Meet the new Canon EOS R5 MK II 8K MIrrorless Camera Learn More!

Financial Options Available
  • Affirm
  • Paypal Credit
Learn More
Requesting a Quote?
Looking for better pricing for an item? Create a new company account now togain access to quoting, quick ordering, and more. Learn more details here.
See an issue on this page? Let us know.

Lectrosonics DSR4 Four-Channel Digital Slot Receiver (A1B1: 470 to 614 MHz)

0 reviews
Questions about this product?
  • Mobile Production, Sports, Reality TV
  • For Camera Slots and Bag/Cart Systems
  • Four Independent Channels/Compact Design
  • Vector and Antenna Diversity Modes
  • 144 MHz Wideband Tuning Range
  • AES3 or Analog Mic-/Line-Level Outputs
  • TA5 Male Connector on Faceplate
  • All-Aluminum Housing for Durability
  • Backward-Compatible with Digital Hybrid
  • Secure AES 256-CTR Encryption

The Lectrosonics DSR4 Four-Channel Digital Slot Receiver (A1B1: 470 to 614 MHz) is a lightweight quad-channel digital slot receiver engineered for mobile sound production, sports video, reality TV, and anywhere a wireless system must provide mission-critical signal stability and clear, transparent 24-bit / 48 kHz sound. Lectrosonics DSR4 Four-Channel Digital Slot Receiver is compatible with the company's mono digital transmitters (DBSM, DBu, DHu, DPR, DPR-A) and stereo digital transmitters (DCHT, M2T), and backward-compatible with any Digital Hybrid Wireless transmitter.

The DSR4 provides four independent receiver channels at the highest level of RF and audio performance available, a versatile, field-proven feature set, selectable AES3 or analog mic-/line-level outputs, and next-generation capabilities in the Unislot/Superslot form factor for ENG, field, and location production. Settings can be made from the front panel with tactile buttons and a color LCD interface, making the unit ideal for use in portable bag systems, mounted in or on cameras, and on sound carts. The built-in RF spectrum analyzer and SmartTune function help you quickly find a clean frequency to alleviate interference problems in an increasingly congested RF spectrum.

Built for the Rigors of the Field

  • The mechanical design of the DSR4 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 packs four channel receivers in one unit powered by external DC.
  • The 2-way IR sync makes quick work of setting up matching transmitters
  • There is a built-in TA5 male connector on the faceplate for use with cameras or other docks not offering analog audio channels through the slot connector—channels 3 and 4, external audio outputs
  • The machined aluminum housing and panels are surfaced with a hard-anodized finish with laser etched markings to withstand the rigors of field production.

Two Diversity Modes for Mission-Critical Wireless

  • For versatility, the DSR4 offers both antenna Phase Switching diversity (4-channel operation) or Vector diversity (2-channel operation).
  • 4-channel operation: each channel combines signals from both antennas in or out of phase, depending on field strength at each antenna and which combination yields the best results.
  • 2-channel operation: receivers can be paired for Vector diversity mode. The Vector subsystem smoothly and continuously combines RF signals from both channels, with differing phase angles in order to obtain maximum energy.
  • It is possible to have one Vector pair (say, channels 1 & 2) and two independent antenna phase channels (say, 3 & 4) for a total of 3 channels of independent operation.
  • The two RF gain stages in the front end of each channel provide low-noise RF amplification, excellent sensitivity, and extremely low susceptibility to intermodulation and desensitization.

High IP3 Performance for Tough RF Environments

  • The DSR4 offers one of the highest Third-Order (IP3) performances at +15 dBm, compared with +5 to +8 dBm provided by typical audio RF receivers. High IP3 performance allows the receiver to better eliminate the negative impact caused by third-order intermodulation artifacts, have a better signal-to-noise ratio, and also more reliably in today's tough RF environments.

