MXL 990 / 991 - Manual (Page 2)

Marshall Electronics, Inc.
Product Innovation Through Technical Excellence!
1910 East Maple Ave. El Segundo, CA 90245
Phone: (310) 333-0606 Fax: (310) 333-0688 E-Mail:[email protected]
Internet:
www.MXLmics.com
Thank you for purchasing the MXL 991 Condenser microphone. With proper care, this mic will provide
many years of satisfaction. For best results, please take a few moments to review this literature.
General Characteristics
This microphone has a gold-sputtered diaphragm and a fixed cardioid pickup pattern. Condenser
microphones are very sensitive, readily revealing very subtle sonic details. They also tend to pick up sounds
outside the pattern more than some designs, which can lead to powerful feedback if you are not careful. We
strongly advise experimentation with placement and isolation requirements with the gain initially set low to
avoid equipment (and ear) damaging surprises!
Power Requirements
IMPORTANT - This unit requires phantom power at 48 volts, +/- 4 volts. Each unit has been thoroughly
checked before shipping, so if you hear no sound, check that the phantom power on your mixer or separate
power supply is switched on!
Microphone Cables
The microphone cable can have a profound effect on the sound of any microphone. Even the finest
microphones will sound poor if the interconnect cable allows noise to enter, or causes distortion and loss of
information. Use only the best microphone cable your budget will allow.
Care
Dust and foreign material can degrade the performance of a microphone over time so always store the unit
in its case.
TECHNICAL DATA
Type:
Condenser pressure gradient mic
Frequency Range: 30Hz-20kHz
Polar Pattern:
Cardioid
Sensitivity: 10mV/Pa
Impedance: 200
ohms
S/N Ratio: 80dB (Ref. 1Pa A-weighted)
Equivalent Noise 18dB(A weighted IEC 268-4)
Max SPL for
0.5% THD:
134dB
Power
Requirements:
Phantom Power 48V ±4V
Current
Consumption: <3.0mA
Size:
22 mm x 130 mm
Weight: 220g
Metal Finish: Champagne
Warranty
Marshall microphones are guaranteed against defects in material and workmanship for one year from date
of purchase. Should you encounter any problem with this unit, promptly contact the company you
purchased it from for assistance. The original dated sales receipt will be necessary for any warranty claim.
Do not send any unit directly to us without prior authorization from our service department! Warranty
coverage is limited to repair or replacement (at our option) of the microphone, and does not cover incidental
damages due to use of this unit, nor damage caused by accidental misuse of this product.