Shure GLXD6+ - Guitar Pedal Receiver Manual

System Overview

GLX-D+ Dual Band Digital Wireless offers confidence without complexity. Dual-band operation in 2.4 and 5.8 GHz more than doubles the available bandwidth to avoid interference without audio interruption. The receiver is compatible with a selection of lavalier, headset, and vocal microphones. The included lithium-ion battery offers up to 12 hours of runtime, and can be charged directly on the receiver or via USB-C.

Features

• Exceptional digital audio clarity
• Compatible with multiple legendary microphone options
• Automatically moves away from interference without audio interruption
• Operates in 2.4 and 5.8 GHz spectrum*
• Rechargeable battery delivers up to 12 hours of runtime
• Rock-solid RF performance for multiple system installations
• License-free frequency range

Note: region dependent

Guitar Pedal Receiver

DC power connector	Connect DC power supply (9 to 15 V DC, 400 mA minimum). Note: Compatible with positive tip or negative tip power supplies.
INSTR IN	Use receiver as a wired guitar pedal tuner.
INSTR OUT	Connect to amplifier or mixer. Note: If using multiple effects pedals, place the receiver pedal first in the signal chain.
USB-C port	Connect to computer to download firmware updates.
Display	Shows receiver and tuner settings. See below for more information on display controls.
Antenna	Two antennas per receiver. Antennas pick up the signal from the transmitter.
Footswitch	Press to select receiver or tuner mode.

Display Screen, Indicators, and Controls

The controls and display offer specific functionality depending on which mode is selected:

Receiver Mode

Transmitter battery me ter	Illuminated segments indicate remaining battery life.
Display	Group Channel LK (controls locked) UN (controls unlocked) -- (frequency not available)
Link button	Press to manually link receiver to a transmitter or to activate the remote ID function.
Mode button	Press to enable audio gain adjustment. Use ▲ ▼ buttons to adjust gain.
Audio LED	Illumination corresponds to audio level. Rapid flashing indicates audio clipping.
Mute LED	Illuminates when audio output is muted.
RF LED	ON = Linked transmitter is on Flashing = Searching for transmitter OFF = Linked transmitter off or transmitter unlinked
Channel button	Press to select and edit channel.
Group button	Press to select and edit group.

Tuner Mode

Flat indicator	Illuminates when note is flat.
Tuning bar display	LEDs illuminate to indicate tuning deviation.
Sharp indicator	Illuminates when note is sharp.
Note display	Displays the name of the note or (--) if the tuner is idle.
Mode button	Press to enter tuner menu settings.
Arrow buttons	Use ▲ ▼ buttons to select and edit menu settings.
Frequency detuned/Ref erence pitch offset indica tor	A dot is displayed when the tuning or pitch has been set to a non-standard value. Note: Non-standard tuning or pitch settings scroll across the receiver display during power-up.

Set Up the Receiver

1. Connect the PS24 power supply to the receiver and plug the cord into an AC power source.
2. Connect the transmitter to the instrument.
3. Connect the audio output to an amplifier or mixer.

Note: The receiver powers on after the power supply and ¼" cable are connected.

Bodypack Transmitter

1. Antenna
   Carries wireless signal.
2. Status LED
   LED color and state indicate transmitter status.
3. Power switch
   Turns the transmitter on/off.
4. TA4M input port
   Connects to a 4-Pin mini connector (TA4F) microphone or instrument cable.
5. USB-C charging port
   Connect to USB battery charger.
6. Link button
   • Press and hold within 5 seconds of power-on to manually link with receiver.
   • Press momentarily to activate remote ID function.
7. Battery compartment
   Holds 1 Shure rechargeable battery.

Transmitter Status LED

LED is green during normal operation.

LED color or flashing indicates a change in transmitter status as shown in the following table:

Color	State	Description
Green	Flashing (slow)	Transmitter attempting relink with receiver
	Flashing (fast)	Unlinked transmitter searching for receiver
	Flashes 3 times	Indicates locked transmitter when power switch is pressed
Red	On	Battery life < 1 hour
	Flashing	Battery life < 30 minutes
Red/Green	Flashing	Remote ID active
Amber	Flashing	Battery error; remove and insert again, or replace battery

Wearing the Bodypack

Clip the bodypack to a belt or slide a guitar strap through the bodypack clip as shown.

For best results, the belt should be pressed against the base of the clip.

