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What is the difference between UHF and VHF frequencies?

Frequency Bands for Wireless Microphone Systems Every wireless microphone system transmits and receives on a specific radio frequency, called the operating frequency. Allocation and regulation of radio frequencies is supervis...


Understanding Earphone / Headphone Specifications

Understanding Earphone/Headphone Specifications Though one of the most common items in the audio chain, earphones or headphones may not always work properly. Common problems are distorted audio, low level with the volume at m...


Earphones in the Washing Machine

The odds are in your favor.  Shure earphones often survive a trip through a washing machine.  Here are the steps to take after discovering the newly washed earphones: Dry the earphones thoroughly with a soft tow...


Mic Level and Line Level -- What do they mean?

Some mixers have switches on the rear panel for setting each input jack or output jack for mic level or line level. These terms refer to the signal level or intensity. Microphone level is in the region of  -60 dBV&...


Difference between a dynamic and condenser microphone

Dynamic and condenser describe the operating principal used in a microphone. Operating principle - The type of transducer inside the microphone, that is, how the microphone picks up sound and converts it into an electrical s...


Troubleshoot wireless mic dropouts

Dropouts in wireless mics can be caused by many things, including antenna placement, bad antenna cable, antenna distribution problems, frequency selection, interference, etc. Troubleshooting dropouts will be a process of tri...


Five Mistakes to Avoid When Using Wireless

While wireless systems have freed performers from the bonds of cords and cables, they've unleashed a number of headaches for the sound crew. Getting a wireless system to behave predictably is a challenge faced by touring prof...


What is "Squelch" on a wireless receiver?

Blog Posting about Squelch An circuit that is important to proper receiver behavior is called "squelch" or muting. The function of this circuit is to mute or silence the audio output of the receiver in the absence of the des...


Locking and Unlocking transmitters and receivers

BLX SERIES Transmitter (Power & Frequency) Lock or Unlock: With transmitter ON, hold down the GROUP button, then press the CHANNEL button for two seconds. Receiver (Power & Frequency) Lock or Unlock: Power ON the re...


Can I use two (or more) wireless microphones with one receiver?

No, this will not work. A wireless receiver can only demodulate the signal from one active mic-transmitter at a time. But you may use one transmitter or the other, as long as only one transmitter is powered up at any time. ...


Hum in a Hi-Fi System or Turntable

SOURCES OF HUM It is difficult to answer the question "What makes my hi-fi system hum?" because there are many possible causes. However, the cures are simple and will eliminate hum in many cases when the outline ...


Color code for phono cartridge wiring

The color code below applies to the majority of turntables and tone arms: Left = white wire Left Ground = blue wire Right = red wire Right Ground = green wire Be certain to check your turntable user guide to confirm ...


Diminished sound in one ear of my earphones

Most likely it is due to earwax inside the nozzle or sleeve. The nozzle is the passage way for the audio signal.  The nozzle opening is very tiny.  The smallest amount of wax or moisture can cause a drastic drop in...


Reserved TV channels and registering wireless mics

Background After the 700 MHz auction in 2009, many unoccupied TV channels are shared between wireless microphones and white space devices (WSD's). A WSD can only transmit on TV channels that are unassigned to a TV station ...


1/4" TRS Stereo vs. 1/4" TRS Balanced

1.If you have a stereo TRS 1/4" cable.. is that the same as the balanced TRS 1/4" cable * Yes. but left is on one and right is on another? * Typically tip is left and ring is right, HOWEVER, this is an unbalanc...


Batteries and wireless microphones

Batteries and Wireless Microphones Benjamin Franklin first coined the term "battery" during his famous electrical experiments. Then around 1800, Alessandro Volta, a professor of natural philosophy at the University ...


Transformers - When to use and how does it work?

Audio Transformers Audio transformers can: 1) Step up (increase) or step down (decrease) a signal voltage; 2) Increase or decrease the impedance of a circuit; 3) Convert a circuit from unbalanced to balanced and vice versa; 4...


How do I wire an XLR to 1/4" adapter cable?

There are many different configurations that can be made between an XLR to 1/4" adapter. The XLR connector is pretty straight forward. It has 3 wire terminals and is standard. The 1/4" connector, on the other hand, can ...


SM57 vs SM58

The SM57 and SM58 microphones are based on the same cartridge design. The main difference is in the grille design. The SM58 was designed for vocal application and it uses a ball grille that acts as an effective pop filter. The SM...


How should I clean my microphone?

Cleaning Microphones You've finally invested in a high quality vocal microphone and your voice has never sounded better. Unfortunately, the keyboard player in your band decides he wants to use your mic during his feature...


