getting more and more complex to pick the amplifier that is best for a specific application. This article is going to explain a few of the most widespread terms and spell out a few of the technical jargon which amp producers frequently employ. Simply put, the principle of an audio amp is to translate a low-power music signal into a high-power audio signal. The high-power signal is great enough to drive a speaker adequately loud. To do that, an amplifier makes use of one or several elements that are controlled by the low-power signal in order to make a large-power signal. Those elements range from tubes, bipolar transistors to FET transistors.

Tube amps used to be widespread a few decades ago. A tube is able to control the current flow in accordance to a control voltage which is connected to the tube. One dilemma with tubes is that they are not extremely linear when amplifying signals. Aside from the original music, there are going to be overtones or higher harmonics present in the amplified signal. Thus tube amplifiers have rather high distortion. On the other hand, this characteristic of tube amplifiers still makes these popular. Many people describe tube amps as having a warm sound as opposed to the cold sound of solid state amps. Another downside of tube amplifiers, however, is the low power efficiency. The majority of power that tube amps use up is being dissipated as heat and only a part is being transformed into audio power. Yet an additional drawback is the high price tag of tubes. This has put tube amps out of the ballpark for many consumer products. As a result, the majority of audio products today makes use of solid state amps. I will describe solid state amps in the following paragraphs. Solid state amplifiers replace the tube with semiconductor elements, typically bipolar transistors or FETs. The earliest kind of solid-state amplifiers is generally known as class-A amplifiers. In a class-A amp, the signal is being amplified by a transistor which is controlled by the low-level audio signal. Class-A amps have the lowest distortion and typically also the smallest amount of noise of any amplifier architecture. If you require ultra-low distortion then you should take a closer look at class-A types. The major drawback is that much like tube amps class A amplifiers have extremely small efficiency. As a result these amplifiers require large heat sinks to radiate the wasted energy and are frequently rather heavy. To improve on the small efficiency of class-A amplifiers, class-AB amps utilize a number of transistors that each amplify a distinct area, each of which being more efficient than class-A amps. The higher efficiency of class-AB amplifiers also has two further advantages. First of all, the required number of heat sinking is reduced. As a result class-AB amps can be manufactured lighter and smaller. For that reason, class-AB amps can be made cheaper than class-A amplifiers. When the signal transitions between the two separate regions, though, some amount of distortion is being generated, thereby class-AB amplifiers will not achieve the same audio fidelity as class-A amps.

Class-D amps are able to attain power efficiencies above 90% by using a switching transistor which is constantly being switched on and off and thereby the transistor itself does not dissipate any heat. The switching transistor, which is being controlled by a pulse-width modulator generates a high-frequency switching component that has to be removed from the amplified signal by making use of a lowpass filter. The switching transistor and also the pulse-width modulator typically have fairly large non-linearities. As a consequence, the amplified signal is going to contain some distortion. Class-D amps by nature exhibit larger audio distortion than other types of small stereo amplifiers.

To solve the dilemma of large audio distortion, modern switching amplifier designs incorporate feedback. The amplified signal is compared with the original low-level signal and errors are corrected. “Class-T” amps (also called “t-amp”) utilize this type of feedback method and therefore can be made very small whilst attaining small music distortion.

Find Out How To Transmit Music To Bluetooth Audio Receivers

Present day cellular phones make it possible for you to store and watch movies and audio. Usually you’d listen to the tracks kept on your mobile phone by employing a pair of earbuds. Still, the audio quality of earphones provided with cellular phones often is fairly bad. Many stereo speakers deliver much better sound quality as compared to tiny earbuds. By connecting your cell phone to a pair of active loudspeakers, you may enrich the listening experience. Hooking up your stereo speakers to a cellular phone by using a cord is frequently not appealing. You can actually trip over the cord and the phone is connected to the loudspeakers. Here I’m going to examine a number of cordless alternate options for sending your tracks to some speakers.