Install Transmitter Batteries

Always fully charge a new battery before first use.

1. Move the locking lever to the open position and slide the battery door open.
   
2. Place the battery into the transmitter.
3. Close the battery door.

Batteries and Charging

GLX-D+ transmitters are powered by Shure SB904 lithium-ion rechargeable batteries. Advanced battery chemistry maximizes runtimes with zero memory effects, eliminating the need to discharge batteries prior to charging.

When not in use, recommended battery storage temperature is 10°C (50°F) to 25°C (77°F).

Note: The transmitter will not pass RF or audio signals when connected to the charging cable.

The following battery charging options are available:

Charging from an AC Power Source

1. Plug the charging cable into the charging port on the transmitter.
2. Plug the charging cable into an AC power source.

Charging Status LEDs

LED Color	Description
Green (solid)	Device is fully charged
Red (solid)	Charging
Amber (flashing)	Out of temperature range, or battery error
Off	Power supply is disconnected, or no device is docked in the charging bay

Charging Times and Transmitter Runtimes

Use the following table to determine approximate battery runtime based on the duration of charging time when in 5.8 GHz mode. Times shown are in hours and minutes. Transmitters automatically power off after approximately 1 hour to conserve battery life if the signal from a linked receiver is not detected.

Receiver Bay or AC Power Source Charging	Transmitter Runtime
0:15	up to 1:30
0:30	up to 3:00
1:00	up to 6:00
3:00	up to 11:30*

Note: If receiver is powered off and remains plugged in, battery will continue charging.

Transmitter Battery Meter

The number of segments illuminated on the meter indicates the remaining battery life for a linked transmitter:

1. = > 30 min
2. = > 2 hours
3. = > 4 hours
4. = > 6 hours
5. = > 8 hours
6. = > 10 hours
7. = > 11.5 hours

Note: The LEDs will cycle on/off while battery life is being calculated.

Important Tips for Care and Storage of Shure Rechargeable Batteries

Proper care and storage of Shure batteries results in reliable performance and ensures a long lifetime.

• Always store batteries and transmitters at room temperature
• Ideally, batteries should be charged to approximately 40% of capacity for long-term storage
• During storage, check batteries every 6 months and recharge to 40% of capacity as needed

Tips to Improve Wireless System Performance

If you encounter interference or dropouts, try the following suggestions:

1. Frequency TablesPlace receiver at least 3 meters (10 feet) away from Wi-Fi access points, computers, or other active 2.4 GHz and 5.8 GHz sources.
   • Avoid heavy Wi-Fi traffic activities such as downloading large files or viewing a movie.
   • Turn on any Wi-Fi prior to turning on receivers and scanning for the best channel. MReduce transmitter-to-receiver distance by placing receivers on stage or above the audience with a clear line of sight to the transmitter.
     • Move receiver to the top of the equipment rack for a clear line of sight.
     • Mount antennas remotely to place closer to transmitters and improve RF reliability if receivers cannot be moved closer.
     • Make sure people do not block the line of sight between receiver and transmitter.

Additional Tips

• Do not place competitive 2.4 GHz and 5.8 GHz receivers near GLXD4R+ receivers.
• Scan for the best available channel by pressing the channel button.
• Keep transmitters more than 2 meters (6 feet) apart. This is less critical with shorter receiver-to-transmitter distances.
  Note: If transmitters are within 6 inches of non-GLX-D+ transmitters or microphone cartridges, audible noise is possible.
• Move transmitter and receiver away from metal or other dense materials.
• During sound check, mark trouble spots and ask performers to avoid those areas.

Receiver Operation

Audio Gain Adjustment

Transmitter gain has an adjustment range from -20 dB to +40 dB in 1 dB increments.

Tip: Try the 0 dB (unity gain) setting as a starting point, and then make gain adjustments if necessary.

1. Press and hold the mode button on the receiver until dB appears on the display.
   
2. Press the up/down arrows to adjust the gain. For faster adjustments, press and hold the buttons.
   

Note: The intensity of the green audio LED corresponds to the audio level. Rapid flashing indicates audio clipping. Reduce the gain to remove the overload.

Locking and Unlocking the Controls

The controls of the receiver and transmitter can be locked to prevent unauthorized setting changes or power off. The lock status is not changed by power cycles.

Locking the Receiver Controls

Simultaneously press and hold the group and channel buttons until LK appears on the screen. Repeat to unlock.

