Powered Loudspeaker
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New 2Way PA DJ Powered Active 10 Loudspeaker PP1002A1 |  |
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US $179.99 | 1d 15h 53m |
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YAMAHA MS202 POWERED LOUDSPEAKER OWNERS MANUAL | |
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US $15.00 | 2d 6h 39m |
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YAMAHA MS101 POWERED LOUDSPEAKER OWNERS MANUAL | |
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US $15.00 | 2d 6h 39m |
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Harman Kardon GLA-55 2.0-Powered Loudspeaker System (Clear) List Price: $999.99 Sale Price: $999.00 Used From: $756.26  |
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I'm just going to get this out of the way now, since I'm guessing I'm not the first to say this and know I won't be the last--the Harman Kardon GLA-55 2.0 speakers look like they were hewn cold out of the side of Superman's Fortress of Solitude... |
Only 2 or 3 percent of the signal given to a woofer is converted into sound?
http://en.wikipedia.org/wiki/Loudspeaker#Efficiency_vs._sensitivity
http://www.the12volt.com/installbay/forum_posts.asp~TID~73962~PN~1
This means that if i do make a man-powered huge woofer; the ~50 watts your arm can put out will be like a 5,000 Watt amp. Good. But unbelievable....
Incorrect your arm would have to put out 5000 watts to get 50 watts of sound.
aka the amp that you would create with your arm would be less than half an watt
-Patrick
Site Admin
http://www.carstereoforum.net/
Got Questions? We can help!
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New 2Way PA DJ Powered Active 10 Loudspeaker PP1002A1 | |
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US $179.99 | 1d 15h 53m |
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YAMAHA MS202 POWERED LOUDSPEAKER OWNERS MANUAL | |
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US $15.00 | 2d 6h 39m |
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YAMAHA MS101 POWERED LOUDSPEAKER OWNERS MANUAL | |
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US $15.00 | 2d 6h 39m |
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JBL AM6215 64 High Power 2 Way Loudspeaker New | |
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US $1,435.00 | 2d 13h 15m |
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Behringer B215D 550 Watt 15 Powered DJ PA Speaker Class D Active Loudspeaker | |
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US $249.95 | 19d 14h 51m |
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2 JBL EON315 15 2 Way Powered Speaker EON 315 Active PA Loudspeaker MINT | |
18 Bids | US $464.99 | 2d 23h 1m |
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Audio2000s ASP5208P 360W Built in Amp 15 Woofer Pro Active Powered Loud Speaker | |
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US $224.95 | 2d 23h 26m |
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2x New Mini Super Power Loud Speaker Tweeter for Car | |
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2x JBL PRX615M Powered 15 Full Range Speaker PRX 615 Active Loudspeaker MINT | |
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US $1,389.99 | 17h 27m |
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Brand New PA Powered Active 10 Loudspeaker PP1003A1 | |
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US $189.99 | 3d 21h 13m |
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PAIR 2 JBL EON 315 15 2 Way Powered Speaker EON 315 Active PA Loudspeaker | |
0 Bid | US $825.00 | 4d 1h 48m |
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Yamaha MS101III Powered Loudspeaker | |
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US $100.00 | 4d 14h 11m |
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2 Way PA Band Powered Active 10 DJ Podium Pro Audio Loudspeakers New PP1003A | |
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US $309.99 | 4d 19h 27m |
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2 Way PA DJ Powered Active 10 Loudspeaker 500 Watts PP1002A1 | |
55 Bids | US $52.00 | 4d 21h 19m |
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JBL PRX615M Powered 15 Full Range Speaker PRX 615 Active Loudspeaker MINT | |
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US $699.99 | 17h 22m |
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2 Behringer Eurolive B210D 10 Powered PA Loudspeakers White FREE BRACKETS | |
0 Bid | US $389.00 | 5d 10h 16m |
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2 Behringer Eurolive B210D 10 Powered PA Loudspeakers White | |
0 Bid | US $399.00 | 5d 10h 24m |
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Mackie TH 12A Thump 12 Powered PA Cabinet LoudSpeaker | |
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US $238.99 | 27d 22h 46m |
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2 Behringer B215D 1100w 15 Powered DJ PA Speakers Class D Active Loudspeakers | |
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US $534.95 | 19d 14h 45m |
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MACKIE THUMP TH 15A 2 WAY POWERED LOUDSPEAKER 220V PAIR | |
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US $899.99 | 24d 14h 5m |
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JBL PRX615M PRX 615M 15 1000W Powered PA LoudSpeaker | |
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US $899.00 | 26d 23h 26m |
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Mackie TH 15A TH15A Thump 15 Powered PA LoudSpeaker | |
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US $266.00 | 24d 13h 56m |
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Peavey Impulse 12D 1200 Watt Powered PA Loudspeaker 12 Demo | |
