Can Rock Outdoor Speakers Produce CD-Quality Audio?

Have you ever asked what some of the technical language means that vendors use in order to show the performance of wireless loudspeakers? In this editorial, I will highlight a frequently used specification: THD or “total harmonic distortion”.

wireless speakers

Wireless loudspeakers are available in all different shapes and sizes. Selecting the right model may often be tough. I am going to shed some light on a commonly utilized term that is utilized in order to publish the technical performance of the speaker: “total harmonic distortion” or “THD”. THD is usually not as easily understood as a few other commonly utilized specs including “signal-to-noise ratio” or “frequency response”.

In brief, THD shows the difference between the audio that is produced by the speaker versus the audio signal with which the speaker is driven. The most widespread ways to show distortion are percent in addition to decibel. These two conventions can be translated into one another. The percentage given as THD shows which amount of energy which is radiated by the speaker are higher harmonics versus the original signal. 10% would mean that one 10th is distortion. 1% would mean one hundredth et cetera. 10% is equal to -20 dB while 1% equals -40 dB. On the other hand, be cautious as there are in fact several elements which bring about harmonic distortion. Wireless loudspeakers as well as any kind of active loudspeaker or active subwoofer all have built-in power amplifiers in order to drive the speaker element. The power amplifier itself is going to have a specific amount of distortion. Generally the distortion of the amp will be bigger the more output power it supplies to the loudspeaker. Customarily vendors will specify amplifier distortion based on a specific amount of power, by and large a lot less than the rated highest amplifier output power.

Having amp distortion specs for a few output power levels provides a better picture of the amplifier distortion performance.Harmonic distortion measurements are typically done via feeding a test tone into the speaker. This signal is a pure sine wave signal with minimum distortion. The frequency of this test tone is normally 1 kHz. Distortion, though, is usually dependent on the audio frequency. Most amplifiers will show rising distortion with rising frequency. Particularly digital class-D amplifiers will show fairly high distortion at frequencies above 5 kHz.

The second contributing factor is the loudspeaker element itself. The majority of speakers employ a diaphragm kind driver which is driven by a coil that is suspended in a magnetic field. The voicecoil will follow the magnetic field that is controlled by the music signal in order to move the diaphragm. Yet, this movement is not completely linear. As such the result is distortion caused by the speaker element. Most vendors will exhibit harmonic distortion depending on the audio level as typically the higher the speaker is driven the bigger the amount of distortion.

The total distortion of the speaker thus is the sum of the amp distortion as well as the loudspeaker element distortion. On top of that, there are different contributing factors. The enclosure of the speaker will 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.

In order to figure out the overall distortion of a loudspeaker, a signal generator is utilized which supplies an ultra-linear signal to the speaker and a measurement microphone which is attached to an audio analyzer in order to calculate the level of harmonics emitted by the loudspeaker. Then again, pure sine signals barely give an accurate indication of the distortion of the cordless loudspeaker with real-world signals. A better distortion analysis is the so-called intermodulation distortion analysis where a test tone which includes a number of sine waves is used. Then the number of harmonics at other frequencies is calculated.

Furthermore, please understand that most wireless speakers introduced at this link will experience audio distortion during the audio transmission itself. This is mostly the case for transmitters which utilize analog or FM type transmission. Digital audio transmission on the other hand provides the smallest level of signal distortion. The audio is digitized in the transmitter and not affected during the transmission itself. Digital wireless audio transmitters are available at 2.4 GHz as well as 5.8 GHz.


How To Make Sure That Your Cordless Speakers Are Going To Last

If you just got a home theater system or a pair of wireless speakers, you may require a few guidelines on properly setting it up if you don’t want to contract an installer. I will outline the fundamental setup procedure and offer some tips in order to help stay away from some widespread problems. Your home theater system will normally have 5 or seven speakers – 1 main speaker, two front speakers, 2 rears and 2 sides (in case of a 7.1 system) as well as a woofer. It also comes with a central component. This component is going to drive every one of your speakers. This central element is the central hub of your home theater system. You are going to typically be able to control it through remote control. It will process the sound and split it into the sound component for every separate loudspeaker.

