Shure SCM820-DB25 Digital IntelliMix Automatic Mixer
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Overview
8-channel mixer designed for use in speech applications, including sound reinforcement, broadcasting and audio recording.
Description
The Shure SCM820-DB25 Digital IntelliMix Automatic Mixer is an 8-channel digital automatic mixer designed for use in speech applications, including sound reinforcement, broadcasting and audio recording. It uses Intellimix technology to dramatically improve audio quality in any application where multiple microphones are required and to select channels to open to the mix bus, while attenuating other channels. It comes with a DB25 connector with 8 inputs.
Key Features:
IntelliMix technology
- Delivers seamless automatic mixing and reduced background noise through dynamic channel gating and attenuation
- NAT (Noise Adaptive Threshold) continuously adjusts the activation threshold for opening a channel
- Number of Open Microphones Attenuation (NOMA) determines the amount of gain attenuation for a mix output when the number of active microphones changes
- Last Mic Lock-On (LMLO) keeps the most recently activated microphone open until another microphone is activated
- MaxBus ensures that only one channel is opened per sound source, reducing comb filtering for clear and intelligible speech
- IntelliMix Modes offer five different mixer mode presets of reliable automixing styles (Classic, Smooth, Extreme, Custom, or Manual) to quickly tailor the mix for a particular application
Enhanced I/O Support
- DB25 connector with 8 inputs
- Per-channel direct outputs allows the mixer to be used as an insert processor
- Mix A and B outputs with selectable mic or line level connect to a sound reinforcement system, mixing console, or recording device
- Dual mixer operation enables routing of independent automixes to the mix A and B outputs, allowing two entirely different mixes to result from the same set of inputs
- Aux inputs on both the front and back panel easily connect to media players
- 1/4" (6.35mm) stereo headphone output for channel solo and mix monitoring
Comprehensive Control
- Channel control knobs allow quick adjustment of gain, limiter, and AEQ settings, and solo/mute functions on input channels
- Output mix controls and metres enable front-panel master gain and limiter control as well as signal monitoring
- LED metre rings display input audio or IntelliMix gain levels for each channel
- Browser-based control software delivers comprehensive software control, monitoring, routing, and configuration of all signals and settings and adds a parametric 8-band AEQ
Advanced Networking
- Standard Ethernet networked audio configuration
- Control system compatible (AMX, Crestron)
Specifications
| Analogue Performance | |
| Channel Input Level Monitoring | Configuration: Active Balanced Impedance: 5 kΩ Clipping Level: Line (-0): +20 dBV, Mic (+26): −6 dBV, Mic (+46): −26 dBV |
| Phantom Power | 48 VDC, selectable per channel, 14 mA maximum
|
| AUX Input | Configuration: Stereo, Unbalanced Impedance: 10 kΩ Clipping Level: +10 dBV |
| Output Connectors (Analogue) | Mix Output Configuration: Active Balanced Impedance: 350 Ω Clipping Level: Line (±0): +20 dBV, Aux (−20): 0 dBV, Mic (−46): −26 dBV
|
| Output | Direct Configuration: Impedance Balanced Impedance: 150 Ω Max Output Level: +20 dBV
|
| Headphone Output | 1/4" (6.35 mm) TRS, 100 mW, 350 Ω, dual mono (will drive stereo phones) |
| Connector | DB25 |
| Signal Processing | |
| Convertor | 24-bit, 48 kHz, 113 dB dynamic range typical |
| Internal Processing | 32-bit |
| Latency | Analogue to Analogue Single Device: 0.51 ms In a Link Group: 0.76 + 4TN
|
| Processing | Channel Input: Gain Adjustment Range: −110 to +18 dB Low Cut: Corner: 25 Hz to 320 Hz, Slope: 12 dB/octave High Shelf: Corner: 5 kHz, Slope: 12 dB/octave, Gain: −18 to +18 dB Mix Output: Gain Adjustment Range: −110 to +18 dB Low Shelf: Corner: 25 Hz to 20 kHz, Slope: 12 dB/octave, Gain: −18 to +18 dB High Shelf: Corner: 25 Hz to 20 kHz, Slope: 12 dB/octave, Gain: −18 to +18 dB 6-Band PEQ: 25 Hz to 20 kHz, ±18 dB, Bandwidth: 1/70 to 4 octaves Limiter: Ratio: 10:1 Threshold: −50 to −2 dBFS Attack: 0.1 ms Decay: 100 ms |
| Networking | |
| Network Interface | Single Port, 10/100 Mbps Ethernet |
| Cable Requirements | Cat 5e or higher, shielded, 328' (100 m) maximum |
| Network Addressing Capability | DHCP, link-local, static |
| General | |
| Dynamic Range | Analogue to Analogue: 110 dB (20 Hz to 20 kHz, A-weighed, typical) |
| Output Noise | Output Pad Line (+0): -90 dBV Aux (-20): -110 dBV Mic (-46): -135 dBV at 20 Hz to 20 kHz, A-Weighted, one channel open |
| Equivalent Input Noise | Input Gain Setting Line (+0): -93 dBV Mic (+26): -118 dBV Mic (+46): -130 dBV at 20 Hz to 20 kHz, A-Weighted, input terminated with 150 Ω, digital gain at +18 dB |
| THD + N | < 0.05 % 1 kHz, +4 dBu out, mix output (Master) at +0 dB |
| Common Mode Rejection Ratio | > 70 dB 150 Ω balanced source, at 1 kHz |
| Polarity | Non-inverting, any input to any output |
| Housing | Steel; Extruded aluminium |
| Power Requirements | 100 to 240 VAC, 50 to 60 Hz, 1 A |
| Operating Temperature Range | 0 to 145°F (-18 to +63°C) |
| Storage Temperature Range | -20 to +165°F (−29 to +74°C) |
| Dimensions (H x W x D) | 1.7 x 19.0 x 11.4" (43.1 x 482.6 x 289.5 mm) |
| Weight | 12.0 lb (5.4 kg) |
In The Box
- Shure SCM820-DB25 Digital IntelliMix Automatic Mixer.
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Details
- Product: Shure SCM820-DB25 Digital IntelliMix Automatic Mixer
- Manufacturer: Shure
- Model: SCM820-DB25
- SKU: SCM820-DB25
- RM Product #: 65799
- Warranty: 2 year manufacturer warranty (excluding consumable e.g. lithium-ion batteries).
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