Output power: this does not need to explain it, attention and listening to the sound environment is space matching

Speaker unit: material and size, it is too long to start.

Signal to noise ratio: the ratio of the normal sound signal and the signal of no signal when the sound box is played back, the unit is dB (DB)

Distortion: as the name suggests, the lower the better, see Saida knew

Degree of separation: the separation of the left and right channels, some manufacturers also use the "crosstalk" concept, the two can be converted

Frequency range: Generally speaking, the bass is the speaker can be issued by the range.