Vintage Shure Catalogs (1933-1985)

Year Type Size Model numbers 1933 Catalog 4.0MB 5N, 11N, 22N, 33N, 42, 99 1935 Catalog 5.7MB 41H, 43D, 43E, 43F, 7...


Noise problems caused by audio cable

Audio system performance will be degraded due to any undesirable and interfering voltage (developed within or external to the audio system) which evidences itself as "electrical noise". By using the proper cable type wi...


Seven Common Reasons for Wireless Mic Problems

Reason #1: Dead or weak batteries How to check: Substitute newly purchased, brand name alkaline batteries. Examine the wireless mic battery terminals to make certain they are making a secure contact to the terminals on the batt...


What does the term "dB" mean? How do you calculate it?

THE DECIBEL What is a dB? The decibel (dB) is an expression often used in electrical and acoustic measurements. The decibel is a number that represents a ratio of two values of a quantity such as voltage. It is actually a...


What is Phantom Power?

Phantom power is used with condenser microphones. It is called phantom power because there is no obvious external power supply for the condenser mic; the power supply is invisible and therefore a "phantom." The mixer sends volta...


Why should I use an omnidirectional microphone?

Six Reasons to Use an Omnidirectional Mic instead of a Unidirectional Pity the poor, misunderstood omnidirectional microphone. Though it has many redeeming characteristics, it now plays second violin to the unidirectional mi...


Human Hearing Range in Decibels

The human hearing mechanism is highly sensitive and covers a wide range of "loudness."  From the average "threshold of hearing" to the "threshold of pain."  This range is often described as...


How far away will my microphone pick up?

The Myth of Microphone Reach Shure is often asked "How far away will my microphone pick up?'" or "Which microphone has the best reach?" Both questions are based on a misunderstanding of how microphones...


Removing earphone sleeves

Shure earphones are packaged with sleeves on the stems. During periods of storage and shipping, the sleeves can adhere to the stems. Given the choice between a sleeve that is difficult to remove and a sleeve that easily comes off...


Stylus Wear and Record Wear

In 1954, a booklet was published on this subject.  It has been out of print for decades.  Shure Applications Engineering found a copy and is making it available in this FAQ. The original text has been edited and condens...


Differences between Beta 87A, Beta 87C, and SM87A

For the differences between SM and Beta microphones, click on the following links: Beta models vs. SM models SM87A vs Beta 87A Benefits of the Beta 87C over the 87A?


How to insert and wear Shure SE earphones

These photos demonstrate the recommended way to wear the SE earphones. First, bend the cable near the earphone into a shape that will work as a "hook" to go around the top of the ear. It is best to make sure that b...


SE Earphone Cable Removal

The cable/earphone connector is difficult to remove, and designed like this on purpose. Grasp the earphone using a piece of cloth, like the T-shirt, between your fingers and the earphones.   Do the same with y...


Difference between a SM57 and a SM57-LC ?

The SM57 "microphone" used to come in two different "packages". One was the SM57-CN which included a standard, 7 meter, XLR to XLR mic cable. The other one was the SM57-LC which came without a cable - just the mic and stand adapt...


Technical differences between ULXD, QLXD, PGXD, and GLXD

Frequency Band PGX-D: 902-928 MHz* GLX-D: 2.4 GHz QLX-D: 176-216, 470-928 MHz* ULX-D: 176-216, 470-928 MHz* *Country Dependent Maximum Simultaneous Systems Under Optimal Conditions PGX-D: 5 GLX-D: 4 GLX-D Adv...


Can I parallel microphones into one input of my mixer?

Wiring Microphones in Parallel Connecting microphones in parallel allows more than one microphone to be connected to the same microphone input of a mixer. This reduces the cost and complexity of the sound system, since fe...


Pin-out for Shure bodypack transmitters and preamps - TA4M / TA4F

Product Model Wiring Wireless bodypack transmitters - all models with TA4M connectors MX1BP Battery/Phantom Preamplifier RK183PK Microflex Prea...


Counterfeit (fake) Shure products

It is true. There are Shure counterfeit products being sold on the Internet and in stores. Any company that has a brand known around the world is subject to counterfeit goods; examples include Sony, Rolex, Hermes, Coach, Levi'...


Difference between a Line input and a Mic input?

Here are brief answers: 1) The voltage level of the signal. A line level signal is at least 50 dB greater than a mic level signal. 2) Wired and wireless mics are typically connected to mic level inputs. Most other audio...


Reglas Básicas para Configurar un Sistema de Monitoreo Personal

Click here for English   Gracias a recientes avances en el campo del Monitoreo Personal, esta tecnología ha logrado estar al alcance de más artistas que nunca. A pesar de los numerosos beneficios de uti...


