User manual RANE MS 1B

[. . . ] DATA SHEET / MANUAL 5. 1" MS 1b MICROPHONE STAGE General Description The Rane MS 1b Mic Stage preamplifier provides the answer when you need just one microphone input in an otherwise line-level world. Give us a call to go from either a dynamic, condenser or electret microphone to a line-level input with a minimum of noise, distortion, cost and hassle. The MS 1b provides 48 V switchable Phantom Power with indicator LED, continuous rotary Gain trim between 18 dB and 66 dB, Signal/Overload LED, and XLR balanced Input & Output connectors. [. . . ] Hz Hz % % +0, -3dB +0, -3db 55 Hz to 20 kHz, 20 kHz BW, Rl=10 k 50 Hz to 20 kHz, 20 kHz BW, Rl=10 k Gain 5. 2 / 6 dB typ. unbalanced / balanced Unbalanced / Balanced, 2 k load Each Leg Unbalanced / Balanced output, Green LED Unbalanced / Balanced output, Amber LED Belden 8451 or equivalent Specification 10k 18 to 66 +48 6. 81k 0. 1 . 003 +10 / -32 -128 96 120 / 95 80 Limit 1% typ. Each leg 0 to 14 mA % of Vout (10 Hz to 10 kHz) Gain 18 / 60, balanced output 20 kHz BW, Rs=150 , Gain = 60 dB 20 kHz BW, Rs=150 , Gain = 18 dB, re 4 dBu Gain 18 / 66 Rs=150 , 120 Hz, Gain = 60 dB Conditions/Comments Balanced 5k + 5k Data Sheet-2 MS 1b MICROPHONE STAGE Block Diagram +48 V PHANTOM POWER SIGNAL / OVERLOAD INVERT MIC INPUT 3 1 2 RFI FILTER +6 dB LINE LEVEL 2 3 OUT 1 GAIN 12-60 dB Application Information Uses and applications for the MS 1b should be obvious. But then again, it's obvious to us our taxes are too high and nothing is being done about that. With this in mind, perhaps a few words on using the MS 1b might not be wasted. This is equivalent to an electronic simulation of a transformer output. When running a long cable back to the mixer, run a linelevel balanced line rather than a mic-level line. The compact MS 1b can mount closer to the microphone, provide a local volume control (or not, just pull the knob off), while the stronger signal minimizes RF and hum irritations. Unbalanced lines are usually quiet under 10 feet (3 meters), but longer runs will introduce the hum and interference you are trying to avoid. When you must drive an unbalanced device with the MS 1b's balanced output, keep the cable short, and connect pin 2 to the "+" or "hot" lead, and tie pin 3 and ground together at the shield. MIXING The MS 1b is designed to fill the need for adding a microphone channel to line-level mixers, such as the Rane SM 26B or SM 82. Many installations using either of these products invariably wind up with one unused input that would do the job perfectly if only it could operate at mic-level. DIGITAL RECORDING AND SAMPLING Another handy use for the MS 1b is in recording applications. Many popular products do not have a high enough quality mic preamp to suit the resolution of the digital processing electronics. Using the ultra low noise MS 1b to bring the mic inputs up to extremely high quality line-level is an easy and affordable solution for this dilemma. [. . . ] Make sure that these units are grounded either to another chassis which is earth grounded, or directly to the grounding screw on an AC outlet cover by means of a wire connected to a screw on the chassis with a star washer to guarantee proper contact. Please refer to RaneNote, "Sound System Interconnection" (supplied with your manual and available at www. rane. com) for further information on system grounding. ©Rane Corporation 0802 47th Ave. W. , Mukilteo WA 98275-5098 USA TEL 425-355-6000 FAX 425-347-7757 WEB www. rane. com Data Sheet-4 All features & specifications subject to change without notice. [. . . ]