FAQ

• What kind of transmitters are available?

  • For the SpeechLine Digital Wireless Series there are 5 transmitters available:
    - SL Handheld DW
    - SL Bodypack DW
    - SL Tablestand 133-S DW (with 3 pin XLR for gooseneck mics)
    - SL Tablestand 153-S DW (with 5 pin XLR gooseneck mics)
    - SL Boundary 114-S DW

• How many microphones can be used in one room?

  • Depending on the regional regulations it is possible to get up to 20 microphones in one room. With the Multi-room option the channel number can be increased.

• I want to use SpeechLine in several rooms, how can I increase the number of microphones?

  • For this case SpeechLine Digital Wireless offers the possibility to adjust the transmitting power. By selecting the corresponding room size it is possible to get as many mircophones in your building as needed. To get the right and secure value the "Walk Test" can support you.

    More information can be found here

• Which RF frequency range is used in SpeechLine Digital Wireless?

  • SpeechLine Digital Wireless is using DECT range, which is well known from telephone market. Due to this fact the use of SpeechLine Digital Wireless is future proved and license free.

• Do I need a license to use SpeechLine Digital Wireless?

  • No, the 1G9 DECT range is license free.

• How big is the latency?

  • The latency of SpeechLine is 19 ms, which is an applicable value for speech.

• How do I connect my transmitter and receiver?

  • To conncet a transmitter to a receiver you have to press and hold the pair button on each device until the LED starts to blink red and green.

• Which audio outputs do I have?

  • To make the audio connection as easy and flexible as possible we provide XLR, TRS and phone jack as audio outputs.

• Which batteries can I use?

  • The transmitter have an lithium ion battery in the delivery with which a transmitter can work up to 18h (depending on the device). In addition it is possible to use non- rechargeable AA batteries in the handheld and bodypack. For this the B10 or B30 tray is needed.

• How can I use more than two receivers?

  • For the case that more than two receivers are needed please use the AWM 2 or 4 together with our combiner SL PASC 2 or SL PASC 4.

• What kind of antennas are avaiable?

  • As remote antenna the AWM 2 and AMW 4 is recommended. You can use one receiver with the AWM 2 and two receivers with the AWM 4. Together with a combiner the number of receivers can be increased. In any case additional cables are needed.

• How do I charge the transmitters?

  • We are offering 3 different chargers:
    - CHG 2 a two bay charger for handheld and bodypack
    - CHG 4N a four bay network charger for handheld and bodypack
    - CHG 2W a two bay inductive charger for tablestand and boundary.
    In addition the battery BA 10 (handheld) and BA 30 (body pack) can be charged via USB.

• Is there a possibility to monitor SpeechLine Digital Wireless?

  • With the Sennheiser Control Cockpit the receiver and the CHG 4N can be monitored and controlled remotely.

• Does the receiver support DHCP?

  • Yes, the receiver supports DHCP, Automatic IP and fixed IP. The Network mode can be adjusted in the receivers menu.

• Which headsets and lavaliers can be used with SL Bodypack DW?

  • You can use any headset or lavalier from Sennheiser. We recommend to use the SL Headmic 1 or MKE 1.

• How do I make a firmware update?

  • The firmware update is done via the Sennheiser Control Cockpit Software. As soon as a receiver has been upgraded to a new firmware the update of the portable transmitter will be done automatically when paired. In addition a transmitter can be upgraded via the Sennheiser Control Cockpit Software and the the CHG 4N.

• What is the difference between Master and Follower receiver?

  • To get the maximum number of microphones it is necessary to synchronize them with eachother. Therefore a master is needed, which controls all other microphones (follower).
    Please follow these steps below to ensure a valid Master / Follower configuration for your system:
    
    - Prepare and connect the antennas (if needed with AMW 4 and combiner)
    - switch on one receiver and pair a transmitter. Wait until the LED at the receiver turns to green. These microphone will become the Master.
    - Switch on all other receivers, while the Master receiver is still on. All other microphones will become a follower automatically.
    
    IMPORTANT: As soon as the Master / Follower configuration has been done all receivers have to be switched on at the same time e.g. via a power strip.
    

• Do I have any kind of security feature?

  • Yes, the connection of a transmitter to the receiver is always AES 256 encrypted.

• What kind of antenna cables do I use?

  • SpeechLine Digital Wireless is using Reverse-SMA connectors due to regulatory reasons. Sennheiser is offering RG-58 antenna cables in 1m, 5m 10m and 20m. A length higher than 20m is not recommended because the cable attenuation will be too high.

• Does SpeechLine Digital Wireless supports Media Control systems?

  • Yes, SpeechLine Digital Wireless is using the Sennheiser Sound Protocol, which can be used for programming a media control system. Furthermore, Plug-Ins for Crestron and QSC are available.

• What does "automatic Gain" mean?

  • SpeechLine Digital Wireless adjusts the sensitivity at the microphone automatically to the most convenient level. That means you don't have to take care about gain anymore.

• How do I set up the IP address of a receiver?

  • The IP address can be set manually or automatically via DHCP. Furthermore, IPv6 and mDNS is supported.