The J8 is a 3-way design housing 2 x 12" LF drivers, one hornloaded 10" MF driver and two 1.4" exit HF Compression Driver
s with 3" voicecoils mounted to a dedicated wave-shaping device. The mechanical and acoustical design enables flown vertical columns of up to twenty-four loudspeakers to be suspended using vertical splay angles between them of 0deg to 7deg with a 1deg resolution. The cylindrical wave segments produced couple coherently in the vertical plane. Due to the dipolar arrangement of the neodymium LF drivers the exceptional 80deg horizontal constant directivity dispersion control is nominally maintained down to 250 Hz. The J8 is acoustically and mechanically compatible with the J12 loudspeaker. It can be used in columns of purely J8 loudspeakers or combined with J12s and / or with J-SUB
s. The J8 cabinet is constructed from marine plywood and has an impact and weather protected PCP (Polyurea Cabinet Protection) finish. The front of the loudspeaker cabinet is protected by a rigid metal grill, the side and rear panels incorporate four handles, and two EP5 or NL8 connectors wired in parallel are also mounted at the rear.
The J8 can only be driven by d&b's D12 dual channel amplifier configured for the J8. More detailed information on specific loudspeaker setups with the D12 amplifier is available either in the relevant loudspeaker or D12 manual.
Used d&b audiotechnik
d&b audiotechnik has been developing, manufacturing and distributing loudspeaker systems since 1981. The company operates internationally in the field of electroacoustics to produce high quality products for reinforcement of speech and music. Through the amalgamation of technological developments, system integration principals, quality of construction and standards of service, d&b pursues a systems approach that includes all aspects of design, development, manufacture and support. d&b's loudspeakers are used globally in rental and installation markets for events, multimedia, musicals, concert halls, theatres, opera houses, broadcast and everything from the smallest conference room to the largest stadium.
- Audio is the science and art of recording or reproducing sound through mechanical or electronic means. The field includes many disciplines, such as electrical engineering, acoustics, and music with de. Used . sign, installation and operation of sound recording and reproduction equipment as the focus. . Used . ...Color Changers
- A conventional lighting fixture with a remotely controlled colored changeable filter over the lens. There are three kinds of mechanisms used in color changers, a wheel with lens sized holes into which. Used . colored gells can be placed, multiple fixed filters that can be moved in and out of the beam to mix the colors and a scroller which uses continuous, usually dichroic, filters to mix an even . Used . greater number of colors.
- A circular truss is a truss that is shaped like a circle and generally used in large open venues where the stage can be viewed from many angles.. Used . . Used . ...Beamage
- The beam of light projected from lights as it appears in the air.. Used . . Used . ...Staging
- Staging is the process and art of selecting, designing, or modifying the performance space for a given purpose, be it theatrical, television, film or concert production. . Used . . Used . ...
Used Line Array Speakers
Line array speakers make up a loudspeaker system to create a sound source that produces an evenly distributed sound output. The driver of each line array element is close enough to the driver of the next element to create constructive interference. The resulting sound waves go farther than sound waves from traditional loudspeakers.
Line array systems date back to the early days of research in acoustics. Many old town halls and public venues still have old line source boxes which were found to project voice well though they are much smaller than horn-loaded speakers.
These days, line array speakers use different drivers for high-, mid- and low-frequency passbands that must be in line. Each enclosure must be set up closely to form columns composed of these drivers. To increase the frequency range and maximum sound pressure, the number of drivers per enclosure must be increased.
The orientation of line array speakers may vary. Vertical arrays are excellent for focusing sound at audiences without wasting output energy on ceilings or empty air above the audience because of its very narrow vertical output with a normally-wide horizontal pattern. On the other hand, horizontal line arrays have a very narrow horizontal output with a tall vertical pattern.
For hanging concert speakers which are usually part of a concert reinforcement system, enclosures are set up together using a specialized rigging hardware and they hang from a single point. These line array speakers are curved backward at the lower portion so that the sound will reach more audience.