The advantage of column array
Column speaker of Inter-M basically has the character of line array so it can be provide high sound pressure as 3 dB that is half of amount of decreasing sound pressure compared with one unit speaker. In case of cell speaker, the space that can be influenced by direct sound pressure is small due to the pattern of vertical but the column speaker can cover the large location such as lobby, exhibition, amusement park, museum and so on because it is possible to send output far away.
Outdoor speaker of waterproof and moisture proofing
The column speaker of Inter-M for outdoor is designed for producing of optimal performance even in poor circumstance. And this speaker can be performed over IP-34 level so it can be prevent the break-down and change of speaker even if the speaker is used for long time. In case of CU-900 series, in-closure is made by Aluminum and composed of the waterproof units so it produces rich quantity sound at the shore area and location where the product can be corroded.
The combination of speaker and amplifier
In the past Commercial Audio system, same speaker was installed for emergency and announcement so the output range of amplifier was installed according to the output range of speaker. However, present Commercial Audio system was utilized for not only broadcasting but also for BGM. Therefore, the higher output of amplifier and speakers are needed for clear announcement and more dedicated music sound. The output of amplifier should be installed twice bigger than output of speaker for high quality and clear sound.