Loudspeakers can be a great alternative to headphones which can come with your mobile phone. They possess far better sound quality and you are no longer tethered to your smartphone. Connecting your mobile phone to some loudspeakers may be achieved in several ways. I am primarily emphasizing cordless solutions considering that you are not looking for the mobile phone to be tethered to your speakers. Among the most common possibilities intended for streaming music to a pair of loudspeakers are Bluetooth audio receivers. Bluetooth is recognized by the majority of of modern smartphones. Bluetooth audio receivers can pick up the songs that is streamed from the cell phone plus convert the wireless signal back to audio. Almost all of the latest receivers understand the common standards A2DP and AptX. A2DP is certainly the most widely used standard to stream songs via Bluetooth whereas AptX is just recognized by the newest generation of cellular phones.

You’ll be able to hook up Bluetooth music receivers to any kind of active loudspeakers. However, many stereo speakers out there happen to be passive. To connect to a passive loudspeaker you will need to make use of an external power amplifier. Integrated Bluetooth wireless amps, on the other hand, don’t need an external power amp. Regrettably, the wireless range of Bluetooth is fairly limited. Generally you won’t be able to transmit in excess of 30 ft. What this means is you are tied to a single room. The working range may change dependant upon your environment plus the amount of wireless interference. Bluetooth is actually understood by many devices apart from mobile phones. Should you wish to send music from a PC, for example, you can additionally utilize a wireless audio receiver.

An additional option is Airplay. Airplay is an Apple proprietary format which makes it possible for transmitting of uncompressed tracks. However, remember the fact that the songs located on your cell phone is usually compressed via the MP3 or AAC standard and consequently using Airplay is not going to improve the sound quality. If however you have got uncompressed music available then employing Airplay makes a lot of sense. AptX is a compromise between the widespread A2DP protocol and Airplay. A lot of older smartphones, though, usually do not yet support AptX.

A different choice for sending tunes from your phone are Bluetooth wireless loudspeakers. Considering the fact that Bluetooth loudspeakers generally do not provide similar audio quality as some other stereo speakers, it is always a great idea to give them a try before your purchase. To achieve the highest audio quality, using a separate Bluetooth music receiver is therefore a good idea. You may select any speaker which you like. If you favor portability and opt for a Bluetooth speaker, check that it works with your particular mobile phone first.

A Brief Overview Of Music Amplifiers

Music amplifiers are at the very center of each home theater product. As the quality and output power demands of today’s speakers increase, so do the requirements of power amplifiers. It is tough to choose an amplifier given the large number of models and concepts. I will explain some of the most popular amplifier designs including “tube amplifiers”, “linear amplifiers”, “class-AB” and “class-D” as well as “class-T amplifiers” to help you comprehend some of the terms commonly utilized by amp manufacturers. This article should also help you figure out what topology is best for your specific application.

The basic operating principle of an audio amp is quite clear-cut. An audio amplifier will take a low-level audio signal. This signal usually originates from a source with a fairly large impedance. It subsequently translates this signal into a large-level signal. This large-level signal can also drive speakers with low impedance. Determined by the kind of amplifier, one of several kinds of elements are utilized in order to amplify the signal including tubes and transistors. Tube amplifiers used to be popular a couple of decades ago. A tube is able to control the current flow according to a control voltage which is attached to the tube. Sadly, tube amps have a somewhat high amount of distortion. Technically speaking, tube amps will introduce higher harmonics into the signal. These days, tube amplifiers still have a lot of fans. The primary reason is that the distortion which tubes bring about are often perceived as “warm” or “pleasant”. Solid state amplifiers with small distortion, on the other hand, are perceived as “cold”.

Moreover, tube amps have quite small power efficiency and consequently radiate a lot of power as heat. Moreover, tubes are rather expensive to manufacture. As a result tube amplifiers have mostly been replaced by solid-state amplifiers which I am going to look at next.

Solid-state amps use a semiconductor element, like a bipolar transistor or FET instead of the tube and the earliest kind is known as “class-A” amps. The working principle of class-A amplifiers is very similar to that of tube amps. The key difference is that a transistor is being utilized rather than the tube for amplifying the music signal. The amplified high-level signal is sometimes fed back in order to reduce harmonic distortion. In terms of harmonic distortion, class-A amps rank highest amongst all kinds of power amplifiers. These amplifiers also regularly exhibit quite low noise. As such class-A amps are ideal for very demanding applications in which low distortion and low noise are crucial. Though, similar to tube amps, class-A amplifiers have quite low power efficiency and most of the energy is wasted.

