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Nady U-2100 Over-the-Ear UHF Wireless Microphone System with 2 x HM-45U Unidirectional Condenser Headset Microphones

BH #NAU2100HM45U • MFR #U-2100 / HM-45U
Nady U-2100 Over-the-Ear UHF Wireless Microphone System with 2 x HM-45U Unidirectional Condenser Headset Microphones
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Nady U-2100 Overview

  • 1Description
  • 2U-2100 Wireless Receiver
  • 3LT-1100 Bodypack Transmitter
  • 4HM-45U Uni-Directional Headset

The U-2100 Over-the-Ear UHF Wireless Microphone System from Nady includes a 100-channel U-2100 dual receiver, an AC-2100 power supply, two LT-1100 bodypack transmitters, and two HM-45U unidirectional headset microphones. The U-2100 features 100 user-selectable UHF frequencies to provide clear and transparent audio with full frequency response, and a long-lasting rugged ABS housing. The system offers uninterrupted PLL UHF performance with 120 dB dynamic range and operation, up to 500' line-of-sight.

The HM-45U headset microphone's arch-shaped ear rest is placed over whichever ear you choose. The tip of the supporting arch rests behind the ear, providing the necessary stability during use. The mic boom descends from the ear and should be placed close to the mouth in a favorable audio position. You can bend the boom and headset slightly for optimal fit. You can also connect the locking 3.5 mm mini-jack to the input jack of the bodypack transmitter or power supply adapter. When using a power supply adapter, you can connect it to the microphone input of an audio preamp that provides phantom power.

U-2100 Wireless Receiver

  • Uninterrupted PLL UHF performance with 120 dB dynamic range and operation, up to 500' line-of-sight
  • 100 UHF frequencies per band
  • Frequency Auto-Scan for quickly, conveniently finding a clear channel or user selectable preset channel, with selected channel stored in memory for subsequent use
  • ASC (Auto-Sync Channels) download feature sends selected Channel information to transmitter via IR sender for easy frequency synchronization
  • Sophisticated IF filtering for optimal simultaneous operation of multiple systems in the same location
  • Rear panel removable swivel BNC antennas
  • Front panel touch control buttons for ease of channel selection and ASC operation
  • Front panel LCD backlit display including Channel Selected, RF/AF bar graph
  • Externally powered with included universal power adapter   
  • Rugged all ABS plastic housing for long-term durability

LT-1100 Bodypack Transmitter

  • Sliding power switch Off/ Mute/On allows convenient audio muting with the transmitter On
  • LCD backlit display including channel and frequency selected, battery level status
  • Manual selectable channel with up/down recess buttons or ASC sync with RX selected channel and frequency
  • Input level pot
  • Convenient, economical operation with two AA alkaline or NiMH
  • Compact housing, durable external attached antenna and unique locking 3.5mm mini plug connector for instrument cable ormic plug

HM-45U Uni-Directional Headset

  • Wide bandwidth, unidirectional electret condenser mic ensures clean transparent audio and enhanced vocal pickup with improved gain before feedback
  • Durable, thin metal frame can be easily molded to any user
  • Ergonomic single-ear design and comfortable fit with or without glasses, hats, or headphones 
  • Tiny capsule with diameter of 5mm for hours of comfortable use
  • Three sizes of foam windscreen included to reduce wind and popping noise
  • Extendable boom fully adjustable 100° for optimum mic capsule placement


UPC: 634343287929

Nady U-2100 Specs

System Performance
Operating Frequency RangeA: 480 to 504.75 MHz
B: 505 to 529.75 MHz
FrequencySynthesized: PLL (100 channels selectable) 250 kHz/step
Frequency StabilityPII System: < 0.005%
Frequency Response50 Hz to 18 kHz ±3 dB
Dynamic Range120 dB
Harmonic Distortion< 0.5%
ModulationFM (F3E) ±25 kHz normal, ±75 kHz maximum
Operating RangeTypical: 150 to 250' / 45.7 to 76.2 m
Maximum Line of Sight: 500.0' / 152.4 m
SystemDual conversion Super Heterodyne
Selectivity60 dB, normal ±75 kHz offset
Image Rejection-70 dB, minimum sensitivity
-107 dBm, normal spurious rejection
65 dB, normal
Mute ThresholdAdjustable (-65 to -95 dBm)
ControlsGroup/channel/autoscan, IR ASC sync buttons, power on/off, switch, mute level pot, volume level pot
DisplayLCD/LED: Two-digit LCD panel indicating selected channel; RF/AF bar graph indicator, battery levels, TX channel A and B, LED indicators
Audio Outputs1 x 1/4" / 6.3 mm line-out unbalanced, adjustable line audio output
1 x XLR mic balanced, fixed mic level audio output
Output ImpedanceUnbalanced: 1 kOhm
Balanced: 600 Ohms loads
Power Requirement13.5 VDC, 0.4 A
Antennas2 x removable swivel BNC antennas
ConstructionHousing: ABS plastic
Dimensions8.0 x 6.0 x 1.2" / 20.4 x 15.3 x 3.2 cm
Weight15.1 oz / 428.1 g
Bodypack Transmitter
RF Output Power14 dBm (25 mW typical) / 50 Ohms
EmissionHarmonic/Spurious: -50 dBc normal
Input Impedance5 kOhms (lavalier); 500 kOhms (instrument)
ControlsPower off/on, mute
Input ConnectorLocking 3.5 mm mini-jack
DisplayLCD/LED: Channel/frequency, battery status, mute LED
Antenna TypeExternal, attached
Battery Type2 x AA alkaline or NiMH
Battery Life8 to 10 hours typical, alkaline
ConstructionHousing: ABS plastic
Dimensions2.5 x 0.74 x 4.2" / 6.35 x 1.9 x 10.7 cm
Weight2.85 oz / 80.8 g (without batteries)
ElementBack-electret condenser
Output ConnectorLocking 3.5 mm mini-jack
Polar PatternUnidirectional
Frequency Response20 Hz to 20 kHz
Sensitivity-42 ±3 dB
Output Impedance1 kOhm ±5%
SPLMaximum: 130 dB
Power Supply1.5 to 10 VDC
Cable4.5' / 1.5 m
WiringGND= Pin 1, hot (+), pin 3, 2 kOhms, pin 2
Microphone Dimensions0.197" / 0.48 mm
Weight1.65 oz / 46.77 g
Packaging Info
Package Weight2.7 lb
Box Dimensions (LxWxH)14.1 x 11.9 x 2.9"
See any errors on this page? Let us know



Instead of using the supplied lavalier microphone, can I attach an ordinary dynamic microphone to the transmitter with an XLR to 3.5mm cable? Will it work?
Asked by: clyde
No it will not work. This transmitter requires using the 3.5mm locking connector along with the pin configuration that Nady uses. A lot of companies will use the same physical connector being the locking 1/8 connector, but the positive/negative/ground configuration may vary between manufacturers.
Answered by: Andrea O.
Date published: 2018-08-26
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