Shure GLX-D Wireless System – GLXD4 Receiver

System Overview

The Shure GLX-D Wireless System offers advanced automatic frequency management technology combined with intelligent battery rechargeability for lithium-ion batteries, world-renowned microphones, and unique design and construction. Available in a variety of configurations with body-pack and handheld transmitters, including Vocal, Headset, and Presenter systems, as well as traditional guitar mounting options. The revolutionary GLX-D wireless systems are at the forefront of ease of use and exceptional digital audio clarity.

• Extremely clear digital audio
• Operates in the 2.4 GHz spectrum, available worldwide
• Rechargeable batteries are cost-effective and provide up to 16 hours of operation
• Adjustable transmitter gain optimizes audio signal
• Automatic interference exclusion without audio interruption
• Rear RF channel for remote control of transmitter functions
• The 2.4 GHz frequency band, which is not licensed globally, allows for the operation of up to 4 compatible systems in a typical configuration and up to 8 in ideal conditions
• Automatic transmitter power-off when not in use to conserve battery life

Included Components

• Shure Rechargeable Battery
• Micro USB Charger
• Power Supply
• Carrying Case
• Quick Start Guide

Optional Accessories

• Car Charger
• Separate Charger for Single Battery

Quick Start Guide

To reduce setup time, the transmitter and receiver automatically link upon first power-on to create an audio channel, eliminating the need for re-linking.

Note: When setting up multiple receiver systems, power on and link each transmitter/receiver pair one at a time to avoid cross-linking.

1. Step 1: Connect the power supply to the receiver and plug the power supply into a mains power outlet. Connect the audio output to an amplifier or mixer.
2. Step 2: Install the charged batteries into the transmitter.
3. Step 3: Power on the transmitter and receiver. During the linking process, the blue RF LED will flash and then remain solid once the link is successfully established.
4. Step 4: Check the audio and adjust gain as needed.

Note: The transmitter and receiver remain linked for subsequent use. Upon power-on, the RF LED will illuminate, skipping the linking step.

Receiver Controls and Connectors

Receiver Front Panel:

• 1. Antenna: Two antennas for the receiver. Antennas receive the signal from the transmitter.
• 2. RF Status LED: ON = transmitter linked and powered on; Flashing = transmitter searching; OFF = transmitter powered off or not linked.
• 3. Group Button: Press and hold for two seconds to manually change the group.
• 4. Link Button: Press to manually link the receiver to a transmitter or to activate the remote ID function.
• 5. Channel Button: Press momentarily to initiate a channel scan. Press and hold for 2 seconds to manually change channels.
• LCD Display: Shows the status of the receiver and transmitter.
• 7. Gain Buttons: Press to increase or decrease transmitter gain in 1 dB increments.

Receiver Rear Panel:

• 10. Power Switch: Turns the unit on and off.
• 11. Power Jack: Connects to the included 15 V DC external power supply.
• 12. Mic Output: XLR connector for microphone output, providing mic-level audio output.
• 13. USB Port: For firmware updates.
• 14. Instrument Output: 1/4" (6.35 mm) TRS audio output. Connects to mixers, recorders, and amplifiers.

Receiver Display Screen:

• 1. Group: Displays the selected group.
• 2. Channel: Displays the selected channel.
• 3. Transmitter Battery Life: Displays remaining battery life in hours and minutes. Alternately displays: CALC = calculating battery life; Lo = battery life less than 15 minutes; Err = replace battery.
• 4. Audio Indicator: Shows audio signal level and peaks.
• 5. Gain: Displays transmitter gain settings (dB).
• 6. OL (Overload) Indicator: Indicates audio overload; reduce gain.
• 7. Transmitter Locked: Displays when the controls of the linked transmitter are locked.
• 8. Scanning: Indicates a scan is in progress.
• Auto: Indicates that the selected group has backup channels available.

Transmitters

GLXD1 Body-Pack Transmitter:

• 1. Antenna: Transmits the wireless signal.
• 2. Status LED: LED color and status indicate transmitter status.
• 3. Power Switch: Turns the transmitter on and off.
• 4. TA4M Input Connector: Connects to a microphone with a TA4F miniconnector or to an instrument cable.
• 5. Micro USB Charging Port: Connects to the USB charger.
• 6. Link Button: Press the button within 5 seconds after power-on and hold to manually link the receiver. Momentarily press to activate the remote ID function.
• 7. Battery Compartment: Holds one Shure rechargeable battery.
• Microphone Capsule: GLXD2 transmitter models are available with the following cartridge types: SM58, Beta 58, SM86, Beta 87A.

