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Description
Shure QLXD24/B87A Digital Wireless Handheld Microphone System with Beta 87A Capsule (G50: 470 to 534 MHz)The Shure QLXD24 B87A rackmount digital wireless handheld microphone system provides performers, presenters, and broadcasters with professional quality audio, reliable RF performance, and secure AES 256 bit encryption. Rugged and easy to use, it is ideal for sound reinforcement applications in medium sized venues and houses of worship as well as A V installations in conference, educational, and corporate facilities. The system operates in the UHF band
The Shure QLXD24/B87A rackmount digital wireless handheld microphone system provides performers, presenters, and broadcasters with professional-quality audio, reliable RF performance, and secure AES 256-bit encryption. Rugged and easy-to-use, it is ideal for sound-reinforcement applications in medium-sized venues and houses of worship as well as A/V installations in conference, educational, and corporate facilities.
The system operates in the UHF band to transmit pristine 24-bit/48 kHz digital audio with clarity, accurate low end, and crisp transient response. It utilizes Digital Predictive Switching Diversity to protect the transmission from interference and deliver solid RF signal stability without audio artifacts. You can run up to 60 mic channels at the same location.
The QLXD24/B87A includes the QLXD2 handheld transmitter featuring an interchangeable capsule design and equipped with a Beta 87A condenser capsule. The supercardioid pickup pattern focuses on the voice, helping to reduce feedback on loud stages. The lightweight transmitter provides up to 9 hours of operation on two AA batteries, with selectable 1/10mW RF power and a transmission range up to 330'.
The receiver features audio and RF meters, 60 dB of gain control, and both mic/line XLR and 1/4" instrument outputs. A large LCD screen and intuitive controls let you quickly make adjustments, even in low-light situations. Additional features include automatic frequency scanning, IR sync, and internal limiting to prevent clipping.
The Ethernet port allows multiple receivers to be easily networked together for simplified frequency coordination and deployment via Shure's Wireless Workbench (WWB) software.
Key Features
- For Presenters and Performers
- Beta 87A Condenser Supercardioid Mic
- Handheld Transmitter
- Switching-Diversity Rackmount Receiver
- 2560 Auto-Scan Frequencies
- Selectable 1/10mW RF Power
- LCD Display, Ethernet Port
- Interchangeable Capsule Design
- 9-Hr AA Batteries
- Expandable to 60 Mic Channels/330' Range
Rugged Handheld Transmitter with Beta 87A Condenser Supercardioid Capsule
- The durable QLXD2 handheld transmitter offers a lightweight, ergonomic design and is comfortable to hold.
- The transmitter features a backlit LCD that displays essential information and provides fast menu access. It can be locked out to prevent accidental changes during a performance. The adjustable input sensitivity on the transmitter accommodates a wide variety of speaking styles and mic levels. The transmitter syncs to the receiver via infrared with a quick press on the Sync button.
- The Beta 87A condenser capsule handles SPL levels up to 140 dB and offers a smooth frequency response with a gradual presence rise and controlled proximity effect tailored for vocals. Its supercardioid pickup pattern helps isolate the voice from unwanted background noise.
- The transmitter's interchangeable capsule design allows you to choose the ideal capsule for your application. Shure offers a variety of optional dynamic and condenser mic capsules with varying pickup patterns—capsules include the Beta 58A, SM58, SM86, SM87A, KSM8, and KSM9.
Robust Performance with Digital Switching Diversity Reception
- The system operates in the G50: 470 to 534 MHz UHF band with a 64 MHz tuning range and 2560 selectable frequencies.
- Digital Predictive Switching Diversity uses a microprocessor to switch antennas before dropouts occur.
- Two detachable 1/2 wave dipole antennas are included.
- 256-bit AES encryption offers unbreachable privacy by using a unique, randomized encryption key generated every time encryption is enabled.
- Low latency makes the system ideal for meetings that require live sound reinforcement.
Intelligent Hardware Simplifies Setup, Monitoring, and Control
- The receiver’s scanning function automatically finds, prioritizes, and deploys the cleanest frequencies to transmitters via IR sync.
- The receiver offers up to 60 dB of adjustable gain with an internal limiter that automatically engages to prevent digital clipping of your audio.
- Intuitive front-panel controls with audio and RF LED meters as well as a peak indicator, allow for quick visual checks.
- Ethernet networking enables real-time, precision monitoring and control of your system as well as automatic frequency coordination across multiple receivers, using Wireless Workbench software (WWB) for Mac/Windows.
