Talking about the matching skills and precautions of power amplifier and speaker

1. Impedance matching

1. When the tube power amplifier (tube amplifier) ​​is matched with the speaker, the output impedance of the amplifier should be equal to the impedance of the speaker, otherwise it will reduce the output power and increase the distortion. Fortunately, most amplifiers have variable output impedance matching interfaces such as 4-8-16 ohms, and impedance matching with speakers has become simpler.

2. For the matching of transistor power amplifier (stone machine) and speaker impedance

① When the speaker impedance is higher than the output impedance of the power amplifier, there is no other effect except for the different degree of reduction of the output power.

② When the speaker impedance is lower than the output impedance of the power amplifier, the output power increases proportionally, and the distortion generally does not increase or the increase is negligible. However, the speaker impedance cannot be too low during matching, such as as low as 2 ohms (referring to when two 4 ohm speakers are connected in parallel). At this time, only the power amplifier has a large margin, and the high-power tube and multi-tube parallel push-pull with good performance are used. It has no effect on such power amplifiers. On the contrary, ordinary power amplifiers are generally not rich, and the pcm and lcm of the power amplifier tubes are not large. When the volume is turned on again, the distortion will increase significantly, and the box will be destroyed in serious cases. Pay attention.

Audio speaker supplier

 

2. Power matching

1. In principle, when the speaker's rated power is inconsistent with the power amplifier's rated power, for the amplifier, its power is only related to the speaker's impedance, not the speaker's rated power. Regardless of whether the speaker power is the same as the power of the amplifier, it has no effect on the work of the amplifier, but is only related to the safety of the speaker itself.

The invisible sound V2 subverts the traditional sound principle and is derived from the British NXT technology. It is different from the traditional cone-piston vibration method. It uses an innovative driving chip to drive the entire honeycomb panel sound surface, which can evenly distribute the sound 180 degrees in the entire space. Achieve 360-degree listening without dead ends, no matter where you are in the room, you can enjoy the pleasant sound. Built-in self-recovery insurance and filter circuit, effective protection in the state of sound distortion, laboratory test can effectively protect the speaker from being burned out.

2. If the speaker impedance meets the matching requirements, and the withstand power is less than the power of the amplifier, the driving power is sufficient, which sounds very comfortable. This is often said that the reserve power of the power amplifier must be large in order to fully express the full content of the music, especially the low frequency part of the music, which is more vivid and powerful. This is a good match.

3. If the rated impedance of the speaker is greater than the rated power of the power amplifier, although both can work safely, at this time, the power amplifier is not enough to drive the power, and the loudness will be insufficient, and it will often appear that it has been turned on to a saturated state and the distortion is aggravated. Powerless. This is a poor match.