Micca
Micca MB42X-C Advanced Center Channel Speaker for Home Theater, Surround Sound, Passive, 2-Way (Black, Each)
Pyle
Pyle 4 Channel Speaker Selector Switch - Multi Zone A B Speaker Distribution Controller Box w/Independent Audio Source Volume Control, Supports Home Theater Stereo Amplifier Receiver System - PSLSW4
Catapult
Riddance: Or: The Sybil Joines Vocational School for Ghost Speakers & Hearing-Mouth Children
Human and Automatic Speaker Recognition over Telecommunication Channels (T-Labs Series in Telecommunication Services)