The PHL 3900Nd is a 10" coaxial equipped with a neodym magnet system, it gives a high SPL (96dB/1w/1m) and a large frequency range (50 to 2500 Hz). This coaxial driver PHL 3900Nd is provided without the high frequency driver, then you can install the 1" troath compression driver you want. The coaxial PHL 3900 Nd is good in a 10 Litre bass-reflex box accorded at 80 Hz.

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