MXL FR-310 User Manual

Note: Your recording device may have internal gain controls that may
need to be adjusted to get the best results. Consult your device’s user
manual for more information.

Switch #2 has three positions, which are labeled “Off,” “On” and “Roll-off.”

When this switch is in the “Off” position, the microphone is off and will not
draw power from the battery. The “On” position turns the microphone on
and sets it to record with no filtering. The “Roll-off” position sends the
signal through the microphone’s high-pass filter to reduce or eliminate
low-frequency noise. For example, older camcorders sometimes
produce low-frequency motor noise. The high-pass filter will reduce or
eliminate this noise.

Specifications

Transducer: 10mm Electret Condenser

Polar Pattern: Supercardioid

Frequency Response: 40Hz—20kHz

Output Impedance: 250 ohms

Power Requirements: 1.5V AAA Battery

Bass Roll-Off: -6 dB/octave at 150Hz

Gain: -5dB, 0dB, +5dB

Output Connector: 1/8" (3.5mm) Mini TRS

Output Signal: Mono

Battery Life: Up to 500 hours

Dimensions: 5.3" x 2.5" (135mm x 63mm)

Weight: 0.30 lbs (136 g)



Three-position

gain switch



Standard hot shoe mount



Solid metal construction

FR-310

Hot Shoe Mount Shotgun Microphone



Integrated windscreen



Bass roll-off

(high-pass filter)

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www.mxlmics.com

MXL FR-310

Thank you for choosing the MXL FR-310 video microphone. The FR-310 is
the perfect microphone for camcorders, high-definition digital SLR cameras
and portable recording devices. To get the best performance from your new
microphone, please take a few minutes to read this manual.

Features



Solid metal construction



Integrated windscreen



Three-position gain switch



Bass roll-off (high-pass filter)



Standard hot shoe mount

Power

The FR-310 is powered by an internal AAA battery. Use a fresh battery to
get the best performance from the microphone. We also recommend
carrying a spare battery.

A fresh battery should provide up to 500 hours of continuous recording.

A battery indicator light is located on the right side of the microphone.



When the indicator light is illuminated, the battery is close to running out

of life and should be replaced.



The light will not be illuminated when the battery is not close to running

out of life or when the microphone is turned off.



The indicator light will flash when the microphone’s power switch is

moved to the “On” position.

Note: Remember to turn the microphone off when it is not in use.

Installing the battery

Remove the battery cover on the side of the microphone by sliding it
backward. Insert the battery with the positive terminal facing the front
of the microphone. Replace the battery cover by sliding it forward
until it clicks into place.

Attaching the microphone

A standard hot shoe mount is located on the bottom of the FR-310.
Rotating the knurled tightening ring counterclockwise will make
mounting the microphone easier. Tightening the ring after the microphone is
securely in the camera’s hot shoe mount will improve stability.

The FR-310 is equipped with a captive signal cable that has a 3.5mm jack.
Insert the jack into the external microphone socket on your recording device.

Note: Some recording devices require changing the position of a switch
or changing the device’s settings to work with an external microphone.
Consult your device’s user manual for more information.

Using the switches

There are two switches on the right side of the FR-310:



One switch adjusts the microphone’s gain settings.



One switch turns the microphone On/Off or activates the bass roll-off

(high-pass filter).

Switch #1 has three positions, which are labeled “Low,” “Med” and
“High.” These positions reflect the microphone’s gain settings. We
recommend that you initially set this switch to “Med” and try the other
settings if you experience low output or overloading.

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