Transmitter Status LED:

Under normal operation, the LED is illuminated green. Changes in LED color or flashing indicate a change in transmitter status:

Microphone Placement with Headworn Mount:

• Position the headworn microphone 13 mm from the corner of the mouth.
• Position lavalier and headworn microphones to avoid contact with clothing, jewelry, or other objects.

Body-Pack Transmitter Placement:

Attach the transmitter to a belt or thread a guitar strap through the transmitter clip as illustrated. For best results, press the belt firmly against the clip base.

Correct Microphone Placement:

• Hold the microphone 30 cm from the sound source.
• For a warmer sound with more bass presence, move the microphone closer to the sound source.
• Do not cover the grille with your hand.

Battery and Charging

GLX-D transmitters are powered by Shure SB902 rechargeable Li-ion batteries. The advanced battery chemistry ensures extended life without a "memory effect," eliminating the need to fully discharge batteries before recharging.

When not in use, it is recommended to store batteries at a storage temperature of 10-25 °C.

Note: While connected to the charging cable, the transmitter does not emit RF or audio signals.

Battery Charging Options:

Receiver Charging Module:

The GLXD4 receiver features a built-in charging module for transmitter batteries.

1. Insert the battery into the charging module.
2. Check the battery charge LED on the front panel until charging is complete.

Charging via AC Power Outlet:

1. Connect the charging cable to the charging port on the transmitter.
2. Connect the charging cable to an AC power outlet.

Charging via USB Port:

1. Connect the USB charging cable to the charging port on the transmitter.
2. Connect the cable to a standard USB port.

LED Status During Charging:

The following LED states indicate the battery status when the transmitter is connected to a charger:

• Green = Charging complete
• Green Flashing = Battery charge > 90%
• Red = Charging in progress
• Amber Flashing = Battery error; replace the battery.

Transmitter Battery Installation:

Body-Pack Transmitter:

1. Slide the locking lever to the open position and open the battery compartment door.
2. Insert the battery into the transmitter.
3. Close the battery compartment door and slide the latch to lock it.

Handheld Transmitter:

1. Unscrew and remove the battery compartment cover.
2. Insert the battery into the transmitter.
3. Replace and screw on the battery compartment cover.

Charging Times and Transmitter Battery Life:

Use the following table to estimate battery life based on charging time. Times are in hours and minutes.

*Prolonged storage and excessively high temperatures may reduce expected battery life.

Note: To conserve battery life, GLX-D transmitters automatically power off after approximately 1 hour if they do not detect a signal from a linked receiver.

Important Tips for Care and Storage of Shure Rechargeable Batteries:

Proper care and storage of Shure batteries ensure reliable performance and long service life.

• Always store batteries and transmitters at room temperature.
• For long-term storage, it is ideal to charge batteries to approximately 40% of their capacity.
• During storage, check batteries every 6 months and recharge them to 40% capacity as needed.

Multiple Receiver Systems

To facilitate setup, frequencies are divided into groups to best meet the channel requirements of the system in use. Select the group based on the total number of receivers in the system. All receivers in the system must be set to the same group.

*Subject to environmental conditions, typically 4 systems.

For more information, refer to the "Tips for Improving Wireless System Performance" section.

Receiver and Transmitter Configuration:

Note: Before starting, turn off all receivers and transmitters. Power on and configure each receiver/transmitter pair one at a time to avoid cross-linking.

1. Power on the first receiver.
2. Press and hold the group button to select a group (if necessary), or if the group is already set, press the channel button to scan for the best available channel.
3. Power on the first transmitter. During the linking process, the blue RF LED will illuminate.

Repeat steps 1 to 3 for each additional receiver and transmitter, ensuring each receiver is set to the same group.

Note: The presence of dashes on the receiver display during a channel scan indicates that no frequencies are available within the selected group. Choose a group that supports more receivers and repeat the configuration steps.

Manual Transmitter-to-Receiver Linking:

Use the manual linking option to change the transmitter linked to a receiver. Manual linking is commonly used to change the linked transmitter from a body-pack model to a handheld model.

1. Power on the transmitter: within 5 seconds, press and hold the LINK button until the transmitter's LED flashes green.
2. Press and hold the link button on the receiver; the blue RF LED will flash and remain solid when the link is established.
3. Test the audio to verify the link and adjust gain if necessary.