Finding Clear Frequencies with SmartTune

  • SmartTune is the easiest and fastest way to scan the local RF spectrum and find clear operating frequencies. The receiver scans through its tuning bandwidth and automatically finds empty areas within the tuning range that have little or no RF energy. The receiver will then set itself to a frequency within an empty area and prompt you to continue or use the IR function to sync to a transmitter

SmartNR Noise Reduction

  • With a noise floor at -120 dBV and a frequency response up to 20 kHz, high-frequency noise in the source audio is more apparent than in conventional wireless systems. The SmartNR algorithm has three modes. When Off, no noise reduction is performed. When Normal is selected, enough noise reduction is applied to remove most of the hiss from the mic preamp and some of the hiss from lavalier microphones. When Full is selected, enough noise reduction is applied to remove most of the hiss from nearly any signal source of reasonable quality, assuming levels are set correctly at the transmitter.


  • The DCR4 offers compatibility with the D-Squared and Duet digital transmitters, including the DBu, DHu, DPr, DCHT, DBSM, and M2T.
  • There is backward compatibility with any Digital Hybrid wireless transmitters including the SM and SMWB series, WM, HM Series, MM400 Series, HHSeries, LT, LMb, UM400 Series, and SSM.

Other Features

  • Tune across 144 MHz
  • Four independent receiver channels
  • Unislot/Superslot form factor 
  • Antenna phase switching and Vector diversity modes
  • Two RF front ends per audio channel
  • Fast RF scanning and setup via IR
  • 24-bit /48 kHz digital audio
  • Selectable AES3 or analog mic-/line-level outputs
  • Built-in TA5M connector on faceplate for channels 3 & 4 external audio outputs
  • Built-in RF spectrum analyzer
  • SmartTune for quick auto frequency selection and 2-way IR sync for fast setup
  • High Third-Order Intercept (IP3) performance of +15 dBm
  • Built-in 1 kHz audio test tone
  • Powerful AES 256-CTR mode encryption, with four different encryption key policies including Universal, Shared (great for sports coverage), Standard, and Volatile (one-time use key).
  • LCD display provides visibility in all lighting conditions
  • USB jack and data connection through the SuperSlot interface for compatibility with Lectrosonics Wireless Designer frequency coordination and system management software
  • Machined aluminum housing with hard-anodized finish
  • Proprietary accessories are required for mounting, powering, and audio outputs: DSR4EXT, DSR4SUPER, DSR4SNY, DSR4BATTSLEDTOP, and DSR4BATTSLEDBOTTOM
In the Box
  • Lectrosonics DSR4 Four-Channel Digital Slot Receiver (A1B1: 470 to 614 MHz)
  • 2 x AMJ-19 Jointed SMA Antenna
  • 2 x AMJ-22 Jointed SMA Antenna
  • Limited 1-Year Warranty
Lectrosonics Logo
View Page
More Information
Product ConditonNew
Wireless Technology Digital UHF
Diversity Antenna Phase Switching, Vector Diversity
RF Frequency Band 470.1 to 614.375 MHz
RF Bandwidth 144 MHz
Frequency Step Size 25 kHz
RF Channel Scanning Auto-Scan
Control App Support No
Latency 1.4 to 2.9 ms
SNR ≤113 dB
THD <0.2 %


Receiver Type Slot-Mount (Bag Suitable)
Mounting Options Slot-Mount (with Optional Hardware)
Antenna 2 x Flexible Whip, SMA (Top-Mount)
Number of Audio Channels 4
Audio I/O 1 x TA5/Mini XLR 5-Pin Male Balanced Mic/Line Output
Slot-Mount I/O Adapters Available Separately: DB-25 (Uni/SuperSlot), DE-15/DB-15 (Sony Type), TA5/Mini XLR
Frequency Response 25 Hz to 20 kHz
Network I/O None
Word Clock I/O None
USB/Lightning Connectivity Micro-USB Female (Firmware Update)
Standalone Audio Interface Capable No
Impedance Antenna: 50 Ohms
Approximate RF Sensitivity -108 dBm / 0.9 µV
Adjacent Channel Isolation >60 dB
Spurious Rejection: 85 dB
Power Requirements DC Input
DC Input Power 9 to 17 VDC at 170mA
Display & Indicators 1 x Backlit LCD (AF Level, Menu Navigation, RF Level, Transmitter Battery Status)
Housing Aluminum
Dimensions 3.2 x 1.2 x 5.5" / 8.1 x 3 x 14 cm
Weight 14.4 oz / 408 g (without Mounting Hardware)
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to
Copyright © 2024 Filmtools, a Magnasync/Moviola Company.