STS Msub - Subwoofer autoamplificado con tecnología M-FORCE de Powersoft - YouTube
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Doctor ProAudio.com (el DoPA)
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AUDIOFOCUS - AudioFocus TS40 infra sub powered by Powersoft M-Force moving magnet linear motor structure! Peak SPL at 1m : 150 dB Frequency range (-10dB) : 20 Hz - 80 Hz Official