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d&b audiotechnik B4 15 Inch 12 Inch NL4 Dual Passive Subwoofer 100708587 (1) Volume control Custom TAB Funkenwerk AMI (1) Volume control 29 of which are user definable The cardioid dispersion pattern resulting from this approach avoids unwanted energy behind the system that greatly reduces the reverberant field at low frequencies and provides the greatest accuracy of low frequency reproduction Nominal impedance: 6 Ω
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