• LK is displayed if a locked control is pressed
• UN is displayed momentarily to confirm the unlock command

Locking the Transmitter Controls

To lock directly from the transmitter:

Start with the transmitter off, then press and hold the link button while turning on the transmitter. Release the link button when the transmitter powers on to prevent an accidental factory reset. The lock icon appears on the receiver screen when locked. Repeat sequence to unlock.

To lock from the receiver front panel:

Simultaneously press and hold the group and link buttons for approximately 2 seconds until the flashing lock icon appears on the receiver screen. Repeat sequence to unlock.

Note: The transmitter status LED will flash if a locked switch is set to the off position.

Identifying Linked Transmitters and Receivers with Remote ID

Use the remote ID feature to identify linked transmitter and receiver pairs in multiple receiver systems.

To activate remote ID:

1. Momentarily press the link button on the transmitter or receiver.
2. The screen of the linked receiver will blink and display ID, while the status LED on the linked transmitter will flash red/ green.
3. To exit remote ID mode, momentarily press the link button or allow the function to timeout.

Receiver Band Modes

There are 3 band modes available for GLXD+ receivers.* The band mode options are:

• 2.4 GHz-only mode
• 5.8 GHz-only mode
• Best band mode - 2.4 and 5.8 GHz (default)

Note: region dependent

To change the band mode:

1. Press and hold the channel button while powering on the receiver. Continue to hold the channel button for approximately 5 seconds until the band selection menu opens.
2. Press the up/down gain button to select a band mode. The screen will flash momentarily and scan for the best channel to use.

Note: Linked receivers and transmitters must be able to operate in the same band. Transmitters that don't support the selected band mode will unlink from the receiver.

Tuner Menu

Enter tuner mode by pressing the footswitch.

In tuner mode, the controls will only affect tuner functions. RF and audio settings are not affected.

Note:

• Wired use: Wired input does not load the guitar signal, eliminating the need for bypass switches. The unit passes wired signal if power is lost to the pedal.
• Wireless use: Bypass does not apply because the pedal needs to be powered on to receive wireless signal.

Tuner Options

• Indicator: Needle or Strobe
• Output: Live, Mute, Both, or A/B
• Display Brightness
• Detune
• Sharps and Flats
• Reference Pitch

Selecting and Editing Tuner Menu Settings

Use the following buttons to select and edit the tuner menu settings:

• Use the mode button to access the menu and scroll between menu settings.
• Use the ▲ ▼ buttons to change a menu parameter.
• Use the footswitch to enter and save parameter changes.

Indicator: Needle or Strobe

The tuner indicator can be set to display a needle style or strobe style.

Needle

A single LED will illuminate on the tuning bar to indicate sharp or flat. The green center LED will illuminate when the note is in tune.

Strobe

A sequence of three LEDs will travel across the tuning bar in the direction of sharp or flat. The LEDs will remain stationary when the note is in tune.

Note: Indicator and Output settings are displayed in a scroll from left to right.

Choosing Audio Output

Set the audio output to the following modes when the footswitch is pressed in tuner mode.

Note: Text for the output settings are displayed in a scroll from left to right.

Mode	Footswitch Function
Live	Receiver Display (audio Live) ↔ Tuner Display (audio Live)
Mute	Receiver Display (audio Live) ↔ Tuner Display (audio Mute)
Both*	Tuner Display (audio Mute) ↔ Tuner Display (audio Live)
A/B**	Tuner Display (audio Live) ↔ Tuner Display (audio Live)

* In Both mode, the pedal powers up in Receiver Display. Press the footswitch to enter tuner mode.

**In A/B mode, press the footswitch to easily switch between your transmitter (TX) and wired input (IN).

Display Brightness

The receiver has a built-in light sensor to automatically adjust the display brightness.

To manually adjust the brightness choose one of the following settings:

Detune

The tuner can be set to display standard tuning for instruments that have been detuned up sharp or flat in the following increments:

• Up to 5 steps sharp (#1-#2 -#3-#4-#5)
• Up to 6 steps flat (b6-b5-b4-b3-b2-b1)

The notation for standard tuning is b0

Note: A dot appears on the display as a reminder that the pedal is detuned.

Sharps and Flats

Adds sharp or flat symbols to the display of non-natural notes.

Reference Pitch

The reference pitch can be offset from standard A440 in a range of 432 Hz to 447 Hz in 1 Hz increments.

