Abstract: A speaker stacking structure includes a speaker, the speaker having two bearing walls at two sides of the speaker cabinet thereof, a plurality of locating blocks respectively symmetrically fastened to the bearing walls of the speaker, each locating block having a plughole, and a plurality of fastening members insertable into the plugholes of the locating blocks to join two speakers in a stack.

Abstract: An audio mixer includes a console, which has a base with an indication face, and different sizes of mounting holes and knob holes, a sound signal processing unit mounted inside the console, a sound signal input zone, which defines multiple sound signal input blocks and has connectors respectively mounted in the sound signal input blocks corresponding to the mounting holes of the console, a sub-control zone, which divides multiple sub-control blocks and has sub-control knobs respectively mounted in the sub-control blocks and the knob holes of the console and electrically connected to the sound signal processing unit, and a main control zone, which defines a main control block, and has an indication provided in the main control block and a main control knob greater in size than the sub-control knobs and electrically connected to the sound signal processing unit and disposed above the indication face of the console.

Abstract: A speaker stacking structure includes a speaker, the speaker having two bearing walls at two sides of the speaker cabinet thereof, a plurality of locating blocks respectively symmetrically fastened to the bearing walls of the speaker, each locating block having a plughole, and a plurality of fastening members insertable into the plugholes of the locating blocks to join two speakers in a stack.

Abstract: A speaker box mounting structure includes a holder base having a mounting plate for fastening to a wall or ceiling, a swivel arm set coupled to the holder base and adjustable relative to the holder base to a desired direction and angle, a coupling unit coupled to the swivel arm set, the coupling unit having a base, a coupling portion disposed at the base, and two stop faces disposed at two sides of the coupling portion and defining a contained angle, and a speaker box having a coupling portion coupled to the coupling portion of the coupling unit, and two stop faces disposed at two sides and respectively stopped against the stop faces of the coupling unit.

Abstract: A megaphone includes a speaker housing, a centric tube, and an illuminating device. The speaker housing has a mouth portion, a head portion connected to the mouth portion, and a power supply. The centric tube has a tube body, a coupling portion connected to a midsection of the speaker housing, and a lamp mount formed at a front portion of the tube body. The illuminating device is mounted on the lamp mount of the centric tube, having a plurality of light emitting diodes (LEDs) that can be electrically connected with the power supply of the speaker housing to generate illumination.

Abstract: A display apparatus adapted to be mounted on an audio/video player or the like comprises a housing having a window. A backlight unit having a plate mounted in said housing and made of transparent materials which has a front surface and a back surface, and a plurality of reflecting pieces disposed on the back surface of said plate and being gradually enlarged by distance. A light set has a LED arranged beside the plate of the backlight unit nearby said the reflecting pieces of smaller sizes to emit light to the backlight unit and reflected by the reflecting pieces to the front surface of the plate. A screen is mounted in the housing and disposed in front of the front surface of the backlight unit corresponding in location to the window of the housing, the screen is capable of passing the light reflected by said backlight unit.

Abstract: A display apparatus adapted to be mounted on an audio/video player or the like comprises a housing having a window. A backlight unit having a plate mounted in said housing and made of transparent materials which has a front surface and a back surface, and a plurality of reflecting pieces disposed on the back surface of said plate and being gradually enlarged by distance. A light set has a LED arranged beside the plate of the backlight unit nearby said the reflecting pieces of smaller sizes to emit light to the backlight unit and reflected by the reflecting pieces to the front surface of the plate. A screen is mounted in the housing and disposed in front of the front surface of the backlight unit corresponding in location to the window of the housing, the screen is capable of passing the light reflected by said backlight unit.

Abstract: A rainproof and omnidirectional loudspeaker system comprises a base set, a plurality of fitting ring sets, at least one speaker, and an upper cover set. The fitting ring sets are stacked together on the base set. The fitting ring sets have a ring cover, which is provided with a through hole and a ring portion. The two adjoining ring covers are provided with a plurality of partitions disposed therebetween. Two partitions are provided with an empty portion located therebetween. The empty portion is shielded by the ring portion of the ring cover. The speaker is mounted in one of the fitting ring sets. The upper cover set is disposed on the topmost fitting ring set. The sound waves produced by the speaker are radiated into air in all directions via the through holes of the fitting ring sets and the empty portions. The ring covers serve to prevent intrusion of rain or foreign objects.

Abstract: A clip-type microphone comprises a main rod, a first clip set fastened with the main rod, a second clip set fastened with the main rod, an extension rod fastened with one end of the main rod, and a head fastened with one end of the extension rod. The head of the microphone is located in proximity of the mouth of a user of the microphone. The main rod is fastened to the garment of the user of the microphone such that the clip sets hold a specific part of the garment of the microphone user.