Product Highlights
  • Lavalier Microphone
  • Omnidirectional Pickup Pattern
  • 1/8" Connection
  • Wireless
  • Includes Microphone, Transmitter & Receiver
Sennheiser SpeechLine Digital Wireless SL Lavalier Set DW-4-US R Wireless Mic System w/ Rackmount Kit Sennheiser SpeechLine Digital Wireless SL...
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Sennheisers smallest lavalier microphone set optimized for speeches and lectures.

  • The set includes the bodypack transmitter, stationary receiver and everything to use or install. 

It comes wiht the MKE 1 condensor lavalier microphone – so not just A lavalier mic, but the best and most unobstrusive one for great presentations with best speech clarity.

All sets also come with rechargeable accupacks with up to 15 hrs of operating time. The accupack is also USB rechargeable, the cable is in the box, the USB socket is presumably just a step away from you.

The two types of sets are either Rackmount Sets (-R version), which come with everything needed for rack mounting, or Case Sets (-C version), in a transport case – without rackmounts, if you do not want to install the receiver.

Key Features:

  • Automatic frequency and interference management
  • Excellent speech intelligibility
  • Full, natural sound with low ambient noise
  • Automatic frequency and interference management
  • Lockable 3.5 mm jack socket
  • Secure 256 bit AES encryption

What's Included

SL Bodypack DW
SL Rack Receiver DW
BA 30 rechargable battery
Case or GA 4 Rackmount Kit and Pouch


Product Specifications


Frequency response 20 to 20,000 Hz 
THD, total harmonic distortion typ. 0.1 % 
Transducer principle Condensor 
Power consumption 350 mA 
Pick-up pattern omni-directional 
Nominal impedance 1 kΩ 
Signal-to-noise ratio > 90 dB(A) 
Equivalent noise level 27 dB 
Maximum sound pressure level (passiv) 143 dB 
RF output power adaptive, up to 250 mW (country-specific) 
Power supply 12 V DC 
Antenna connector 2 x reverse SMA 
Current consumption approx. 240 μA 
Audio output level (balanced) max. -18 dBu, typ. -24 dBu 
Audio output level (unbalanced) max. +6 dBu 
Dynamic range > 120 dB(A) 
Operating voltage (stand alone) 4,5 - 15 V 
RF sensitivity < -90 dBm 
Sensitivity in free field 5 mV/Pa ± 2.5 dB (at 1 kHz) 
Sampling rates 24 bit/48 kHz
Connection Audio Out: XLR 3M Audio Out: 2 x RCA Network: RJ 45 

Questions & Answers

Sennheiser SpeechLine Digital Wireless SL Lavalier Set DW-4-US R Wireless Mic System w/ Rackmount Kit

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