R77 - Microphone MXL - Free user manual and instructions

Product Type	Ribbon Velocity Microphone
Brand	MXL
Model	R77
Ribbon Element	1.8-micron aluminum ribbon
Frequency Range	20 Hz – 18 kHz
Polar Pattern	Figure-8 (bidirectional)
Sensitivity	-55 dB (0 dB = 1V/Pa)
Impedance	270 ohms
Rated Load Impedance	> 1500 ohms
Max SPL (0.1% THD)	> 135 dB @ 1 kHz
Dimensions	65 mm x 180 mm (2.56 in x 7.09 in)
Weight	860 g (1.9 lbs)
Finish	Gold and Chrome
Power Requirement	None (phantom power NOT recommended)
Connector	XLR (balanced)
Included Cable	Mogami XLR cable
Front Identification	MXL logo (in-phase signal)
Recommended Accessories	Pop filter, high-gain low-noise preamp (≥1500 ohms)
Care Instructions	Avoid shock, air bursts, dust; store in case
Warranty	1 year (ribbon element excluded)

Frequently Asked Questions - R77 MXL

Does the MXL R77 require phantom power?

No, the MXL R77 is a ribbon microphone and does not require phantom power. Using phantom power can permanently damage the ribbon element.

What is the polar pattern of the R77?

The R77 has a figure-8 (bidirectional) polar pattern, picking up sound equally from the front and back while rejecting sound from the sides.

Can I use the R77 for vocals?

Yes, but it is recommended to use a pop filter to protect the fragile ribbon from plosive air bursts.

What kind of preamp should I use with the R77?

Due to its low output, use a high-gain, low-noise preamp with an input impedance of 1500 ohms or greater.

Is the ribbon element covered under warranty?

No, the ribbon element is not covered under the standard warranty. Inspect the mic immediately upon receipt.

How do I identify the front of the microphone?

The front is indicated by the MXL logo. The front signal is in-phase; the rear signal is inverted phase.

What is the frequency response of the R77?

The frequency range is 20 Hz to 18 kHz. The response is relatively flat with a gentle roll-off above 10 kHz.

Can I use the R77 for recording loud sources?

Yes, it handles SPLs above 135 dB at 1 kHz for 0.1% THD. However, avoid sudden loud bursts that may damage the ribbon.

What cable is included with the R77?

The R77 includes a Mogami XLR cable, known for high quality and low noise.

How should I store the R77 when not in use?

Always store the microphone in its case to protect it from dust, metal shavings, and physical damage.

USER MANUAL R77 MXL

Thank you for purchasing the MXL R77 Ribbon microphone. MXL microphones are the result of world-class engineering and manufacturing capabilities. Our microphones are designed to provide you with outstanding performance and exceptional value. 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

The MXL R77 Ribbon microphone uses an aluminum ribbon transducer which by nature is a bidirectional (figure-8) pickup pattern. A figure-8 pattern will pick up sounds from the front and back sides of the microphone with equal sensitivity while maintaining a large amount of rejection 90^ off access. The front of the microphone is indicated by the MXL logo where the audio signal is “in-phase” while the back side has an inverted phase. Ribbon mics typically have a lower output than condenser microphones and may require a preamplifier with a lot of gain. It is highly recommended to use a preamp with low noise, high gain, and an input impedance of 1500 ohms or greater. We strongly advise experimentation with placement and isolation requirements with the gain initially set low to avoid possible equipment (and hearing) damage.

Power Requirements

IMPORTANT! This microphone does NOT require a power supply. Use of phantom power with this microphone is NOT recommended as it can severally damage the ribbon element and cause the microphone to be unusable.

Care/Handling

The ribbon element is very fragile. Although each unit has been thoroughly checked by MXL, it is important to check the microphone as soon as you receive it to insure that it was not damaged in shipping. To help prevent transducer failure, avoid large vibrations and severe shock such as dropping the microphone. Never expose the microphone to large bursts of air as it can stretch or tear the ribbon element. It is highly recommended to use a pop-filter when using this microphone. Dust and foreign material (especially metal shavings) can degrade the performance of a microphone so always store the unit in its case. Never intentionally or accidentally apply power to the microphone as it can permanently damage the ribbon element.

Please note: Damage to the ribbon is not covered by the warranty, and there will be a charge for a replacement.

Microphone Cables

This microphone connects to a preamp via XLR cable. Cable can have a profound effect on the sound of any microphone. Even the finest microphones will sound poor if the cable allows noise to enter or causes distortion and loss of information. We recommend using the included Mogami XLR cable.

R77 Specifications:

Type: Ribbon Velocity Microphone

Ribbon Element: 1.8-micron aluminum ribbon

Frequency Range: 20Hz -18kHz

Polar Pattern: Figure 8

Sensitivity: -55 dB (0 dB=1V/Pa)

Impedance: 270 ohms

Rated Load Impedance: >1500 ohms

Max SPL for 0.1% THD: >135 dB @1 kHz

Size: 65mm x 180mm/2.56 in x 7.09 in

Weight: 860g/1.9lbs

Metal Finish: Gold and Chrome

For more information about MXL microphones, visit www.mxlmics.com

Frequency curve

Radar chart with concentric circles and radial axes marked at 0, 90, and 270 (no text or symbols beyond axis labels)

180
Polar pattern

Warranty

Marshall microphones are guaranteed against defects in material and workmanship for one year from date of purchase. The ribbon element is not covered by the normal warranty so please check the microphone immediately upon receipt. Should you encounter any problem with this unit, promptly contact the company you purchased it from within five days of purchase for assistance. Contact Marshall directly for a quote to repair a damaged ribbon. 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.