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.

5 Short “deep dive” videos on key features and functions in the DSR4 receiver

Features, capabilities, and how-tos in these videos include independent tuning ranges and compat modes, RF spectrum scanning, manual tuning, Smarttune auto frequency selection, and tuning groups with names and compat modes, known as “Party Dialing.”

Click play to start the playlist

Accessories

Features

• Three 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
• Full integration with Sound Devices 8-Series mixer/recorders with v1.09 firmware and 8-Series v9.30
• Four independent channels, compact design
• Two diversity options for maximum flexibility
• External DC powering options and USB input for firmware updates and Wireless Designer connectivity

Compatibility

The DSR4 offers compatibility with the D-Squared and Duet digital transmitters, including the DBu, DHu, DPR, DPR-A, DBSM, DCHT, and M2T, and backward compatibility with any Digital Hybrid Wireless® transmitters including the SM and SMWB series, WM, HM Series, MM400 Series, HH Series, LT, LMb, UM400 Series, and SSM.

SmartNR™

With a noise floor at -120 dBV and a frequency response to 20 kHz, high frequency noise in the source audio is more apparent than in conventional wireless systems. The Smart NR algorithm has three mode. 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 lavaliere 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.

Diversity Options

An ideal diversity system constructively combines all the energy available at both antennas. The DSR4 offers two diversity options: for 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. For 2-channel operation, receivers can be paired for Vector Diversity operation. The Vector subsystem smoothly and continuously combines RF signals from both channels, with differing phase angles in order to obtain maximum energy. The four receivers in the DSR4 can be use separately or combined in pairs.

Specifications

• External Power: Minimum 7 VDC to maximum 17 VDC
• Model A1B1: 470.100 - 614.375 max current 420mA at 9 VDC.
• Model B1C1: 537.600 - 691.175
• Operating Temp. Range: -20 to 50°C; -5 to 122°F
• Weight: 408 grams (14.4 oz.) w/o audio adapter
• Dimensions: 3.23” wide x 1.23” high x 5.50” deep
• Frequency Selection Steps: 25 kHz
• Frequency Stability: ±0.001 %
• Front end bandwidth: ±5.5 MHz, @ -3 dB
• Sensitivity: 20 dB Sinad: 0.9 uV(-108 dBm), A weighted