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

Product #585790

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Item Note:

This product has been discontinued but may be available as a Open Box item.

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See All Nady Combo Wireless Systems

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.

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 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

Order this wireless system to give yourself options to match your performance needs.


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

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
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