The default crossover frequency is "80Hz". (Which of course is how crossovers work!). I hope you’ve found my post helpful, clear, informative, and most of all what you were looking for. They have nearly the same things in common except that home stereo speakers are usually placed in a speaker box (speaker cabinet/enclosure) while car speakers may be installed separately in many cases. And both woofers and tweeters are 8 ohm. Unlike electronic crossovers, normally they’re connected to the outputs of an amplifier and then to the speakers you’d like to use. Hi there, as you can see from the diagrams in the link I sent, yours is likely a 2nd order (-12dB/octave) crossover. That is, the volume your ears perceive is measured in dB, too. While speaker crossovers connect directly to the higher-power output terminals of an amp and then to speakers, electronic crossovers work only with small signals. Sometimes it’s barely noticeable, other times it’s a problem. Great compromise between full-range sound and midrange bass capability. A graph of all the frequencies plotted versus level is the Frequency Response Curve (FRC) of the monitor. A “2nd order” crossover just means that the second stage of parts is used to make the crossover filter out the unwanted frequencies even more effectively. I'm a car audio fanatic and degreed electrical engineer. For example, using an 8 Ohm home speaker crossover with a 4 Ohm car speaker won’t work correctly. The phase crossover frequency is the frequency at which the phase angle first reaches −180° and thus is the point where the Nyquist plot crosses the real axis (Figure 12.12).On a Nyquist plot the (−1, j0) point is the point separating stability from instability. While you might think “the higher order, the better” would always apply, things get much more complicated once you get past 3rd or 4th order crossovers. Electronic and 2-way speaker crossovers are nearly always -12dB models. Low-pass outputs for bass: When used, this blocks the vocals and other higher frequency sounds that woofers and subwoofers can’t reproduce well. They work using passive components: capacitors and inductors. For math & engineering purposes most of the time we use the range of 20 to 20,000 Hertz (20 to 20 KiloHertz, or 20 thousand Hertz). That’s because the part values were chosen for one impedance only. As you might have guessed, the larger the steepness (greater the slope), the more effective the crossover is at filtering out bass sent to a tweeter, as an example. Are you sure that’s a second order? In engineering school we used to design frequency filters that would be high-pass filters, that would block any frequencies below a certain high frequency, while letting anything above it pass through. New improved version of the crossover calc this now includes a graphical plot of the frequency response. Changing the Crossover Frequency: To change the crossover frequency in a passive crossover, you need to change at least 2 components (in a 12dB/octave crossover) if you want the shape of the slope to remain constant. ... the lack of a crossover, the Quads 57 or 63’s speak with one voice and the tone and color of each instrument is correct, go to a box speaker and you lose so much of the correct color tone, and size. In reality, depending how a given DVD is mixed, there can also be deep, powerful bass in any of the speaker channels. By replacing the amplifier with a voltage source, the approximate equivalent circuit of the crossover network is shown in Fig. Hey there, I’m glad you liked it! Set the crossover point 10 Hz higher than the low end of your speaker’s tolerance range. Examples of very common 2-way speakers you’ll find in either car or home stereos (in addition to other types as well). Changing the crossover frequency just changes the frequency of the null. Here’s the very book I learned a lot from myself. :). I have been trying to figure out and failed, if a Subwoofer with a Frequency Response ranged between 20Hz-130Hz can actually play sound of 20Hz or maybe 25Hz if the Amplifier has a Frequency Response range between 10Hz-50Hz and with a Crossover Frequency between 40Hz-500hz? So you could for example have the Low Pass section with a 8 ohm woofer, crossing over at 1200 Hz, and the High Pass at 16 ohms crossing over at 1800 Hz. What Does A Crossover Do? An octave is a doubling or halving of a frequency number. In any case, I’m not getting the right numbers with what I’m trying. I should mention that what I’m thinking about trying, is putting in some new tweeters and set the crossover to around 3000-3500. :). This means the speaker will receive less and less of the speaker signal that we want to block. When we talk about “frequency” we’re referring to a number range for the human ear. 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