wireless speakers

Select a place for the surround receiver. You might wish to place it where you have the largest amount of space. Then again, please also keep in mind that you will need to run speaker cable to every speaker, so do not choose a place which is too remote. Just be sure it is in a dry and safe place. Also, be certain that you can easily reach the receiver from your TV or DVD/Blue-ray player as you will need to connect those. Attaching the receiver to power and to your TV or Blue-ray player is pretty clear-cut. Most modern TVs have an optical output that connects directly to your receiver through a fiberoptical cord. This cable is generally included with your system. You may also get it a most electronics shops. After you have established the audio connection to your television set, you can now go ahead and attach your loudspeakers. This step demands a little bit more effort.

wireless speakers

If you have wireless rear loudspeakers you will not require as much speaker cord and the install is going to be somewhat simpler. First of all, calculate how much speaker cable you are going to require. You may wish to add some extra length for safety. In most cases, you will not be able to run the cord in a straight line to your loudspeakers. You might need to consider carpets, furniture etc. Therefore make certain you include all of these additional twists in your computation. If you are planning to drive a lot of output power to your speakers then make certain you choose a cable which is thick enough to handle the current flow. The majority of subwoofers are going to have a built-in power amplifier and thus accept a low-level music signal. You can attach your woofer by using a shielded RCA cable.

wireless speakers

Whilst connecting the loudspeaker cable, make certain that you attach the cord with the accurate polarity. Each loudspeaker has a color-coded terminal, normally red and black. Get a loudspeaker cord which is color coded in order to help ensure the correct polarity while connecting to the loudspeaker terminal. In the same manner, watch the right polarity while connecting the loudspeaker cable to your surround receiver in order to keep all of your loudspeakers in phase.

wireless speakers

Cordless loudspeakers usually need to do some amount of audio buffering throughout the transmission in order to deal with wireless interference. This results in a brief delay whilst the audio is transmitted. This delay is also known as latency and should be taken into consideration during your install. The amount of latency depends on the cordless system. It is usually less than 25 ms. For best sound, all of the loudspeakers should be in sync. If you have wireless rears then the audio is going to by somewhat out of sync with your remaining loudspeakers. To keep all loudspeakers in sync you will have to tweak the receiver in order to delay the signal going to your wired loudspeakers. Check the user manual in order to figure out how to set a delay on specific channels. Home theater systems which were not designed for wireless rear speakers might not come with this ability. In this case you may wish to look for a wireless speaker kit which has very low latency, ideally less than 1 ms. This will keep all of your loudspeakers in perfect sync.


Why It Is Good To Choose A Couple Of Efficient Cordless Loudspeakers

When you are about to buy brand new wireless speakers, you may well be asking yourself how efficiently your wireless loudspeakers operate. I’m going to explain exactly what the term “power efficiency” stands for plus why you must take a closer look at this figure in your selection of brand new cordless loudspeakers. The less efficient your wireless loudspeakers are, the more energy is going to be squandered which results in many difficulties: Low-efficiency wireless loudspeakers will waste some power as heat and so are costlier to use than high-efficiency products because of their greater energy utilization. To shield the circuit elements, low-efficiency wireless loudspeakers must find methods to remove the heat that’s produced. Generally more elements have to be added to dissipate enough energy and sustain the ideal operating temperature. These components usually are heat sinks and also fans. These heat sinks consume a reasonable amount of room and make the wireless speakers large and heavy. Further more, they raise the price of the wireless loudspeakers. Cordless speakers that have low efficiency can’t be put in small spaces or within sealed enclosures as they need a good amount of circulation. Cordless loudspeakers that have small efficiency have to have a bigger power source to output the same level of music power as high-efficiency versions. Further, because of the large amount of heat, there will be much greater thermal stress on the electrical elements as well as internal materials which may result in dependability problems. In comparison, high-efficiency wireless loudspeakers can be produced small and lightweight.

The efficiency is shown as a percentage in the outdoor wireless speakers data sheet. Analog Class-D amplifiers offer a power efficiency of roughly 25% whilst switching-mode amps offer close to 98%. The larger the efficiency figure, the less the amount of energy wasted as heat. A 100-Watt amplifier having 50% efficiency would have a power consumption of 200 W.

