Issue 28



24 July 2015


With a commitment to ongoing security upgrades across the city, Brisbane City Council has just installed audio-based security cameras using Meyer Sound MM-4XP self-powered loudspeakers with IntelligentDC technology.

Lord Mayor Graham Quirk said the speaking cameras had recently been trialled in Brisbane’s CBD. “These audio-based cameras will allow us to intervene in real time, tell people if they are committing a criminal act, or something that is not convenient to other people that we are watching them,” he said. “And, if need be, that police are on their way.”

After the recent Fortitude Valley mall upgrade, integrator United Technology Solutions was engaged to complete the install of MM-4XP loudspeakers throughout the mall. With its weather-protection feature and ease of use, the MM-4XP has proven to be a winner for local integrator United Technology Solutions.

The MM-4XP loudspeaker’s proprietary 4-inch cone transducer, manufactured at Meyer Sound’s Berkeley, California factory, delivers an impressive maximum peak SPL of 113 dB and a wide operating frequency range of 120 Hz to 18 kHz with very low distortion. The MM-4XP exhibits the same high intelligibility and flat frequency and phase responses for which Meyer Sound loudspeakers are known. Peak and RMS limiters regulate loudspeaker temperatures and excursion, ensuring the MM-4XP performs exceedingly well even when driven into overload.’

With IntelligentDC technology, the MM-4XP receives power and balanced audio from a SwitchCraft EN3TM 5-pin male input connector on its rear panel. The sealed EN3 connector provides protection against harsh environmental conditions when the MM-4XP is installed outdoors. The MM-4XP’s amplifier and signal-processing circuits were designed to store DC power and tolerate voltage drops, thereby accommodating light-gauge cables and long cable runs. MM-4XP loudspeakers require a Meyer Sound external power supply. The compact MPS-481 powers a single loudspeaker and includes a composite cable that routes both DC power and balanced audio, received from its XLR input connector, to the MM-4XP. The MPS-488HP IntelligentDC power supply is ideal for larger installations with multiple loudspeakers; the single-space 19-inch rack unit distributes DC power and balanced audio to up to eight MM-4XP loudspeakers or other Meyer Sound low-voltage loudspeakers. Meyer Sound’s RMS remote monitoring system is available as an option for the MPS-488HP.


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Issue 28