R400A/RMPR400-1 Digital Hybrid Wireless Diversity Receiver - $799.00 : Commercial Sound Systems for Michigan Churches,Schools,Business-Roth Electric Sound

R400A/RMPR400-1 Digital Hybrid Wireless Diversity Receiver


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R400A/RMPR400-1 Digital Hybrid Wireless Diversity Receiver, Installed in a RMPR400-1 Rack Mount

The R400a is a high performance, triple-conversion, frequency synthesized, UHF receiver fully compatible with all Lectrosonics 400 series transmitters, and a number of analog models. The proprietary audio processing includes a DSP (digital signal processor) for very low distortion and a superior signal to noise ratio. The DSP eliminates a compandor and its artifacts to provide exceptional audio quality when operating in its native hybrid mode. Special DSP algorithms also provide compatibility modes for use with Lectrosonics 100 and 200 Series analog transmitters.

The R400a features a powerful menu-driven LCD graphic display operated with a push-button switch and a dual function rotary encoder control as a convenient means of viewing and altering settings.The LCD main window displays the pilot tone indicator, diversity antenna activity, RF and audio levels, operating frequency, transmitter frequency switch settings and transmitter battery status.

Settings can be changed using the MENU functions. A built-in RF spectrum analyzer is included to conduct site surveys to find interference-free operating frequencies. The analyzer quickly tunes the receiver across its 256 frequencies and records a marker on the LCD indicating the strength of any RF signals picked up. Within less than a minute, a complete display is generated showing the RF activity across the entire tuning range of the receiver. An area with little or no RF activity is then easy to locate and select.


  • Digital Hybrid Wireless™ (U.S. Patent #7,225,135)
  • SmartSquelch™
  • SmartDiversity™
  • SmartTune™ for auto frequency selection
  • 256 selectable UHF frequencies
  • RF-controlled digital noise filters
  • Low noise, Robust RF Front End
  • DSP-based pilot tone
  • Graphics type backlit LCD display
  • Independent balanced XLR and unbalanced 1/4-inchaudio outputs
  • Compatiblity modes for use with analog transmitters

    Operating Frequencies (MHz)

  • Block 21: 537.600 - 563.100
  • Block 22: 563.200 - 588.700
  • Block 23: 588.800 - 607.900, 614.100 - 614.300
  • Block 24: 614.400 - 639.900
  • Block 25: 640.000 - 665.500
  • Block 26: 665.600 - 691.100
  • Block 27: 691.200 - 716.700
  • Block 28: 716.800 - 742.300
  • Block 29: 742.400 - 767.900
  • Block 944: 944.100 - 951.900


  • Frequency Adjustment Range: 25.5 MHz in 100 kHz steps
  • Channel Separation: 100 kHz
  • Receiver Type: Triple conversion, superheterodyne,244 MHz, 10.7 MHz and 300 kHz
  • Frequency Stability: ±0.001 %
  • Front end bandwidth: ±30 MHz @ -3 dB
  • Sensitivity: 20 dB Sinad: 1 uV (-107 dBm), Aweighted; 60 dB Quieting: 1.5 uV (-104 dBm), A weighted
  • Squelch quieting: Greater than 100 dB
  • AM rejection: Greater than 60 dB, 2 uV to 1 Volt(Undetectable after processing)
  • Modulation acceptance: 85 kHz
  • Image and spurious rejection: 85 dB
  • Third order intercept: 0 dBm
  • Diversity method: Phased antenna combining -SmartDiversity™
  • FM Detector: Digital Pulse Counting Detectoroperating at 300 kHz
  • Antenna inputs: Dual BNC female, 50 Ohm impedance
  • Audio outputs Rear Panel XLR adjustable from -50 dButo +5 dBu in 1 dB steps. Calibrated into a typical 10 k Ohm balanced load. Candrive 600 Ohm load. Rear Panel 1/4 inch jack adjustable from -55 dBu to +0 dBuin 1 dB steps
  • Rotary Control Knob: Combined push/rotate switchcombination for menu selection and system configuration.
  • Pushbutton: Press and hold several seconds for POWEROFF. Momentary press (if unit is powered up) for return to previous window
  • LCD Main window: Pilot tone; antenna phase,transmitter battery status; audio level, RF level; Battery timer; Frequency;and Transmitter switch setting
  • Audio output level adjustment: -50 dBu to +5 dBu, XLRand 1/4 inch connectors independently adjustable
  • Battery level tracking: Receiver and transmitter (9 Vbattery) in 1/10th volt steps, accuracy +/- 0.2 V. Transmitter (AA battery),accuracy +/- 0.05 V. Timer option available.
  • Scanning mode: Coarse and fine modes for RF spectrumsite scanning
  • Audio test tone: 1 kHz, -50 dBu to +5 dBu output,< 1% THD
  • Transmitter battery type selection: 9 V alkaline, 9 Vlithium, AA alkaline, AA lithium, TIMER
  • Phase invert: Audio output phase normal or inverted
  • Smart NR (noise reduction): OFF, NORMAL, FULL modes(avail in 400 Series mode only)
  • Audio Performance: (These specs apply to 400 Seriesmode only.)
  • Frequency Response: 30 Hz to 20 kHz (+/- 1 dB)(Overall system frequency response will vary depending on transmitter used)
  • THD: 0.2% (typical)
  • SNR at receiver output (dB): SmartNR OFF: 103.5 NoLimiting, 108.0 w/Limiting; SmartNR NORMAL: 107.0 No Limiting, 111.5w/Limiting; SmartNR FULL: 108.5 No Limiting, 113.0 w/Limiting
  • Input Dynamic Range: 125 dB (with full Tx limiting)
  • Rear Panel Controls and features: XLR and 1/4" phoneaudio output jack; External CD input; BNC antenna connectors
  • Power, Ext DC: Minimum 8 volts to maximum 18 voltsDC; 1.6W, 200 mA maximum
  • Weight: 13 oz
  • Dimensions (W x H x D): 5.50" x 1.75" x 6.25"
    • Model: R400A/RMPR400-1
    • Manufactured by: Lectrosonics

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    Most users do not need a license to operate a wireless microphone system. Nevertheless, operating a microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888- CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s wireless microphone website at www.fcc.gov/cgb/wirelessmicrophones.