The Shure SCM268 4 Channel Microphone Mixer in black is a professional-grade mixer designed for live and studio audio setups. With 4 microphone inputs, 4 line inputs, this mixer offers plenty of connectivity for various audio sources. It also features phantom power for condenser microphones, a 4-band equalizer for adjusting audio levels, and fader-type control for precise volume adjustments. Compatible with MP3 and CD players, this mixer is a versatile and reliable option for a wide range of audio applications.
SYSTEM FEATURES
S Four transformer-balanced microphone inputs
S Transformer-balanced output—switchable mic/line level S Five –10 dB line-level inputs
S Six-segment LED output level meter
SPECIFICATIONS
Measurement Conditions (unless otherwise specified): Line voltage 120 Vac, 60 Hz (SCM268) or 230 Vac, 50 Hz (SCM268E); full gain; 1 kHz, one channel activated; source impedances: Mic 150 Ω, Aux Level 150 Ω; terminations: Line 600 Ω, Mic 600 Ω, Aux Out 10 kΩ. 12 V phantom power off.
Frequency Response (Ref 1 kHz, controls centered)
Microphone Inputs: 150 Hz to 20 Khz ±2 dB (built-in 80Hz low-cut)
S Built-in 12-volt phantom power
S Internal power transformer
S Built-in low-cut filter on microphone inputs (below 80 Hz)
Outputs Output
Mic Line Aux Out
Impedance
Designed for use with
low-Z inputs >600 Ω >2 kΩ
Actual (typical)
0.2 Ω 72 Ω 870 Ω
Output Clipping Level
–21 dBV +18 dBV +7 dBV
Auxiliary Inputs: 20 Hz to 20 kHz ±2 dB Low-Cut Filter (Microphone inputs only)
3dB down at 80 Hz, 6 dB/octave
Gain (typical, controls full clockwise)
Total Harmonic Distortion
Input
Low-impedance mic (150 Ω)
Aux Level
Inputs
Input
Mic Aux Level
Mic
38 dB 3 dB
Output Line 76 dB
40 dB
Aux Out
65 dB 29 dB
Input Clipping Level
–5 dBV >28 dBV
<0.25% at +4 dBu output level (through 22 Hz-22 kHz filter; Input 1 and Master centered, all other controls full counter- clockwise)
Hum and Noise
EquivalentInputHumandNoise ............... –124dBV (150 Ω source; through 22 Hz - 22 kHz filter)
Output Hum and Noise (through 22 Hz to 22 kHz filter; chan- nel controls full counterclockwise) Masterfullcounterclockwise .................... –92dBV Masterfullclockwise........................... –70dBV
Common Mode Rejection
>80 dB at 1 kHz
Polarity
All inputs to all outputs are non-inverting
Overload and Shorting Protection
Shorting outputs, even for prolonged periods, causes no dam- age. Microphone inputs are not damaged by signals up to +10 dBV; Auxiliary inputs by signals up to +36 dBV
Phantom Power
12 Vdc open-circuit through 340Ω series resistance
Impedance
Designed for use with
19-600 Ω ≤2 kΩ
Actual (typical)
1.2 kΩ 21 kΩ
E2002, Shure Incorporated TL1028(BH)
SCM 268 TRANSFER BALANCED MICROPHONE MIXER Specification Sheet
Operating Voltage
SCM268: 100–120 Vac rated nominal, 50/60 Hz, 60 mA
SCM268E: 220–240 Vac rated nominal, 50/60 Hz, 30 mA
Temperature Range
Operating ................... –7° to49°C(20°to120°F)
Storage ....................–29°to74°C(–20°to165°F) Overall Dimensions
44 mm H x 218 mm W x 162 mm D
(1.72 x 8.60 x 6.37 inches)
Net Weight
1.20 Kg (2 lbs, 10 oz)
Certifications
SCM268: UL & cUL Listed by Underwriters Laboratories, Inc. SCM268E: Eligible to bear CE Marking. Conforms to Euro- pean EMC Directive 89/336/EEC. Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residential (E1) and light industrial (E2) en- vironments.
Line (Power) Cords:
....... SCM268:100–120Vac(US/Canada)
....... SCM268E:220–240Vac(EU)
Fuse, SCM268 (5x20 mm, 250V, 80mA, slow- blow)
Fuse, SCM268E (5x20 mm, 250V, 40mA, slow- blow)
Hardware Kit
Link Bars (Bracket)
Single Mount Kit
Dual Mount Kit
Optional Accessories Line (Power) Cord, 230–240 Vac (UK)
Line (Power) Cord, 230–240 Vac (UK)
95A8762 95A8778 80A730
80J258
90AA8100 53A8443 53A8484 53B8484 95A8713
95A8713
