Advanced digital wireless system offers excellent audio clarity, intelligent charging, and seamless operation in multi-system applications. Features include Advanced Frequency Manager for improved RF performance and patented data communication.
- Available Transmitter Form factors: Handheld, Bodypack
- Operating range (up to): 20-30 m (Under typical conditions)
GLX-D Advanced Frequency Manager
- Provides advanced automatic frequency management to a linked receiver community for improved RF performance and increased channel count
- Coordinates GLXD4R receiver scans of the 2.4 GHz RF environment
- Guarantees use of the clearest possible transmission and backup frequencies.
- Link multiple GLXD4R receivers via RF ports for traditional antenna distribution
- Allows for remote mounting of antennas in optimal locations for increased signal stability
- Link up to six GLXD4R receivers per Frequency Manager
- Link up to nine GLXD4R receivers in typical application environments (up to 11 under optimal conditions). Two GLX-D Frequency Managers required for communities of more than six receivers.
- Uses patented data communication via RF cables to create and manage the receiver community (US Patent: US9019885 B2)
- LINKFREQ Automatic Frequency Management - revolutionary intelligent frequency management quickly identifies the best open group and channel frequencies
- Bi-directional communication link enables transmitters to follow receiver frequency changes automatically
- Identifies and assigns optimal frequencies to receiver and transmitter pairs
- In case of interference, automatically and seamlessly transitions to backup frequencies
- Provides power to the GLXD4R receivers, eliminating need for power strips or multiple outlets
- Globally-unlicensed 2.4 GHz frequency band
GLXD4R Rack-Mountable Receiver
- Integrated battery charge port for proprietary Shure lithium-ion transmitter batteries, two-color charge indicator LED
- Green: Charged
- Flashing Green: 90% charged
- Red: Charging
- Detachable antennas for remote mounting
- Remote adjustable transmitter gain control
- Hi-res LCD screen status display. Real-time battery run-time displayed in hours and minutes (accurate within +/- 15 minutes)
- XLR and ¼” output connectors
- Rugged metal chassis design
- Included rack mount hardware
GLX-D Advanced Transmitters
- Automatically links with GLX-D wireless receivers for seamless frequency changing
- Up to 16 hours of continuous, rechargeable use with Shure proprietary lithium-ion rechargeable batteries
- One battery included with every transmitter
- Batteries available as separate accessories (SB902)
- Operating range:
- Indoors: Up to 100 feet (30 m) typical with a maximum of 200 feet (60 m) under ideal conditions
- Outdoors: Up to 20 m (65 feet) typical with a maximum of 50 m (165 feet) under ideal conditions
- Legendary Shure Microphone options
- Available as bodypack or handheld transmitters
GLXD1 Bodypack Transmitter:
- Sophisticated design with rugged metal construction
- Tactile on/off switch
- Locking TA4M connection for use with Shure lavalier, headset, earset and instrument microphones and guitar cables
- Reversible belt clip
GLXD2 Handheld Transmitter:
- Integrated microphone capsule design
- Sophisticated design with durable, lightweight construction
GLX-D Advanced System Configurations
- VOCAL: available with choice of legendary SM58®, SM86, Beta® 58A or Beta® 87A microphone capsules. SM86 availability is regionally dependent.
- GUITAR: with WA302 (¼” – TA4F) guitar cable
- PRESENTER: available with choice of WL93, WL185 lavalier microphones or MX153 earset microphone
- HEADSET: with choice of SM31FH or SM35 headset microphone (regionally dependent)
- INSTRUMENT: available with Beta® 98H Instrument microphone
GLX-D Advanced Power Management
- Custom Shure rechargeable lithium-ion batteries
- Up to 16 hours of continuous, rechargeable use. 3 hour charge = up to 16 hours use; 1 hour charge = up to 6 hours use; 30 minute charge = up to 3 hours use; 15 minute charge = up to 1.5 hours use
- Accurate battery metering in hours / minutes (+/- 15 minutes) displayed on LED screen
- Up to 10,000 hours of regular use per individual custom lithium-ion battery. Compared against up to 2,500 alkaline batteries = $2,000 in battery costs when compared to the life on one lithium-ion rechargeable battery.
