TEST: Shure GLXD16

 There are now countless guitar and bass transmitters in the 2.4 GHz range. The low-cost range in particular is covered by a large number of products, so that one could believe that the market is sufficiently covered here too. So why does a renowned manufacturer like Shure go ahead and bring a transmitter system like the Shure GLXD16 onto the market in this frequency band for a retail price of €409, which clearly occupies pole position in this frequency segment in terms of retail price? Certainly not without corresponding qualitative ulterior motives! This test shows to what extent this calculation works.

Structure and concept of the Shure GLXD16

First of all, why is a guitar transmitter located in the 2.4 GHz range in the first place? Well, the concept is known to have several advantages and disadvantages. The undisputed biggest advantage is the fact that this frequency can be used worldwide without any license. No restricted use in some countries, no license fees for exclusive use in less used bands. Another advantage is the consistently good sound that can be achieved in this frequency band, although the degree of compression still varies towards a high-quality cable.

The two biggest disadvantages, however, are the constant competition from almost all mobile phones, which are still operating in the most prioritized WLAN 2.4 GHz band and are even latently searching for this frequency in the LTE range, which means that hundreds, even thousands of competitors in the immediate vicinity are fighting with you for the transmission range on this frequency. Disadvantage number 2 is the reduced range, which is known to decrease proportionally with increasing transmission frequency and only comes close to the 10 meter mark for cheap products in the 2.4 GHz range. This is also the reason why other products above this limit have not been able to establish themselves, provided that the legally prescribed maximum transmission power is adhered to. The trick is therefore to make maximum use of the advantages of the frequency, equip the product with additional, useful features and reduce the disadvantages to a minimum.

Like most guitar transmitters, the Shure GLXD16 consists of two units, the transmitter and the receiver, which brings us to the first advantage of the system. The receiver is also a solid floor tuner, whose large, two-digit display in combination with a thirteen-digit LED chain and two arrow LEDs provides information about several functions. Three additional LEDs below the display provide information about the input level, the mute function and the connection to the transmitter. Four additional push buttons can be used to pre-select different groups, edit tunings and select display methods such as arrow display or strobe.

The housing is extremely solid and rests on a rubber mat with two small rubber feet. To protect the displays and push buttons from the soles of your shoes, two raised areas have been attached to the right and left sides of the housing, which also house the system's receiving antenna. A 12 V / 400 mA power supply is included for operation, but the receiver is very flexible in terms of its power supply and processes everything between 9 and 15 volts and a minimum current of 250 mA, which should be found in any better floorboard multi-power supply. The tuner can be switched off if necessary using a small slider and new firmware can be loaded via a USB port on the opposite side of the housing if necessary.

Let's get straight to a point that may not seem so spectacular at first glance, but for me personally is the absolute highlight of the receiver. In normal operation without an activated tuner, the first seven LEDs in the tuner chain show the charge level of the transmitter unit. I don't know how often I have wished for this actually quite simple solution on a floor receiver. The problem is always the same, in the already extremely tense situation on stage, there are sudden interruptions in the signal flow, which can be due to an empty battery, among other things. One look at the charging indicator in combination with the RF field strength LED and there is no point in error. No more tedious tugging on the guitar and strap to bring the necessary information on the transmitter unit into view, simply great!

The transmitter unit

The transmitter of the Shure GLXD16 system is in no way inferior in terms of solid construction. A solid metal housing combined with a very stable retaining clip ensure a lot of confidence in the user and should also survive a fall after accidentally slipping off the strap. Another special feature is the use of a battery, which according to the manufacturer puts everything I have come across in terms of operating time in the shade. With maximum charging, which can take up to 4 hours depending on the charging current used, the system can be operated for up to 11.5 hours under optimal conditions, i.e. 5 shows of 2 hours each should not be a problem.

The transmitter is charged via a USB port either using the power supply unit supplied or a regular mobile phone power supply. A single, three-color LED not only informs about the charging status (green = everything is fine, red on = approx. 1 hour reserve, red flashing = less than 30 minutes), it also informs about any connection searches and any blocking. During charging, this LED also provides information about the charging progress. The only bad thing is the color yellow when it is flashing, as this always indicates a defective battery. As always in this performance class, the transmitter is connected to the instrument with a nearly 80 cm long mini XLR / jack cable, which is an in-house product of high quality. The transmitter antenna used is installed in a cylindrical protrusion for better transmission performance and has approximately the same dimensions as the screw attachment of the mini XLR cable.