Which microphone should I use on ... ? (Selection Guides)

The following are current Shure microphones as of March 2018. Vocals Live Vocals KSM8 KSM9 Beta 58A SM58 Beta 87A ...


Coordinate existing wireless using Wireless Workbench 6 tutorial

The Wireless Workbench 6 (WWB) software can be used to coordinate frequencies for your systems. Wireless Workbench 6 can be downloaded for free and works on both Windows and Mac. This tutorial will explain how to perform fre...


Help me find the frequency band on my wireless mic

The band information is printed on every transmitter and receiver.  Depending on the model number, the band information could be on the front, the back, the bottom, or inside the battery compartment. The band will be similar...


Phono cartridge alignment gauge - how to use and how to make your own

The gauge aligns the cartridge/stylus so that the stylus tip contacts the walls of the record groove at the proper angle.  Attached below is a PDF file of the gauge.  It can be printed and glued to thin cardboard if you...


Analog wireless microphones vs. digital wireless

Shure's Dave Mendez provided the following observations: It is difficult to say whether analog wireless or digital wireless systems are better or worse than one another as a rule.  In general, digital wire...


SM58LC and SM58 CN - differences

LC = less cable...no cable is provided CN = connector...a cable is provided with XLR connectors at both ends


SM7B Output Level and Preamp Gain Specifications

The SM7 (SM7A, SM7B) is a dynamic microphone. A typical dynamic mic has a lower output level than a typical condenser mic. For example, the dynamic SM7 has an output level that is 28 dB (!) less than the condenser KSM44 [cardioid...


Wireless Troubleshooting Hints

Troubleshooting Wireless Microphone Systems   Even when wireless microphone systems appear to be properly selected and set up, problems may arise in actual use. While it is not practical here to offer comprehensive s...


How do I fix my feedback problem?

Feedback: Fact and Fiction One of the most commonly asked questions in professional audio is “What microphone can I use that doesn’t cause feedback?” The answer to the question is, of course, that no such mi...


Does the SM7B need phantom power?

The SM7B does not require phantom power and is not affected if phantom power is present on its mixer input.


Scan function - Recommended Method

Note 1: If there are existing, older wireless systems that will still be used, make certain they are powered up, operating, and placed on stage before beginning the scanning function. Refer to the User Guide of each Shure system...


ULX transmitter or receiver - Group displays E1 or F1

Turn on the transmitter. Hold SET button for 10 seconds. Release SET button when display changes. Use this same concept if the receiver shows E1 or F1 This function is the Master List and allows access to all 1400 freq...


Will phantom power damage my SM58?

No. Any dynamic microphone with a low impedance balanced output, like the SM58, is not affected by phantom power. Phantom Power will not damage a professional dynamic microphone.


Benefits of the Beta 87C over the 87A?

The primary difference is the pick-up pattern. The BETA 87A is a supercardioid; the BETA 87C is a cardioid. The 87C was introduced for performers using in-ear monitors. In brief, a cardioid mic is often preferred by in-ear monito...


Custom molds for earphones: how to, what, and where?

Custom sleeves offer the ultimate in personal fit, and in some cases offer even better sound isolation than the universal sleeves included with Shure in ear monitors. Note that custom molds are unique to your ear canal AND unique...


When to choose SLX over ULX wireless systems?

How many systems will be operating simultaneously? When deciding between SLX and ULX systems, one has to first determine how many total wireless systems will be operated simultaneously. This is the most important deciding factor....


Range of a Wireless Microphone System

A logical question concerning wireless performance is the transmission range of various systems. Unfortunately, the answer is much more complicated than a simple distance measurement. Ultimately, the receiver must be able to pick...


How do I connect a professional microphone to a camcorder?

Connecting Microphones to CamcordersThere are many interfaces by the likes of Beachtek, Marantz, Kopul, Saramonic, etc. on the market to help connect a professional mic to a camcorder. These interfaces are the easiest way to conn...


GLX-D Pro / Con of the 2.4 GHz Frequency Band and User Hints

There is no perfect frequency band for a wireless mic system.   Every frequency band has pros and cons. GLX-D operates within the 2.4GHz ISM band which is utilized by Wi-Fi, Bluetooth, and other wireless devices. 2...


GLX-D firmware update

If the blue rf light is blinking and there is no audio you will need to update your components to the latest firmware. Download the Shure Update Utility from the Shure web site. Install the Shure Update Utility an...


