US Patent No. 9,154,883

LOW RISE SPEAKER ASSEMBLY HAVING A DUAL VOICE COIL DRIVER


Patent No. 9,154,883
Issue Date October 06, 2015
Title Low Rise Speaker Assembly Having A Dual Voice Coil Driver
Inventorship Christopher Wilk, Sunnyvale, CA (US)
Assignee Apple Inc., Cupertino, CA (US)

Claim of US Patent No. 9,154,883

1. A speaker assembly comprising:
an enclosure having an acoustic chamber and an acoustic output opening; and
a speaker driver having,
a sound radiating surface,
a first voice coil and a second voice coil positioned along opposite faces, respectively, of the sound radiating surface,
a first magnet assembly having an elongated gap in which part of the first voice coil is positioned to vibrate, and
a second magnet assembly having an elongated gap in which part of the second voice coil is positioned to vibrate,
wherein the first magnet assembly elongated gap is orientated lengthwise toward the acoustic chamber, and the second magnet
assembly elongated gap is oriented lengthwise toward the acoustic output opening.