Speakers are generally divided into constant pressure speakers and constant resistance speakers, both have common ground, but also have many differences. Today we mainly to analyze the difference between the pressure speaker and the fixed resistance speaker, to see what the difference between them is, so that ordinary consumers can buy the speaker they want in the first time.
First, what is the constant pressure speaker?
The simple understanding of constant voltage speaker is to push the speaker with voltage. It is characterized by large output voltage, small current, applied in public places, as long as the speaker in parallel on an ordinary wire can be.
Two, what is the constant resistance speaker?
Constant resistance speaker is the general household AV power amplifier, with current to push the speaker. It is characterized by large current, small voltage, more use of home theater, KTV, stage.
Three, the difference between constant pressure speakers and constant resistance speakers
- Differences in output forms:
1), the constant voltage is not a certain voltage, but the output form is a constant voltage, which requires the rated voltage of the load. A constant voltage power amplifier is connected in parallel with multiple constant voltage speakers, as long as the total power does not exceed the total power of the constant voltage power amplifier.
2), constant resistance sound box requires a certain output load resistance. In the constant resistance speaker (power amplifier) if the load impedance changes, the power will change accordingly. An 8 ohm 100W fixed-resistance power amplifier with 4 ohm becomes close to 200W.
- Different application places:
What is the difference between constant pressure speakers and constant resistance speakers
1), constant pressure speakers are mainly used in public broadcasting in public places, because the distance between public broadcasting speakers and power amplifier is relatively far, and a power amplifier is usually connected to a number of small power speakers. In order to reduce the line loss, to avoid the system of a horn on or off the volume of other speakers, so the constant voltage power amplifier high voltage low current output (relative). Constant voltage connection power amplifier multiple speakers, as long as the speaker parallel on a common wire can be.
2), fixed resistance speaker is used for home background music, home theater, KTV, stage, because the distance between home background music, home theater, stage speaker and power amplifier is relatively close and do not need to connect a lot of speakers, so fixed resistance power amplifier high current low voltage output, connected power amplifier and audio should choose special speaker line.
- Difference in sound quality
Constant pressure speakers are used in large space where the sound quality is not very high. On the contrary, constant resistance speakers can only transmit within 100 meters due to the transmission limitation, so the sound effect is generally better in small space. Because of the use of transformers in the constant voltage speaker circuit, so its sound quality is affected to some extent. However, if the selection of high-quality broadcast speaker can improve the sound quality of the broadcast system.
How to distinguish constant pressure or constant resistance speakers
The back of the speaker marked voltage is a constant voltage speaker, marked resistance is a fixed group speaker. Generally speaking, fixed stop sound speakers are more common.
How to choose a constant pressure or constant resistance speaker
Usually choose the basic principle of constant pressure or constant resistance is: when the line is short, the number of speakers is less, the sound quality is higher, can choose the constant resistance mode transmission; When the cable length is longer (more than 100 MB, note: This is relative data), the number of speakers is large, and the sound quality is not high, you can select the constant voltage transmission mode.
