Sony Professional UTX-B40, Wireless Bodypack Transmitter with Omni Lavalier Mic (UC14: 470 to 542 MHz, UC25: 536 to 608 MHz, UC90: 941 to 960 MHz)

Vendor: Sony
Sony Professional UTX-B40, Wireless Bodypack Transmitter with Omni Lavalier Mic (UC14: 470 to 542 MHz, UC25: 536 to 608 MHz, UC90: 941 to 960 MHz) The demand for high-quality audio is increasing as...
Frequency Band

Sony Professional UTX-B40, Wireless Bodypack Transmitter with Omni Lavalier Mic (UC14: 470 to 542 MHz, UC25: 536 to 608 MHz, UC90: 941 to 960 MHz)

The demand for high-quality audio is increasing as high-resolution content becomes prevalent in the video production industry. Today’s content creators are faced with the challenge of capturing high-quality audio quickly, reliably, and with limited resources. Offering superb sound quality with digital processing, reliable RF transmission, true double tuner diversity reception, and friendly features, the UWP-D series is an ideal partner for ENG (electronic news gathering) and EFP (electronic field production), as well as documentaries and weddings.

The Sony Professional UTX-B40 is a wireless bodypack transmitter compatible with the URX-P40 camera-mount receiver. Compact and lightweight with robust, all-metal construction, this bodypack is well suited for tough operating conditions, while remaining comfortable for the talent to wear. It provides up to 8 hours of operation on two AA batteries, with a selectable 5/30mW RF power output and a transmission range up to 330'. The Sony Professional UTX-B40 comes with an ECM-V1BMP omnidirectional lavalier microphone optimized for speech. The transmitter has a locking, 3.5mm BMP-type microphone input connector with an adjustable input level to accommodate other compatible lavalier or headset microphones of your choice. The transmitter offers an 18 MHz bandwidth with 654 selectable UHF frequencies. The Sony Professional UTX-B40 is backward-compatible with Sony WL-800 and UWP Series systems.

  • High-quality sound with Sony digital audio processing
  •  NFC SYNC function for quick and easy secure channel setting (IR sync capability with URX-P03, URX-P03D, and URX-S03D receivers)
  •  Auto gain mode volume control
  •  +15 dB gain volume boost mode for off-mic audio
  •  Line Input
  •  Transmitter frequency sent to the receiver for matching multiple receivers to one transmitter
  •  Variable muting function
  •  Compatibility with Sony WL-800/UWP/UWP-D series
  •  High visibility OLED display, ideal for indoor/outdoor use
  •  USB connector for power supply
  •  Includes ECM-V1BMP lavalier microphone


  • Digital Audio Processing for high-quality sound: Advanced digital audio processing technology by Sony assures high-quality sound with improved transient response performance. A new [optional] digital audio interface enables direct digital sound recording with many Sony professional camcorders and Alpha interchangeable lens cameras via the SMAD-P5 Multi Interface MI shoe adaptor, bypassing A/D and D/A conversion stages to further ensure excellent sound quality.
  • Fast, easy frequency setting: Sony’s uniquely user-friendly NFC SYNC feature allows quick, intuitive secure channel setting between transmitter and receiver.
  • Light, compact design: Reduced system size and weight enable superior mobility in a wide range of applications including news, documentaries, weddings, and remote production. The receiver’s compact size and light weight make it an ideal partner for using small camcorders and interchangeable-lens digital cameras.
  • Oscillator Type: Crystal-controlled PLL synthesizer
  • Antenna Type: 1/4 λ wavelength wire antenna
  • Carrier Frequencies: 14UC: 470.125 MHz to 541.875 MHz (UHF-TV channels 14 to 25), 25UC: 536.125 MHz to 607.875 MHz (UHF-TV channels 25 to 36), 42LA: 638.125 MHz to 697.875 MHz (UHF-TV channels 42-51), 90UC: 941.625 MHz to 951.875 MHz, 953.000 MHz to 956.125 MHz, and 956.625 MHz to 959.625 MHz, 21CE : 470.025 MHz to 542.000 MHz(UHF-TV channels 21 to 29), 33CE : 566.025 MHz to 630.000 MHz(UHF-TV channels 33 to 40), 42CE : 638.025 MHz to 694.000 MHz (UHF-TV channels 42 to 48), 38CN : 710.025 MHz to 782.000 MHz(UHF-TV channels 38 to 46), E. 794.125 MHz to 805.875 MHz, BJ: 806.125 MHz to 809.750 MHz, KR : 925.125 MHz to 937.500 MHz
  • RF Output Power: 30 mW/5 mW selectable (UC, U, CE, LA, CN models), 10 mW/2 mW selectable (J, E, KR models)
  • Capsule Type: Electret condenser
  • Directivity: Omni-directional
  • Input Connector: 3.5mm diameter 3-pole locking mini-jack
  • Reference Audio Input Level: –60 dBV (MIC input, GAIN MODE set to NORMAL, 0 dB attenuation), +4 dBu (LINE input)
  • Audio Attenuator Adjustment Range: 0 dB to 27 dB (3dB steps)
  • Frequency Response: 23 Hz to 18 kHz (Typical) (UC, U, CE, LA, CN, E, KR models), 40 Hz to 15 kHz (Typical) (J model)
  • Signal-to-Noise Ratio: 60 dB (–60 dBV, 1 kHz input), 102 dB (GAIN MODE set to AUTO GAIN, max.), 96 dB (GAIN MODE set to NORMAL, max.)
  • Distortion: 0.9% or less (–60 dBV, 1 kHz input)
  • Audio Delay: Approx. 0.35 ms
  • Tone Signal Frequency: In UWP-D compander mode: 32.382 kHz, In UWP compander mode: 32 kHz, In WL800 compander mode: 32.768 kHz
  • Display: OLED
  • Power Requirements: DC 3.0 V (two LR6/AA-size alkaline batteries), DC 5.0 V (supplied from USB Type-C connector)
  • Battery life: *Approx. 8 hours with an output power of 30 mW (UC, U, CE, LA, CN models), Approx. 10 hours with an output power of 10 mW (J, E, KR models) *Battery life has been measured with two Sony LR6/AA-size alkaline batteries at 25 °C (77 °F).
  • Operating Temperature: 0 °C to 50 °C (32 °F to 122 °F)
  • Storage/Transport Temperature: -4°F to 140°F (-20°C to +60°C)
  • Dimensions: 63 × 73 × 19 mm (2 1/2 × 2 7/8 × 3/4 in.) (W / H / D) (excluding antenna)
  • Mass: Approx. 83 g (2.9 oz) (excluding batteries)