Powered Speakers Active
Powered Speakers Active
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 New PA DJ Band Powered 12 Inch Active Speaker PP1202A1  US $224.99
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 New Stage Powered Speakers Active 10 Monitors PP1002A US $329.99
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 12 PA DJ Band Active Podium Pro Audio Powered Speakers New PP1204CA US $469.99
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 Podium Pro Audio 15 Active Powered DJ Speakers Pair New PP1504CA US $599.99
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 POWERED 15 SEISMIC AUDIO PA DJ SPEAKERS Active Speaker US $214.99
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 New PA DJ Band Karaoke Powered Active 8 2 Way Speaker PP802A1 US $159.99
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 8 PA DJ Band Powered Speakers Active Monitors New PP802A US $289.99
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 New Powered DJ PA Active 15” Inch Podium Pro Audio Speaker Pair 1800W PP1503A US $499.99
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 2 New SEISMIC AUDIO 10 POWERED PA DJ SPEAKERS Active US $259.99
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 New Powered DJ PA Active 12 Inch Speaker Pair PP1203A US $429.99
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 2 POWERED 12 SEISMIC AUDIO PA SPEAKERS Active DJ Band US $195.00
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 JBL PRX635 3 Way 15 Active Powered PA Speakers Stands Sub Extended Warranty US $3,516.70
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 New SEISMIC AUDIO 10 POWERED PA DJ SPEAKERS Active US $139.99
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 POWERED 12 SEISMIC AUDIO PA DJ SPEAKERS Active Speaker US $189.99
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 Audio2000s ASP5208P 360W Built in Amp 15 Woofer Pro Active Powered Loud Speaker US $79.95
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 SEISMIC AUDIO 18 PA POWERED SUBWOOFER Speaker Active US $299.99
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 Altec Lansing Technologies 58 14510 Active Powered 6 1 2 Two Way Speaker System US $59.99
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 QSC K8 8 Powered Active Speaker Pair w Bags Stands and 2 XLR Cables US $1,399.98
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 Mackie TH 15A Active Powered 15 PA Speaker Monitor DJ Portable System TH 15 US $299.00
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 NEW Behringer B215D Powered DJ Speaker b 215 d active US $264.99
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 Yamaha DXR12 Powered Loudspeaker 1100 W 12 New Active Speaker C stock US $559.99
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 YAMAHA MSP5 POWERED AMPLIFIED NEARFIELD MONITOR SPEAKER ACTIVE 2 WAY STUDIO NR US $99.99
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 BEHRINGER B215D POWERED SPEAKER Active Powered 550W 2 Way PA Eurolive 15 New US $264.98
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 Behringer B215D 550 Watt 15 Powered DJ PA Speaker Class D Active Loudspeaker US $279.99
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 NUMARK NPM100 POWERED ACTIVE DUAL 5 DJ MONITOR PA SPEAKER PAIR 2 speakers US $317.45
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 JBL PRX 535 Pair Active Powered 3 Way Powered Speakers US $1,500.00
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 Active Powered 6 1 2 Two Way Speaker System US $69.44 |
 2 Gemini RS 415 RS415 15 2400 Watt Active Powered DJ PA Speakers Bi Amped US $469.95
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 2 NEW DEURA 12 POWERED ACTIVE ABS SPEAKERS 2400W Watts US $328.99
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 MACKIE HR824 8 2 WAY ACTIVE POWERED STUDIO AUDIO REFERENCE MONITOR SPEAKER PAIR US $.99
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 PAIR GMI PRO POWERED AMPLIFIER 8 ACTIVE DJ SPEAKERS 1000 PAIR US $259.95
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 GEMINI RS 408 8 240w ACTIVE POWERED PA SPEAKER USED US $119.95
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 2 POWERED 15 SEISMIC AUDIO PA SPEAKERS Active DJ Band US $464.99
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 2x NEW Behringer B215D Powered DJ Speaker b215 d active US $539.99
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 RCF ART 315A Active Powered Speaker ART315A Authorized Dealer US $449.00
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 NEW DEURA 2 PCS 15 POWERED ACTIVE ABS SPEAKERS 3000 WATT FREE SHIPPING US $419.99
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 KRK Rokit 6 G2 RP6 Generation 2Active Powered Studio Monitor Speaker BRAND NEW US $149.00
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 BEHRINGER B212D POWERED SPEAKER Active Powered 550W 2 Way PA Eurolive 12 New US $218.98
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 Hisonic HS687 Powered Active PA 2 Way Speaker Monitor US $119.99
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 Behringer B205D Active POWERED 150W 525 PA SPEAKER US $149.99
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 2 Behringer B215D 1100w 15 Powered DJ PA Speakers Class D Active Loudspeakers US $534.95
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 Behringer B212D 12 Active Loud Speaker Powered Full Range Speaker US $204.58
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 Behringer B212D 12 Active Loud Speaker Powered Full Range Speaker New US $229.99
