The UltraMonitor delivers the final word on high-powered, critical monitoring. Specifically designed for touring reinforcement, the highly accurate, rugged UM-1C biamplified system consists of proprietary 12-inch low-frequency driver in a vented enclosure, and a symmetrical pattern 60-degree high-frequency horn with driver.

The UM-1C Ultramonitor operates as a system with the M-1A Control Electronics Unit (one per channel). Optimized for the UM-1C and UPA-1C loudspeakers and pre-aligned at the factory, the M-1A contains frequency response and phase response alignment circuitry, and Meyer Sound's exclusive SpeakerSense driver protection circuitry, incorporating both peak and RMS signal limiting.

M-1A Control Electronics Unit

The UM-1C UltraMonitor operates as a system with the M-1A Control Electronics Unit (one per channel). Optimized for the UM-1C and UPA-1C loudspeakers and pre-aligned at the factory, the M-1A contains frequency response and phase response alignment circuitry, and Meyer Sound’s exclusive SpeakerSense driver protection circuitry, incorporating both peak and RMS signal limiting.

A single-channel device operating at line level, the M-1A is the final component in the signal chain before the amplifier.

SpeakerSense driver protection circuitry protects the UM-1C loudspeaker components from damage due to overheating under high power conditions. This unique circuit continuously monitors the power applied to the UM-1C drivers, and individually limits the highfrequency and low-frequency outputs when the safe operating limits of the drivers are exceeded. Until the onset of overload, the SpeakerSense circuitry has no effect on the signal.

Also provided is a switch-selectable Safeguard function, which widens the safety margin of the system and is intended to be used when extended periods of overload are anticipated. The Safeguard switch and other setup controls are located behind a cover plate on the M-1A front panel, providing a means of securing the system installer’s presets.

To enhance the effectiveness of the UltraMonitor in stage monitoring applications, the M-1A incorporates sliding filters which band-limit the system response under full-power conditions. This has the effect of discriminating for vocal information in the signal to increase clarity, and is particularly useful when onstage levels are high and leakage becomes a problem. For this reason, it is recommended that subwoofers be used with the system if it must pass the full audio frequency range at all times (as, for example, in keyboard or drum monitors). The preferred choice of subwoofer for the UltraMonitor is the Meyer Sound USW-1.