1.active mini line array,loudspeaker,pro sound,pa system 2.light weight,easy install 3. ... active subwoofer is the result of combination of low distortion loudspeaker technique, linear amplification technique, and DSP audio processing technique. Input ... an integrated system.Model: RS-400 active mini line array, loudspeaker, pro sound, pa system ComponentLF: (8"×2) x1pcMF/HF: (4 ...