This is what Shure say about the SLXD Beta 58A Radio Mic System:
Shure SLXD24/B58 Digital Handheld Wireless Vocal System with Beta58A Microphone
The new SLX-D series from Shure delivers transparent, 24-bit digital audio and rock solid RF performance in an easy-to-use, easy-to-scale suite of versatile system configurations. Operate up to 32 compatible systems per 44 MHz UHF band, with easy setup and optional rechargeability accessories.
The Shure SLXD24/B58 Digital Handheld Wireless Vocal System is an incredible handheld digital wireless vocal mic system that's tough enough for life on the road, featuring Shure's industry-leading Beat58A microphone capsule for rich, detailed sound and superior off-axis rejection of unwanted noise.
SLXD4 Digital Wireless Receiver Specifications:
- Dimensions (H × W × D): 1.65 × 7.76 × 5.98 in (42 × 197 × 152 mm)
- Weight: 1.8 lb (816 g) without antennas
- Housing: Galvanized Steel
- Power Requirements: 15 VDC @ 600 mA Supplied by external power supply (tip positive)
- RF INPUT
- Spurious Rejection: >75 dB Typical
- Connector Type: BNC
- Impedance: 50 Ω
- AUDIO OUTPUT
- Gain Adjustment Range: –18 to +42 dB in 1 dB steps
- Configuration
- 1/4" (6.35 mm): Balanced (Tip=audio +, Ring=audio –, Sleeve=ground)
- XLR: Balanced (1=ground, 2=audio +, 3=audio –)
- Impedance
- 1/4" (6.35 mm): 1.3 kΩ (670 Ω Unbalanced)
- XLR (line): 400 Ω (200 Ω Unbalanced)
- XLR (mic): 150 Ω
- Full Scale Output
- 1/4" (6.35 mm): +15 dBV differentially (+9 dBV single)
- XLR (LINE setting): +15 dBV
- XLR (MIC setting): –15 dBV
- Mic/Line Switch 30 dB pad
- Phantom Power Protection
- 1/4" (6.35 mm): Yes
- XLR: Yes
- NETWORKING
- Network Interface: Single Port Ethernet 10/100 Mbps
- Network Addressing Capability: DHCP or Manual IP address
- Maximum Cable Length: 100 m (328 ft)
SLXD2 Handheld Digital Wireless Transmitter Specifications:
- Battery Type: Rechargeable Li-Ion or 1.5 V AA batteries
- Dimensions (Dia. × L): 1.46 × 6.93 in (37.1 × 176 mm)
- Weight: 5.2 oz. (147 g)
- Housing: Aluminum
- AUDIO INPUT
- Configuration: Unbalanced
- Maximum Input Level: 8.2 dBV (2.57 Vrms, 7.27 Vpp) - dependent on microphone type
- RF OUTPUT
- Antenna Type: Integrated Single-Band Helical
- Occupied Bandwidth: <200 kHz
- Modulation Type: Shure Propietary Digital
- Power: 1 mW/10 mW
Beta58A Microphone Specifications:
- Cartridge Type: Dynamic (moving coil)
- Frequency Response: 50 to 16,000 Hz
- Polar Pattern: Supercardioid
- Output Impedance: 150 Ω
- Sensitivity (at 1kHz, open circuit voltage): −51 dBV/Pa (2.8 m