The Shure GLXD16 in practice

Before using the Shure GLXD16, you should perhaps consider the special features of the 2.4 GHz transmitters. On the one hand, 2.4 GHz transmitters have a little more difficulty penetrating solid structures such as walls than their MHz competitors, and on the other hand, in open fields and large halls, they have the disadvantage of a slightly shorter range, as there are fewer, or no, reflective surfaces. With these aspects in mind, the Shure system had a much larger buffer in my head in terms of the range of the system than I would expect from MHz systems, for example.

However, as it turned out, my buffer should not be used at all. The system delivered by far the best value that I have been able to achieve with a 2.4 GHz transmitter so far. I could not quite reach the 40 meters mentioned by the manufacturer under optimal conditions, but 30 meters and more were no problem. which is almost the same size as the two large Wacken Open Air stages. As I said, it's all about the spatial dimensions; to what extent the system can withstand the strong stage radio of such stages, I would only have been able to test in the summer of next year in 2022, when I will be playing on the Wacken stage, among other things.

The Shure GLXD16's values ​​were also excellent when it came to penetrating walls. Despite a KS and an additional plasterboard wall, the system still managed almost 20 meters, a value that is well above average. In terms of sound, there was no noticeable difference in frequency to a high-quality cable, in this case Cordial, although the compression level was a little higher than with a cable, which has the advantage of a tighter, denser sound, but at the expense of the dynamic levels. As always in this area, there is no better or worse, just taste.

The guitar cable is really very long at 80 cm and also allows the transmitter to be positioned very high on the guitar strap. If you place the transmitter a little lower, you should wrap the cable around the rear guitar pin 1-2 times, as the same cable is otherwise likely to dangle at knee height.

Conclusion

With the Shure GLXD16, the American manufacturer has what is probably currently the best 2.4 GHz guitar/bass transmitter in its portfolio. Processing, concept, range and detailed solutions such as reading the charge level of the transmitter on the floor unit are in the absolute top league for tuner/guitar transmitter combinations. Anyone looking for a very compact but powerful guitar transmitter for the floorboard should definitely try out the product.

——————-

Additional Informations:

### The History of Shure Incorporated

Shure Incorporated, a name synonymous with high-quality audio equipment, has a storied history that spans nearly a century. Founded in 1925 by Sidney N. Shure, the company has grown from a small supplier of radio parts into a global leader in audio electronics, renowned for its microphones, headphones, and wireless systems. This article explores the evolution of Shure Incorporated, detailing its milestones, innovations, and enduring impact on the audio industry.

#### Early Beginnings

The origins of Shure Incorporated trace back to the 1920s, a period marked by the burgeoning popularity of radio technology. Sidney N. Shure, a young entrepreneur with a keen interest in electronics, recognized the potential of the radio market and established the Shure Radio Company in Chicago, Illinois, in 1925. The company initially focused on selling radio kits, which allowed enthusiasts to assemble their own radios at home. These kits were popular among hobbyists, fueling the early success of Shure Radio Company.

By 1928, the company had transitioned from selling radio kits to distributing radio parts and accessories. This shift was driven by the increasing availability of commercially manufactured radios, which reduced the demand for DIY kits. Shure's strategic pivot to radio parts distribution allowed the company to maintain its relevance in the rapidly evolving radio industry.

#### Innovation and Expansion

The Great Depression of the 1930s posed significant challenges for businesses across the United States. Despite the economic downturn, Shure continued to innovate and adapt. In 1931, the company introduced its first original product: the Model 33N, a carbon microphone. This marked Shure's entry into the microphone market, a decision that would prove pivotal for the company's future.

The Model 33N was followed by the introduction of the Model 70, a crystal microphone, in 1932. These early microphones established Shure's reputation for quality and reliability. As the demand for public address systems grew, Shure's microphones became essential tools for public speaking, broadcasting, and entertainment.

The 1930s also saw Shure expanding its product line to include phonograph cartridges. The development of the Model 99A, Shure's first phonograph pickup, in 1937, showcased the company's ability to diversify its offerings and cater to the needs of a broader market. This diversification helped Shure weather the economic challenges of the era and laid the groundwork for future growth.

#### World War II and Technological Advancements

World War II brought about significant changes in the manufacturing landscape, with many companies shifting their focus to support the war effort. Shure was no exception. During the war, the company supplied microphones and communication equipment to the U.S. military. This period of collaboration with the military not only bolstered Shure's reputation for quality but also spurred technological advancements.

