Shure M267 User Guide English

OutputsOutputMicrophoneIMPEDANCEDesigned forUse WithAny low impedancemicrophoneinputActual(Internal)OutputClipping Level0.5 –34 dB(20 mV)Mix Bus 3.5 kΩ 3.5 kΩ –8 dBV(400 mV)Headphones8 - 2000 Ω200 Ωrecommended400 Ω to3 kΩ∗∗+10 dBV(3.3 V)Line 600Ω 150Ω +18 dBm(6.2 V)∗∗Depending on level control settingNoiseEquivalent Input Hum and Noise: –126 dBV (low impedancemicrophone, 150 Ω - 20-20,000 Hz) into a600 Ω load at full gainOutput Noise: –75 dBV (master control fully counterclockwise),–53 dBV (master fully clockwise), (input controlsdown, 300-20,000 Hz)Output Hum and Noise: –70 dBV (master controldown), –51 dBV (master control up) (input controlsdown, 20-20,000 Hz)Distortion0.35% or less THD from 30 to 20,000 Hz at +15 dBmoutput; 0.5% or less IM distortion up to +15 dBm outputlevelCommon Mode Rejection65 dB minimum with input of –20 dBV at 100 HzControl InteractionLess than 1 dB with any control combinationOverload and Shorting ProtectionShorting the outputs, even for prolonged periods, willcause no damage; microphone inputs will not be damagedby signals up to 3 voltsLo-Cut FiltersLimiter6 dB/octave rolloff at 150 HzThreshold: +15 dBm (line output level; adjustablefrom –4 to +18 dBm)Attack Time: 3 msec typicalRecovery Time: 500 msec typicalPeak IndicatorLights 6 dB below clipping or at onset of limiter actionHeadphone Output Clipping Level3.16V (+10 dBV) into 200 ΩTone Oscillator1,000 Hz, 1.5% or less THDPhantom Power30 Vdc open-circuit, 3.3 kΩ series resistance, inputswitches in MIC position onlyOperating VoltageAc Operation: 120 or 240 volts ±10%, 50/60 Hz,9.5W, internally switchableDc Operation: 27 volts nominal at 15 mA typical nosignal,18 mA typical at 0 VU (+4 dBm) output withheadphone load; 21.5 volts minimumBattery life: approximately 20 hours with alkaline batteriesat +4 dBm output in continuous use; three 9-voltbatteries, type NEDA 1604A (Duracell MN1604 recommended)Supplied wired for 120 Vac operation (See Service section for 240Vac operation)Temperature RangeOperating: –18 o to 57 o C (0 o to 135 o F)Storage: –29 o to 71 o C (–20 o to 160 o F)DimensionsWeightSee Figure 1Net:309 mm(12 5 / 32 in.)FIGURE 12.3 kg (5 lb 2 oz)Packaged: 3.2 kg (7 lb 2 oz)Certifications68.8mm(2 23 / 32 in.)6.3 mm( 1 / 4 in. )229 mm(9 in.)Listed by Underwriters’ Laboratories, Inc., and listed byCanadian Standards Association as Certified2