Patent ID: 9253570
Filing Date: 2016-02-02
CPC Classification: H03F,H04R

Claim Text:
1. A system comprising: a high audio driver carried by a canalphone housing; a low audio driver carried by the canalphone housing adjacent to the high audio driver; an amplifier that amplifies an audio signal and delivers that amplified audio signal to at least one of the high audio driver and the low audio driver, the amplifier being non-destructively removable by a user; a passive audio crossover carried by the canalphone housing, the passive audio crossover receives the amplified audio signal from the amplifier and then delivers the amplified audio signal in a suitable frequency range to at least one of the high audio driver and the low audio driver; a second amplifier; a high portion of the passive audio crossover carried by the canalphone housing, the high portion of the passive audio crossover to receive the audio signal from the second amplifier and to limit the audio signal delivered to the high audio driver to a high frequency portion of the amplified audio signal; a gain control for the audio signal that controls the second amplifier, the gain control regulates an output to input ratio of the amplifier and the second amplifier; and a second gain control for the audio signal that controls the amplifier.