Please note, however, that efficiency is dependent upon just how much energy the amp provides at a given moment. Amplifiers possess greater efficiency when delivering higher output power than when working at low power due to the fixed energy that they use up irrespective of the output power. The efficiency value in the amp data sheet is usually provided for the greatest amp output power.

The measurement setup of amp power efficiency utilizes a power resistor that is attached to the amp. The amplifier itself is being fed a constant-envelope sine-wave tone. Then the power consumed by the resistor is tested and divided by the power the amp consumes. Normally a complete power report is plotted to show the dependency of the efficiency on the output power. For this reason the output power is swept through various values. The efficiency at every value is tested and a efficiency plot generated.

Even though switching (Class-D) amplifiers have amongst the greatest efficiency, they have a tendency to have larger music distortion than analog music amps and reduced signal-to-noise ratio. As a result you will have to weigh the dimensions of the wireless speakers against the audio fidelity. Some new wireless loudspeakers, including models which include Class-T amps, are able to lessen audio distortion to amounts near to the ones from types using analog music amplifiers and in addition can accomplish great signal-to-noise ratio. Selecting one of these cordless speakers will deliver high power efficiency and at the same time large music fidelity.


A Look At Bluetooth Music Receivers

Today’s mobile devices enable you to hold and view films in addition to songs. The headphones that are bundled with cellular phones generally offer you relatively poor sound quality. Having said that, you could get significantly better sound quality by simply streaming the music to a set of speakers. If you’re looking for a way to stream songs from the mobile phone to some stereo speakers then you will find a number of options to choose from. Here I am going to take a look at a number of of those options to offer a better understanding of what is out there.

Speakers will be a very good substitute to earphones which can come with your cellphone. They have far better audio quality and you are not tethered to the cellphone. Connecting a cellphone to some loudspeakers can easily be achieved in various ways. Bluetooth music receivers happen to be on the list of most popular choices with regard to streaming tracks from your cellphone. Bluetooth is supported by just about all of today’s mobile phones. Bluetooth audio receivers can receive the audio which is streaming from your cellular phone plus transform the wireless signal back to audio. Bluetooth supports quite a few standards designed for sending tracks. A2DP plus AptX happen to be among the most popular protocols. AptX, though, is only recognized by the most recent generation of cellular phones while A2DP is compatible with the majority of mobile handsets.

Take note though that Bluetooth audio receivers can’t be connected to passive stereo speakers without the need for a power amplifier. As opposed to making use of a wireless Bluetooth receiver, you may additionally obtain an integrated receiver/amplifier. Those products have an integrated audio amp. They may connect straight to any kind of passive stereo speakers. The cordless range of those receivers is typically only around 30 ft. So never consider using these for streaming music through your home. The actual range will depend on your environment and also on your mobile phone. It’s also possible to transmit tunes from many other gadgets which understand Bluetooth by utilizing the same setup.

You will discover other standards out there for sending audio from your mobile phone. One of those particular standards is Airplay. Airplay may transmit audio uncompressed plus improve on the audio quality of Bluetooth if you have uncompressed tunes available. If however you have got uncompressed music available then making use of Airplay makes a lot of sense. AptX is a compromise between the common A2DP protocol and Airplay. AptX is certainly a great substitute to Airplay considering the fact that it isn’t Apple specific. It does provide better audio quality than many other standards just like A2DP. Additionally, it’s understood by recent smartphones.

As opposed to using a Bluetooth audio receiver, you might wish to look at Bluetooth cordless loudspeakers. These types of loudspeakers may receive songs directly from your smartphone without using a separate receiver. You can find many types available on the market. It is often best to try out the speakers prior to your investment. Many Bluetooth loudspeakers are lacking a good deal when it comes to sound quality compared to a good set of regular speakers. Additionally you should be certain that any particular type of Bluetooth wireless loudspeakers is compatible with your cellphone just before your investment.


What To Be Cautious About When Purchasing A Couple Of Wireless Outdoor Loudspeakers

In this piece of writing, I am going to clarify the term “total harmonic distortion”, often also called “THD” which is regularly used to describe the quality of cordless loudspeakers (You may get detailed resources on the subject of wireless waterproof speakers at this source).

