Features

• -127 dB Equivalent Input Noise
• Gain Control
• Signal / Overload Indicator
• Polarity Switch
• Switchable 48 V Phantom Power
• True Differential Input
• Cross-coupled Line Driver
• Internal 100-240 VAC Power Supply

• MS 1S Mic Stage

  The Rane MS 1S 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 1S provides 48 V switchable Phantom Power with an indicator LED, continuous rotary Gain trim between 15 dB and 60 dB, Signal/Overload LED, and XLR balanced Input & Output connectors. A Polarity switch and high-current cross-coupled output line driver round out the features.

  The MS 1S utilizes one of the finest ultra low noise amplifier designs available. Featuring a true differential input with high common-mode rejection, use of the MS 1S guarantees performance usually found only in mixing consoles costing thousands of times as much. Of course, for all of that extra money you receive a proportional increase in KPSI (knobs per square inch).

  The MS 1S replaces the MS 1B Mic Stage with a new internal universal power supply. The width increases by one inch -- all other features are the same.

  

  The MS 1S has CSA certification in the US and Canada.

• MS 1S Applications

  Uses and applications for the MS 1S 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 1S might not be wasted.

  BALANCED USE
  The MS 1S provides a true cross-coupled balanced output. This is equivalent to an electronic simulation of a transformer output. Rane follows the AES standard of pin 2 = hot. When running a long cable back to the mixer, run a line-level balanced line rather than a mic-level line. The compact MS 1S 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 USE
  Balanced use is recommended to minimize noise. 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 1S'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 1S is designed to fill the need for adding a microphone channel to line-level mixers, such as the Rane SM 26S or SM 82S. 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. In rides the MS 1S to the rescue.

  DIGITAL RECORDING AND SAMPLING
  Another handy use for the MS 1S 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. Such irony. Using the ultra low noise MS 1S to bring the mic inputs up to extremely high quality line-level is an easy and affordable solution for this dilemma. No garbage in; no garbage out. Clippity-clop; clippity-clop.

  MICROPHONE TYPES
  The available gain and large input range of the MS 1S allows the use of virtually any type of microphone. True 48V phantom power guarantees the MS 1S works with every microphone. The better the mic, the better the MS 1S sounds.

  Ah, the sound of the thundering hoofs is deafening.

  BLOCK DIAGRAM

  

• MS 1S Specifications

   

  Parameter	Specification	Units	Conditions/Comments
  Input Impedance	2k	Ω	Balanced
  Gain Range	15 to 60	dB
  Phantom Power	+48	volts	10 mA max
  ..........Impedance	6.81k	Ω	Each leg
  Max. Input Level	+9 / -35	dBu	Gain 15 / 60, balanced output
  Equivalent Input Noise	-127	dBu	20kHz BW, Rs=150Ω, Gain=60dB
  Signal to Noise Ratio	94	dB	20kHz BW, Rs=150Ω, Gain=15dB, re 4dBu
  Dynamic Range	114 / 91	dB	Gain 15 / 60
  CMRR	80	dB	Rs=150Ω, 120 Hz, Gain = 60 dB
  Frequency Response	3 to 200k	Hz	+0, -3db
  THD+Noise (gain 60 dB)	.004 (Output=+20 dBu)	%	55 to 20k Hz, 20 kHz BW, Rl=10 kΩ
  THD+Noise (gain 15 dB)	.0006 (Output=+20 dBu)	%	50 to 20k Hz, 20 kHz BW, Rl=10 kΩ
  Line Driver	Active Cross-coupled
  Max. Output Level	+18/+24	dBu	Balanced, 2 kΩ load
  Output Impedance	94	Ω	Each Leg
  Signal Indicator	-11	dBu	Balanced output, Green LED
  Overload Indicator	+20	dBu	Balanced output, Amber LED
  Output Cable Length	300	meters	Belden 8451 or equivalent
  Unit: Agency Listing	CSA C/US		247105
  ..........Max Power	3	W	C5 cord included
  ..........Line Voltage	100-240	VAC	50 / 60 Hz
  Unit Size	1.64" H x 6.8" W x 4.26" D		(4.2 cm x 17.3 cm x 10.8 cm)
  ..........Weight	1 lb, 1 oz		(0.5 kg)
  Shipping Size	3.6" H x 11.75" W x 7.2" D		(9.5 cm x 30 cm x 18 cm)
  ..........Weight	4 lb		(1.8 kg)

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