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 NEW 15 POWERED ACTIVE SPEAKER 1500W Power SD USB US $299.99
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 NEW 15 POWERED ACTIVE SPEAKER 1500W Power US $214.99
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 NEW 12 POWERED ACTIVE SPEAKER 1200W Power US $169.99
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 1 NEW DEURA 15 PLASTIC ABS POWERED ACTIVE SPEAKER 1500W HIGH POWER $224 US $224.99
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 1 NEW DEURA 12 PLASTIC ABS POWERED ACTIVE SPEAKER 1200W HIGH POWER $169 US $169.99
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Explaining The Distortion Specification Of Wireless Speakers
Have you ever asked what some of the technical jargon means that vendors take to show the quality of cordless loudspeakers? In this expose, I am going to clarify a regularly used specification: THD or "total harmonic distortion".Looking for the ideal type from the vast amount of models, you may have a hard time understanding a few of the technical jargon and specs which you will see in the specifications of modern cordless loudspeakers. Total harmonic distortion is generally not very well understood. However, this term is nonetheless significant by way of determining the performance of a specific model. Other specs, just like "output power" or "frequency response" are usually easier understood.
In a nutshell, THD shows the difference between the audio which is produced by the speaker versus the audio signal with which the speaker is driven. The most common ways to state distortion are percent and decibel. These 2 conventions can be translated into one another. A -20 dB or 10% distortion means that one tenth of the radiated sound is a result of distortion while -40 dB or 1% would mean that one percent of the energy are harmonic products of the original audio.On the other hand, be cautious as there are in reality a few elements which cause harmonic distortion. Wireless loudspeakers along with any kind of active loudspeaker or active subwoofer all have built-in power amplifiers to drive the loudspeaker element.|Harmonic distortion inside a cordless speaker is in fact the consequence of numerous components, such as the power amp that is built into the speaker in order to drive the speaker element.|A cordless speaker in fact has several components that add to harmonic distortion. One of these is the built-in power amplifier. This amplifier is driving the speaker element.} Generally the higher the amp is driven the higher the level of amp distortion. For this reason, several manufacturers will list amp distortion depending on amplifier output power.
Having amp distortion specs for several output power levels offers a better indication of the amplifier distortion performance.In addition, please understand that distortion typically is measured for a specific test tone frequency. Typically a 1 kHz sine wave tone is utilized during the measurement. This allows comparing equipment from various suppliers. However, distortion usually varies with different frequencies. A lot of digital amps are going to exhibit growing distortion amid higher frequency which cannot easily be discovered by looking at the spec sheet.
The second contributing factor is the loudspeaker element itself. Most loudspeakers employ a diaphragm kind driver that is driven by a voicecoil that is suspended in a magnetic field. The magnetic field is excited by the audio signal. The change in magnetic flux, however, is not entirely in sync with the audio signal resulting from core losses and other factors. In addition, the kind of suspension of the diaphragm will create nonlinear movement. As such the result is distortion brought about by the speaker element. The majority of manufacturers are going to exhibit harmonic distortion depending on the audio level as usually the higher the loudspeaker is driven the higher the level of distortion.
The total distortion of the speaker therefore is the total of the amp distortion and the speaker element distortion. On top of that, there are other contributing factors. The loudspeaker enclose is going to vibrate to some extent and therefore contribute to the distortion.Total distortion is best determined through measurement. A signal generator is used which supplies a highly linear sine tone to the speaker. The audio is recorded by a measurement microphone. The microphone signal is then analyzed by an audio analyzer. The audio analyzer will compute the level of higher harmonics or distortion. However, pure sine signals hardly give an accurate indication of the distortion of the wireless speaker with real-world signals. A better distortion analysis is the so-called intermodulation distortion analysis in which a test tone which consists of a number of sine waves is used. Then the level of harmonics at different frequencies is measured.
In addition, please understand that the majority of cordless speakers are going to experience signal distortion during the audio transmission itself. This is for the most part the case for transmitters which use analog or FM type transmission. More sophisticated products employ digital audio transmission. Typically these transmitters operate at 2.4 GHz or 5.8 GHz.
About the Author
You can find additional details about wireless outdoor speakers as well as wireless surround sound speakers from Amphony's web page.