Looking for the ideal model from the vast number of products, you might have a hard time comprehending some of the technical jargon and terms that you will see in the specifications of the latest wireless speakers. THD is typically not as easily understood as various other commonly used specs including “signal-to-noise ratio” or “frequency response”.

In a nutshell, THD describes the difference between the sound which is produced by the speaker versus the audio signal with which the loudspeaker is driven. The most widespread methods to state distortion are percent along with decibel. These two conventions can be translated into one another. A -20 dB or 10% distortion means that one tenth of the radiated audio is a result of distortion while -40 dB or 1% would mean that one percent of the energy are harmonic products of the original signal. Harmonic distortion in a cordless loudspeaker is really the consequence of a number of elements, such as the power amplifier which is built into the speaker to drive the speaker element. The amp itself will have a certain amount of distortion. Typically the distortion of the amplifier will be higher the more output power it supplies to the speaker. Normally vendors are going to publish amplifier distortion based on a specific amount of power, generally a lot less than the rated maximum amp output power.

Having amplifier distortion specifications for a few output power levels provides a better picture of the amplifier distortion performance.Usually distortion is measured with a 1 kHz test tone. However, amplifier distortion will usually increase with increasing frequency, particularly in digital class-D models. The second contributing factor is the loudspeaker element itself. Many loudspeakers utilize a diaphragm type driver which is driven by a coil that is suspended in a magnetic field. The magnetic field is excited by the audio signal. The variation in magnetic flux, though, is not completely in sync with the music signal resulting from core losses plus other factors. Also, the type of suspension of the diaphragm will cause nonlinear motion. As such there is going to be speaker element distortion that furthermore depends on the amount of output power with which the loudspeaker is driven.

As such both the amp and the loudspeaker element itself add to distortion. Furthermore, there are other factors that also contribute to distortion. The whole amount of distortion is the sum of all of these factors. The enclosure of the loudspeaker is going to shake to some extent depending on the sound pressure level. These vibrations are going to also be non-linear in nature and contribute to distortion. To find out the overall distortion of a loudspeaker, a signal generator is used which provides an ultra-linear signal to the speaker and a measurement microphone that is attached to an audio analyzer in order to calculate the amount of harmonics radiated by the speaker. Though, pure sine signals hardly give an accurate picture of the distortion of the cordless speaker with real-world signals. A better distortion analysis is the so-called intermodulation distortion analysis in which a test tone that consists of a number of sine waves is used. Next the level of harmonics at different frequencies is measured.

In addition, please note that the majority of cordless speakers will experience audio distortion during the audio transmission itself. This is mostly the case for transmitters which use analog or FM type transmission. More advanced types use digital audio transmission. Generally these transmitters work at 2.4 GHz or 5.8 GHz. On top of that, check out to get a lot more facts.


A Glance At How Contemporary Wireless Speakers Work In Real-World Circumstances

Wireless audio is now popular. A multitude of consumer products including wireless speakers are eliminating the cable and promise greatest freedom of movement. I am going to analyze how most current cordless systems can cope with interference from other transmitters and exactly how well they will work in a real-world scenario. The rising interest in wireless consumer systems just like wireless speakers has begun to cause problems with a number of gadgets competing for the restricted frequency space. Wireless networks, cordless telephones , Bluetooth and also some other devices are eating up the valuable frequency space at 900 MHz and 2.4 GHz. Wireless audio gadgets need to ensure reliable real-time transmission in an environment having a large amount of interference. The most affordable transmitters typically transmit at 900 MHz. They operate similar to FM radios. Considering that the FM signal uses a small bandwidth and thereby just uses up a small part of the available frequency space, interference is usually avoided through changing to an alternative channel. Digital sound transmission is usually employed by more modern audio products. Digital transmitters normally function at 2.4 Gigahertz or 5.8 GHz. The signal bandwidth is higher than 900 MHz transmitters and thus competition in these frequency bands is high.