- The system is compatible with external controllers such as AMX and Creston.
- Remote Control: Make adjustments from anywhere in the venue from your iPad/iPhone via the ShurePlus Channels Mobile App for iOS devices.
Smart Power Management Options
- Smart Power Management on Transmitter: The SB900A lithium-ion intelligent rechargeable battery with SBC charger (both available separately) provide extended transmitter battery life over alkaline batteries.
- The SB900A’s remaining battery life can be metered in hours and minutes from the receiver’s front panel.
Enhance the Reliability of Your System
- Adding UA874 active antennas or PA805 passive antennas increases the range of your system and offers increased protection against interference.
- The UA844+SWB antenna distribution system (available separately) lets you stretch the power of your antenna pairs, giving you more on-air channels in less setup time.
A Variety of Options to Meet Your Needs
Shure offers a bodypack transmitter with variety of lavalier and headset microphones to adapt your system as your needs evolve.
- The WL183 (omnidirectional), WL185 (cardioid), and WL184 (supercardioid) lavalier mics offer hands-free presentaton options.
- The miniature WL93 and subminiature MX150 mics are smaller, easy-to-conceal lavaliers.
- The discreet MX153 subminiature earset mic provides exceptional clarity in spoken word applications.
- The PGA31 is a comfortable, durable headset microphone for active performance.
Specifications
System
| Wireless Technology | Analog UHF |
| Number of RF Channel Frequencies | 2560 |
| Included Transmitters | 1 x Handheld |
| Diversity | Antenna Diversity |
| RF Frequency Band | G50: 470 to 534 MHz |
| RF Bandwidth | 64 MHz |
| Frequency Step Size | 25 kHz |
| Max Operating Range | 330' / 100.6 m |
| Max Transmitters per Band | 60 |
| Sample Rate/Resolution | 48 kHz / 24-Bit |
| Latency | < 2.9 ms |
| Dynamic Range | 120 dB |
| Encryption | AES 256 |
| Modulation | Proprietary |
Receiver
| Receiver Type | Tabletop |
| Mounting Options | Rackmount (with Included Hardware) |
| Rackmount Size | 1 RU (1/2 Rack) |
| Antenna | 2 x 1/2 Wave External, Detachable (Rear-Mount) |
| Number of Audio Channels | 1 |
| Audio I/O | 1 x XLR 3-Pin Male Balanced Output 1 x 1/4" TRS Female Balanced Output |
| Gain Range | -18 to +42 dB (1 dB Steps) |
| Pad | 30 dB |
| Audio Output Level | XLR Output: +18 dBV (Line Level) XLR Output: -12 dBV (Mic Level) 1/4" Output: +12 dBV (Instrument Level) |
| Phantom Power Protection | On 1/4", XLR Output |
| Network I/O | 1 x RJ45 (10/100 Mb/s) |
| Network Protocols | DHCP, Manual IP |
| Impedance | XLR Output: 100 Ohms (Balanced) 1/4" Output: 100 Ohms (Balanced) 1/4" Output: 50 Ohms (Unbalanced) |
| Adjacent Channel Isolation | >70 dB |
| Spurious | Rejection: >80 dB |
| Power Requirements | AC/DC Power Adapter |
| AC/DC Power Adapter | 12 VDC at 0.4 A, Center-Positive (Included) |
| AC Input Power | 100 to 240 VAC, 50 / 60 Hz at 150 mA |
| Display & Indicators | 1 x Backlit LCD (AF Level, Channel, Group, Menu Navigation, Metering, RF Level, Transmitter Battery Status) 1 x LED (Sync) 1 x LED (Peak) |
| Housing | Metal |
| Operating Temperature | 0 to 122°F / -18 to 50°C |
| Dimensions | 7.8 x 1.6 x 5.9" / 197 x 41 x 151 mm (without Antennas) |
| Weight | 1.7 lb / 777 g (without Antenna) |
Transmitter
| Transmitter Type | Handheld |
| RF Output Power | 1 / 10 mW |
| Audio I/O | None |
| Muting | None |
| Gain Range | 0 to 21 dB (3 dB Steps) |
| Frequency Response | 30 Hz to 20 kHz |
| Sync Method | IR |
| Antenna | 1 x 1/4 Wave |
| Power Requirements | Battery |
| Battery Type | 2 x AA (Included) 1 x Shure SB900A (Not Included, Replaceable) |
| Approx. Battery Life | 9 Hours (Alkaline) |
| Display & Indicators | 1 x Backlit LCD (Channel, Group, RF Output Power) |
| Housing | Aluminum |
| Dimensions | 2 x 10.1" / 51 x 256 mm |
| Weight | 12.2 oz / 347 g (without Batteries) |
Microphone
| Microphone Type | Handheld Capsule |
| Sound Field | Mono |
| Capsule | Electret Condenser |
| Polar Pattern | Supercardioid |
| Frequency Range | 50 Hz to 20 kHz |
| Maximum SPL | 140.5 dB SPL |
| Sensitivity | -52.5 dBV/Pa |
Packaging Info
| Package Weight | 9.6 lb |
| Box Dimensions (LxWxH) | 19.4 x 17.4 x 4.2" |
Shipping Notes
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- Final sale items are not eligible for returns or exchanges.
