Stereo headset with angled speakers

Stereo loudspeaker system

Stereo loudspeaker system with tweeters mounted on rotatable enl

Strap-shaped input device

Structural assembly for housing an acoustical system

Structural improvements of earphone signal cord

Structure around a speaker unit and applied electric or...

Structure for adjusting position of microphone on microphone...

Structure for changing sound quality of speaker

Structure for earphones with multiple sound tracks

Structure for the sound coil of loudspeaker

Structure of a loudspeaker

Structure of a picture-frame type loudspeaker

Structure of a receptacle for earphone wire

Structure of a wearable and hands free earphone

Structure of an earpiece clamp

Structure of dual magnetic loop type receiver

Structure of speaker

Structure of speaker

Structure of speaker