Shure Incorporated
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• Bi-color channel activation and clipping LEDs
• Peak-responding output limiter with LED indicator
• Peak-responding output level meter
Operating Principles
The operating concept behind the SCM410 Automatic Mixer is Shure's proprietary IntelliMix® circuitry. Intellimix
delivers seamless automatic mixing by combining three separate functions:
• Noise Adaptive Threshold. Distinguishes between constant background noise (such as air conditioning) and
changing sound (such as speech) for each input channel. It continuously adjusts the activation threshold so that
only speech levels louder than the background noise activate a channel.
• MaxBus. Controls the number of channels that may be activated for a single sound source. One talker activates
only one channel, even if multiple microphones “hear” that talker.
• Last Mic Lock-On. Keeps the most recently activated microphone open until another microphone is activated.
Without Last Mic Lock-On, a long pause in conversation would cause all microphones to turn off, which would
sound as if the audio signal had been lost. Last Mic Lock-On ensures that background ambience is always
present.
IntelliMix is a registered trademark of Shure Incorporated.
Front Panel
Microphone Channel Gain Controls 1 - 4
Allows adjustment of microphone gain.
Input LED 1 - 4
Lights green when channel is active; lights red at 6 dB below clipping level.
Low-Cut Filter 1 - 4
Provides adjustable low-frequency rolloff (high pass), reducing presence of undesirable low-frequency signals.
High-Frequency Shelving Filter 1 - 4
Provides level boost or cut in mid/high-frequency region for reduced sibilance from vocal microphones, or to com-
pensate for off-axis coloration in lavalier microphones.
Output Level Meter
Six-segment LED meter indicates peak output signal level in dBu (0 dBu = 0.775V). The red LED illuminates when
the output is 6 dB below clipping. The last LED indicates limiter action.
MASTER Level Control
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