Max. power
The maximum power of a short-term (up to several seconds) incoming signal that the speaker can withstand without physical damage. Just like the nominal power, it matters for the selection of acoustics for an amplifier (or vice versa): it is believed that the maximum power of the speakers should be at least 2 times higher than the maximum power of the signal source.
Frequency range
The total audio frequency range reproduced by all speaker speakers.
Obviously, this range should not be too narrow, so that the acoustics do not cut off the lower and/or upper frequency limits of the reproduced sound. At the same time, the human ear perceives sound within 16 Hz - 22 kHz, and it simply does not make sense to provide speakers with a wider frequency range. We also recall that in
mid-frequency acoustics and tweeters, reproducible frequencies are limited due to specialization (for more details, see "Type"). And the overall sound quality will depend not only on this indicator, but also on a number of other features.
External crossover
A crossover is a part of an acoustic system that divides the overall signal into separate frequency bands that are fed to the corresponding speakers (for more details, see “Number of Bands”). All multi-way speakers (component and coaxial, see “Type”) have their own crossover; it is usually placed directly in the speaker housing. However, in some models, usually the most advanced, the crossover can be made as a separate device, in its own housing. It is believed that
external crossovers provide better sound and introduce less distortion; in addition, they often provide the ability to fine-tune the sound.
