Wireless microphones
Shure BLX vs Shure GLXD+
Quick answer
These are different risk profiles, not better and worse. BLX at $389.00 reaches 300 feet but depends on television spectrum nobody at your church controls. GLXD+ at $659.00 manages its own frequencies but reaches 100 feet and shares the band with your Wi-Fi.
Shure BLX24/SM58 Wireless Microphone System - 14-Hour Battery Life, 300 ft Range, UHF
$389.00 Specs and sizingAnalog UHF in the 470 to 608 MHz working band, 300 feet of range, 14 hours on two AA cells, up to twelve compatible systems per band.
Best for: Worship vocals and a roaming handheld in a 100 to 500 seat room
Check price on Amazon
Shure GLXD24+/SM58 Digital Wireless Vocal System - Z3 Band
$659.00 Specs and sizingDual band 2.4 and 5.8 GHz with automatic frequency management and a rechargeable battery, so there is no UHF coordination to do at all.
Best for: Small rooms with no volunteer willing to coordinate UHF frequencies
Check price on AmazonAsk one question: who controls the radio environment in your building? If the answer is nobody, buy the GLXD+, because it hunts for clear spectrum on its own and the church down the road putting a television station on the air cannot take your band away. If the answer is a competent volunteer who administers the Wi-Fi, buy the BLX, because the extra 200 feet of range and the 14 hour AA battery are real and the crowding is manageable.
A 2.4 GHz system is not a cheaper UHF system. It costs $659.00 against $389.00, so it is the more expensive of the two, and what you are buying is a different set of things that can go wrong. Understand both lists before choosing. The bands themselves are covered at 470 to 608 MHz and 2.4 GHz.
Side by side
| Model | Price | Frequency band | Transmitter type | Microphone type | Polar pattern | Rated range | Battery life |
|---|---|---|---|---|---|---|---|
| Shure BLX24/SM58 Wireless Microphone System - 14-Hour Battery Life, 300 ft Range, UHF | $389.00 | UHF | Handheld | Dynamic | Cardioid | 300 ft | 14 hours |
| Shure GLXD24+/SM58 Digital Wireless Vocal System - Z3 Band | $659.00 | 2.4 GHz and 5.8 GHz | Handheld | Dynamic | Cardioid | 100 ft | 12 hours |
Where each system fails, and who in your church can fix it
This is the comparison that matters and almost nobody publishes it. Both systems work perfectly on a good day. Plan for the bad one.
A BLX system fails because of something outside the building and nobody at the church can fix it; a GLXD+ system fails because of something inside the building, which is the failure you can actually control.
| What happens | BLX in UHF | GLXD+ in 2.4 and 5.8 GHz | Who can fix it |
|---|---|---|---|
| A television station changes channel | Retune, or lose usable frequencies | Unaffected | Nobody at the church |
| The building adds Wi-Fi access points | Unaffected | Crowding and possible dropouts | Your network volunteer |
| A visiting act brings its own wireless | Coordinate by hand before the service | Handled automatically | The sound volunteer |
| Someone needs 200 feet of range | Fine to about 300 feet | Marginal past 100 feet | Nobody |
| A future spectrum auction | It has happened once already | Not applicable, unlicensed band | Nobody |
| A flat battery ten minutes before the service | Two AA cells from the drawer | A rechargeable pack that needs the dock | The rota |
Range figures are the manufacturer published line-of-sight numbers, 300 feet for BLX and 100 feet for GLXD+. Real range through a masonry wall or a metal-framed platform set is shorter for both, and shorter by more at 2.4 GHz.
Choose BLX for range, batteries and spare parts
A sanctuary where the preacher walks to the back of the room, a church with an overflow space down a corridor, or an outdoor service in the car park all need range that 100 feet does not provide. UHF at 300 feet also penetrates walls and bodies better than 2.4 GHz does, which is why the signal survives a pastor turning their back to the receiver.
The AA battery is the other honest argument, and it matters more in a volunteer church than any specification. A dead transmitter is fixed in ten seconds by anyone who can find the drawer. A rechargeable system that nobody docked is fixed by finding a cable and waiting. If your team changes every week, alkaline cells are a feature. Our battery budget calculator prices the yearly cost so you can make that trade with a number.
The cost is coordination work. Somebody has to scan, assign frequencies, write them down and check them when a guest arrives with their own system. That job never goes away, and the coordination guide is the shortest route to doing it properly.
Choose GLXD+ when nobody will do the coordination work
The honest case for 2.4 GHz is organisational, not technical. If there is no volunteer who will scan for frequencies, no written frequency list, and nobody who knows what an intermodulation product is, an automatically managed system will outperform a better system that nobody sets up correctly. GLXD+ scans both 2.4 and 5.8 GHz, moves itself when it finds interference, and the transmitter follows the receiver.
It also removes the legal question entirely. Unlicensed spectrum cannot be auctioned out from under you, which is exactly what happened to churches holding perfectly good 600 MHz systems. See how the repack affected churches for what that cost.
The condition attached to this recommendation is firm: somebody must control the building Wi-Fi. If the church network runs on consumer access points that sit on 2.4 GHz at full width, or if the youth room has its own router, the microphones are competing with them. Moving the church Wi-Fi to 5 GHz channels and keeping access points away from the platform is not optional with this system, it is part of the installation. The Audio-Technica ATW-1102 at $349.95 is the cheaper way into the same band if budget is the constraint.
Sources
- Shure published BLX series specifications
- Shure published GLX-D+ dual band specifications
- FCC Part 15 unlicensed operation in the 2.4 GHz and 5.8 GHz bands
Frequently asked questions
Will a 2.4 GHz microphone break our church Wi-Fi?
Not break it, but they will compete. A GLXD+ transmitter and a Wi-Fi access point in the same room are both using the same unlicensed band, and whichever is closer wins. The practical fix is to run the church network on 5 GHz for everything that matters, keep access points off the platform, and avoid 40 MHz wide channels on 2.4 GHz.
Is 100 feet of range really enough for a church?
For most rooms, yes. A 250 seat sanctuary is rarely more than 80 feet from platform to back wall, and the receiver antenna can sit in the room rather than in a closed rack. It is not enough for a foyer, an overflow room, a car park service or a building where the receiver lives in a metal rack behind a wall.
Does GLXD+ need a licence?
No. The 2.4 GHz and 5.8 GHz bands are unlicensed, so there is no licence question at any power level a microphone uses. UHF systems under 50 mW also operate without an individual licence for most churches, but they operate on a secondary basis, meaning a licensed television broadcaster always has priority over you.
Which one holds up better with a guest speaker or a visiting band?
GLXD+, comfortably. A visiting act arriving with four of their own UHF transmitters is the single most common cause of a wireless failure in a church service, because nobody coordinated them against yours. A self-managing 2.4 GHz system simply moves. If you stay on UHF, ask visiting acts for their frequencies before they arrive.
Can I run both bands from the same mixer?
Yes. Both output balanced audio on XLR into any console input, and nothing about the band affects the channel strip. Keep the receivers physically apart so their antennas are not stacked, label the frequency on the front of each receiver, and record the whole plan on an input list your volunteers can read.
Researched, not professional advice. This page is compiled from published manufacturer specifications, operator manuals, FCC rules, published standards and owner-review consensus, not hands-on testing. Sound system design, rigging loudspeakers overhead, and any electrical work are jobs for a qualified professional: have flown loudspeakers and their attachment points signed off by a structural engineer or a certified rigger, and have all wiring done by a licensed electrician to your local code. Wireless microphone rules change, so confirm the current FCC position before buying. As an Amazon Associate we earn from qualifying purchases.