It is often used in closed speakers for inversion to strengthen the strength and intensity of
Instead of the inverted duct, the low frequency response speed of the passive should be faster accurate, the low frequency diving depth deeper, is no noise like the traditional duct.
Material:The passive adopts ABS plastic, which is durable and has a long service life.
Tuning:Passive is usually used to adjust bass, so that designer can adjust the overall timbre of the speaker.
Usage:Passive is relative to . The , namely the unit, relies on electromagnetic drive produce sound, The passive is used in conjunction with the unit, using the spring sound caused of the to enhance effect.