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The compact HE-1 is a sure-fi re bet 
for quick and easy removal of 60/120 
cycle AC hum from your signal path. 
This two channel mini-box is designed 
to eliminate hum caused by ground 
loops while also acting as a direct box capable of converting unbalanced signals 
to true balanced signals for long interference-free cable runs.  It’s passive design 
is easily portable with no AC sockets necessary. A couple of these are essential 
hardware in every musician’s or roadie’s tool bag.

• Eliminates AC hum (60Hz/120Hz buzz) easily with up to 20dB of attenu-

ation 

• Breaks grounds loops safely, while leaving all signal grounds intact 
• Dual Channel I/O with 1/4” TRS jacks 
• Converts automatically back and forth between balanced and unbalanced 

lines at either end 

• Completely passive design with audiophile quality components assures the 

best possible noise and distortion-free performance

SPECIFICATIONS

Input Connectors ................................................................... 2 x 1/4” TRS jacks 
Output Connectors ................................................................ 2 x 1/4” TRS jacks
Input/Output Impedance ............................................................................10K

Ω

Maximum input .....................................................................................

Maximum input

Maximum input

8V RMS

Maximum source impedance .......................................................................1K

Ω

Minimum load impedance .........................................................................10K

Ω

Frequency response ..................................................20HZ to > 20kHz (- .05dB)
Dimensions (WxHxD) .................4.5” x 1.63” x 3.5” (114.3 x 41.4 x 88.9 mm)
Weight .............................................................................................

Weight

Weight

16 oz (453g)

SERVICE

(U.S.)

 Should your Nady HE-1 Hum Eliminator require service, please contact 

the Nady Customer Service Department via telephone: (510) 652-2411 or e-
mail: [email protected].

(INTERNATIONAL)

 For service, please contact the Nady distributor in your 

country through the dealer from whom you purchased this product.
The warranty card supplied with this system provides valuable warranty and 
service information. Store it in a safe place for future reference. Do not attempt 
to service this unit yourself as it will void your warranty.

HE-1

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HUM ELIMINATOR

NADY SYSTEMS, Inc.

6701 Shellmound Street • Emeryville, CA 94608 
Tel: 510.652.2411 • Fax: 510.652.5075 • www.nady.com

USER GUIDE

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