Hello, welcome to LED Light Product,Technology,chipLED Light Product,Technology,chip - LED Light Product,Technology,chip

cheap police led light bars

Release time:2016-05-13

SECTION1: The Difference Between A DJ Audio System And A BAND Audio System.DJ sound systems are different from BAND soundsystems inone basic way. A BAND sound system is for "live" audio amplificationwhile a DJ and Dance Club sound system is for "Pre-Recorded" audioamplification. The dominant input device for a BAND sound system ismultiple microphones. The dominant input device for a DJ and Dance Clubsoundsystem is a CD player or turntable. Since most vocal ranges fall intothe "Midrange"category, this is by far the most important area for a BAND soundsystem. Ironically, the exact opposite is true for playing pre-recordedmusic from a CD. If you ever look at the equalizer in a DJ system orDanceClub, you will notice that it look like a big V. The extreme lows andhighs are raised while the mids are dropped. This is not usually trueforequalizers in a BAND sound system since bands want to emphasize thevocals in the midrange area and constantly have to battle feedbackcaused by the microphones.SECTION 2: The Components Of A Basic DJSystem.All sound systems need to have an INPUT device.This isthe device that creates the sound. There are many steps abovethis, but this is where we start. The devices that fall intothiscategory are Microphones, CD Players,MP3 Players, Turntables and tape decks. These devices create sound, butnot at a level that will drive a speaker so we can hear it. The nextlink in our chain is a mixer to manipulate the input devices. A verybasic mixer might just have 2 volume controls, but the most commonmixers have a lot more than that. Since most DJ's want to raise theextreme low's and high's of the dance music, but not for their mic, itis important to have separate EQ for the DJ mic. Ideally you would haveseparate EQ for each input. The most common form of EQ for each inputis a simple bass and treble knob. Most popular mixers also have a dual7 to 10 band EQ for the output as well. The output of your mixerconnects to the input of the amplifier. Most amplifiers have twochannels and a volume control for each channel. The output of the 2amplifier channels connect to your full range speakers. This is a basicDJ or Dance Club sound system.SECTION3: A Better Equalizer.Some people would say that the next step toperfectingyour sound system is an electronic crossover, but I disagree. AlthoughI strongly believe electronic crossovers add tremendously to theclarity of your sound system, I think the next step for any DJ would bea better equalizer. In my opinion, if you have no equalizer or even adual 10 band EQ built in your mixer, the next important step is to geta good dual 15 band EQ that connects to the output of your mixer. Youneedthe flexibility and control that a good dual 15 band EQ offers if youwant to make any sound system sound it's best.SECTION 4: Now Add A 2 Way ElectronicCrossover.Here's what we have so far: a dual CD player anda micconnected to a 19" rack mount mixer with a dual 7 band EQ. The outputof the mixer is connected to the input of a new dual 15 band EQ. Theoutput of that EQ is connected to an amplifier with 2 full rangespeakers connected. After you have a good dual 15 band EQ,thenit's time to add anelectronic crossover, but keep in mind, this means you have to addanother amplifier and more speakers as well. When you add a 2 wayelectronic crossover, it is usually done to add sub woofers to yoursystem. The output of your dual 15 band EQ connects to the input ofthis new electronic crossover and the HIGH outputs of this electroniccrossover connect to the inputs of the amplifier for your full rangespeakers. The electronic crossover has another set of outputs for a subwoofer amplifier. You would connect the SUB-WOOFER outputs on theelectronic crossover to the inputs of a second amplifier that had oneor two SUB-WOOFER speakers connected to it. You can usually adjust thepoint at which the frequencies split between the full range amplifierand the sub woofer amplifier. Technically you now have a TWO WAY sound systemnow made up of subwoofers and full range speakers. The signals for each speaker are splitbefore amplification. You still have a PASSIVE (coil &capacitor)crossover in your full range cabinets, but you now have an ACTIVEcrossover separating the very low frequencies from ever reaching yourfull range speakers.  Crossing over these signals BEFORE theamplifier, in an electronic crossover is much cleaner and safer thanusing "PASSIVE" (Coil & Capacitor) crossovers inside thespeakercabinet. Here's why: If you have a 500 watt per channel amp, then yourPASSIVE (coil & capacitor) crossover has to do it's job ofseparating the signal at a very high volume or power level. Thisis a job that creates heat. The higher the power of your amp, thehotter your PASSIVE crossover gets. When a coil & capacitor gethot, they let some signals slip through that they shouldn't and this ishow you blow horn and tweeter drivers.  SECTION5: A 3 Way Electronic Crossover Is Even Better.The next step would be to replace the 2 WAY Electronic Crossoverwith a  3 WAY Electronic Crossover. The IDEAL DJ or Night Clubsoundsystem would have a 3 way Electronic Crossover and a separate amplifierfor each set of speakers. This 3 way crossover has a Sub Woofer outputthat connects to the input of an amplifier that has oneor two SUB-WOOFER speakers connected to it. These Sub Woofer speakercabinets will typically have 18" woofers in them. The 3 way crossoverhas a MID RANGE output that connects to the inputs of a secondamplifier that powers the MID RANGE speakers. These MID RANGE speakercabinets will typically have 15" or 12" woofers in them. The3 way crossover has a HIGH RANGE output that connects to the inputsof a third amplifier that powers the HORNS. These HORN speaker cabinetswill typically have compression drivers with titanium diaphragms inthem. This"3 Way" system is ideal because you have protected your speakercomponents the very best way possible to keep dirty signals fromgetting past over-heated PASSIVE (coil & capacitor) crossoversthatlead to burnt drivers. This keeps you from burning out your horndrivers as easily and it makes you system produce CLEARER sound. Thesound will be clearer because you have eliminated all coil &capacitor crossovers that can get hot and send distorted signals toyour speakers.  SECTION 6: Loud Versus Pleasing To YourEars.This is the biggest mistake I have ever seen DJ'smake.They think that having the "Loudest" system is what it's all about.WRONG!!!  There is a HUGE difference between "Loud" and"Pleasingto your ears". How many times have you walked into a club or hotelballroom to discover that the loud music you heard hundreds of feetaway, (the music that actually drew you in the room) sounded horrible,or even intolerable once you were in the room? It happens all the time!Why? Because so many DJ's (and bands too) think loud is all thatmatters. I can take the IDEAL sound system we designedabove and havemusic that you are not fond of playing at 128db and you will find itpleasing to your ears. I can take the same sound system and play yourfavorite song at the same 128db, but after I use the EQ to adjust thewrong frequencies up and down, you will want to run out of theroom!  Here's how and why: Distortion pains our brain.Certainfrequencies pain our brain. The type of music is irrelevant. It's howit is heard that matters.  RULE#1. Never play your music so loud that itsoundsdistorted. This means that you will have to walk out in front of yourspeakers MANY times during the night to hear for your self.  RULE#2. Not all songs are equalized in the samemanner or tothe same standard.  This is even more of a problem now thatmostof the music played by DJ's and Night Clubs is coming from computers orMP3 players. When music is compressed for mp3 players, you lose theextreme highs and extreme lows and there is NO GETTING THEM BACK! Youcan use every sound processor or sonic maximizer out there and they maymake your compressed music sound better, but it will NEVER sound asgood as it did before it was compressed. Period.  Did you knowthat a top of the line cassette deck can play music with a broaderfrequency range than compressed music on an mp3 player? It's true. Ididn't believe it at first, but I tried it and heard thedifference.  If you have to use a computer or mp3 player andwant toimprove the sound of your system, start with the original music CD andimport it using the highest quality compression rate available. Forexample, iTunes offers 256kbps as their highest quality rate. Mostpeople can hear the difference between music played on a good DJ soundsystem that is 256k and others that are 128k. Anybody playing music ona DJ or Club system that was compressed at anything below 128k shouldbe arrested for irritating our ears and brains!  Remember, The original CD is still compressedmusic, but it is usually the best we have access to. SECTION7: Multiple Amplifiers.As is most of what I have written above, this isMY PERSONALOPINION based on 34 years in the audio business. I believe that if youare a DJ and you have four speakers that need 250 watts each, youshould have TWO AMPLIFIERS instead of one big one. Here's why: If youare a DJ that travels around and sets up your gear a few hours beforethe show, you don't have time to buy or borrow another amplifier ifyours dies. If you are a night club, you can't afford to not have soundone night if your only amplifier dies. So, the answer is to always havea Plan B. Multiple amplifiers. Amplifiers are cheap now and racks havewheels, so do yourself a favor and boost your confidence by knowing youalways have a back up. It's a lot better than refunding money becauseyou couldn't perform! SECTION 8: Speaker Cables.First of all, you should read our SIMPLE GUIDE TOSPEAKERS on our web site. It gives quite a bit of information aboutspeaker cablesand plugs. Here's the important stuff:1. Speaker cables do not have to be shielded. NOT Shielded means thetwowires do not need to have what looks like aluminum foil wrapped aroundthem. Audio patch cables that are used for connecting any and all audioequipment except for speakers, must have a shield around the two orthree wires to prevent radio signals and power line signals frominterfering with the pure audio signal.2. Size Matters! The more power you are running toyourspeakers, the heavier gauge wire you need and the better the connectorneeds to be on each end of that cable. You can never go wrong using 12gauge cables. You are never using the best connector when you are usingcommon 1/4" plugs. A DUAL BANANA plug provides the BEST connection forflow of power of all connectors readily available for Clubs and DJ's.

