Audio Pro (Sweden) 音響公司
ACE-Bass 技術 link
80年代使用小單體 (6.5" or 8") 產生超低失真及超低頻. PHILIPS 也有 MFB 技術.
Audio Pro B2-50 Subwoofer Bassystemet that goes nail straightlily down to 20Hz with extreme low distorsion link
Frekvensgång: 20-200 Hz within ±1,5 dB
It all started back in the eighties with the AudioPro B2-50 a small dedicated subwoofer with two 6,5″ woofers capable of doing 20Hz at realistic levels. link
Audio Pro A4-14 Mk2 link
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