BRODMANN ACOUSTICS JB155

摘要

Brodmann's claim of 91 dB for '1.05W sensitivity' for the JB155 begs the question of input voltage. Our 87.7dB pink noise figure for 2.83V (1W/8ohm) shows that, for its size, the JB155 is not notably sensitive - this despite its 4ohm rated impedance, which is (almost) consistent with our measured minimum modulus of 3.1 ohm. Impedance phase angles are modest, though, so the EPDR (equivalent peak dissipation resistance) drops to a minimum of 1.8ohm at 138Hz, making the JB155 no more challenging to drive than many a smaller floorstander.