MP-1 Battery Powered Microphone PreamplifierGeneral Description:The MP-1 from Sound Devices is a portable, battery-powered microphone preamplifier with phantom power. Designed for high definition field production environments, this studio-quality mic pre is ideal for critical radio, television, and film applications.With its rugged mechanical and electrical construction, compact size and high quality components, the MP-1 is extremely durable and easy to use. This highly reliable mic preamp will provide years of superb audio performance under the most punishing field conditions.Features:Audio PerformanceMaximum of 66 dB of gain, adjustable in eleven discrete steps for accurate, repeatable gain settings. Dynamic range exceeding 120 dB20 Hz to 50 Hz audio handwidthHigh immunity to RF interference due to transformers, RF filtering, and all-metal constructionHigh current line output driver capable of driving very long cable runs.Transformer-balanced:Premium quality input transformer provides superior sonic quality and freedom from interference problems.Custom-designed output transformer provides line driving ability with freedom from interface problems.Limiter:Extended range peak limiter via dual opto-isolators makes unit virtually "unclippable"Battery Power:Internal battery power (two AA) for convenient, low cost powerBattery life greater than 24 hours (phantom power off)Durable Mechanical Construcation:High strength extruded aluminum chassis with protective metal end rails to withstand punishing field conditions.Easy access battery compartment for quick battery changes.Phantom power:Selectable 48-volt and 12-volt phantom power for condenser and dynamic microphones.High pass filter:Two selectable corner frequencies, 80 and 160 Hz, 6 dB per octaveSpecification:Gain:0 dB to 66 dB input to output, switch selectableGain Accuracy:+0.6, -0.1 dB with reference to front panel gain marking (150 ohm source, 100k ohm load impedances)Frequency Response:20 Hz - 22 kHz, +0.1, -0.5 dB, -1 dB at 50 kHz (relative to 1 kHz level with 150 ohm source)Equivalent Input Noise:-126 dBu (-128 dBv) minimum (150 ohm source, flat weighting, 22- 22 kHz bandwidth, gain setting 36 dB or greater)Output Clipping Level:+22 dBu minimum with 100k ohm load; +20 dBu minimum with 600 ohm loadInput Clipping Level:+4 dBu minimum at the 0 or +18 dB gain settingDynamic Range:122 dB minimum at the +18 dB gain settingTHD + Noise0.05% Maximum (from 60 Hz to 22 kHz @ +4 output level, 22 kHz filter bandwidth, +46 dB gain setting)Common Mode Rejection Ratio:100 dB minimum at 80 Hz; 60 dB minimum at 10 kHzInput:Transformer-balanced, 2000 ohm input impedanceOutput:Transformer-balanced, 130 ohm output impedanceLow Cut:80Hz or 160 Hz (switch selectable), 6 dB per octavePhantom Power:12V or 48V (switch selectable) per DIN 45 596 specificationLimiter:Limits to +17 dBu output level; 10:1 limiting ratio; 5 mS attack time, 100 mS release time; Amber/ Red LED indicates limiting/ clippingInternal Voltage Rails:+15 V and -15 V, regulatedPower:2 AA batteries, 24 hours life typical with +4 dBu signal into 600 ohms, no phantom powerPower LED:Green indicates power and good battery. Red indicates power and low battery. LED turns red when approximately 4 hours of battery life remain.Polarity:Mic input to line output is non-invertingOperating Temperature Range:0 to 70 degrees C (32 to 160 degrees F)Dimensions:43 mm x 94mm x 14mm (h x w x d) (1.7" x 3.7" x 5.5")Weight (unit only):0.56 kg (1.24 lbs)Weight (packaged):0.86 kg (1.90 lbs.)Certification:Meets FCC Part 15 Class B, Eligible to bear CE mark