One of the most notable developments of this era was the creation of the T-17B microphone, commonly known as the "Green Bullet." Designed for military communication, the Green Bullet was praised for its ruggedness and reliability. Its success in military applications paved the way for its adoption in civilian uses after the war, particularly among harmonica players who appreciated its distinctive sound.

#### Post-War Expansion and the Unidyne Microphone

The post-war period was a time of rapid expansion and innovation for Shure. In 1949, the company introduced the Unidyne Model 55, a groundbreaking dynamic microphone that featured a unidirectional pickup pattern. The Unidyne's ability to isolate the sound source while minimizing background noise made it an instant hit in various applications, from broadcasting to live performance.

The iconic design of the Unidyne Model 55, with its distinctive silver grille, became a symbol of Shure's commitment to excellence. This microphone's popularity endured for decades, and it remains one of the most recognizable microphones in the world.

Shure continued to build on the success of the Unidyne series with subsequent innovations. The introduction of the Unidyne III in the 1950s marked another milestone, as it featured an improved unidirectional element that further enhanced its performance. This era also saw Shure expanding its global presence, establishing subsidiaries in Europe and Asia to better serve international markets.

#### The Rise of Wireless Technology

The 1960s and 1970s were characterized by significant advancements in wireless technology, and Shure was at the forefront of this revolution. In 1966, the company introduced the Vocal Master, one of the first portable sound systems. This innovation catered to the needs of musicians and performers who required high-quality sound reinforcement on the go.

The development of wireless microphone systems in the 1970s marked a major leap forward for Shure. The introduction of the L Series in 1975 provided performers with the freedom to move without being tethered by cables, revolutionizing live performance and broadcasting. Shure's wireless systems quickly gained a reputation for their reliability and sound quality, making them a staple in the entertainment industry.

#### Continued Innovation and Modernization

As the audio industry continued to evolve, Shure remained committed to innovation and modernization. The 1980s and 1990s saw the introduction of several iconic products that solidified Shure's position as a leader in the field. The SM58, introduced in 1966, became the industry standard for live vocal performance, known for its durability and excellent sound quality. Its robust construction and ability to withstand the rigors of touring made it a favorite among musicians worldwide.

In 1996, Shure introduced the Beta 58A, an upgraded version of the SM58, which offered enhanced sensitivity and a tighter polar pattern. This microphone was part of the Beta series, which included a range of models designed to meet the specific needs of professional audio applications.

The turn of the millennium brought further advancements in digital technology. Shure embraced digital wireless systems with the introduction of the ULX-D and QLX-D series, which provided superior audio quality, extended range, and advanced encryption for secure transmission. These systems addressed the growing demand for reliable wireless solutions in an increasingly digital world.

#### Shure Today and Beyond

Today, Shure Incorporated stands as a global leader in audio technology, with a diverse product portfolio that includes microphones, headphones, wireless systems, and conferencing solutions. The company continues to uphold its legacy of quality and innovation, driven by a commitment to meeting the evolving needs of its customers.

Shure's dedication to research and development has led to numerous awards and accolades, reflecting its status as a trusted name in the industry. The company's products are used by professionals in music, broadcasting, theater, and corporate environments, attesting to their versatility and reliability.

One of the key factors in Shure's enduring success is its focus on customer satisfaction. The company places a strong emphasis on understanding the needs of its users and providing exceptional support and service. This customer-centric approach has helped Shure build lasting relationships with its clients and maintain its reputation for excellence.

Looking to the future, Shure remains committed to pushing the boundaries of audio technology. The company continues to explore new frontiers, from advanced digital signal processing to innovative microphone designs. As the audio landscape evolves, Shure is well-positioned to lead the way, driven by its legacy of innovation and its unwavering commitment to quality.

#### Conclusion

The history of Shure Incorporated is a testament to the power of innovation, adaptability, and a relentless pursuit of excellence. From its humble beginnings as a radio parts distributor to its current status as a global leader in audio technology, Shure has consistently set the standard for quality and reliability. Through nearly a century of technological advancements and industry changes, Shure has remained at the forefront, driven by a passion for sound and a commitment to meeting the needs of its customers.

As Shure looks to the future, it continues to build on its rich heritage, exploring new possibilities and setting new benchmarks in the world of audio. With a legacy of groundbreaking innovations and a dedication to excellence, Shure is poised to shape the future of audio technology for generations to come.