Handling Noise of Microphones

Handling "Handling Noise" Handling noise, a phenomenon not understood well by many, refers to any undesired noise that comes from a cable or microphone when being moved or handled. This bulletin identifies the sou...


Difference between ULXP4 and ULXS4 Receivers

The following table lists the differences between the two ULX receivers. ULXP4 Professional Receiver ULXS4 Standard Receiver Rack hardware included Rack hardware optional...


Remote Antennas for UHF-R, BLX4R, SLX, ULX, QLX-D or ULX-D Receivers

Remote Antennas for UHF Wireless Microphones Click here for an online remote antenna tool. Antennas are described in terms of the signal wavelength they are designed to pick up. The antenna supplied with Shure...


Differences between SM and PG or PGA microphones

The PG or PGA series are an entry level series, while the SM series is a mid level series. The performance of the SM series is better, when comparing frequency response, polar response, handling noise, transient response, et...


Sending Earphones for repair

Repair of Earphones is handled at the following locations: ASIA-PACIFIC Shure Asia Ltd., Hong Kong Customer Service +852 2893 0411 Email Form ...


PGX transmitter will not sync with the PGX4 receiver

Here are possible causes of the problem, from most common to least common:   1) The battery compartment of the PGX transmitter is not open, and therefore the sync signal from the PGX4 is not being received.  ...


Which phono cartridge will fit my turntable?

Matching a cartridge to a turntable requires:  1) The tone arm mounting method for the cartridge; 2) The tone arm tracking force range. 95% of the time the cartridge mount will be one of two types: 1) Standard Moun...


Wireless microphone is not loud enough

The problem is not the mic element. The problem is a level mis-match between the wireless receiver output and the device to which it is connected. This scenario is common and the explanation is simple. The audio output level...


How do I build a phantom power supply?

The circuit below is a basic 12 volt phantom power supply that can be constructed in several hours by an electronics hobbyist. It consists of parts commonly available at Radio Shack or Digikey.   This circuit will pr...


Dante Networks and IGMP Snooping

Dante enabled devices can exhibit communications issues with switches that use IGMP (Internet Group Protocol Management) Snooping if the switch is not configured correctly. Many switches have this feature disabled by default. Tu...


MXA910 best practices - setup hints

Also see: MXA910/MXA310 Training and Certification The following settings and recommendations are based on extensive experience helping customers tune and commission MXA910 in AV Conference and Voice Lift Systems. Though some of t...


RG58 A/U, B/U & C/U ?

RG stands for "Radio Guide" and is a military term. The 58 class has an outer diameter of 0.195 inches, 50 to 53.5 ohms impedance, and can handle up to 500 watts of HF (High Frequency) power. RG58/U has a soli...


Connecting a microphone to a home hi-fi receiver

Microphones provide a much lower audio level than other audio components. Your home audio receiver expects to see AUX level from any device that is plugged into it. Microphones only supply MIC level. There is about a 50-60 dB dif...


Earphone model number identification by photo

Some Shure earphones have the model number laser etched into the 1/8" connector. The following photos also identify the earphones. Many earphones were available in multiple colors, so look at the style and shape of the photo...


Using Shure earphones for exercise/sweat

Shure earphones have been used by professional performers on stage for several years.  They are typically worn for hours at a time, and as one can imagine, the earphones are exposed to a lot of sweat.  All Shure earphon...


Will a phantom power mic work with a 1/4" input?

If a mic requires phantom power, but the mixer doesn't have an XLR input...will it still work correctly? * Phantom power is typically supplied only by a mixer with an XLR input. If the mic requires phantom to operate and...


Difference between bias (plug-in power) and phantom power?

Please see the following links to our online FAQ: Condenser mic for minidisc recorder w/ Plug-in-Power Difference between balanced and unbalanced As for the SM58, it depends on how the adapter cable that you have is w...


Theater Audio: The Science Behind the Illusion

Theater Sound: The Science Behind the Illusion Have you ever noticed how great Broadway shows sound? Does the rock band in "Rent" get your blood pumping? Do the lyrics to "Memories" get you choked up every...


Understanding Dante Flows

In order to answer this question, it's important to understand the concept of Dante flows. Whenever an audio channel is routed from one Dante device to another, a "flow" is created. Each Dante flow can contain up to 4 audio ...


How to use earphone cleaning tool

For any wax/debris build-up, hold the earphone with the nozzle pointed downward.  While cleaning, it is desired to have the wax fall out of the nozzle, not accumulate in the center of the nozzle. When insertin...


How to keep headphone earpads from smelling foul

1) Before the headphones are stored/put away, wipe off the earpads with a clean towel or a paper towel. 2) On a regular basis, wipe off the earpads using a damp rag and a small amount of Dawn dish soap.  Dawn is effecti...