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US $659.00 | 2d 20h 48m |
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Carvin PM10A 2 Powered Mains Loudspeakers Reference Monitors 10 PA Speakers New | |
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US $499.00 | 19h 18m |
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Mr DJ PBS 1205AMP 10 1200W Powered Professional DJ Loud Speaker | |
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US $179.99 | 22h 38m |
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JBL EON 515XT Powered Loud Speaker 500W | |
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US $699.99 | 23d 13h 22m |
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Peavey PV115D 400W Powered 15 Loudspeaker New in Box | |
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US $279.99 | 5d 20h 27m |
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Mackie HD 1221 12in 2 Way Compact High Definition Powered Loudspeaker Black | |
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US $799.99 | 18h 20m |
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NEW PYLE PRO PPHP1288A 12 800W Powered PA Loud Speaker | |
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US $199.95 | 3d 15h 15m |
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MACKIE HD1521 15 POWERED LOUDSPEAKER 2WAY SPEAKER NEW | |
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US $999.99 | 18d 17h 3m |
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PylePro PPHP1599AI 15 1600 Watt Portable Powered 2 Way Full Range Loud Speaker | |
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US $341.88 | 25d 18h 49m |
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Peavey Impulse 12D 1200 Watt Powered 12 PA Loudspeaker | |
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US $679.00 | 29d 13h 5m |
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American Audio DLP 15P 300W 15 Powered 2 Way Pro Audio DJ Loudspeaker Speaker | |
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US $279.99 | 24d 13h 54m |
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Electro Voice ELX112P Powered 12 Loud Speaker | |
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US $449.00 | 27d 14h 35m |
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GEMINI RS 415 PRO DJ POWERED 1200W AUDO LOUD SPEAKER | |
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US $269.95 | 28d 18h 50m |
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JBL PRX612M 12 2 Way 1000 Watt Powered Loudspeaker | |
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US $799.00 | 17d 23h 35m |
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Harbinger HP112 Powered Loudspeaker | |
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US $599.99 | 28d 19h 10m |
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Harbinger HP115 Powered Loudspeaker | |
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US $699.99 | 28d 18h 31m |
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QSC KW181 KW 181 18 Powered Sub Active PA LoudSpeaker | |
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US $1,399.00 | 26d 23h 26m |
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Mackie SRM450v2 12 2 way Powered Speaker Mackie srm 450V2 Loudspeaker NEW | |
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US $549.99 | 27d 17h 50m |
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MACKIE TH 12A THUMP 12 POWERED PA CABINET LOUD SPEAKER | |
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US $224.99 | 25d 22h 55m |
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Mackie HD1221 12 Powered Loudspeaker HD 1221 New Authorized Dealer | |
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US $799.99 | 27d 17h 50m |
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JBL Powered 15 EON 315 DJ Loudspeaker 560 Watts New | |
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US $549.00 | 28d 20h 8m |
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JBL Powered 15 EON 510 DJ Loudspeaker 560 Watts New | |
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US $629.00 | 28d 19h 27m |
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Mackie HD 1221 12 Powered Loudspeaker HD1221 2pk New Authorized Dealer | |
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US $1,599.99 | 27d 17h 50m |
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QSC KW 122 12 Powered PA Loudspeaker KW122 Factory B stock Blemished Stock | |
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US $989.10 | 9d 16h 42m |
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Mackie HDA 12 2 Way HD Arrayable Powered Loudspeaker | |
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US $1,799.99 | 28d 19h 12m |
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PylePro 12 800 W Powered 2 Way Loud Speaker System | |
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US $191.70 | 21d 13h 9m |
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Mackie TH 12A 12 2 Way Powered Loudspeaker | |
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US $299.99 | 28d 19h 12m |
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JBL EON 515XT 15 2 Way Powered Loudspeaker Free JBL Bag | |
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US $699.00 | 29d 18h 59m |
ELECTROVOICE ZXA1 COMPACT POWERED LOUDSPEAKER AT NAMM 2010 WITH IDJNOW
Characteristics and Functions of Loudspeakers
Loudspeaker is an electro mechanical transducer that converts an electrical signal into sound. The term loudspeaker can be applied to any of the individual devices or drivers or the complete system consisting of an enclosure incorporating one or more drivers.