- Rechargeability options
- Charge battery alone
- GLXD4 integrated charge port
- SB902 GLX-D Lithium-ion battery – available separately
- Charge a spare battery while system is in use
- SBC902 USB battery dock charger (available separately)
- GLXD4 integrated charge port
- Charge battery in-transmitter
- SBC10-MICROB USB charge cable (included)
- SBC-USB USB wall charger (available separately)
- SBC-CAR USB car charger (available separately)
- SBC10-902 battery dock USB charger (available separately)
- Charge battery alone
What is the main difference between GLX-D Advanced Digital Wireless and the current GLX-D Wireless Systems?
GLX-D Digital Wireless Systems are not rack mountable. They store within their own carrying cases and feature high-quality sound, automatic frequency management and rechargeability.
The GLX-D Advanced Digital Wireless includes Frequency Managers, rack mount receiver systems, remote antennas and accessories. All these combine flexibly for applications such as houses of worship, schools, auditoriums and venues with multiple wireless system requirements.
What is “LINKFREQ Technology”?
LINKFREQ Automatic Frequency Management is the latest proprietary Shure wireless technology platform, developed specifically to optimize wireless transmitter and receiver performance in the 2.4GHz frequency band. Powering up a GLX-D receiver and transmitter establishes an automated link between them, and GLX-D receiver begins to continuously analyze the active RF spectrum and determine which frequencies are best for transmission. Once identified, the frequencies are deployed via the established link to both the transmitter and receiver, automatically setting both wireless components simultaneously.
Additionally, in the presence of RF interference, the GLX-D receiver and transmitter will seamlessly move together to clean frequencies with no audio signal interruption.
How do you optimize wireless performance?
To optimize wireless performance it is recommended to:
- Use GLX-D Advanced Frequency Managers linked to GLXD4R rack mount receiver systems for improved RF performance.
- PA805Z2-RSMA Passive Directional Antennas can both improve desired signal and minimize interfering signals. If an access point is next to the receivers, locate the Passive Directional Antennas further away from the receivers - even have the rear facing the access point.
- Locate receivers ~10FT away from 2.4GHz sources such as wireless access points, computers, and other Wi-Fi devices.
- Minimize distance from transmitters to receivers- this is true of all wireless systems and 2.4GHz is no different.
I already own GLX-D Digital Wireless systems. Can I use my GLXD4 or GLXD6 receivers with the GLX-D Frequency Manager to get additional systems on air?
Unfortunately, no. The GLX-D Frequency Manager is designed specifically to work with receivers that can be rack-mounted and have detachable antennas. GLXD4 and GLXD6 receivers do not have either of those features, so at best the GLX-D Frequency Manager could be used in conjunction with GLX-D rack mount systems alongside the systems you currently own.
Declarations of Conformity
Are digital wireless systems all WiFi?
Digital wireless doesn't mean that it's WiFi. It refers only to the type of data being transmitted by radio.
As an example, Shure's QLX-D and ULX-D systems both use UHF spectrum in the 470-790 MHz band, whereas the GLX-D system uses 2.4 GHz (2,400 MHz) WiFi. Don't worry, though, you're not going to start picking up other peoples' facetime calls on your receiver; while coexisting with WiFi, intelligent 2.4GHz systems consider this traffic as interference and avoid it automatically.
Are rechargeable batteries worth the extra cost?
Yes. As well as being green and good for the environment, the lithium ion rechargeable cells will save you money and simplify your inventory – cutting out last-minute trips to purchase AA batteries just before your gig (yep, we've all been there. Why are batteries SOOO expensive?!).
Here's a cost comparison of one transmitter that uses fresh batteries once a day, and is used 4 times per week. Prices of AA batteries were from the website.
It's clear that although the upfront cost for the rechargeable cell is greater, the cost savings kick in around the 1 year mark.
Are there different transmitters?
No. There is only one series of transmitters. These can be used with GLX-D receivers (GLXD4 and GLXD6) as well as with GLX-D Advanced receivers (GLXD4R).
