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Nady U-81 OCTAVO Omni Lav Wireless System (11/12/13/16/17/19/20/21)

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This Nady U-81 OCTAVO wireless mic system is a professional 8-channel UHF wireless system which offers clear, natural-sounding wireless, providing you with 8 UB-81 bodypack transmitters with lavalier ... Click To Read More About This Product

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This Nady U-81 OCTAVO wireless mic system is a professional 8-channel UHF wireless system which offers clear, natural-sounding wireless, providing you with 8 UB-81 bodypack transmitters with lavalier microphones. The Nady U-81 OCTAVO wireless system delivers eight discrete channels on selected frequency bands 902-928MHz and 944-952MHz for interference-free performance in any application or locale. The wireless mic system also features Nady's proprietary companding and low noise circuit for an industry best 120dB dynamic range.

Nady UB-81 Bodypack Transmitters
The Nady UB-81 bodypack transmitter is lightweight yet made of a rugged ABS housing. Each comes with a lavalier microphone operation with an integral antenna, and a locking 3.5mm mini-jack which provides secure connection for the mic or an instrument cable if you so choose. Other features on the wireless transmitter include convenient input volume control for proper level adjustment, or instrument operation without input level control, an Off/Standby/On switch for audio muting while the transmitter is on, and a status/low-battery level LED indicator. Each UB-81 runs on a single 9V alkaline or NiMH battery.

Consumer Alert:

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this 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 FCCs wireless microphone website at:


  • Nady wireless mic system includes:
  • 1 U-81 OCTAVO Wireless System
  • 8 UB-81 Bodypack Transmitters with lavalier mics
  • Wireless System
    • 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" 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" 1U, all-metal rackmount housing
    • Externally powered with AC/DC adapter (included)
    UB-81 Bodypack Transmitter:
    • Comes with lavalier microphone operation with convenient input volume control for proper level adjust, or instrument operation without input level control
    • Off/Standby/On switch allows convenient audio muting while transmitter on
    • Locking 3.5mm mini-jack provides secure connection for removable mic or instrument cable
    • Status LED indicator flashes once for unit on; lights steady for low-battery alert
    • Single 9V alkaline or NiMH battery
    • Lightweight, rugged ABS housing with integral antenna
    • 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
    Wireless Receiver
    • Reception: Mono antenna reception
    • Antennas: 10" (25.4cm) 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" 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, (36.20cm x 30.50cm x 4.45cm)
    • Weight: 7.20lb. (3.37kg)
    UB-81 Bodypack Transmitter
    • Input Connectors: 3.5mm locking mini-jack
    • Controls: UB-81: ON/STDBY/OFF, Input Level Control (LT/HM), selectable inputs-internal HM/LT switches
    • Antennas: Internal antennas
    • LED Indicators: Single LED flashes once for "ON," lights steady for "LOW BAT"
    • Battery: Single 9V Alkaline or NiMH battery
    • Battery Life: 8-10 Hours (Alkaline)
    • Dimensions: 4.25" x 2.5" x 1.0", 10.8cm x 6.4cm x 2.5cm
    • Weight: 3.1oz. (88g) without battery
    Pro Coverage
    Manufacturer's Warranty
    Wireless Equipment (Most) *1 Year
    DKW-Duo, DKW-3 *90 Day
    Pro-Audio (Most *1 Year
    SPC-4C, ProPerformer microphones *90 Day
    RSM-1,2,3,4,& 5 *1 Year
    TRM-6 *1 Year
    Speakers/Powered Speakers *1 Year
    Headphones *1 Year
    Power Amps *1 Year
    Products identified as a "Blem" or "Refurb" carry a 90-day warranty.

    • Customer Reviews

    Review Snapshot

    by PowerReviews
    NadyU-81 OCTAVO Omni Lav Wireless System (11/12/13/16/17/19/20/21)

    (based on 2 reviews)

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    Reviewed by 2 customers

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    (2 of 2 customers found this review helpful)



    By William Clark

    from Cambridge, MA

    Comments about Nady U-81 OCTAVO Omni Lav Wireless System (11/12/13/16/17/19/20/21):

    This kit is absolutely worthless. Tried using it for an "interview panel" type event, but ended up using handheld wireless mics instead. When firing up the receiver, all 8 channels RF lights would flicker on and off randomly as if the belt packs were transmitting and dropping off...but none of them had batteries in them. Tested in 3 other locations (3 different towns... not different parts of the building) to verify whether it was interference or not, and it certainly wasn't.

    (1 of 1 customers found this review helpful)



    By Richard Jacobs

    from Baltimore, Maryland

    Comments about Nady U-81 OCTAVO Omni Lav Wireless System (11/12/13/16/17/19/20/21):

    just hooked it up this afternoon at school (small hall, Yamaha EMX 512 and 2 @ Peaveys with 15's)to field test before a talent show. Easy enough to connect, used the 1/4" output option. Found that the 5th set had a high freq. whistle/hum when turned off everything was fine. Sound quality over all is ok, but gains are very sensitive. If you try to ride it up with the channel you get low freq hum. Didn't try the XLR ports too pricey may take a few to try. Need to call manufacture for redress on unit no. 5, U8-21. Hopefully w ecan do swap.

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