Shure headphone/earphone MMCX connectors

While both SRH series headphones (1440, 1840) and SE earphones do use a MMCX connector, we do not recommend interchanging the cables. The plastic over molds were designed for the specific products and in some cases , the over mol...


Why does Proximity Effect Occur?

Proximity Effect In its simplest form, proximity effect is the increase of bass frequencies as a directional microphone comes closer to the sound source. But why? Why do the bass frequencies incr...


GLXD reception problems caused by wireless Wi-Fi router

 This customer had a wireless router.   He wrote back with this information: "Setting my wireless router to a more specific range of frequencies rather than leaving it on "Auto" cleared up the G...


Earphones do not fit, are uncomfortable, or will not stay secure in my ear canal

First, please read: How to wear Shure earphones The shape, size, and physical anatomy of the ear canal can vary dramatically from person to person, like the size and shape of feet.  Just as one size and shape of shoe wi...


How does Radio Frequency Interference (RFI) occur?

This explanation provides the general concept. (If you are an RF expert, please forgive the generalizations employed.) Radio Frequency Interference (RFI) in a sound system can be defined as an unwanted audible signal that in...


What is the warranty on Shure earphones?

A valid purchase receipt from an authorized dealer is required for warranty service on all Shure earphones. In the U.S., warranty service will only be considered for products purchased within the last two years and covers manufac...


Beta models vs. SM models

Beta 58A versus SM58: Polar pattern: Beta 58A = supercardioid; SM58 = cardioid Output level: Beta 58A is 4dB hotter than SM58 Handling noise: Beta 58A is quieter than SM58 Grill: Beta 58A has a hardened grill that is very...


High Fidelity Phonograph Cartridge - Technical Seminar

This is a copy of a 1978 technical seminar on phonograph cartridges. Table of Contents Introduction - "Integrated System Design: A New Concept in Phonograph Cartridges" by J. H. Kogen The Stylus Tip and Record...


M44-7 Phono Cartridge Set Up

Finding your optimum "set-up" solves most skipping problems. Every DJ has a different touch, and some experimentation is required to obtain maximum results. Unfortunately, it is very difficult to diagnose specific probl...


RMCE-BT1 codec

The RMCE-BT1 uses the SBC codec, which is neither high resolution nor low-latency. It is supported by all Bluetooth devices, however, and has less than 250 milliseconds of latency.


Motiv MV88 with video recording

Yes. Setup the MV88 using the Shure Motiv App. Then, go to the video app (such as the Apple camera app) that you wish to use to record the video. The iPhone should use the MV88 for the video recording. If not, check the iPhone f...


Can a dynamic microphone handle really loud sounds? (Maximum SPL)

Realistic Maximum Sound Pressure Levels for Dynamic Microphones Microphone users often ask "What is the maximum sound pressure level that a dynamic microphone can handle without distortion?" Using the Shure SM58 as ...


Which television stations should I avoid when using a wireless microphone?

Many professional wireless microphones use the same frequencies as broadcast television stations. Direct conflict with a TV signal causes short range or dropouts. Though it is not possible for an wireless mic ...


ULXD v2 Firmware Update and Issues

IMPORTANT ULX-D 2.X firmware versions are incompatible with 1.X firmware versions. To ensure all receivers and transmitters in a configuration function with each other, update all devices to the same firmware version. New...


ULX Quick Start Frequency Setup

ULX Quickstart Frequency Setup Same Frequency Band. All wireless channels share same frequency code (G3, J1, M1)     ...


What is intermodulation?

This is a excerpt from Selection and Operation of Wireless Microphones. Frequency Selection Selecting the operating frequency of a wireless audio system is a two-step process: first, choose an appropriate radio frequency b...


BLX H8 and BLX H9 Compatibility

Yes. The first 5 frequency groups of BLX H9 and BLX H8 are identical.  An H8 device and an H9 device are compatible if they are tuned to a frequency within the 5 groups. See the PDF file below. The H8 band (518-542...


Beta 58 vs. Beta 58A - Beta 57 vs Beta 57A

The Beta 58A has a completely new cartridge in it. While the new cartridge is meant to mimic the old cartridge as far as polar pattern, output level, and frequency response goes, it is a different cartridge and will sound slightl...


Difference between Beta 58 and Beta 58A

Originally the Beta 58 was available as the the Beta 58C (chrome grill) or the Beta 58M (matte grill). The Beta 58C was eventually discontinued and the Beta 58M became just the Beta 58. The Beta 58 was then discontinued and repla...


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