When adjusting the pitch, the last 2 digits of the value will be displayed. For example, "32" would appear on the display when the pitch has been set to 432 Hz.

A dot appears on the display as a reminder that the reference pitch has been offset.

Using the Tuner

1. Press the footswitch to enter tuner mode.
2. Play each note individually. The display shows the name of the note.
3. Adjust tuning until both indicators illuminate and the needle or strobe indicate that tuning is correct.

Needle Mode

Both tuning indicators and the center green segment will illuminate when the note is in tune.

Strobe Mode

Both tuning indicators will illuminate and the strobe segments will remain stationary when the note is in tune.

Using a Third-Party Power Supply

To power your wireless receiver pedal, we recommend using the included power supply or a power supply with isolated power outputs.

If using a power supply with isolated power outputs, use a power outlet rated at a minimum of 400 mA.

However, if using other third-party power supplies:

• Check the power consumption for each pedal in a daisy-chain setup. You must know the total power consumption for all of your pedals to avoid overloading the power supply.
• If no power requirement is listed on the pedal, consult the pedal manufacturer.
  
  

Firmware

New versions of the firmware can be uploaded and installed using the Shure Update Utility tool.

Download Shure Update Utility from shure.com

To update your firmware, connect the device to your computer using a USB-C cable and open the Shure Update Utility.

Resetting Components

Use the reset function if it is necessary to restore the transmitter or receiver to their factory settings.

Resetting the Receiver

Restores the receiver to the following factory settings:

• Gain level = default
• Controls = unlocked

Press and hold the link button while turning on the receiver power until the display shows RE.

Note: When reset is complete, the receiver will automatically initiate linking to search for a transmitter. Press and hold the transmitter link button within five seconds of powering-on to complete the link.

Resetting the Transmitter

Restores the transmitter to the following factory settings:

• Controls = unlocked

Press and hold the transmitter link button while turning on the transmitter until power LED turns off.

When the link button is released, the transmitter will automatically initiate linking to find an available receiver. Press the link button on an available receiver to relink.

Troubleshooting

Issue	Indicator Status	Solution
No sound or faint sound	Receiver RF LED on	Verify all sound system connections or ad just gain as needed. Verify that the receiver is connected to mix er/amplifier.
	Receiver RF LED off	Turn on transmitter. Make sure the batteries are installed correct ly. Link transmitter and receiver. Charge or change transmitter battery.
	Receiver display off	Make sure AC adapter is securely plugged into electrical outlet. Make sure receiver is powered on.
	Transmitter indicator LED flashing red	Charge or change transmitter battery.
	Transmitter plugged into charger.	Disconnect transmitter from charger.
Audio artifacts or dropouts	RF LED flickering or off	Change receiver and transmitter to a differ ent group and/or channel. Identify nearby sources of interference (cell phones, Wi Fi access points, signal proces sor, etc.) and shutdown or remove source. Charge or change transmitter battery. Ensure that receiver and transmitter are po sitioned within system parameters. System must be set up within recommended range and receiver kept away from metallic surfaces. Transmitter must be used in line of sight from receiver for optimal sound.
Distortion	OL indicator appears on receiver display	Reduce transmitter gain.
Transmitter and receiver link unsuccessful	Transmitter and receiver LEDs flash to indicate that linking started, but the link fails	Update both components to the latest firmware version.
Sound level variations when switching to dif ferent sources	N/A	Adjust transmitter gain as necessary.
Receiver/transmitter won't turn off	Transmitter LED flash ing rapidly	Controls locked.
Receiver gain control cannot be adjusted	N/A	Check transmitter. Transmitter must be on to enable gain changes.
Receiver controls cannot be adjusted	LK shown on receiver display when buttons are pressed	Controls locked.
Transmitter ID function does not respond	Transmitter LED flashes green 3 times	Controls locked.
Transmitter information does not appear on the receiver display	N/A	Linked transmitter is off or the receiver is not linked to a transmitter.
Transmitter powers off after 1 hour	Transmitter status LED off	Transmitters automatically power-off after 1 hour to conserve battery life if the signal from a linked receiver is not detected. Make

