The EO3 from Nady is a professional wireless in-ear monitoring system that allows you to transmit audio to a performer at distances of up to 300'. The system consists of a compact base station transmitter and a lightweight beltpack receiver. The EO3 system is available in 8 separate preset channels in the 72-76MHz band.
The transmitter offers mic and line level inputs to accept a variety of sound sources. It can transmit to an unlimited number of receivers (extra receivers sold separately) and has an input gain control, plus an automatic level control function. It has an extendable antenna, plus LED indicators for visually monitoring the transmitter's status. It operates via the included 9VDC power supply adapter.
The compact beltpack receiver is lightweight and unobtrusive. It has a user-adjustable volume control, with the capability to provide up to 130dB of audio. Instead of a bulky external antenna, the receiver makes use of your connected earphone cord as the antenna. A pair of EB-3 earphones with soft rubber eartips is included. The receiver has an LED power indicator and operates on a single 9V battery.
Frequency Response: 100 Hz - 10KHz ± 3 dB
Signal to Noise Ratio: 60 dB
Total Harmonic Dist.: < 0.5%
RF Carrier Frequencies: Eight factory preset channels between 72-76 MHz.
Channel AA: 72.1, BB: 72.3, CC: 72.5, DD: 72.7, EE: 72.9, FF: 75.5, GG: 75.7,
Frequency Stability: Better than .005%
Modulation: FM ± 75 KHz
Operating Range: Up to 300 feet line of sight
Line Input: Connector: One 1/4 phone jack. Impedance: 100 K Ohms, unbalanced.
Mic Input: Connector: One 1/4 phone jack. Impedance: low impedance, unbalanced, with 9 VDC
at 1 mA for condenser mic.
Power Output: 80,000 μV @ 3 meters
Controls: Power On/Off, audio input gain adjust
Indicators: Power On LED, Audio Modulation TX LED
Antenna: Permanently mounted telescoping whip
Power Requirement: 9 VDC regulated, @ 200 mA, AC-EO3 adapter provided
Dimensions: 1.25" H, 8.25" W, 4.25" D (3.175 x 20.9 x 10.8 cm)
Weight: 18.2 oz. (500 g.)
Controls: Combination volume/on-off wheel
Audio Output: 100 mW max into 16 Ohms
Connectors: 3.5 mm mini jack for earbuds output
Earphones: Binaural EB-3 earbuds with optional-use EMI soft rubber inserts
Antenna: Integral with earbud cord
Indicators: LED power on indicator
Sensitivity: 2 μV for 12 dB Sinad with squelch defeated. Squelches at 10 μV for min. 50 dB S-N ratio
Mute Threshold: 8-10 μV
Power Requirement: 9V carbon zinc or alkaline battery
Battery Life: 17-20 hours with alkaline battery; 10-12 hours with carbon zinc battery
Dimensions: 3.35 H, 2.75 W, .75 D (8.5 x 6.5 x 2.25 cm)
Weight: 2.65 oz. without battery (73 g)