Can I send it over my existing digital audio network?
A digital radio microphone system refers specifically to the RF modulation scheme. In the receiver this is converted into an analogue audio signal for connection to an analogue desk or a guitar amplifier.
There are an increasing number of applications where keeping the audio in the digital domain has advantages. Shure have teamed with Audinate to use the Dante Digital Audio Network Protocol. Only our ULX-D dual and quad receiver systems have this capability. The audio from these receivers can be streamed via a network to other Dante receivers. (While confusing at first, the ULX-D wireless receiver becomes a Dante transmitter…). Remember that there are specific network requirements in order to do this; primarily a low-latency gigabit network with Quality of Service features engaged. Learn more at the following link: https://www.audinate.com/resources/networks-switches
Can I use standard GLX-D Systems with the new GLX-D Advanced systems?
If you are not using the Frequency Manager, then the GLXD4R receiver operates similar to a GLXD4 receiver. In that case, follow the guidelines and best-practices for GLX-D.
If you are using the Frequency Manager, we recommend only one GLX-D standard system.
Does WiFi interfere with digital wireless?
Interference is always a concern when multiple services are sharing spectrum. Just like in our motorway example earlier, if there's more than on car on a road then a collision is possible. Our GLX-D system uses the same spectrum as WiFi (2.4 GHz), and so there is a chance of interference. To counteract this we need specialist technology that continually scans the 2.4GHz landscape to hunt out and avoid interference, leaving you with perfectly clean, interference-free audio.
Does digital mean no interference?
For 2.4GHz based digital systems, please see above.
For UHF based digital wireless systems, you need to coordinate your system to avoid external sources or interference in the same way you would an analogue system. The factor that swings in your favour, though, is the spectral efficiency of the system; so in the instance of getting interference, you are more likely to be able to avoid it. It's because the 'footprint' of digital wireless is way smaller than analogue, giving it more space in which to operate.
Some, more advanced digital systems (such as Shure ULX-D) have frequency diversity built-in. This permits two bodypacks to be used on two channels as a pair, to mic up one presenter for example. The audio from both packs is assessed by the receiver, and at any one moment, the best quality audio is routed to the receiver's XLR and Dante outputs, so if pack one goes bad, then the good pack's audio remains on. Admittedly, as soon as there is a break in the event, you need to replace the bad frequency with a clean frequency for pack one, but as far as the audience is concerned, you had no interference.
Does digital wireless still require antenna distribution and if so, can I use my existing distro/antenna?
GLX-D has fixed antennas and so does not need Antenna Distribution. That said, please still pay attention to antenna placement;
- Try to ensure line of sight
- Minimise transmission distance
QLX-D and ULX-D both use UHF spectrum and providing that your distros cover the RF range that your kit operates on, you'll be fine.
How does the audio compare? Is it true that digital wireless doesn't sound as good as analogue?
Ah, the age-old analogue vs digital question that is always laced with subjectivity. For wireless mics though, it's more objective.
On the whole, digital radio microphones will have more low end, top end and arguably sound more clear than analogue. This is due to a couple of reasons. Analogue systems are bound by the constraints of FM modulation which extends to highs around 15,000 Hz. Audio above this frequency is considered hard to hear at best, but it is noticeably missed when not present. This is especially true on bodypacks used for electric guitar where there will be more high-frequency content. The frequency response of digital systems such as ULX-D and QLX-D is 20Hz-20kHz, which results in a very full sound.
The other thing is, digital systems are not subject to noise picked up while being transmitted. In a digital transmitter, the first process applied to the incoming audio is the Analogue to Digital conversion. Now that the audio is represented in 0's and 1's, the transmitter will use what is typically a proprietary form of digital modulation to send this data. As the data being transmitted is digital, the receiver can perfectly recover the digital ones and zeros, thus recreating a perfect reconstruction of the original analogue sound – as well as avoiding picking up noise. This process also allows the frequency response to be much wider than analogue as we are no longer bound by the limitations of FM modulation.
How many channels I can run with GLX-D Advanced?
