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What are the benefits of digital processors?
time2020/12/24
- You may find that the digital processor basically has the function of frequency division. At the same time, the frequency division frequency is displayed in digital form, which is clear at a glance and makes people understand it. Moreover, the accuracy of frequency division and the signal-to-noise ratio of the signal are greatly improved. Up.
Let's take the bdx 260 digital speaker processor as an example for comparison.
What are the benefits of digital processors?
You may find that the digital processor basically has the function of frequency division. At the same time, the frequency division frequency is displayed in digital form, which is clear at a glance and makes people understand it. Moreover, the accuracy of frequency division and the signal-to-noise ratio of the signal are greatly improved. Up.
Let's take the bdx 260 digital speaker processor as an example for comparison.
If we need to build a four-way high-end audio system, after 2 standard full audio signals are input to the bdx 260 digital speaker processor, we can divide it into four frequency bands and provide it to different speakers to work:
1. The first channel of the bdx 260 digital speaker processor output signal is provided to the subwoofer speaker. The working frequency range is set at 30Hz-150Hz, and the crossover point is set at about 90Hz.
2. The second channel of the bdx 260 digital speaker processor output signal is provided to the bass speaker. The working frequency range is set at 130Hz-450Hz, and the crossover point is set at about 220Hz.
3. The 3rd and 4th channels of the bdx 260 digital speaker processor output signal are provided for low-mid-range speakers. The working frequency range is set at 400Hz-800Hz, and the crossover point is set at about 500Hz.
4. The 5th and 6th channels of the bdx 260 digital speaker processor output signal are provided for mid- to high-pitched speakers. The working frequency range is set at 750Hz-20000Hz, and the crossover point is set at about 2000Hz.
You can find that the use of digital processing can set an optimal operating frequency range after setting a crossover point. Such a precise frequency division cannot be achieved by the analog circuit in the electronic frequency divider.
Of course, the working frequency range and crossover point in the above examples are not fixed, and fine adjustments should be made according to the speakers and sound field.
Problems to be aware of when using a divider
1. Crossover point: If in a 2-way audio system, the adjustment of the crossover point does not actually depend on the bass speakers, but the mid- and high-range speakers.
Because the bass speakers can work below 300Hz, but some mid-to-treble speakers have too small a speaker diameter and insufficient dynamic range. They must work above 200Hz to ensure their safety. If the crossover point is around 130Hz at this time, then these The mid-to-treble speakers are dangerous when they work.
2. Volume control: Regardless of whether it is input level or output level, there must be a degree when adjusting, and do not turn it on too much.
If the volume knobs on the frequency divider are turned to a large extent, and the sound pressure of the system is not enough, then adjust the level of the signal in front of the frequency divider or adjust the level and volume attenuation switch of the amplifier below the frequency divider. .
Pay special attention to this, otherwise the signal in the frequency divider will be distorted and the lower-level equipment will be easily damaged.
3. There is a button on some crossovers: X10 button, please be careful not to press it randomly.
For example, if our crossover point is adjusted to 200Hz, pressing this button 200 X 10 will become 2000Hz, so unless it is necessary, generally do not press this button.
4. Some crossover rear panels have a bass mode option, which can synthesize two stereo signals into one output, which can reduce the sound interference between low speakers.
You can use it appropriately. Of course, if the bass crossover point is higher, then the sound from the subwoofer will have a certain degree of directivity. At this time, it should work better in the state of 2 stereo signals.
5. Stereo working mode and mono working mode: At present, most of the crossovers we use are divided by two. Considering flexibility and versatility, the rear panel of these crossovers generally has a stereo and mono Working mode switch.
If this switch is placed in mono working mode, then this crossover will change from a dual-channel 2-way crossover to a single-channel 3-way crossover.
Therefore, unless necessary, do not easily switch this working switch, otherwise the frequency signal output by the signal output port behind the crossover will be very different! The lighter ones deteriorate the sound quality, the more serious ones can damage the equipment!
6. The output of the bass signal in the system must not be confused with the output of the mid-to-treble signal, otherwise the treble signal is given to the woofer speaker, and the bass signal is given to the tweeter speaker. In this way, there is really no sound in the audio system. Because the frequency is wrong! Maybe it will burn out the speakers!
7. Whether the main speaker is frequency-divided: The above mentioned whether the main speaker needs to go through crossover, everyone should have their own opinions. If you don’t understand, you can compare and test several times before you decide. Don’t be blind when you don’t understand make decision.
8. When using a digital processor for frequency division, be sure to distinguish which is the frequency division point and which is the operating frequency range.
In addition, there will be a choice of frequency attenuation strength at the starting point and ending point of the working frequency range, such as 6dB, 12 dB, 24 dB, 48 dB, several options, we have to use it flexibly, generally 24 dB is more appropriate .
