Marshall Electronics MXL 990 - Page 2

Pressure-Gradient
Condenser Microphone
990
Contents
Care
Unpack your MXL microphone package carefully and verify that all of the following items
are included:
• MXL 990 Mic
• Custom Shockmount
• Mic Stand Adapter
• Carrying Case
If any of these items are missing or damaged, contact the company from which you
purchased the microphone.
Dust and foreign material can degrade the performance of a microphone over time,
so always store the unit in its box. For vocals closer than 3”, use a pop lter or a foam
windscreen to avoid getting moisture on the diaphragm as this can substantially
degrade the microphone’s performance. Store the microphone in its original
packaging in a cool, dry place along with the included packet of silica gel.
Thank you for choosing the MXL 990 Pressure-Gradent Condensesr Microphone. For
best results, please take a few moments to read this manual and familiarize yourself
with proper operation and care of this microphone.
Frequency ChartPolar Pattern
Type: .................... Pressure gradient condenser microphone
Capsule: .......................................................... 6 micron gold-sputtered
Frequency Response: ...................................................... 20 Hz – 20 kHz
Polar Pattern: ......................................................................................Cardioid
Sensitivity: ........................................................................................... 15mV/Pa
Max SPL for .5% THD: ...........................................................................130 dB
Impedance: ......................................................................................200 ohms
Equivalent Noise Level: ............20 dB (A-weighted IEC 268-4)
Power Requirements: ....................Phantom power 48V (+- 4V)
Size & Weight: .60mm x 130mm / 2.36 in. x 5.11 in 544.3g / 1.2 lbs
Metal Finish: ..............................................................................Champagne
Technical Specications
General Characteristics
This microphone has a 22mm capsule with a gold-sputtered diaphragm and a xed
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) damage. It is strongly advised to use
a mesh pop-lter to avoid moisture from damaging the capsule.
Power Requirements
IMPORTANT - This unit requires phantom power at 48 volts, +/- 4 volts, in order to operate.
Each unit has been thoroughly checked before shipping, so if you do not hear sound,
check that the phantom power on your mixer or separate power supply is switched on.
Microphone Cable
The microphone cable can have a profound effect on the sound of any microphone.
Even the nest microphone will sound poor if the interconnect cable allows noise to
enter or causes distortion and loss of information. We recommend that you use the best
microphone cable that your budget will allow.
Shock Mount
The MXL shock mount can shift in shipment. Simply shift the nylon bands to center the
microphone in the assembly. Be sure that the wire clamp does not rest on the chassis of
the mount, as this impairs mechanical isolation. Slide the mount all the way to the rim
of the microphone for the most secure hold.