Telex Headphones HD 3A User Manual

HD-3A  
Dual-Sided Headset with 21dB NRR, Flexible Dynamic Boom Mic, & A4F Connector  
The HD-3A is a dual-sided monaural hearing protector type headset with noise-canceling dynamic micro-  
phone. EPA rated NRR of 21 dB. The polyurethane earcups house 150Ω dynamic elements and feature an  
easily adjustable headband. The 6’ cord is coiled for tangle-free use.  
Wiring Diagram  
 

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