In order to improve on the small efficiency of class-A amps, class-AB amps employ a number of transistors which each amplify a distinct area, each of which being more efficient than class-A amps. As such, class-AB amps are typically smaller than class-A amplifiers. Though, this topology adds some non-linearity or distortion in the region where the signal switches between those areas. As such class-AB amps usually have higher distortion than class-A amps. Class-D amps improve on the efficiency of class-AB amplifiers even further by using a switching transistor that is constantly being switched on or off. Thereby this switching stage barely dissipates any energy and consequently the power efficiency of class-D amps usually surpasses 90%. The switching transistor, that is being controlled by a pulse-width modulator generates a high-frequency switching component which needs to be removed from the amplified signal by using a lowpass filter. The switching transistor and also the pulse-width modulator generally exhibit quite big non-linearities. As a result, the amplified signal will have some distortion. Class-D amps by nature have larger audio distortion than other kinds of audio amps.

Newer amps incorporate internal audio feedback in order to minimize the level of music distortion. One type of mini audio amplifiers that employs this type of feedback is known as “class-T” or “t amplifier”. Class-T amplifiers feed back the high-level switching signal to the audio signal processor for comparison. These amplifiers exhibit small music distortion and can be made extremely small.

Advice For Purchasing Wireless Speakers

A constantly growing quantity of wireless gadgets including bluetooth loudspeakers produces growing competition for the precious frequency space. I’ll evaluate several systems which are employed by modern electronic sound gadgets to determine how well these products may operate in a real-world environment.

The buzz of wireless devices just like wireless speakers is responsible for a rapid rise of transmitters that transmit in the most popular frequency bands of 900 MHz, 2.4 GHz and 5.8 GHz and therefore cordless interference has turned into a significant concern.

The cheapest transmitters normally broadcast at 900 MHz. They operate just like FM radios. Because the FM transmission uses a small bandwidth and thereby just consumes a tiny part of the available frequency space, interference may be eliminated simply by changing to a new channel. Current sound gadgets utilize digital audio transmission and in most cases work at 2.4 Gigahertz. Such digital transmitters broadcast a signal that takes up far more frequency space than 900 MHz transmitters and thus have a greater potential for colliding with other transmitters.

Frequency hopping systems, however, are going to still create problems given that they are going to disrupt even transmitters using transmit channels. Real-time audio has very rigid demands regarding reliability and low latency. In order to provide those, different means are needed.

A frequently employed method is forward error correction in which the transmitter sends extra information with the sound. The receiver employs an algorithm which uses the extra data. In the event the signal is corrupted during the transmission resulting from interference, the receiver may filter out the erroneous information and recover the original signal. This method will work if the level of interference doesn’t go above a certain threshold. Transmitters using FEC may transmit to a huge amount of cordless receivers and does not require any feedback from the receiver. A different approach makes use of receivers which transmit information packets to the transmitter. The information which is broadcast includes a checksum. Because of this checksum the receiver may see whether any certain packet was received properly and acknowledge. If a packet was corrupted, the receiver is going to alert the transmitter and ask for retransmission of the packet. Consequently, the transmitter has to store a certain amount of packets in a buffer. Likewise, the receiver will need to maintain a data buffer. Employing buffers causes a delay or latency in the transmission. The amount of the delay is proportional to the buffer size. A larger buffer size increases the dependability of the transmission. Having said that a large buffer will lead to a large latency which can result in difficulties with speakers not being in sync with the movie. Products which integrate this particular procedure, however, are limited to transmitting to a small number of receivers and the receivers consume more power.

In order to avoid crowded frequency channels, several wireless speakers watch clear channels and may switch to a clean channel when the current channel gets occupied by another transmitter. The clean channel is chosen from a list of channels which has been determined to be clear. One technique which utilizes this particular transmission protocol is called adaptive frequency hopping spread spectrum or AFHSS

Why Do Wireless Speakers Make Use Of Of Adaptive Frequency Hopping?

