QUADRAL AURUM VULKAN Ⅷ-R

摘要

Quadral claims 90dB sensitivity for the Vulkan Ⅷ-R but our pink noise figure of 89.0dB, 200Hz-20kHz, suggests that this is slightly optimistic. Specified impedance is 4-8ohm; if we take this as 4ohm nominal then that is consistent with our minimum modulus of 3.2ohm. I speculated with the Titan Ⅷ [HFN Nov '12] that impedance correction components had been fitted to the crossover; if so then the Vulkan benefits from not having them as the modulus is higher at low frequencies and phase angles reduced, and as a result the EPDR (equivalent peak dissipation resistance) falls to a relatively amp-friendly 2.0ohm at 38Hz, in contrast to the scary 0.8ohm min. of the Titan Ⅷ.