Rane MS 1B Microphone Preamp

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 new MS 1b features an improved maximum input and improved dynamic range specifications. The new design features the popular Burr-Brown mic preamp chip which boosts performance tremendously.

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. A Polarity switch and high-current cross-coupled output line driver round out the features.

The MS 1b 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 1b 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).

Specifications

Parameter	Specification	Limit	Units	Conditions/Comments
Input Impedance	10k	1%	ohms	Balanced 5k + 5k
Gain Range	18 to 66	typ.	dB
Phantom Power	+48	4%	volts	10 mA max.
..........Impedance	6.81k	1%	ohms	Each leg
..........Load Regulation	0.1	typ.	%	0 to 14 mA
..........RMS CM Noise	.003	typ.	%	% of Vout (10 to 10k Hz)
Max. Input Level	+10/-32	min.	dBu	Gain 18/60, balanced output
Equivalent Input Noise	-128	typ.	dBu	20 kHz BW, Rs=150 ohms, Gain = 60 dB
Signal to Noise Ratio	96	typ.	dB	20 kHz BW, Rs=150 ohms, Gain = 18 dB, re 4 dBu
Dynamic Range	120/95	typ.	dB	Gain 18/66
CMRR	80	typ.	dB	Rs=150 ohms, 120 Hz, Gain = 60 dB
Frequency Response
..........Gain 60 dB	45 to 200k	typ.	Hz	+0, -3dB
..........Gain 18 dB	30 to 200k	typ.	Hz	+0, -3db
THD+Noise (gain 60 dB)	.007 (Output=+20 dBu)	typ.	%	55 to 20k Hz, 20 kHz BW, Rl=10k ohms
THD+Noise (gain 18 dB)	.001 (Output=+20 dBu)	typ.	%	50 to 20k Hz, 20 kHz BW, Rl=10k ohms
Line Driver	Active Cross-coupled			Gain 5.2/6 dB typ. unbalanced/balanced
Max. Output Level	+22/+27	min.	dBu	Unbalanced/balanced, 2k ohm load
Output Impedance	50	1%	ohms	Each Leg
Signal Indicator	2/8	typ.	dBu	Unbalanced/balanced output, Green LED
Overload Indicator	14/20	typ.	dBu	Unbalanced/balanced output, Amber LED
Output Cable Length	300	typ.	meters	Belden 8451 or equivalent
Unit: Agency Listing
..........120 VAC model	Class 2 Equipment			National Electrical Code
	UL & CSA			Exempt Class 2 equipment
..........230 VAC model	CE-EMC			EMC directive 89/336/EEC
	CE-Safety			Exempt per Art. 1, LVD 73/23/EEC
Power Supply: Agency Listing				Class 2 Equipment
..........120 VAC model	UL			File no. E88261
	CSA			File no. LR58948
..........230 VAC model	CE-EMC			EMC directive 89/336/EEC
	CE-Safety			LV directive 73/23/EEC
..........100 VAC model	Built to JIS			Japan only
Power Supply Input	18 VAC w/center tap	10%	Vrms	Rane RS 1 supplied
Max Current Consumption	220		mA
Unit Size	1.65" H x 5.1" W x 4.25" D			(4.2 cm x 13 cm x 10.8 cm)
..........Weight	1 lb			(0.45 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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