Item #: NAD U81OCTHT LIST

Nady U-81 Octavo 8 Channel UHF Handheld Wireless Mic System

The U-81 Octavo system allows 8 wireless mics to be used at one time, making it ideal for events, churches, schools, karaoke and more!
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Product Description

The U-81 Octavo Handheld Microphone System operates on eight independent single-channel UHF wireless receivers in a single housing for simultaneous operation of up to eight transmitters. Front panel LED display indicates the RF and AF status for each channel. Ch. 1-8 are individually balanced XLR Mic Level outputs and unbalanced Line Level sum 1/4 inch jack output for 8-in-1 mix audio output with separate volume control for each channel.

Nady’s exclusive patented companding circuitry with 120dB dynamic range and highest quality audio for unsurpassed UHF performance. Dual removable high gain antennas with TNC connector, front or back mounting. Standard 19 inch 1U, all-metal rackmount housing. Externally powered with AC/DC adapter (included) Comes with 8 HT-8U Handheld Microphone Transmitter.

Nady DM-50D neodymium cartridge delivers transparent vocals, maximum feedback rejection and minimal handling noise, On/Standby/Off switch allows convenient audio muting while transmitter on while Status LED indicator flashes once for Unit On; lights steady for Low Battery Alert. Rugged ABS and rubber-coated housing with integral antenna.

Nady U-81 Octavo 8 Channel UHF Handheld Wireless System Features
  • Operates on select UHF frequencies
  • Eight independent single-channel UHF wireless receivers in a single housing for simultaneous operation of up to eight transmitters
  • Front panel LED display indicates the RF and AF status for each channel
  • Ch. 1-8 individually balanced XLR Mic Level outputs and unbalanced Line Level sum 1/4 inch jack output for 8-in-1 mix audio output with separate volume control for each channel
  • Nady’s exclusive patented companding circuitry with 120dB dynamic range and highest quality audio for unsurpassed UHF performance
  • Dual removable high gain antennas with TNC connector, front or back mounting
  • Standard 19 inch 1U, all-metal rackmount housing
  • Externally powered with AC/DC adapter (included)
  • HT-8U Handheld Microphone Transmitter
    • Nady DM-50D neodymium cartridge delivers transparent vocals, maximum feedback rejection and minimal handling noise
    • On/Standby/Off switch allows convenient audio muting while transmitter on
    • Status LED indicator flashes once for Unit On; lights steady for Low Battery Alert
    • Uses two AA alkaline or NiMH batteries
    • Rugged ABS and rubber-coated housing with integral antenna


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Helpful Info about the Manufacturer
Phone:  510-652-2411 Warranty:  Please read the warranty card supplied with your product or access it online. Generally, the limited warranty for professional wireless and audio equipment is one year

Product Specifications

Nady U-81 Octavo 8 Channel UHF Handheld Wireless System Specifications
  • Overall System Performance
    • RF Carrier Frequencies: Selected factory installed frequencies between 902-928MHz and 944-952MHz
    • Frequency stability: +/-0.005% (Crystal Controlled)
    • Audio Deviation: FM +/-20kHz normal, +/-50kHz maximum
    • Frequency Response: 20Hz-20kHz, -3dB
    • Dynamic Range: 120dB
    • Harmonic Distortion: 0.5% THD, normal
    • Operating Range: 250 feet normal, 500+feet max line of sight
  • Receiver
    • Reception: Mono antenna reception
    • Antennas: 10 inches (25.4 cm) Dual adjustable angle
    • Mute Threshold: -95dBm (none-adjustable)
    • Image Rejection: -70dB, minimum
    • Balanced output: Audio outputs: +/-24mV fixed level (600 Ohms)
    • Unbalanced MIX output: Audio output: 360mV variable level (Open load)
    • Connectors: Balanced: XLR, Unbalanced: 1⁄4 inch TS, Antennas: TNC connector. DC in: 2.1mm barrel type Indicators, Power On, RF and AF LEDs
    • Controls: Power ON/OFF buttons, Volume Controls
    • Power Requirement: 15VDC/1200mA
    • Dimensions: (WxDxH) 14.25 x 12 x 1.75 inches (36.20x30.50x4.45cm)
    • Weight: 7.20 lbs (3.37 Kg)
  • Transmitters
    • UH-81 Handheld: Integral Nady DM-50D neodymium dynamic cartridge
    • UH-81: Power ON/STDBY/OFF
    • RF Power: 20mW normal (50mW Maximum allowed by FCC)
    • Harmonics and Spurs: < -50 dB
    • Antennas: Internal antennas
    • LED Indicators: Single LED flashes once for ‘ON’, lights steady for ‘LOW BAT’
    • Battery: 2xAA Alkaline or NiMH batteries
    • Battery Life: 8-10 Hours (Alkaline)
    • Dimensions, UH-81: 10.5 x 1.875 inches (26.7 x 4.8 cm)
    • Weight: 7.5 oz (213 g) without battery
Buy with Confidence
All wireless microphone systems available through AMS are compliant with current FCC rules for safe operation without a license when they leave our warehouse. If you choose to modify a system after purchase, it may no longer be in compliance and may therefore require a license to operate. To learn more about the FCC’s rules regarding wireless microphones (which are subject to change), please call the FCC at 888-CALL-FCC (TTY: 888-TELL-FCC) or visit http://www.fcc.gov/encyclopedia/wireless-microphones.

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