Manufacturers description
SCM810 8-Channel Microphone Mixer
This eight-channel automatic mixer features Shure's patented IntelliMix, which activates only microphones being addressed, minimizing poor audio caused by multiple open microphones. The SCM810 is designed specifically for installed sound applications.
Features include adjustable EQ per channel, 48 V phantom power, active balanced microphone - or line-level inputs, line-level outputs, highly RF resistant chassis and circuitry, complete logic control of microphone activation, linking capacity for up to 400 microphones, with an internal power supply. 120/230 Vac power.
Features
- Eight balanced mic-line input channels (Phoenix block connectors)
- One unbalanced 1/4" aux level input
- Eight unbalanced 1/4" direct line level outputs
- One balanced master line level output (Phoenix block connector)
- Selectable 48V phantom power per channel
- Level selectable peak output limiter
- Full rack width (single rack height)
Specifications
Specification Sheet (pdf)
- Measurement Conditions (unless otherwise specified):
- Line voltage 120 Vac, 60 Hz (SCM810) or 230 Vac, 50 Hz (SCM810E); full gain; 1 kHz, one channel activated; source impedances: Mic 150 ohms, Line 150 ohms terminations: Line 10 kilohms, Phones 300 ohms (tip-sleeve and ring-sleeve), Direct Out 10 kilohms; Auto mode, equalization controls adjusted for flat response
- Frequency Response (Ref 1 kHz, channel controls centered)
- 50 Hz to 20 kHz +/- 2 dB; -3 dB corner at 25 Hz
Voltage Gain (typical, controls full clockwise)
-
| Input |
Output |
| Line |
Headphones |
Direct Out |
Low-Impedance
Mic (150 ohms) |
80 dB |
88 dB |
34 dB |
| Line |
40 dB |
48 dB |
-6 dB |
| Aux |
44 dB |
52 dB |
-- |
| Send/Return |
20 dB |
28 dB |
-- |
- Inputs
-
| Input |
Impedance |
Input
Clipping Level |
Designed
for use with |
Actual
Typical |
| Mic |
19-600 ohms |
1.6 kilohms |
-15 dBV |
| Line |
≤2 kilohms |
10 kilohms |
+22 dBV |
| Aux |
≤2 kilohms |
10 kilohms |
+22 dBV |
| Send/Return |
≤2 kilohms |
10 kilohms |
+18 dBV |
- Outputs
-
| Output |
Impedance |
Output
Clipping Level |
Designed
for use with |
Actual
Typical |
| Line |
>600 ohms |
60 ohms |
+18 dBV |
| Headphones |
8-200 ohms
60 ohms
recommended |
300 ohms |
+12 dBV |
| Direct Out |
>2 kilohms |
1 kilohm |
+18 dBV |
| Send/Return |
>2 kilohms |
1 kilohm |
+18 dBV |
- Total Harmonic Distortion
- <0.1% at +18 dBV output level, 50 Hz to 20 kHz (through 20 Hz-20 kHz filter; Input 1 and Master at 5, all other controls full counterclockwise)
- Hum and Noise
- Equivalent Input Noise: -125 dBV (150 ohm source; through 400 Hz - 20 kHz filter)
- Equivalent Input Hum and Noise: -123 dBV (150 ohm source; through 20 Hz - 20 kHz filter)
- Output Hum and Noise (through 20 Hz to 20 kHz filter; channel controls full counterclockwise))
- Master full counterclockwise: -90 dBV
- Master full clockwise: -70 dBV
- Common Mode Rejection
- >70 dB at 1 kHz
- Polarity
- Mic/Line, Send inputs to all outputs are non-inverting; Aux input to all outputs is inverting
- Input Channel Activation
- Attack Time: 4 ms
- Hold Time: 0.4 s (switchable to 1.0 s)
- Decay Time: 0.5 s
- Off-Attenuation
- 15 dB (switchable to infinity)
- Overload and Shorting Protection
- Shorting outputs, even for prolonged periods, causes no damage. Microphone inputs are not damaged by signals up to 3 V; Line and Monitor inputs by signals up to 20 V
- Equalization
- Low-frequency: 6 dB/octave cut, adjustable corner from 25 to 320 Hz
- High-frequency: +/- 6 dB at 5 kHz, +/- 8 dB at 10 kHz, shelving
- Limiter
- Type: Peak
- Threshold: Switchable: off, +4, +8, +16 (dBm at output)
- Attack Time: 2 ms
- Recovery Time: 300 ms
- Indicator: Lights red when limiting occurs
- Input LEDs
- Green on channel activation, red at 6 dB below clipping
- Phantom Power
- 46 Vdc open-circuit through 6.8 k series resistance per DIN 45 596
- Operating Voltage
- SCM810: 120 Vac rated nominal (see Voltage Selection for 230 Vac operation in User Guide), 50/60 Hz, 200 mA
- SCM810E: 230 Vac rated nominal (see Voltage Selection in User Guide for 120 Vac operation), 50/60 Hz, 100 mA
- Temperature Range
- Operating: 0 degrees to 60 degrees C (32 degrees to 140 degrees F)
- Storage: -30 degrees to 70 degrees C (-20 degrees to 165 degrees F)
- Overall Dimensions
- 44.5 mm H x 483 mm W x 317 mm D (13/4 x 19 x 121/2 inches)
- Net Weight
- 4.3 kg (9 lb 9 oz)
Description
SHURE INTELLIMIX AUTOMATIC MIXERS
SCM810E/ SCM410E
The SCM810E is a rack mounting 1U automatic mixer with advanced logic capabilities and linking ability for control of up to 400 microphones. Like the FP410E, the SCM810E uses Shure ‘Intellimix’ circuitry to activate microphones for speech but not background noise, ensure that only one microphone opens for each source and keep the last used microphone open for constant ambient noise. The SCM810E also has circuitry to reduce the overall level as the number of open microphones increases, to minimise the risk of feedback, individual channel direct output and adjustable EQ, and logic control for cough buttons, remote status indication and loudspeaker muting. Front panel controls remain reassuringly straightforward, with a channel gain control with bi-colour LED indicator, aux input jack with level control, master level control, bargraph level display and phones socket and level control. EQ presets are recessed and all other controls are on rear panel switches or logic connector.
The SCM410E is identical, other than having only four channels.
Technical Specification:
|
Max gain: | Mic: 80dB (34dB direct out) Line: 40dB (–6dB direct out) |
|
Max line gain: | 40dB line out: –6dB direct out |
|
Input clipping: | Mic: –15dBV; line, aux: +22dBV |
|
Phantom power: | +46V DC switchable per channel |
|
Equalisation: | LF: 6dB/oct 25–320 Hz: HF: ±8dB at 10kHz, shelving |
|
Output clipping: | Line, direct: +18dBV; phones: +12dBV |
|
Frequency response: | 50Hz–20kHz ±2dB |
|
THD: | <0.1% at +18dBV output 50Hz–20kHz |
|
Input noise: | –125 dBV 150R |
|
Automatic operation: | |
|---|
|
Switch on time: | 4ms |
|
Hold time: | 0.4s/switchable to 1.0s |
|
Decay time: | 0.5s |
|
‘Off’ attenuation: | –15dB/infinity switchable |
|
Peak limiter: | Off, +4, +8, +16 dBm switchable |
|
Dimensions: | 483(w) × 44.5(h) × 317(d) mm |
|
Weight: | 4.3 kg |