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4.3 ★★★★★
Based on 2286 reviews
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Product Reviews
★★★★★ 4
Good History Book
Format: Kindle
Twenty years that change history and the Americas. Even though the civil war ended slavery at a humongous cost, it it failed to bring social justice a d civil rights to the population of the country. It was not until 1920 that women were granted voting rights. And some problems and divisions persist nowdays.
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Reviewed in the United States on July 2, 2024
★★★★★ 5
interesting and fresh perspective on the American civil war
Format: Kindle
Fresh perspective on the well known American Civil War. I appreciate Dr Taylor’s emphasis on the preservation of slavery over the states’ rights argument for why the American Civil War was fought.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2024
★★★★★ 5
A Masterpiece by the most Influential Historian of the 20th Century
Format: Paperback
The late Edmund Morgan may very well have been the most influential American historian of the 20th century. So much of what he wrote has had a definitive impact on the field of American history that he literally stands above the rest of his peers. Few historians can claim to have changed how we view the founding of America, and Morgan is one of that very select company. In American Slavery, American Freedom Morgan managed to alter the relationship of slavery to America. While he was primarily writing about colonial Virginia, he explored the issue of slavery and illustrated how the colonial Virginians used racism to develop the form of chattel slavery that rose here in the colonies during the 17th century.
Often as we teach our history courses our students will invariably answer the question about why people came to the colonies with the statement, "People wanted to be free." Yet, we know from the records that most people who came to Virginia were anything but free. The facts are there and have always been there proving this, yet few speak about it because it conflicts with American heritage. Morgan shattered that illusion in this book. He showed that colonial Virginia was the exact opposite of freedom and that many people in the 17th century were forced to go there. In addition he showed how thousands of people died in Virginia from various causes during the first half of the century.
He also investigated the role of class in colonial Virginia and how those in power sought to use the colonial government to retain that power for themselves and similar people. At times this ran contrary to what the English monarchs wanted in their colonies, but the upper class of Virginia managed to overcome obstacles and stay in power. Morgan did this by examining the records of the colony including the laws as they were enacted. He found that many laws were designed to help those with money at the expense of those without. He also found where the laws changed and became race conscious which he interpreted as the sign that the upper class was making a clear distinction between white and black in order to create the classic Us vs. Them division. This division would be the racist wedge used to keep poor whites of the lower class from associating with the blacks of any class and to reinforce the status of slavery on all blacks.
This book won the Francis Parkman award and is regarded as an American history classic. One of the great things about Morgan was that his writing was wonderful and academic at the same time. Notes are given to the reader on each page via footnotes and reveal the great depth of research that Morgan used to develop this topic. It is a must read even today for anyone studying the history of Virginia. It is also a wonderful example of what a history book should be in its style and literary quality. Morgan's appendix does make one wonder what would have happened had he developed a quantification theory to go with his topic. The data results would probably have reinforced his conclusion. The appendix is an early use of that type of approach and shows that Morgan's conclusion would have been validated by quantification.
All in all this book is a must read for any scholar of Virginia, colonial America, or slavery. Reading it will help the student develop a deeper contextual feeling for how colonial Virginia developed and a greater understanding as to why certain things in this country came about. The theme of racism has been existent in America for centuries and Morgan showed us exactly why that was. This book is a must have in my collection and many others for its high quality of research.