System Combos:

A combo system is created by linking two transmitters to a single receiver. Only one transmitter can be active at a time to prevent cross-interference. Gain settings for each transmitter can be set and stored independently when the transmitter is active.

Important: Never power on or use both linked transmitters simultaneously. Power off both transmitters before starting.

1. Press the group button to select a group. The receiver will automatically scan the selected group for the best available channel.
2. Power on transmitter 1 and link it to the receiver. Adjust the gain, then power off the transmitter.
3. Power on transmitter 2 and link it to the receiver. Adjust the gain, then power off the transmitter.

2.4 GHz Spectrum Overview

The GLX-D system is designed for use in the 2.4 GHz ISM band, which is used by Wi-Fi, Bluetooth, and other wireless devices. The 2.4 GHz band is a global band that can be used license-free anywhere in the world.

Preventing Interference Related to the 2.4 GHz Band:

• The disadvantage of the 2.4 GHz band is the unpredictability of Wi-Fi traffic. To address this, the GLX-D system employs the following measures:
• Prioritizes and transmits on the 3 best frequencies for each channel (selected from a pool of 6 frequencies within the 2.4 GHz band).
• Repeats critical information, such as frequency exclusion, without audio interruption.
• Performs continuous scanning during use to classify all frequencies (both active and backup).
• Avoids interference and switches to backup frequencies seamlessly and without audio interruption.

Coexistence with Wi-Fi Systems:

If you plan to use Wi-Fi during a performance, turn on Wi-Fi devices before powering on the GLX-D and perform a channel scan. By scanning the entire 2.4 GHz environment and selecting the 3 best frequencies for transmission, the GLX-D system identifies and avoids other Wi-Fi traffic. This ensures reliable performance of the GLX-D wireless system while also excluding Wi-Fi transmissions, which is equally important.

The detection of repetitive, short-duration bursts (bursts) from Wi-Fi systems is more complex due to their intermittent nature; however, the GLX-D system's repeated transmission of critical information ensures that even extremely high-intensity bursts do not affect audio performance.

Complex Wireless Environments:

Some environments are more challenging for 2.4 GHz wireless system performance than others. Additionally, body blocking has a greater impact on the 2.4 GHz spectrum compared to UHF. The simplest solution in many cases is to reduce the distance between the transmitter and receiver, for example, by placing receivers on stage in a clear line of sight.

Examples of Complex Environments:

• Areas with few reflective surfaces, such as: Outdoors; Buildings with very high ceilings; 3 or more GLX-D receivers in use.
• High Wi-Fi presence.
• Competing 2.4 GHz systems in use.

Note: Unlike the TV wireless band, which typically uses the same transmission types across all manufacturers, the entire 2.4 GHz wireless band currently on the market uses various transmission variations. These differences make it much more complex to mix and match 2.4 GHz from different manufacturers, unlike TV band wireless solutions.

Tips and Methods for Improving Wireless System Performance:

In case of interference or signal loss, follow these suggestions:

• Scan for the best available channel (press the channel button).
• Reduce the distance between the transmitter and receiver, for example, by placing receivers on stage in a line of sight with the front of the receiver.
• Change the group for all GLX-D systems: Single-channel system: use Group 4, optimized for single-channel use. Multi-channel system: use Group 2, the most reliable wireless group.
• Position the receiver away from Wi-Fi access points, computers, or other active 2.4 GHz sources. The recommended minimum distance is 3 meters.
• Turn off non-essential Wi-Fi on computers, mobile phones, and other portable devices.
• If you plan to use Wi-Fi during a performance, turn on Wi-Fi before powering on the GLX-D and perform a channel scan.
• Keep transmitters and receivers more than 2 meters apart.
• Avoid activities that generate intense Wi-Fi traffic, such as downloading large files or streaming movies.
• Position competing 2.4 GHz receivers far from each other.
• Do not place the transmitter or receiver near metallic or dense objects.
• Position the receiver at the top of the equipment rack.
• Keep transmitters more than 2 meters apart; this is less critical if the distance between the receiver and transmitter is less than 2 meters.
• Note: Placing transmitters less than 6 inches apart from any non-GLXD transmitters or microphone capsules may result in audible noise.
• During sound check, identify problem areas and ask presenters or performers to avoid them.
• If a strong Wi-Fi source is present and you wish to specifically use frequencies within that Wi-Fi channel, use the following GLX-D group/channel combinations (best options are listed first):
• Wi-Fi 1: Group 3/Channel 8, Group 3/Channel 4
• Wi-Fi 6: Group 3/Channel 7, Group 3/Channel 5
• Wi-Fi 11: Group 3/Channel 2, Group 3/Channel 1

Frequency Tables in the 2.4 GHz Band

The following tables show receiver channels, frequencies, and latency for individual groups.