Adding a few outdoor wireless rock speakers in your own home is generally fairly uncomplicated. Still, open-air setups will be considerably more complicated. That is mainly as a result of the number of complications which exist out of doors. Nonetheless, through deciding on the proper type of speakers and by taking the proper steps that I will showcase inside this report, it is possible to assure dependable function out of doors.

It is pretty simple to put in some speakers within your residence. Nevertheless, why not add in some music to your next out-of-doors get together? Unfortunately, adding speakers outdoors is actually far more challenging. Some of the most common difficulties which outdoor stereo speakers have to deal with while being used outdoors are rain, moisture and snowfall.

Whenever picking loudspeakers, take into account the fact that these obstacles exist. In order to stand up to rainwater, the speaker enclosure needs to be manufactured from a material that can deal with moisture. The enclosure of the loudspeaker ought to be produced from an appropriate material. This material needs to be able to withstand rainwater. The most common types of bluetooth wireless speakers that are intended for use outside the house have got a housing which is produced out of PVC or ABS plastic. In addition to the housing material being water-proof, the spaces between various pieces of the speaker enclosure need to be properly handled in order to prevent water from sneaking inside the speaker. Usually, manufacturers of wireless tv speakers will add some elastic material or some wax into any spaces and also cracks to make the enclosure water-proof.

Many active speakers which were developed for out-of-doors now have some control parts for example volume knobs or even channel select switches. These kinds of controls need to be guarded from water. Sun rays will quickly discolor the housing of wireless outdoor rock speakers. A number of producers for that reason employ a protective coating. Sun light also poses a difficulty due to the fact it may generate incredibly high temperature ranges. Direct sunlight may in fact elevate the temperature high enough for the material to deform. In severe instances, the housing will be able to melt. Consequently, the speaker enclosure should be produced out of a high-temperature material.

Most models of wireless speakers for computers which were created for use in the open air already have the right protections in order to be in a position to stand up to rain. When you do not wish to spend the additional cash in order to order speakers which possess the right protections, then you may make use of any model of cordless speakers and simply take them back inside your home after every use.

Additionally, you can easily set up the speakers (You can find helpful info on the subject of cordless stereo speakers at http://www.amphony.com) underneath a roof overhang so that rainfall is unable to get to the speaker or you can build a defensive enclosure. You will be able to create this type of enclosure from a plastic container from which you remove the front so that the sound can be radiated by your speaker. The cover of the housing is going to work as the roof. Instead of providing a permanent opening in front of this housing, you may add a lid that can be closed when the loudspeaker is left outdoors in the course of the winter season. Discover more reading at http://www.7dayshop.com/7dayshop-300mbps-wifi-repeater-wireless-range-extender-2t2r.

A Number Of Methods For Wireless Speakers In Order To Guarantee Robust Transmission

Selecting the perfect model of wireless speakers is hard while faced with a large number of different technical jargon and specs, for example “sound pressure level”, “output wattage” etc. You might not even fully comprehend the most basic of these terms, for example “speaker output wattage”. In this commentary, I will have a closer look at one of the most fundamental of these terms: “speaker output power”. This term is also recognized as “speaker wattage”.

Speaker specifications are now and then tricky to interpret because they are not completely standardized. Thus it might be tricky to figure out the actual performance of the speaker just by looking at the specifications. A decent method though is to do a listening test prior to buying your speaker. During this test you ideally wish to set up the speakers in a comparable setting as your application. Let me now proceed and explain the wattage specification of speakers.

The power of the speakers is given as “wattage”. This describes how loud your loudspeaker can sound. If you have a small room then you don’t need much more than a few watts. If you wish to set up loudspeakers in the open or in a live show then you will need a few hundred watts of power. For superior music quality, you might wish to go with a speaker which has bigger power than you require since many loudspeakers will show increasing distortion as the audio power goes up. Power is either specified as “Watts peak” which means the speaker can endure short burst of this amount of wattage or “Watts rms” which shows how much power the speaker can endure for a longer period of time. In the past, vendors have usually favored listing the “peak power”. This figure is bigger than the average or “rms” power. However, “peak power” can frequently be misleading since there is no norm stating the amount of time that the loudspeaker has to be able to endure this amount of power.

