Nady Systems Headphones HM 20U User Manual

USER  
HM-20U Headmic™  
GUIDE  
Congratulations on purchasing the NADY HM-20U miniature uni-directional condenser  
headset microphone. Optimally designed for singing and speaking applications,  
even in noisy environments. Its small, lightweight design makes it ideal for hands-  
free use with minimum visibility. Perfect for singer-musicians (drummers,  
keyboardists), vocal/dance performers, DJ's, television announcers, public  
speakers, and aerobics instructors.  
STANDARD ITEMS SUPPLIED  
• HM-20U unidirectional headmic with small foam windscreen  
• Additional foam windscreen  
• Extra boom assembly  
• User guide and Warranty card  
OPTIONAL ACCESSORIES  
• XM-10  
5V-10V DC)  
Mini-XLR to XLR phantom power adapter (converts 48V phantom power to  
• HM-CC1 — Plastic headmic carrying case  
FEATURES  
• Full-frequency, uni-directional electret condenser mic  
• Warm, transparent audio and maximum feedback rejection  
• Durable, thin metal frame easily molded to any user  
• Ergonomic design and comfortable fit with or without glasses, hat, or headphones  
(also no hairstyle hindrance)  
• Tiny 5 x 8 mm lightweight capsule for hours of comfortable use  
Two sizes of foam windscreen included to reduce wind/popping noise  
• Extendable, fully adjustable boom for optimum mic capsule placement  
• Available with mini-XLR, 3.5mm phono plug (fits most standard wireless bodypack  
transmitters) or with standard XLR adapter for all wired and wireless applications  
• Choice of black or beige  
SPECIFICATIONS  
Element: Back electret condenser  
Polar pattern: Uni-directional cardioid  
Frequency Response: 20Hz~20KHz  
Sensitivity: -46dB 3dB  
Output impedance: 1K Ohms 5%  
SPL max: 135dB  
Power Supply: 1.5-12V DC  
Capsule: 5x8mm  
Cable: 1.5mm dia, 1M (40")  
Weight: 0.6 oz. (18g)  
Output connector: 3.5mm mini-locking plug or 3pin mini-XLR  
connector  
Mini-XLR Wiring: GND = Pin 1, Hot (+) = Pin 3 --> 2K Ohms --  
> Pin 2  
3.5mm Plug Wiring: GND = Sleeve, Hot (+) = Tip Foam  
windscreen and extra boom assembly included  
USE & CARE  
The headset’s arch-shaped rests are placed over each ear and the remainder of the band  
extends around the back of the head just above the neck. The tip of the supporting arches  
rests on the temple just in front of the ear providing the necessary stability during use. The  
mic boom descends from the ear on the left side.  
Specifications and design subject to change for improvement  
purposes without prior notice.  
Carefully loosen the boom by unscrewing the assembly one-quarter turn. Place the  
microphone capsule close to the mouth to a favorable audio position. Tighten the boom  
assembly. Bend the boom and headset slightly for optimum fit.  
FREQUENCY RESPONSE &  
POLAR PATTERN  
Connect the Mini-XLR or 3.5mm phono plug of the microphone cable to the input jack of  
the bodypack transmitter or XM-10 phantom power adapter. When using a phantom power  
adapter, connect it to the microphone input of an audio preamp that provides phantom  
power.  
The entire HM-20U assembly has been moisture-proofed to guard against deterioration  
during use. After use in a high moisture application such as aerobics or a stage  
performance, remove the foam screen, wipe the headset with a dry soft cloth and permit it  
to air-dry. Do not store the unit in a closed space (e.g., a plastic bag) until all moisture has  
evaporated, and avoid conditions of extremely high humidity. This will help maintain the  
HM-20U’s excellent performance. While the HM-20U is not unusually sensitive to the  
outside environment, extremes in temperature can be harmful. Avoid, for example, leaving  
the microphone in direct sunlight for long periods of time.  
-40  
-50  
-60  
-70  
-80  
-90  
-100  
-110  
-120  
50  
100  
200  
500  
1k  
2k  
5k  
10k  
20k  
[Hz]  
SERVICE FOR YOUR NADY AUDIO PRODUCT  
(U.S.) Should your NADY AUDIO product require service, please contact the Nady  
Service Department via telephone at (510) 652-2411, or e-mail to service@nady.com.  
NADY SYSTEMS, Inc.  
6701 Shellmound Street • Emeryville, CA 94608  
Phone: 510.652.2411 • Fax: 510.652.5075  
(International) For service, please contact the NADY AUDIO distributor in your country  
through the dealer from whom you purchased this product.  
 

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