Links to parts of this video:
- What determines the power handling capacity of a speaker? 1:18
- How is the trick to do the potency assessment 3:16
- About the speaker used in the test 4:24
- What is necessary? 7:33
- Understanding the movement of the cone 10:04
- Taking the measurement 12:48
- Considerations, conclusions and warnings 19:18
The real power of a loudspeaker needs to be determined in the laboratory, in an acoustically treated room, with calibrated microphones and various measuring instruments. This is the so-called dynamic test, done with the speaker running. But we can do it in a static test, at home, with simple instruments. The static test is not so accurate but it allows us, in practice, to approximately determine the usable power of a loudspeaker.
Bass speakers end up determining the power of a soundbox. When it comes to a new speaker, it's simple to read the manufacturer's technical specifications to get an idea of how much power it can handle.
However, it may be impossible to find out the power when it comes to old speakers, because the manufacturer's data sheet no longer exists or it is unreliable. Doubts can also remain when it comes to refurbished speakers, a common thing in retrofitting vintage speakers.
It was to solve situations like this that we ended up developing the trick shown in this video. Using everyday tools and instruments on an electronics bench, we can determine (roughly speaking) what the real power of a loudspeaker is and from this we can indicate which type of amplifier is most compatible with it.
1 авг 2024