In an environment with no other WiFi devices you can run up to 11 channels. Under typical conditions (one WiFi channel is active) you can run up to 9 channels. The more WiFi channels active in an environment, the lower the max. amount of channels. Please be sure to use frequency manager.
How many systems can you use together?
The amount of systems you can run at any given time depends on the system you're using and the spectrum it operates in. To give you an example, a Shure GLX-D system allows you to use up to 8 systems together, but this requires the 2.4 GHz spectrum to be super clean. In normal circumstances, I would recommend using up to 4 systems together. If you need to regularly use more at once, then I'd (carefully) recommend using BLX or taking the jump to QLX-D.
Higher-end UHF based systems (such as QLX-D and ULX-D) can use up to 67 channels per frequency band. ULX-D also offers a High Density mode where up to 500 channels can be made to work together.
I have two channels of GLX-D Advanced. Is the Frequency Manager necessary?
No. When running two channels we recommend using the UA221-RSMA antenna splitter to split the incoming antenna signal to the two receivers
Is it licence free because it's digital?
The 2.4 GHz band is a license free part of spectrum and is available globally. It's limitations are the number of wireless microphones it can host; about 8 maximum. It's also relatively susceptible to interference as there are many other devices that use this band (mainly phones, tablets and laptops using WiFi). For this reason, we must build in features to avoid being caught out by interference (Interference Detection and Avoidance) as described in point #4.
Wireless systems operating in the UHF bands (QLX-D and ULX-D) require licencing just like any analogue radio microphone would; either a channel 38 license or a site-specific license.
What are the main differences between GLX-D and GLX-D Advanced?
The GLX-D Advanced receiver is rack-mountable and features detachable antennas. This allows users to use directional antennas, helping to increase system stability in environments with other WiFi sources.
The GLX-D Advanced Frequency Manager creates a shared group of frequencies for all receivers to use and automatically assigns frequencies to each receiver. If interference occurs, the frequency manager assigns new frequencies without audible dropouts.
What is the difference between Group A and B?
Group A is optimized for low latency (4 ms), ideal for a channel count of 6 systems, maximum 9.
Group B has a higher stability and a higher latency (7,3 ms), ideal if you experience interference or need to run 9 to 11 systems.
What's the range on digital wireless? Is it less than analogue?
The digital UHF systems have a similar range as other analogue UHF wireless microphone systems. There's no difference in the carrier frequency; the only difference is it's carrying digital information rather than analogue.
Systems operating in the 2.4 GHz band use a higher frequency to transmit audio and so will have a lower, or smaller operating range. Physics is physics.
Why do I need digital wireless? My stuff works fine RIGHT now!
Two words; spectral efficiency. Demand for wireless microphones increases year on year, while at the same time, the amount of clear spectrum available is shrinking. More mics in less space means it's going to get crowded pretty quickly, and the amount of radio 'space' each channel takes up needs to be reduced to keep up with demand. Wireless spectrum, after all, is a finite resource; there is only so much to go around. If the demand for wireless products across the board continues to increase at the current pace, all users will need to be more spectrally efficient (including consumer goods).
It's a bit like lanes on a motorway. Previously we had, say 8 lanes, and only 3 big-ass trucks needed to run simultaneously; not much traffic and plenty of space. Now we have 4 lanes and we're trying to run 20 trucks side by side; there's not a lot of space. Using efficient digital systems, it'd be like running 20 super-narrow trucks in the same 4 lanes; a solution that will actually work.
Why would I need encryption?
Radio microphones are used at a large number of events where sensitive information is shared. Without encryption, it's possible to receive the signal from a radio microphone on a separate receiver tuned to the same frequency and with a similar modulation scheme (digital or analogue as appropriate).
As unlikely as it many may be that anyone would spy and try to steal sensitive information, it unfortunately does happen in the interests of gaining a competitive advantage.
Analogue radio microphones cannot be encrypted. Digital data can be encrypted using the AES-256 standard so that the transmitter sends the encrypted data rather than the unencrypted source data. Now, if a digital receiver is tuned to the same frequency, but doesn't know the encryption key, no audio will be recovered; your sensitive information remains safe.