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Electronic Crossover
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One of the most important requirements of a good disco setup is a pair of quality DJ Equipment Speakers. However, contrary to popular belief, you do not need lots of money to get your hands of an extremely effective pair of DJ speakers. It is common for people to opt for two extremes when buying speakers and that is they either go for dirt cheap DJ speakers that are second hand or spend lots of money unnecessarily on the top range JBL DJ speakers. The secret here is to allow a mid range budget for a pair of quality disco speakers from a good DJ outlet and to make sure that they are a well known model from a known manufacturer such as Peavey, Alto or Citronic.
All the mid range speaker manufacturers produce cabinets that will be very capable of giving all the sound requirements for most mobile discos and medium sized venues including night clubs. The most commonly overlooked aspect of choosing good disco speakers is not the speaker itself but the amplification required to drive the speaker/s at optimum levels for maximum efficiency.
As a summary the following are most common speaker options currently available:
2 Way Speaker Cabinets - These units include both a treble and bass cone and an electronic crossover providing sound distribution based on frequency to the individual speaker cones which generally provide a good balanced full range sound output.
Bass Bins - Individual bass cones, usually 12 or 18 inch, that provide solely bass frequency output which you can often feel rather than hear. These bass speakers require relatively large amplification to get the best possible output within their limited sound frequency range.
Active Speakers - These can include both 2 way speaker cabinets and single speakers but primarily the active definition means that they include inbuilt amplification rather than having to hook them up to an external amplifier.
Passive Speakers - Speakers that require external amplification and these are best suited to larger venues or where you already have amplification available.
As you can see there are different speaker options available, based on budget and requirement, but as a general rule most disco or DJ equipment setups include a pair of Passive 2 Way Speaker Cabinets plus a 300w to 600 watt external amplifier. There are some really good DJ speaker packages available at the moment, many including free DJ speaker stands, so you can haggle and get a good speaker package deal that will not break the bank and unlike buying second hand many reputable DJ suppliers will offer solid guarantees and warranties for added peace of mind.
Next, please remember that you do not have to spend a fortune on a really good pair of dj speakers that produce amazing sound. The most important aspect of choosing speakers is to best understand which combination of speaker and amplification works best for you and gives you superior sound quality. Now you can find out more about the best deals on dj speakers and cheap dj equipment aimed specifically with your needs in mind.
Digital Audio Crossovers
In the world of DIY Audio, building good passive loudspeaker crossovers isn't for the faint-hearted!
From the filter simulations to building & assembling the crossovers, there will most likely be more than one revision to get it right. Why? For one, because the software package you may be using to provide acoustic modeling of an enclosure & driver combo is only a model. In other words, an estimation based on math equations, not the real world where, for example, an odd reflection inside the enclosure may modify the response. Your choice of drivers will also interact with the crossover components/filter configuration, making it harder to simulate the system performance. In the end, any experienced loudspeaker builder would agree that there will always be some unknown element that software simulation doesn't cover. The trial & error with different configurations then wins hands down over the pretty software simulations. So you better get yourself ready with an extensive set of passive components, build multiple PCB's, start learning electronic theories (basic & advanced) and try out your luck to fit the previously simulated configuration. Quite a daunting task!
Digital crossovers
Coming to the picture are digital crossovers such as the miniDSP kit. With their great flexibility, ease of use and accurate response, controlling the parameters of a crossover becomes a child's play. A digital signal processor uses cascaded filter banks (IIR or FIR) to provide the processing you need. Forget about electronic design or PCB prototyping with our products. miniDSP kit, a low cost firmware upgradeable module, breaks the misconception of Digital Signal Processors (DSP) being expensive.
If you ever thought of building an active bi/tri/quad-amped loudspeaker , you must have also realized how complex of a task it is. A miniDSP kit, a small 4 channel amplifier and off you go prototyping your ideas. Loudspeaker prototyping finally getting back to audio, not writting code or understanding math equations.
Time alignment
In a loudspeaker cabinet, time alignment of each driver is paramount to proper wavefront reconstruction. Think of a tweeter and woofer, mounted to the front of your enclosure, their respective acoustic center will obviously be offset in space, so in time. The end result will be comb-filtering among other things. (Frequency response not uniform)
By combining time alignment along with the phase relationship from the crossovers, miniDSP kits can make acoustical outputs of adjacent loudspeakers to become coherent.One can easily prototype many configurations by modifying delay and crossover settings with a few mouse clicks.
Processed Active loudspeakers
miniDSP kits along with our soon to be released miniPower modules will be the perfect fit for DIYers in need of an easy solution to prototype small active loudspeakers. Neatly tucked inside the enclosure, the DSP + all digital amplifier combo will provide flexibility and useability DIYers always looked for.
Over are the days of passive filter prototyping, may the DSP fun begin!
For more information, check us out at miniDSP.com
About the Author
Tony is the co-founder of miniDSP, a company dedicated to digital signal processing for audio applications. Besides his passion for audio, electronics and music, Tony loves traveling through out Asia Pacific, discovering one culture at a time with what the world has to offer.
crossover point calculation?
i'm trying to figure out how to make my own electronic passive crossovers for my speakers. i know the equations for inductive and capacitive reactance, but the idea of resonance is escaping me. i am trying to calculate a high pass filter for an 8 ohm load and a low pass filter for a 4 ohm load, the crossover being 2KHz. i'd like to know the general equations used, so i can apply them to future projects.
look up an elctronics book at the library
A Crossover That’s More About Sport Than Utility
The Outlander is unusual among crossover S.U.V.’s in that it throws a few concessions to people who actually care about cars.
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