The Shure GLXD14R+UK/SM31-Z4 is the Z4 band variant of the Shure GLX-D+ dual-band digital wireless system. The system ships with a GLXD4R+ half-rack single-channel digital receiver with front-panel SB904 charging bay, bodypack transmitter and a Shure SM31FH cardioid condenser fitness headset. It is intended for fitness instructors, presenters, theatre, houses of worship and education.
Licensing
The Z4 variant operates in the 2.4 GHz and 5.8 GHz licence-exempt ISM bands, so no Ofcom PMSE licence is required for use in the UK.
Key Features
✓Dual-band digital operation across the 2.4 GHz and 5.8 GHz licence-exempt ISM bands
✓24-bit digital audio with a 20 Hz to 20 kHz frequency response
✓Automatic frequency management with seamless channel switching if interference appears
✓Up to 11 active GLX-D+ channels per environment with the optional GLXD+FM frequency manager (four without)
✓Up to 100 ft (30 m) indoor and 65 ft (20 m) outdoor typical working range
✓Shure SB904 rechargeable lithium-ion transmitter battery
✓Up to 17 hours of runtime at 2.4 GHz and 12 hours at 5.8 GHz on a full charge
✓15-minute quick charge for approximately 1.5 hours of runtime
✓Half-rack 1U metal chassis with detachable dual-band dipole antennas
✓Front-panel SB904 battery charging bay built into the receiver
✓Balanced XLR and balanced 1/4-inch TRS outputs with mic/line pad
✓GLXD1+ bodypack transmitter with TA4F (TQG) input connector
Specifications
| Brand | Shure |
| Model | GLXD14R+UK/SM31-Z4 |
| System family | GLX-D+ Dual Band Digital Wireless |
| Band | Z4 (2.4 GHz and 5.8 GHz ISM) |
| Transmission | 24-bit digital, dual-band 2.4 GHz and 5.8 GHz |
| Audio frequency response | 20 Hz to 20 kHz |
| Working range | 30 m (100 ft) indoor, 20 m (65 ft) outdoor typical |
| Max simultaneous channels | Up to 11 with GLXD+FM frequency manager (4 without) |
| Transmitter battery | Shure SB904 rechargeable lithium-ion |
| Battery runtime | Up to 17 hours at 2.4 GHz / 12 hours at 5.8 GHz |
| Receiver | GLXD4R+ half-rack single-channel, detachable dual-band dipole antennas |
| Receiver outputs | Balanced XLR and balanced 1/4-inch TRS, mic/line switchable |
| Receiver charging | Front-panel SB904 charging bay |
| Transmitter | GLXD1+ bodypack, TA4F (TQG) input |
| Microphone | Shure SM31FH cardioid condenser fitness headset |











