Patent ID: 9173031
Filing Date: 2015-10-27
Classification: H04R

Abstract:
1. An apparatus for amplification of audio content, the apparatus being powered by a host device with a plurality of data output connectors, the apparatus including: a first power line connectable to a first connector of the plurality of data output connectors; a second power line connectable to a second connector of the plurality of data output connectors; a first amplifier connected along the first power line and a second amplifier connected along the second power line; and a first coil driver and a second coil driver coupled to the first and second amplifiers respectively, the first and second coil drivers being arranged such that magnetic summation occurs when the first and second coil drivers are energized; wherein the magnetic summation causes the apparatus to attain a second sound pressure level (SPL) rating which is higher compared to a first SPL rating when only the first power line is connected to the first connector.