Group 1 Channels 1-4 (Latency = 4.0 ms)

Group 2 Channels 1-5 (Latency = 7.3 ms)

Group 3 Channels 1-8 (Latency = 7.3 ms)

Group 4 Channel 1 (Latency = 7.3 ms)

Firmware

Firmware is the software embedded in each component that controls its functionality. New firmware versions are periodically developed to include additional features and improvements. To take advantage of design improvements, new firmware versions can be downloaded and installed using the Shure Update Utility tool.

The software can be downloaded from the website: http://www.shure.com/update-utility.

Connecting to a Computer:

Connect the equipment to your computer using the supplied USB to micro USB cable for the GLX-D system.

Operation

Gain Adjustment:

Use the gain buttons on the receiver to increase or decrease the gain of a linked transmitter:

• Power on the linked transmitter and press the gain buttons momentarily to adjust the gain in 1 dB increments.
• For faster gain adjustments, press and hold the gain buttons.

Suggestion: Monitor the audio and observe the audio indicator level on the receiver while adjusting the gain to avoid signal overload.

Command Lock and Unlock:

Receiver and transmitter controls can be locked to prevent accidental or unauthorized changes to settings. Note: Locks are not affected by power cycles.

Receiver Command Lock:

Press and hold the group and channel buttons simultaneously until LK appears on the LCD display. Repeat to unlock.

If a locked command is pressed, LK is displayed. To confirm the unlock command, UN is briefly displayed.

Transmitter Power Switch Lock:

With the transmitter set to off, press and hold the LINK button while powering on the transmitter. Continue to hold the link button until the lock icon appears on the receiver's LCD display. Repeat the sequence to unlock.

It is also possible to lock the transmitter power switch remotely from the receiver's front panel: Press and hold the group and link buttons simultaneously for approximately 2 seconds, until the flashing lock icon appears on the receiver's LCD display. Repeat the sequence to unlock.

Identifying Transmitters and Receivers Linked via Remote ID:

Use the Remote ID functionality to identify linked transmitter and receiver pairs in multi-receiver systems. When Remote ID is activated, the receiver's LCD display flashes, showing the ID. The status LED of the corresponding transmitter flashes alternately red and green for approximately 45 seconds.

To activate Remote ID:

1. Momentarily press the link button on the transmitter or receiver.
2. The linked receiver's LCD display flashes, showing the ID, and the status LED on the linked transmitter flashes red/green.
3. To exit Remote ID mode, momentarily press the link button or wait for the function to time out.

Manual Group and Channel Selection:

Specific groups and channels can be assigned to the receiver instead of using the automatic scan function. Note: To prevent interference from unexpected Wi-Fi devices, use Group 3 only in controlled Wi-Fi environments.

Group Selection:

1. Press and hold the group button for 2 seconds until the group display flashes.
2. Press the group button to cycle through available groups.
3. The receiver automatically saves the selected group.

Channel Selection:

1. Press and hold the channel button for 2 seconds until the channel display flashes.
2. Press the channel button to cycle through available channels.
3. The receiver automatically saves the selected channel.

Note: The presence of a double dash (--) displayed on the receiver screen during a channel scan indicates that no channels are available within the selected group. Choose a group with more channels and repeat the configuration steps.

Troubleshooting

Component Reset:

Use the reset function if you need to restore the transmitter or receiver to factory default settings.

Receiver Reset:

Restores the following factory default settings on the receiver: Gain level = default; Controls = unlocked.

Press and hold the link button while powering on the receiver until the LCD display shows RE. Note: Upon completion of the reset, the receiver will automatically initiate a scan to find a transmitter. Press and hold the transmitter's link button within five seconds of powering it on to complete the link.

Transmitter Reset:

Restores the following factory default settings on the transmitter: Controls = unlocked.

Press and hold the transmitter's link button while powering it on until the power LED turns off. When the link button is released, the transmitter will automatically initiate a scan to find an available receiver. Press the link button on an available receiver to re-link.