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Reviewed in the United States on October 9, 2013
★★★★★ 5
Fascinating Insights into the Origins of American Racism
Format: Paperback
This is a fantastic, must read book for anyone interested in the origins of American racism. Morgan recounts the cultural, economic and political evolution of the 17th and early 18th century Virginia, and with it, makes comprehensible the reasons why racial slavery emerged as an integral component to the development of the white community's pre-revolutionary ideals of independence and liberty.
At the founding of the Jamestown colony in 1607, Virginia offered vast tracts of land available to anyone willing to make the trip and who could survive their first season (or two or three) in the New World. Unlike in England where opportunities for land ownership were constrained, the fact that Virginia land was to be had for the taking made the economic equation simple - more labor = more profits. To provide this labor, England's surplus poor (of which there was an overabundance) were sent to Virginia as indentured servants for a period of four to seven years in order to work off the costs of their relocation. Once their indenture period was over, they were free.....and poor. Over time, as established interests grabbed more and more of the land, opportunities for released bondsmen decrease, essentially creating an ever-growing class of destitute (and thoroughly despised) whites who threatened the social and political stability of the colony. Racial slavery was introduced over time to stem this proliferation of poor whites, who, after having served the term of their indenture, were free to be a "blight" on the community.
These planter elites were also constantly at political war with a succession of governors appointed by the crown to manage the affairs of the colony in a manner most beneficial to the king. By enfranchising poor whites and enlisting their support for the colonial assembly, the elites were able to exercise political power over affairs of the colony in a manner most beneficial to the colonists, rich and poor alike. The result of these forces caused a major adjustment in white social strata - the role of detested poor who would only work under the threat of the lash was imposed upon enslaved blacks, and poor whites were elevated to the level of political partners with the elites. This simultaneously endowed all whites with a fierce sense of entitlement over their political rights and the prerogatives of power on the one hand, and contempt for their black slaves on the other. Liberty and equality came to be seen as inalienable birthrights while slavery was the means by which the "shiftless, lazy, indolent" poor could be transformed from burdens on society to positive (albeit brutally coerced) contributors. In other words, Virginia whites came to think of blacks with the same sense of scorn and contempt that English aristocrats held for the poor in England while, at the same time, assuming as a birthright the same sense of political entitlement enjoyed by the elite class in England. It was this, to our modern eyes, bizarre combination of egalitarian and tyrannical ideals that informed and inspired Jefferson, Washington and Madison (among others) as they participated in the formation of what would become the United States.
The implication of this history on modern political discourse is obvious. Those who today passionately cite the liberty-loving ethos of the founding fathers while simultaneously exhibiting contempt for the poor are only looking at one side of the equation. For the Virginians, slavery and liberty went hand in hand; without the one there could not have been the other. A full, rich and nuanced understanding of our heritage compels us to recognize the human inclination to despise and exploit the powerless with the same vigor and passion that we celebrate the ennobling power of freedom.
On a final note of criticism - while the book does a masterful job of making the origins of colonial racism comprehensible, it does so at the expense of "black experience" narratives. The story addresses issues of slavery only to the extent of discussing laws passed throughout the pre-revolutionary period in order to institutionalize it and the effect these laws had on the attitudes of whites towards blacks. I started the book expecting a far deeper dive in this area, and was disappointed by how little was presented concerning the evolution of slavery throughout the 17th century from a black perspective. After having read the book, I concede that this deeper dive was not strictly necessary in order for the author to prove his thesis, yet it would have been a stronger work had greater efforts in this area been made.
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Reviewed in the United States on February 23, 2013
★★★★★ 5
Great Historical Reading
Format: Paperback
I found "American Slavery, American Freedom" to be a thought-provoking book that contained a great deal of useful information. I wrote in the margins of the book, took notes, and highlighted entire pages.
"American Slavery, American Freedom" was well-written and enjoyable to read.
I had read countless books on slavery over the years. This book did not focus primarily on slavery. A detailed description of the steps and events that led to the creation of the Commonwealth of Virginia can be found in "American Slavery, American Freedom."
The history of Virginia is characterized by slavery and servitude. Since many of the books I had read on slavery lacked a compelling backstory, I found this book refreshing.
As far as I can tell, the author denied or downplayed the fact that Thomas Jefferson fathered many children with a slave named Sally Hemmings. The author probably worked on this book for years before its publication in 1975. There was a possibility that Edmund Morgan did not want to write about any "touchy" topics.
"American Slavery, American Freedom" was a pleasure to read. I would recommend it to others.
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Reviewed in the United States on September 30, 2020
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