Boenicke W11 LoudspeakerSpecification Sensitivity: 86 89 dB watt m, depending on frequency Nominal impedance: 6 ohms (drops to 2 ohms below 120 Hz in case loudest bass setting is chosen). Standard Version 10 long throw flat carbon fibre honeycomb bass driver, tuned to 27 Hz, first order crossover 6 custom made wood cone bass midrange driver, 1st order low pass filter, no high pass filter, ash tree phase plug, magnet structure force fit mounted to the whole wooden mass of