The Prima APBX 10 AS2 active subwoofer, with 10-inch driver,features a dedicated high performance amplification module which enhances all the passive box technologies, such as the 2S² (2 Sides / 2 Sounds) design, the Plug & Play terminal block and ultra-compact size.

The amplification module, with power outputs of 400W RMS is developed with he-li technology (high efficiency / low impedance), which thanks to the absence of the DC-DC voltage booster reaches the impressive 90% efficiency level, very close to the theoretical limit of the D-Class.