![]() 47μF for the compression driver and 4.7μF for the bullet tweeter will provide an extra -6dB/octave roll off. The turn on/off pulses and DC offset, from amplifiers could easily destroy driver and tweeter. The compression driver and bullet tweeter must have a Capacitor in series with the amplifier. Higher order slopes 4th order 24dB/octave with -6dB at the crossover points can be utilised to provide greater control over the speakers, but are more critical to calibrate. Slope (2nd order) 12dB/octave (Q 0.707) -3dB at crossover point (Butterworth) will give the best performance with least complications. Active is rarely taken to its fullest extent as a 4-way across the frequency spectrum, because of cost, time and limited technical understanding to manage the complexities.Įlectronic crossovers can be purchased as a rack mount unit 2-way, 3-way for stereo but rarely as a stereo 4-way. Active systems are often used for high-powered professional applications. An extra amplifier and speaker for sub-bass. Most electronic people have limited electro-acoustic knowledge. People who make speakers systems rarely have electronic knowledge. Active systems require technical skill to set up correctly. Also most sound engineering courses are superficial with little or no meaningful electro-acoustic content.Īn active system incorrectly set up will perform worse than a passive system. The primary problem is greed, ego, ignorance, fear of technology and lack of education. Merchandisers gain greater control in how they profit from a sale by selling speakers, cable and amplifiers separately. The Pro-audio market is mostly driven by brand image and trends, rather than technology. This may sound silly but these fraudulent business practices are real and highly profitable. Magical speakers connected to magical amplifiers with magical cable producing a magical sound which only they can hear. Audiophile retailers make greater profits marketing magic and mystical components, not technology. Traditionally, the audio retail market had been opposed to selling active systems, but this is changing. For an active system to be compact and affordable the amplifiers can be included within the speaker cabinets. A correctly set up active sound system has greater clarity and realism and free from inter-modulation distortion. The auditory difference between an active and passive speaker system is noticed by everyone. The line level signal from the pre-amplifier or mixer is electronically filtered into the correct frequency bands to be sent to independent amplifiers that drive the bass speaker, mid speaker and tweeter separately. Active systems can be 2-way, 3-way, or 4-way.
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