Nowadays the majority of speakers is going to state rms power which provides a better indication of the speakers’ true performance. Though, please ensure that your loudspeaker has adequate headroom to steer clear of clipping of the audio. The main reason is that music signals are going to show brief peaks of large power that the loudspeaker has to handle. Rms power is measured with a constant sine signal that hardly compares with a music signal regarding the power envelope.

Typically the impedance of the loudspeakers which you connect to your power amplifier will determine how much output power your amp can deliver. Loudspeaker impedance is measured in Ohms. Typically speakers (Go to this site to come across useful info on wireless powered speakers) have an impedance between 4 and 8 Ohms. Amplifiers have a restricted output voltage swing because of the fixed internal supply voltage. As such the highest output wattage of your amp will differ depending on the speaker impedance. The lower the speaker impedance the higher the maximum power your amplifier can deliver. Frequently maximum power is specified for a 4-Ohm loudspeaker impedance. On the other hand, ideally the manufacturer of your audio amplifier will tell which loudspeaker impedance the amplifier can drive. Please note that a number of amps cannot drive speakers with very small speaker impedance. Additionally, take a look at http://www.microcenter.com/search/search_results.aspx?N=4294964306&cat=Wireless-Speakers–:-Home-Theater–:-Electronics–:- to get more details.

The Things You Must Know About Cell Phones

If you are unfamiliar with cell phones, and do not know how to get the most from them, you will have trouble keeping up. Therefore, it is important to educate yourself. And you can start right here with this article.

Be sure to restart your cellphone here and there to dispose of stored program memory from things like Facebook and Twitter. In this way, you will be able to get the best performance from your phone.

Be careful if you watch videos while using LTE or 4G. Your monthly plan likely has data limits. Video can quickly go through the allowance and charge you more quickly. If this is a problem for you, consider switching to a different plan tailored to your needs.

Don’t watch video too much if you have an LTE or 4G signal. Your data allowance won’t be very high. Video eats up this allowance rapidly, and you could rack up additional charges if you exceed it. If this happens consistently, look into getting a different plan.

If you have a smartphone, you most likely use it quite often throughout the day. However, remember to turn it off every now and again. They’re just like computers. Restarting the phone helps to keep the memory free and operating well. You will see a glaring difference immediately.

The longer you own your smartphone, the more it will slow down. This means that it may become more difficult to perform updates to your phone as time passes. As a result, the time may come when you have to choose what you want to do. You can keep things the way they are, or decide to pursue an upgrade.

When it comes time to buy a new cell phone, take your time and do some comparison shopping in actual brick-and-mortar stores. Invest some time playing with the cell phones and testing them. You will almost always find one that you love.

Look to your friends for their opinions and advice on cell phones. You can usually put faith in their advice and their experiences can help you avoid similar mistakes they may have made. They may be able to help you choose a phone that works best for you, which can make shopping easier.

Ask your loved ones and friends about cell phones before buying one. They will give you their unbiased opinion, and between all of them, they should be a wealth of knowledge. They can assist you in determining which phone to buy, and it makes it simpler for you to shop when you are armed with knowledge.

A case might not be necessary if you have one of the latest phones. Designers of smartphones are using Kevlar, carbon and other hard materials to make the cell phones (see this web site to come across additional infos in relation to metro pcs cell phones) stronger. A case will protect the glass, but can make the phone hard to use. Know which choice is best for you, but make sure you base it off the type of cell phone you have.

Playing mobile games can cure boredom and add some much needed excitement to your day. You’d be surprised at the quality of the games out there for cell phones. Don’t overburden your phone with too many games, since this can eat up your memory.

No matter how little you knew about cell phones previously, having read this article, you now have an idea of where to turn and what to do. It’s your choice if you want to make full use of it. These tips can help you achieve another level of satisfaction with your phone. Nothing can be worse than if you have a phone that isn’t fun to use.