A Loudspeaker consists of a number of drivers to reproduce a wide range of frequencies for high sound pressure level or high fidelity applications. These drivers comprise of the subwoofers for very low frequencies, woofers for low frequencies, squawkers for middle frequencies, tweeters for high frequencies and super tweeters for very high frequencies.
Most loudspeakers consist of drivers built up in an enclosure or a cabinet with a back opening for connection of the wires and to make any adjustments. They generally use two wiring points to connect to the main source, say, to the audio amplifier or receiver. This is done by using the binding post or the spring clips at the back of the enclosure.
If both positive and negative connections and the amplifier of each drivers are not connected in phase with each other, the loudspeaker will produce a destructive sound wave and interference will occur when a common signal is sent to each speaker. This is generally termed as out of phase. These errors in connection will not damage the speakers but can positively tamper the sound waves that partially cancel those from nearby speakers.
The simplest way to check wiring phase problems with your loudspeaker system is to temporarily adjust the bass tone control up and the treble control down, then move the balance control so that sound is alternately heard from both left and right speakers separately. If the music has the bass tones mixed to mono the bass should be loudest with the control centered. If the bass is louder with only one channel playing, you should know that there may be a wiring error or the music signal is not mono in the low bass.
Now let us look at some brief points on the characteristics of loudspeakers which are suitable for live-like sound reproduction. When the sound of any instrument or voice reaches us but the source is blocked from our view, we will be able to determine whether it is coming from the loudspeaker or live. This is due to the power response, the radiation in all directions that is often different between a speaker and a live source.
Most loudspeakers have a power response that drops 10dB to 20 dB from low to high frequencies. Or it could be through the slow decay of transients due to energy storage in resonant mechanical and acoustical structures of the speaker which we recognize as typical for a loudspeaker and missing in the corresponding live event.
To obtain an outstanding performance from the loudspeaker system you own, there are a set of properties for loudspeaker design that must be followed to obtain an outstanding product. While getting a speaker you should keep in mind that you get drivers with a low-linear distortion. These drivers can move sufficient amount of air linearly in all parts of the frequency range especially at a low end.
Loudspeakers should have a minimal excitation of room resonances, particularly at low frequencies. For this purpose you will need low directional speakers like dipoles. It should have a low amount of stored energy in drivers, cabinet or enclosure, air cavities and filters for fast transient decay.
These loudspeakers should reproduce a smooth, extended frequency response from 20 Hz on up and without exaggerated high frequencies, both on-axis and off-axis. In others it should have a minimal roll-off power response.
About the Author
Victor Epand is an expert consultant for music gear, speakers, and microphones. You can find the best marketplace for music gear, speakers, and microphones at these 3 sites: music gear, DJ equipment, recording equipment, loudspeakers,, and microphones.
