The Lectrosonics DSR4 Four-Channel Slot Receiver Location Wireless Kit from B&H packages the quad-channel receiver with transmitter options to provide a versatile field recording solution for ENG, mobile video production, sports coverage, reality TV, and other professional-level broadcasting applications. The three DBSM wireless bodypack transmitter/recorders are perfect when the on-camera talent wants to use a discreet lavalier microphone, while the single DPR-A plug-on wireless transmitter/recorder allows the user to plug in their preferred handheld XLR microphone—great for man-on-the-street-style interviews and reporting. Both transmitters feature onboard recording capabilities when wireless transmission is not the best option.
The Lectrosonics DSR4 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. It 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.
- 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.
- 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.
- 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.
- 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
- 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.
- DSR4EXT: Bottom plate kit for external audio outputs, with two TA5M connectors and one DC jack
- DSR4SUPER: Bottom plate DB25 connector kit and mounting bezel for SuperSlot docks
- DSR4BATTSLEDTOP: Top-mounted L-type battery sled, with two TA5 audio output jacks and one DC jack
- DSR4BATTSLEDBOTTOM: Bottom-mounted L-type battery sled, with two TA5 audio output jacks and one DC jack
- DSR4DB25: End plate connector kit for Superslot sockets, no mounting bezel included
- DSR4EXTUSB: Bottom plate kit for external audio outputs, with two TA5M connectors, Hirose 4 DC jack, and USB-C connector for programming and control
- 36016: Adapter bezel for mounting the DSR4 in an Octopack or Quadpack, includes 4 screws
- 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 and 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
Offering 100% digital architecture with secure AES-256 encryption, a wider frequency range, a high-density mode for incredibly tight channel spacing, extended battery life, and timecode jam sync support in the same ultracompact size and shape as its SMWB predecessor, the Lectrosonics DBSM single-battery digital wireless bodypack transmitter/recorder delivers premium audio quality, dependability, and versatility for professional sound recordists working in demanding production environments such as TV, film, sports, and live sound.
From its rugged aluminum housing and non-corrosive finish to its water-resistant control panel and OLED display, the DBSM is ready to take on the challenges of any shooting scenario. The servo bias input circuitry can accommodate an electret lavalier mic, a dynamic mic, or a line-level input, and the TA5M input jack is also able to accept a timecode feed. Whether used as a transmitter or a standalone recorder, the DBSM delivers pristine 24-bit / 48 kHz audio. It is compatible with D Squared, DCR822, DCHR/DCHT, and Duet systems.
Digital transmitters offer new opportunities including encryption, flatter phase and amplitude response, quieter noise floor, and increased metadata during transmission. The latest design can also increase battery life, allow for extremely tight channel spacing, and increased range per average RF power.
- Selectable output power to maximize operating range or battery life
- Ultralightweight, corrosion-resistant housing
- OLED interface with lockout option
- Servo bias input circuitry
- IR (infrared) port for fast setup
- Alternate use as recorder on internal microSDHC memory card (16GB card included)
- Timecode jam sync capability with TCXO for <1 ppm accuracy
- High-density mode for ultratight channel spacing
- Compatible with existing accessories from SMWB including SMBATELIM, pouches, and clips
- Wireless Designer can include HDM in coordinations (requires PC version 2.0.31 and Macversion 2.0.26 or higher)
- 1 x AA battery
- AMM-19 antenna
- AMM-22 antenna
- SMWBBCUPSL belt clip
- PSMWB pouch with swivel clip
- SMKITTA5 connector kit with boot
- 16GB microSD card
The Lectrosonics DPR-A is a digital plug-on wireless transmitter equipped with a built-in recorder and an SMA-mount whip antenna for longer operating range. It is compatible with all D-Squared Series receivers including the DSQD, DCHR, and DCR822 receivers. Powered by 4th generation Lectrosonics digital technology, the DPR-A features high-efficiency circuitry specially developed for extended operating time on two AA batteries. The unit offers reliable, studio-quality audio (with a particularly low noise floor), RF power selections at 25 and 50mW, and is well suited for professional use in TV, broadcast, and film as well as houses of worship and concert venues.
The DPR-A accepts mic- or line-level signals via a standard XLR connector and provides selectable 5, 15, 48V phantom power to condenser microphones. The input stage employs an ultralow-noise op-amp for quiet operation. It offers a broad range of input-gain adjustment along with DSP-controlled limiting to deliver pristine audio at a 24-bit/48 kHz resolution. The pure digital architecture enables AES 256-CTR encryption for applications requiring high-level security.
The unit can also be used as a standalone recorder, with 24-bit/48 kHz WAV files recorded onto a microSDHC card. The DPR-A can be jammed with timecode sync for discreet audio file alignment during postproduction. Note that the transmitting and recording functions cannot be used simultaneously. Users must choose to transmit or record.
Setup and adjustments are achieved through a backlit LCD, membrane switches, and an intuitive menu structure. The DPR-A also offers hands-free setup and adjustment using audible tones via the LectroRM mobile app (available separately). The DPR's housing is constructed of solid machined aluminum for lasting performance.
The unit ships with two AMM whip antennas. A PHTRAN3 leather pouch is included to protect your transmitter when working in the field.
- The DPR-A input preamp features a unique servo-bias design that delivers audible improvements over conventional transmitter inputs, making the unit easier to use and much harder to overload.
- The input gain is adjustable over a 55 dB range in 1 dB steps, allowing for an exact match to the input signal level, while maximizing the dynamic range and signal-to-noise ratio.
- The transmitter employs a digitally controlled analog audio limiter prior to the A/D converter. The limiter has a range greater than 30 dB for excellent overload protection. A dual-release envelope makes the limiter acoustically transparent while maintaining low distortion.
- The DPR-A tunes in coarse or fine steps across the entire 138 MHz UHF frequency range, from 470 to 608 MHz.
- The external SMA antenna jack accepts Lectrosonics steel flex wire AMM (included) or AMJ series antennas.
- Setup and adjustments are enabled through a backlit LCD, membrane switches, and an intuitive menu structure.
- The IR Sync port lets you transfer the frequency settings from the receiver to the transmitter for quick setup.
- LEDs provide red/green indications of the audio level from -20 dB to the onset of limiting, enabling accurate input-gain adjustment.
- The LectroRM app (available separately) is a mobile application that lets you remotely control the DPR. It allows you to change the audio level, frequency, and lock mode wirelessly. The app is available for iOS and Android operating systems.
- Operates for up to 6 hours on two AA batteries—3.5 hours with 48V phantom
- Firmware updates are made via the microSDHC card.