P9R Battery Life and Earphones

Date Updated: January 7, 2011 FAQ #3818

Yes, as the impedance of earphones gets lower, the battery life gets shorter. Earphones with an impedance of 8 ohms will drain the battery faster that earphones with an impedance of 64 ohms.  As the load impedance approaches 0 ohms ("dead" short), the P9R output section draws more battery current to drive the lower impedance, thus shortening the battery life, often as much as 2 hours or more.