Accessories

Cable, Instrument, 2.5 foot (.75 m), 4 Pin Mini Connector (TA4F) to 1/4 inch Connec tor.	WA302
Cable, Instrument, 2-foot (0.7m), 4-pin Mini Connector (TA4F) with Right-Angle 1/4- inch Connector, used with Shure Wireless Bodypack Transmitters	WA304
Shure Rechargeable Battery	SB904
USB-C Battery Charger	SBC10-USBC
Premium Guitar Cable TQG Threaded Connector	WA305
Power Supply	PS24

Specifications

Tuning Bandwidth

Z2	2400 - 2483.5 MHz
Z3	2400 - 2483.5 MHz and 5725 - 5850 MHz
Z4	2400 - 2483.5 MHz and 5725 - 5875 MHz
Z5	2400 - 2483.5 MHz and 5725 - 5825 MHz

Dependent on frequency band

Transmit Mode
Shure proprietary digital

RF Output Power
10 mW E.I.R.P. maximum

Operating Temperature Range
0°C (32°F) to 50°C (122°F)

Polarity
Positive voltage applied to the tip of the guitar cable phone plug produces positive voltage at the tip of the high impedance ¼-inch output

Audio Frequency Response
20 Hz – 20 kHz

Dynamic Range
120 dB, A-weighted

RF Sensitivity
-88 dBm, typical

Total Harmonic Distortion
0.02%, typical

Battery Life
Up to 11.5 hours

Guitar Tuner

Tuning Accuracy	±1 cent
Tuning Range	F#0 to C8

Channel Count
Up to 4 typical, 8 optimal
2.4 GHz only: Up to 4 typical, 5 optimal

GLXD6+

Power Requirements
9 V – 15 V, 400 mA (efficiency level VI power supply)

Antenna Type
Dual-band PIFA

Dimensions
5.4 x 3.7 x 1.89 in. (138 x 95 x 48 mm)

Weight
19.75 oz (560 g)

Housing
Aluminum alloy

Spurious Rejection
> 35 dB, typical

Gain Adjustment Range
-20 to 40 dB in 1 dB steps

Audio Input Modes
Tuner or True Bypass

AUDIO OUTPUT

Configuration
6.35 mm (1/4") output
Impedance balanced

Impedance
6.35 mm (1/4") output
100 Ω (50 Ω, Unbalanced)

Maximum Audio Output Level
6.35 mm (1/4") connector (into 3 kΩ load)
+8.5 dBV

Pin Assignments
6.35 mm (1/4") connector
Tip=audio, Ring=no audio, Sleeve=ground

RECEIVER ANTENNA INPUT

Impedance
50 Ω

Maximum Input Level
-20 dBm

GLXD1+

Power Requirements

Shure Rechargeable Li-Ion Battery	SB904
USB Power Supply (US/Canada)	SBC10-USB15WSUSTWJ

Antenna Typ
Dual-band Internal Monopole

Dimensions
4.5 x 2.6 x 1.1 in. (115 x 66.94 x 28.51 mm), (H x W x D)

Weight
5.4 oz (153.1 g), without battery

Housing
Aluminum alloy, ABS plastic

Input Impedance
900 kΩ

TX INPUT

Connector
4-pin male mini connector (TA4M)

Maximum Input Level
+8.4 dBV (7.5 Vp-p)

Configuration
Unbalanced

Pin Assignments

1	Ground (cable shield)
2	+ 5 V bias
3	Audio
4	Tied through active load to ground (on instru ment adapter cable, pin 4 floats)

SB904

Battery Type
Rechargeable Li-Ion

Nominal Capacity
2420 mAh (8.71 Wh)

Nominal Voltage
3.6 V

Dimensions
2.87 x 0.83 x 0.82 inches (72.8 x 20.96 x 20.80 mm), (H x W x D)

Weight
1.89 oz. (53.7 g)

Housing
PC/ABS

Ambient Temperature Range

Charging:	0°C (32°F) to 40°C (104°F)
Operating:	18°C (0°F) to 45°C (113°F)

SBC10-904

DC Input Voltage
5 V

Ambient Temperature Range
Operating:
0°C (32°F) to 40°C (104°F)

SBC10-USB15W Power Supply

Input Voltage Range
100 to 240 V AC

Maximum Input Power
600 mA @ 100 V AC (full load)

Output Voltage
5 v DC @ 3 A

Maximum Output Power
15 W

SBC10-USB Power Supply

Input Voltage Range
100 to 240 V AC

Maximum Input Power
200 mA @ 100 V AC (full load)

Output Voltage
5 v DC @ 1 A

Maximum Output Power
5 W

Diagrams