These professional passive Hifi stage speakers are durable and suitable for medium-sized activities, events and parties. Both speaker boxes are designed with two bass reflex holes, which can extend the frequency response to the lowest range and provide bass. These are produced by 2 heavy-duty 8-inch (20 cm) woofers whose bass relief membrane contributes to avoiding destructive local vibrations. The bass is especially suitable for dancing and music activities under the background of heavy bass. Each enclosure contains high output woofer to produce a professional quality sound. The stable shell with protective corners and metal grille protects the speaker box from physical influences during assembly, modification and disassembly. The recessed handles on both sides can be transported comfortably. You just need to connect the speaker to the amplifier or receiver with the standard speaker wire.

The sound amplifier listening and observing package enables you not only to hear sounds of any volume over 100 meters and even record them, but also to follow objects optically with no need of using extra monoculars. With this sound simplifier listening device at hand, even the faint singing of birds can also easily be detected. The built-in digital recording chip can be used for recording for 12s, playback or copy the file onto a standard audio tape for preservation.Designed with a powerful optical zoom viewfinder function with a magnification of 8x, you are able to follow objects optically with no need of using extra monoculars. Lightweight and running on a 9V battery (not included in delivery), it is easy to carry from place to place. This high-quality sound amplifier listening and observing device is definitely a surprise for every opera-lover, bird watcher, animal observer, etc.