A few wireless systems for example Bluetooth devices and cordless telephones use frequency hopping. Therefore just changing the channel won’t avoid these types of frequency hoppers. Sound can be viewed as a real-time protocol. As such it has stringent requirements concerning reliability. Furthermore, small latency is vital in lots of applications. Thus more sophisticated means are necessary to ensure stability. A regularly utilized strategy is forward error correction in which the transmitter sends extra data with the sound. From this additional data, the receiver can restore the original data even when the signal was damaged to some extent. Transmitters using FEC by itself generally can transmit to any number of wireless receivers. This mechanism is usually used in systems where the receiver is not able to resend information to the transmitter or in which the quantity of receivers is pretty big, just like digital stereos, satellite receivers etc.

In situations in which there’s merely a few receivers, frequently a different method is employed. The wireless receiver sends information packets back to the transmitter to confirm good receipt of information. The information packets have a checksum from which every receiver may decide if a packet was received correctly and acknowledge proper receipt to the transmitter. If a packet was corrupted, the receiver is going to notify the transmitter and ask for retransmission of the packet. Therefore, the transmitter must store a great amount of packets in a buffer. Equally, the receiver must have a data buffer. Using buffers will cause a delay or latency in the transmission. The amount of the delay is proportional to the buffer size. A larger buffer size enhances the dependability of the transmission. Video applications, nevertheless, require the audio to be in sync with the video. In such cases a large latency is difficult. Wireless systems that use this approach, nonetheless, can only broadcast to a limited quantity of cordless receivers. Commonly the receivers have to be paired to the transmitter. As each receiver also requires broadcast functionality, the receivers cost more to manufacture and also consume more energy. In order to avoid crowded frequency channels, some bluetooth speakers keep an eye on clear channels and may switch to a clean channel once the existing channel gets occupied by another transmitter. Since the transmitter has a list of clear channels, there isn’t any delay in looking for a clean channel. It is simply selected from the list. This technique is often referred to as adaptive frequency hopping spread spectrum.


Wondering How To Get The Most Out Of Your Cell Phone? Try These Tips!

As with most technology, there is much to know about cell phones (go to this site in order to read through useful info regarding cell phones in school). Using them right and buying them are all things you should learn about. The paragraphs that follow are full of information you can use to make educated decisions in all cell phone matters, so keep reading.

If your phone falls into water, never make an assumption that it can’t be used any more. Take the battery out and put your phone in a bag with rice. It will help clear out any moisture that’s still sitting in the phone.

A smartphone will tend to slow down the longer it is used. It is a fact that getting updates for your software can help the phone not be obsolete. However, over time your phone will not have the memory required for new updates. In short time, new updates can overwhelm an older phone.

If your signal is 4G or LTE, then be mindful about your video watching. Most phone plans often come with a limited allowance for data each month. Videos use up a lot of data, so you may have unexpected charges. Look for a new plan if you frequently go over.

If you have a smartphone, you most likely use it quite often throughout the day. Turn it off from time to time when you can. Treat your cell phone like a computer. When you restart them you can free up memory so it can run well. You will probably notice an improvement in performance just by shutting your phone down several times a week.

Extended warranties can be tricky. Typically, these are really just additional cost with no real added value to you. If a cell phone is going to fail, it typically happens in the first year which is normally covered by the basic warranty. Plus, a lot of people buy a new phone ever year, so the warranty that’s extended really isn’t worth it.

Is your battery running out fast? It’s likely that your signal is low. Weak signals can kill a battery. If you aren’t going to use your phone, never place it somewhere with a weak signal, like your closet or drawer.

Don’t hesitate to give other brands a try even if you’ve always utilized a particular brand in the past. Although you might be used to using a particular screen layout or interface, be sure to have an open mind. You never know what you could discover!

If you always buy a certain kind of phone, think about another option for once. Although you may feel more comfortable with one over the other, trying out new things is never a bad idea. Taking a glance at what kinds of phone are out there can lead you to getting more functionality from cellphones.

There is not an optical zoom on your cell phone. Walk closer to the image you desire to get a picture of. You might also purchase specialized lenses that work with your phone, allowing you to take better pictures.

Don’t let your phone’s battery die before recharging it. The battery in your cell phone is designed to be periodically recharged. When you allow the battery to get low before charging, it eventually has difficulty gaining much of a charge. Try putting it on the charger sooner rather than later.

Having knowledge about cell phones is important before you use them. Put some time towards learning a few things, and you will reap benefits. This article includes lots of information but don’t stop here.