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Nady U-81 OCTAVO 4 Handheld 4 Lav Wireless System (10/11/12/14/15/16/17/18)
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8-channel wireless receiver with 4 hand-held transmitters and 4 bodypack transmitters with lavalier mics.

This Nady U-81 OCTAVO wireless 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 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 UH-81 Handheld Transmitter
The Nady DM-50D neodymium cartridge in each UH-81 Handheld Transmitter helps them deliver transparent vocals, maximum feedback rejection, and minimal handling noise. They also have an On/Standby/Off switch for convenient audio muting, a status/low battery LED indicator, and are made of rugged ABS and rubber-coated housing with integral antennas.

UB-81 Bodypack Transmitters
The 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 system 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.

Nady U-81 OCTAVO 4 Handheld 4 Lav Wireless System (10/11/12/14/15/16/17/18) Features:

  • Nady wireless mic system includes:
    1 U-81 OCTAVO Wireless System
    8 UH-81 Handheld Transmitters
    8 UB-81 Bodypack Trasmitters with lavalier microphones

    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)


    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

    BT-8U Bodypack Transmitter:
    Choice of headworn or 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


Nady U-81 OCTAVO 4 Handheld 4 Lav Wireless System (10/11/12/14/15/16/17/18) Specifications:

  • Overall
    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

    UH-81 Handheld Transmitter
    Input Connectors: UH-Integral Nady DM-50D neodymium dynamic cartridge
    Controls: UH-81: Power ON/STDBY/OFF
    RF Power: 20mW normal (50mW Maximum allowed by FCC) Harmonics and Spurs: < -50dB
    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: 10.5" x 1.875", 26.7cm x 4.8cm
    Weight: 7.5oz. (213g) without battery


Nady U-81 OCTAVO 4 Handheld 4 Lav Wireless System (10/11/12/14/15/16/17/18)

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.

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