ELECTRONIC NOISE CANCELLING HEADSETS OWNERS MANUAL
SATISFACTION GUARANTEE The idea of a guarantee that a product will function in accordance with certain claims, and will be replaced or repaired if it fails to perform to those standards, has been popular for decades. In these times, most guarantees promise safeguards against failure over varying periods, and are worded such that proving fault with the manufacturer has become primarily the customer’s responsibility.
ELECTRONIC NOISE CANCELLATION DESCRIPTION & TECHNICAL INFORMATION: How it works. David Clark’s Electronic Noise Cancellation (ENC) headsets feature the latest advances in electronic noise cancellation technology. They’re specially designed for pilots of aircraft which generate noise at lower frequencies. Headsets relying on passive noise control methods alone cannot suppress low frequencies as effectively as mid and high range frequencies. Opposites protect.
ATTENUATION Passive versions of these headsets already exhibit excellent noise reduction ratings (NRR). Test measurements indicate an increase in attenuation at lower frequencies when ENC is switched on. At the present time there is no ANSI test standard for independent measuring of the effectiveness of Electronic Noise Cancellation. Fail-safe: An important product feature is true “fail-safe” operation.
OPERATION Electronic noise cancellation is an “electrical” process. Power to drive the circuitry is obtained from either the Portable Battery Power Module (models ending in “XL” or “X”) or the aircraft’s electrical system (models ending with “XP”). XL-9V GENERAL AVIATION PORTABLE BATTERY MODULE Instructions Introduction The model XL-9V battery pack uses a 9 volt alkaline battery to provide power to the headset ENC system.
To Enable Auto Shut Off The ENABLE position provides automatic shut off of power to the ENC system if the headset is unplugged or the aircraft audio system power is turned off. To operate the Auto Shut Off switch remove the battery, and using a small pointed tool gently move the switch to the desired position. Replace battery (see Fig. 1). Power Indicator A bi-color LED, mounted on the top of the battery pack indicates the status of the battery (see Fig. 2).
Battery Insertion and Removal CAUTION! Improper battery insertion may damage unit. To remove the battery compartment cover, press down lightly on the recess and slide the cover back. To install the battery compartment cover, align with the recess in the battery compartment and slide the cover forward until it snaps into position (see Fig. 3).
GENERAL AVIATION H-10 SERIES HEADSET Features: Headpad Assembly P/N 40688G-36 Headband Locknut When the headset is adjusted comfortably, the locknut can be tightened for consistent fit to your head. Undercut Comfort Gel Ear Seals P/N 40863G-02 Microphone Protector P/N 40062G-02 Exclusive, Patented Flex/Wire Boom Rotates for left or right side positioning. Detented for precise control. Wire slide allows easy, repeatable microphone placement. R Volume Controls Dual volume controls.
MILITARY H10-66XL SERIES HEADSET Features: Headband Locknut When the headset is adjusted comfortably, the locknut can be tightened for consistent fit to your head. Headpad Assembly P/N 18900G-48 High/Low Impedance Select Switch HIGH Undercut Comfort Gel Ear Seals P/N 40863G-02 LO W R Dynamic Microphone P/N 09168P-20 Exclusive, Patented Flex/Wire Boom Rotates for left or right side positioning. Detented for precise control. Wire slide allows easy, repeatable microphone placement.
MILITARY H10-76XL & H10-76XP (LOW IMPEDANCE ENC HEADSETS) Features: Headpad Assembly P/N 40688G-36 Headband Locknut When the headset is adjusted comfortably, the locknut can be tightened for consistent fit to your head. Undercut Comfort Gel Ear Seals P/N 40863G-02 Dynamic Microphone P/N 09168P-18 Exclusive, Patented Flex/Wire Boom Rotates for left or right side positioning. Detented for precise control. Wire slide allows easy, repeatable microphone placement.
ACCESSORIES – POWER OPTIONS ‘X’ Series modular design allows pilots the option of using one headset with either Portable Battery Powered Modules XL (with a communication cord required) or the Panel Mount Module XP (which is hard wired to the audio and power circuits of the aircraft). To further enhance your headset’s versatility, the following items may be purchased separately: General Aviation Portable Battery Pack Module XL-9V P/N 40862G-01 W1.9" x H3.2" x D1.
ACCESSORIES Undercut, Comfort-Gel Ear Seals Softer, more supple and form fitting with an “undercut” shape that provides more room for your ears. The larger, yet lighter, ear seals cradle the ears with unsurpassed comfort. Compatible with all David Clark Company headsets. P/N 40863G-02 (1pair) NSN 5965-01-516-8082 Microphone Protector Cloth mic-muff with drawstring. Protects microphone from moisture. Fits all microphones.
MAINTENANCE AND CLEANING For your headset to perform properly, always comply with the following: 1. Never alter or modify your headset. If you re-form the headband or muff, cut or punch holes in the ear seal, drill or punch holes in the ear cup insert, paint or coat the device, you will seriously jeopardize the hearing protection it affords and hearing damage could occur. 2.
CUSTOMER SERVICE Thank you for purchasing our product. David Clark Company makes every effort to prevent problems and the need for repairs. Still, if you do experience a problem with your David Clark product, qualified representatives are on hand to answer your questions and provide the best Customer Service in the industry. Many repairs are covered by the David Clark 5-Year Warranty. Simply return the product to the following address for evaluation and service: David Clark Company Inc.
