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Nady U-81 Octavo HT Wireless Microphone System

BH #NAU81OHT • MFR #U-81 OCTAVO HT
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Nady U-81 Octavo HT Wireless Microphone System
Key Features
  • Reliable UHF Operation
  • Four Discrete Microphone Channels
  • Includes HT-8U Handheld Transmitters x8
  • XLR Mic, and 1/4" Line Outputs
The Nady U-81 Octavo HT Wireless Microphone System features UHF operation and simultaneous use of the 8 included HT-8U handheld transmitters. The U-81 receiver is 19" rackmountable and features 8 separate volume controls, LED displays for audio level and AF strength, and 8 discrete outputs over XLR (mic level) and 1/4" phone (line level) connections. Its 19" all-metal frame will easily install into an audio rack, and is an ideal solution for schools, theaters, houses-of-worship, bars, nightclubs and more.
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Nady U-81 Overview

The Nady U-81 Octavo HT Wireless Microphone System features UHF operation and simultaneous use of the 8 included HT-8U handheld transmitters. The U-81 receiver is 19" rackmountable and features 8 separate volume controls, LED displays for audio level and AF strength, and 8 discrete outputs over XLR (mic level) and 1/4" phone (line level) connections. Its 19" all-metal frame will easily install into an audio rack, and is an ideal solution for schools, theaters, houses-of-worship, bars, nightclubs and more.

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 ¼" 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

Nady U-81 Specs

System
Type of System
8-Channel UHF Handheld
RF Carrier Frequency Range
Factory installed channels between
902-928MHz and 944-952MHz
Approx. Working Range
250 feet typical - up to 500+ feet optimum line-of-sight
Frequency Stability
+/-0.005% (Crystal Controlled)
Deviation
FM +/-20kHz normal, +/-50kHz maximum
Frequency Response
20Hz-20kHz, -3dB
Dynamic Range
120dB
THD
0.5% THD, normal
Operating Range
250' (76.2m) normal, 500' (152.4m) max line of sight
# Of Channels
4
Receiver
Type of Receiver
8-Channel UHF Rackmountable
Reception Mode
Mono antenna reception
Threshold Range
-95dBm (none-adjustable)
Image Rejection
-70dB, minimum
Type of Outputs
Balanced: XLR, Unbalanced: 1⁄4" TS, Antennas:
TNC connector. DC in: 2.1mm barrel type
Balanced output: Audio outputs: +/-24mV fixed level (600 Ohms)
Unbalanced MIX output: Audio output: 360mV variable level (Open load)
Power Requirements
15VDC/1200mA
Display
Power On, RF and AF LEDs
Controls
Power ON/OFF buttons, Volume Controls
Antenna Type
10" (25.4 cm) Dual adjustable angle
Dimensions
4.25 x 12 x 1.75" (36.20 x 30.50 x 4.45cm)
Weight
7.20 lbs (3.37kg)
Transmitter
Type of Transmitter
HT-8U Handheld
Controls
Power ON/STDBY/OFF
RF Power
20mW normal (50mW Maximum allowed by FCC)
Harmonics
< -50 dB
Antenna
Internal
Power Supply
2xAA Alkaline or NiMH batteries
8-10 Hours (Alkaline)
Display
Power & Low Battery LEDs
Dimensions
10.5 x 1.875" (26.7 x 4.8cm)
Weight
7.5 oz (213g) without battery
Packaging Info
Package Weight
14.7 lb
Box Dimensions (LxWxH)
21.1 x 13.5 x 5.3"

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