Skip to main content
Lectrosonics DSR4  Four Channel Digital Slot Receiver Band 941
MPN: DSR4-941
  • Two diversity options for maximum flexibility
  • 24 bit/48 kHz digital for flawless audio
  • AES 256-bit, CTR mode encryption, with 4 different key policies available
  • High IP3 performance of +15 dBm for tough RF environments
  • Analog and AES3 digital audio outputs
  • External DC powering options and USB input for firmware updates and data transfer

Call for Availability



Lectrosonics DSR4  Four Channel Digital Slot Receiver Band 941 covers Frequency 941.525 - 959.825

The DSR4 digital receiver provides the highest level of RF and audio performance available with a versatile feature set in a compact design for field and location production. Settings can be made from the front panel with tactile buttons and color LCD interface, making the unit ideal for use in portable bag systems and on sound carts. An RF spectrum analyzer and SmartTune are built into the
receiver to alleviate interference problems in an increasingly congested RF spectrum.

The mechanical design of the receiver fits into the Super-Slot ecosystem and combines field-proven features developed over many years of experience in motion picture and television production. To decrease weight, the DSR4 provides a four channel receiver in one unit powered by external DC. The receiver is also equipped with an IR port for data transfer between units. The machined aluminum housing and panels are surfaced with a hardanodized finish with laser etched markings to withstand
the rigors of field production.

The RF gain stages in the front end use a newly developed design to provide low noise RF amplification, excellent sensitivity and extremely low susceptibility to intermodulation and de-sensitization.

Product Specification
Wireless TechnologyDigital UHF
DiversityAntenna Phase Switching, Vector Diversity
RF Frequency Band941.525 to 959.825 MHz
RF Bandwidth18 MHz
Frequency Step Size25 kHz
RF Channel ScanningAuto-Scan
Control App SupportNo
Latency1.4 to 2.9 ms
SNR≤113 dB
THD<0.2 %


Receiver TypeSlot-Mount (Bag Suitable)
Mounting OptionsSlot-Mount (with Optional Hardware)
Antenna2 x Flexible Whip, SMA (Top-Mount)
Number of Audio Channels4
Audio I/O1 x TA5/Mini XLR 5-Pin Male Balanced Mic/Line Output
Slot-Mount I/O AdaptersAvailable Separately:
DB-25 (Uni/SuperSlot), DE-15/DB-15 (Sony Type), TA5/Mini XLR
Frequency Response25 Hz to 20 kHz
Network I/ONone
Word Clock I/ONone
USB/Lightning ConnectivityMicro-USB Female (Firmware Update)
Standalone Audio Interface CapableNo
50 Ohms
Approximate RF Sensitivity-108 dBm / 0.9 µV
Adjacent Channel Isolation>60 dB
SpuriousRejection: 85 dB
Power RequirementsDC Input
DC Input Power9 to 17 VDC at 170mA
Display & Indicators1 x Backlit LCD (AF Level, Menu Navigation, RF Level, Transmitter Battery Status)
Dimensions3.2 x 1.2 x 5.5" / 8.1 x 3 x 14 cm
Weight14.4 oz / 408 g (without Mounting Hardwar

Lectrosonics DSR4  Technical Data