 

Police Lights | Emergency Lighting | Extreme...
What are Extreme Tactical Dynamics LED Police Lights and Light Bars?

 

Police Lights LED Warning Emergency Strobe Light...
Buy Police Lights LED Strobe lights such as warning emergency lights and light bars cheap.

 

LED Light Bar
If you are reading this article I am assuming that you want to purchase the best LED light bar. I want to help you make your decision and I am going to present 5 of ...

 

Cheap Police Led Light Bars - Image Results
More Cheap Police Led Light Bars images

 

Best LED Light Bar Reviews & Ratings For 2016
Contents. 1 Best LED Light Bars For The Money; 2 What is a LED Light Bar and Why Do You Need One? 3 LED Light Bar Applications; 4 LED Light Bar Types; 5 What Is a ...

 

LED Light Bars - Full-Size & Mini Light Bars |...
Trade in Old Emergency Lights for New Light Bars with LED Technology Is it time to get r ...

 

Best LED Light Bar Reviews For Your Off Road Truck...
Find The Best LED Light Bar for your off road truck by reading our comprehensive guide and led light bar reviews. Only the Best LED Light Bars included.

 

Police Lights - Firefighter Lights - LED Grill...
LED grill lights & LED Deck lights for fire, police, ems & utility vehicles. 5 Year warranty means your seen & covered!

 

Theatrical Lighting Equipment Sales | Cheap LED...
Shop our large selection of Stage Lighting, Theatrical Equipment, Audio, Video Lighting equipment for all your AV needs.

 

Federal Signal LED Light Bar Review
Industry Leading LED Light Bar Innovations from Federal Signal. Federal Signal creates products for public safety vehicles such as police cars, fire engines ...

 

LED area light - Larson Electronics
LED lights, Led light bar, LED light emitter bars
  • Disclaimer:
  • The content of this site is collected from the Internet, not on behalf of the position of the station, the view for the reader reference.
  • If there is anything wrong with this site, please contact us, we will be in the first time to delete the processing.