SCM810 Eight Channel Automatic Mixer

8-channel automatic mixer improves audio quality in any application in which multiple microphones are required. Features include fast microphone selection, adjustable EQ, adjustable low-frequency roll off, and peak-responding output limiter.

AI Mode Conversation: shure scm810 detailed descriptionshure scm810 detailed descriptionThe Shure SCM810 is a professional 8-channel automatic analog microphone mixer engineered specifically for installed sound applications such as boardrooms, civic chambers, panel presentations, and broadcast environments. Its core purpose is to dramatically improve audio quality in settings where multiple microphones operate simultaneously, solving common acoustic issues like phase cancellation, feedback, and excessive ambient room noise. [1, 2, 3, 4, 5]Core Patented TechnologyThe standout capability of the Shure SCM810 relies on Shure's patented IntelliMix® technology, which offers hands-free audio management through three key logic features: [1, 2, 3]

• Noise Adaptive Threshold: It differentiates between steady background room noise (like HVAC systems) and speech signals. The activation threshold continuously self-adjusts so that only active speech triggers a microphone. [1]
• Max Bus: It restricts channel activation to one microphone per talker. Even if multiple microphones pick up a single speaker's voice, only the closest microphone activates, eliminating comb filtering. [1]
• Last Mic Lock-On: This circuit keeps the most recently addressed microphone open when no one is talking. This prevents the "pumping" effect of total silence and maintains natural background room ambiance during pauses. [1, 2]
• NOMA (Number of Open Microphones Attenuated): The mixer automatically scales down the master output gain as more microphones are activated, preventing system feedback. [1, 2]

Physical Connectivity & I/ODesigned for seamless integration into structural audio racks, the hardware includes a broad range of flexible inputs and outputs: [1, 2]

• Inputs: 8 balanced mic/line-level channels using removable Euroblock (Phoenix) connectors. It also features one front-panel 1/4" auxiliary input with its own volume control for media playback devices.
• Outputs: 8 independent 1/4" direct outputs (one per channel) for routing isolated microphone tracks directly to external recorders or zone monitors. The master output features a balanced Euroblock connector switchable between mic and line level.
• Phantom Power: Individually selectable 48V phantom power is available on all 8 primary channels to support condenser microphones.
• System Expansion: Built-in 1/4" Link In/Out jacks allow users to daisy-chain multiple units together. A combined network can support up to 400 microphone channels operating under the same IntelliMix logic. [1, 2, 3, 4, 5, 6, 7, 8]

Channel Controls & Logic Capabilities

• Per-Channel EQ: Each channel features a dual-band equalizer with a low-frequency roll-off (low-cut filter) to eliminate bass rumble and a high-frequency shelving control to normalize the tonal differences between lapel, boundary, and handheld microphones.
• Advanced Logic Terminals: The back panel houses a DB25 logic connector providing custom external gate control. System integrators can use these terminal pins for microphone mute switches, speaker-muting relays (to prevent local feedback), or camera-switching systems that follow the active speaker.
• Master Limiter: An integrated, peak-responding output limiter prevents clipping and system distortion, complete with selectable thresholds and a front-panel indicator light. [1, 2, 3, 4]

Technical Specifications SummarySpecificationDetailMixer TypeAnalog Automatic MixerForm Factor1U Rackmountable (19" full width)Dimensions1.75" Height × 19" Width × 12.5" DepthWeight9.56 lbs (approx. 4.3 kg)ChassisHeavy-duty, highly RF-resistant metal constructionCommon Mode Rejection>70 dB at 1 kHzPower RequirementsSCM810: 120 Vac; SCM810E: 230 Vac (internal power supply)