Speakers that can handle the full optimal range are referred to as "full range". However, there are common frequency ranges that will work well in many cases. Crossovers take a signal from your mixer that is a left and right channel, and separates them so you can separate signals to different speakers based upon frequencies. Indeed, Crossover processing systems (and better Subwoofer designs) include protection to keep from sending TOO LOW frequency audio to the Subwoofer. Recent design trends are for power to be decreased to -6dB (1/4) to each speaker at the crossover point. The more expensive (and usually larger) Subwoofers can extend that low end down to, say 15Hz. Meaning you may have to step up to a larger, more expensive model to handle the size of your listening room. If you have bookshelf speakers. The result isn't satisfactory because of the reported suckout around 80/90 Hz. Those frequencies below 30 Hz are the ones you FEEL rather than hear! When using multiple amplifiers or a multi-channel amplifier, you're going to want to choose a crossover point. And what's the top end (and low end) the Subwoofer can handle? At the crossover point sound comes from 2 sources and on-axis directivity is increased. That might not sound like much of a difference below 30Hz, but it REALLY IS a big deal! OK, if you've followed me so far, you should now be convinced you need at least one Subwoofer in your Home Theater setup (maybe MORE than one) -- budget and physical space allowing, of course. For domestic use at low power crossing tweeters over between 2kHz - 3kHz is often done in 2 way systems. Live Sound Reinforcement ... (To calculate how long an audio wave is, divide the speed of sound—1,130 ft./second—by the frequency. Again, setting the sub's crossover control to the 80-Hz position is a good place to start. At 40 Hz and below, the Subwoofer is carrying the audio. (If you DO have speakers which plug in to wall power, and have driver elements specifically designed and amplified for Bass (at VOLUME), then what you've got your hands on is a speaker with a Subwoofer built into the same cabinet! I mentioned up top using multiple Subwoofers (perhaps in lieu of one single, larger Subwoofer) could have additional advantages beyond simple convenience. And the challenge of Bass Management lies in taming these problematic, Bass Room Response issues. But bass doesn't stop there! Copyright ©2018-2021 Bob Pariseau. The reason is that something called phase distortion generates around each filter's crossover frequency, muddying up the sound. This goes back to the concept of Bass frequencies "pressurizing" the entire volume of space in the listening room. So their different locations are not a problem, and can, in fact, produce other benefits! The impact will vary both by Bass frequency and listening position. A good Rule of Thumb is you don't want your Crossover to be higher than 100 Hz. First, they want their Subwoofers to be LOUD. So if you have a Crossover which begins at 80 Hz, and takes effect at a rate of -12dB per octave, that means the audio going to the regular speaker will be reduced four-fold by the time you get down to 40 Hz. When looking for the best audio crossover for your live sound rig, there is a few things to consider. This means at no additional cost to you, I get paid if you click through and make a purchase). 100 Hz sounds … While the type of crossover varies from model to model, one of the most common and best-performing is the 2nd order crossover with a slope of -12dB per octave. So you'll have a Subwoofer built into each such speaker, plus another, stand alone Subwoofer for LFE.). "Steering" bass from the regular speaker channels to the Subwoofer is the job of "Crossover" processing. Indeed some of those speakers are likely on the opposite side of the room! Which Crossover Frequency do you pick? A Small speaker will be processed for Crossover. Visit my About page to read about who I am and what I do. The sub specs say it can play down to 25 Hz, which is very low, and the sub has a crossover adjustment that goes from 50 Hz to 150 Hz. The default crossover frequency is "80Hz". Bass Control computes the best possible results for the crossover frequency that is assigned by default but the user has to choose it... so that some experimentation is possible and in some cases necessary. So the LOWER limit for the Crossover Frequency would be TWICE the bottom end of your regular speakers. First, this keeps the Bass safely non-localizable. So, we'll mentally note 100 Hz as the upper limit on setting Crossover Frequency. Finding just the right crossover frequency is the first step in achieving good integration. The result isn't satisfactory because of the reported suckout around 80/90 Hz. 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