Sennheiser SpeechLine Digital Wireless

SpeechLine Digital Wireless is a digital wireless microphone system for speeches and lectures and operates in the license-free 1.9 GHz frequency band. It is optimized for use in universities and companies. Thanks to its broad product portfolio, the system is particularly versatile and can be used for presentations, lectures, in conference rooms or for panel discussions. Digital workflows facilitate the daily work of IT and AV managers. Smooth setup and maintenance is made possible by the system via Sennheiser Control Cockpit software or media control.

Thanks to IT integration, the SpeechLine Multi-Channel Receivers is the ideal addition to your campus or corporate network. With the most common IT standards and numerous connectivity options, including two Ethernet ports with support for Power over Ethernet (PoE) and Dante, the receiver integrates smoothly into the existing infrastructure. Plug-ins and protocols also enable integration of third-party infrastructure.

Key features:

• Automatic frequency and fault managemen
• Remote control & troubleshooting via Control Cockpit or a media controller
• Excellent battery management with a battery life of 15 hours
• Optimal speech intelligibility through speech-optimized microphone capsules and automatic audio level adjustmen
• Multi-room mode: automatic adjustment of transmission power to room siz
• Dante integration

System components

• System Type: Digital wireless microphone system optimized for speech and lecture applications.
• Transmitters: SL Handheld DW (handheld), SL Bodypack DW (bodypack), SL Tablestand DW, SL Boundary DW (various configurations available).
• Receivers: SL Rack Receiver DW (rack-mountable), SpeechLine Multi-Channel Receiver (wall/ceiling mountable).
• Microphone Options: Speech-optimized condenser microphone capsules (e.g., MME 865-1, MKE 1, SL Headmic 1, gooseneck, boundary).

Wireless transmission

• Frequency Band: License-free 1.9 GHz (specific ranges vary by region: e.g., EU: 1880-1900 MHz, USA: 1920-1930 MHz).
• Modulation: GFSK with back channel
• Transmission Method: TDMA, Space Diversity
• Latency: 19 ms
• RF Output Power: Adaptive, up to 250 mW (country-specific)
• Encryption: AES 256-bit

Audio

• AF Frequency Response (System): 20 to 20,000 Hz
• Audio Sampling: 24 bit/48 kHz
• Dynamic Range: > 120 dB(A)
• THD (1 kHz): typ. 0.1 %
• Signal-to-Noise Ratio: > 90 dB(A)
• Receiver Audio Outputs: Balanced XLR (max. +18 dBu), Unbalanced RCA (max. +6 dBu)
• Audio Effects (Receiver): Low cut (-3 dB at 120 Hz), 7-band graphic equalizer with sound presets (e.g., female voice, male voice, instrument/media)

Power & Battery

• Transmitter Power Supply: Rechargeable Lithium-Ion accupacks (e.g., BA 10, BA 30, BA 40) or 2 x AA batteries (optional accessory).
• Transmitter Operating Time: Up to 15 hours (with accupack, typical).
• Receiver Power Supply: 12 V DC (via external power supply unit) or PoE (Power over Ethernet) for Multi-Channel Receiver.
• Charging Options: Network-enabled multi-device chargers (e.g., CHG 2N, CHG 4N), wireless charging (CHG 2W for tablestand), USB charging.

Network & IT Integration

• Network Protocols: Media Control Protocol, TCP/IP IPv4 (DHCP, manual)/IPv6, mDNS (switchable).
• Interfaces: RJ-45 for Ethernet connectivity (including Dante™ digital audio network sockets on Multi-Channel Receiver), XLR, RCA, reverse SMA (antenna).
• Device Management: Remote control and monitoring via Sennheiser Control Cockpit software or media control systems (e.g., AMX, Crestron).
• Automatic Features: Automatic frequency and interference management, automatic microphone sensitivity adjustment, automatic audio level management.

Physical & Environmental

• SL Rack Receiver DW Dimensions: Approx. 168 x 212 x 43 mm (6.61" x 8.35" x 1.69")
• SL Rack Receiver DW Weight: Approx. 828 g (1.83 lbs)
• Multi-Channel Receiver Dimensions: 180 x 180 x 45 mm (7.08" x 7.08 " x 1.77") (incl. wall mount adapter)
• Operating Temperature: -10 °C to +55 °C (14 °F to 131 °F) for system, specific components may vary.
• Relative Air Humidity: max. 95 % (non-condensing)