Technical Data

GLXD1

• Dimensions: 90 x 65 x 23 mm (3.56 x 2.54 x 0.90 in.), H x W x D (without antenna)
• Power Supply: 3.7 V Li-ion rechargeable
• Housing: Die-cast metal, black powder coat
• Input Impedance: 900 KΩ
• RF Output Power: 10 mW E.I.R.P. max
• Transmitter Input: TA4M 4-pin mini-connector
• Configuration: Unbalanced
• Maximum Input Level: 1 kHz at 1% THD, +8.4 dBV (7.5 Vp-p)
• Antenna Type: Internal monopole
• TA4M Connector Pinout: 1 Ground (cable shield), 2 Bias/+5V, 3 Audio, 4 Ground via active load (on instrument adapter cable, pin 4 is floating)

GLXD2

• Dimensions: (See diagram)
• Weight: SM58: 267 g (9.4 oz) without battery; BETA 58: 221 g (7.8 oz) without battery; SM86: 275 g (9.1 oz) without battery; BETA 87A: 264 g (9.3 oz) without battery.
• Housing: Molded plastic
• Power Supply: 3.7 V Li-ion rechargeable
• RF Output Power: 10 mW E.I.R.P. max
• Maximum Input Level: SM58: 146 dB SPL; BETA 58: 147 dB SPL; SM86: 143 dB SPL; BETA 87A: 147 dB SPL

GLXD4

• Dimensions: 40 x 183 x 117 mm (1.6 x 7.2 x 4.6 in.), H x W x D
• Weight: 286 g (10.1 oz) without battery
• Housing: Molded plastic
• Power Supply: 14-18 V DC (Positive tip, 550 mA)
• Rejection of Spurious Signals: > 35 dB, typical
• Gain Adjustment Range: -20 to 40 dB in 1 dB steps
• Phantom Power Protection: Yes
• Configuration: XLR Output: Balanced; 6.35 mm (1/4") Output: Balanced
• Output Impedance: XLR Output: 100 Ω; 6.35 mm (1/4") Output: 100 Ω (50 Ω, Unbalanced)
• Maximum Audio Output Level: XLR Connector (into 600 Ω load) +1 dBV; 6.35 mm (1/4") Connector (into 3 KΩ load) +8.5 dBV
• Output Connector Signals: XLR: 1=Ground, 2=Hot, 3=Cold; 6.35 mm (1/4"): Tip=Audio, Ring=No Audio, Sleeve=Ground
• Receiver Antenna Input: Impedance: 50 Ω; Antenna Type: Fixed half-wave dipole; Maximum Input Level: -20 dBm

Approvals

This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this equipment may not cause harmful interference, and (2) this equipment must accept any interference received, including interference that may cause undesired operation.

This wireless system operates in the 2.400 MHz to 2.483.5 MHz ISM band, available worldwide. No user license is required for operation.

Complies with the essential requirements of the following European Union Directives:

• Directive 99/5/EC R&TTE (Radio Equipment & Telecommunications Terminal Equipment)
• WEEE Directive 2002/96/EC, as amended by 2008/34/EC
• RoHS Directive 2002/95/EC, as amended by 2008/35/EC

Note: For disposal of batteries and electronic equipment, follow your local recycling program.

IC Approval in Canada per RSS-210 and RSS-GEN. IC: 616A-GLXD1, 616A-GLXD2, 616A-GLXD4

FCC Approval Part 15. FCC ID: DD4GLXD1, DD4GLXD2, DD4GLXD4

Conformity Label for ICES-003 of Industry Canada: CAN ICES-3 (B)/NMB-3(B)

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

The CE Declaration of Conformity can be obtained from Shure Incorporated or any of its European representatives. For contact information, visit www.shure.com

The CE Declaration of Conformity is available at: www.shure.com/europe/compliance

Authorized European Representative:

Shure Europe GmbH
European, Middle Eastern and African Headquarters
EMEA Approval Office
Jakob-Dieffenbacher-Str. 12
75031 Eppingen, Germany
Phone: 49-7262-92 49 0
Fax: 49-7262-92 49 11 4
E-mail: info@shure.de

Notice to Users:

Based on tests performed on this equipment, it has been determined to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used according to instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment causes harmful interference to radio or television reception, which can be determined by turning the equipment off and on, users are encouraged to try to remedy the interference by one or more of the following methods:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

This wireless system operates in the 2.400 MHz to 2.483.5 MHz ISM band, available worldwide. No user license is required for operation.