Bose® Aviation Headset Series II Owner's Guide
Operational Advisories As with any complex electronic device, it is possible for this headset to experience a failure during operation. Such a failure may include loud tones, distortion and loss of communications signal in the headset when used in the active or “on” position. The system is “on” when the rocker switch is “up”. Note: This failure could prevent continued use of the headset in the “on” position.
Operational Advisories This headset meets or exceeds all requirements of EN352-4, 1996 (European Standard-Hearing Protectors-Safety Requirements and Testing-Part 4: Level-Dependent Ear Muffs). • The wearer should ensure that: i. The ear muffs are fitted, adjusted, and maintained in accordance with the manufacturer’s instructions. ii. The ear muffs are worn at all times in noisy surroundings. iii. The ear muffs are regularly inspected for serviceability.
Operational Advisories Declaration of Conformity We, the offerer: ® Bose Corporation, The Mountain, Framingham, MA 01701-9168 USA acknowledge our sole responsibility, that the product: Kind of equipment: Headset Type designation: Bose Aviation Headset Series II in accordance with EMC Directive 89/336/EEC and Article 10(1) of the Directive, is in compliance with the following norms: Technical regulations: Electromagnetic Compatibility Emissions Electromagnetic Compatibility Susceptibility EN55011, EN5
Contents Operational Advisories ............................................................ 2 Introduction ............................................................................. 6 Description ....................................................................... 6 Warranty card ................................................................... 6 Using the Bose® Aviation Headset ........................................... 7 For proper headset fit ....................................................
Introduction Description Congratulations on your purchase of the Bose® Aviation Headset Series II. This headset uses an advanced combination of electro-acoustical noise reduction circuitry and a patented cushioning system to significantly reduce aircraft noise. It actively reduces noise elements in addition to muffling noise. The patented Clear ComfortTM cushions require only slight pressure to provide high passive noise attenuation. As a result, this headset can be worn comfortably for extended periods.
Using the Bose® Aviation Headset For proper headset fit Note: The headset must be worn with the Bose logo (located on the earcups) facing forward. To achieve comfort and good performance, adjust both sides of the headband equally to provide a comfortable fit. To achieve a good seal, lightly grasp both earcups and position them so that your ears are completely inside the Clear ComfortTM cushions.
Using the Bose® Aviation Headset Interconnect plug The headset interconnect plug connects the headset cable to a power source. The power source can be an installed connector in the aircraft’s control panel or an adapter cable connected to a portable battery pack. The interconnect plug is designed for quick connection and removal. To ensure correct pin alignment, the plug has a keyway. Note: The illustrations below show the insertion of the headset interconnect plug into the adapter cable.
Using the Bose® Aviation Headset Adjusting the volume The volume for your headset is controlled by the grooved knobs located on the front side of the headband arms. Avoid setting your volume controls at high levels that may affect your hearing during extended periods of headset use. Note: The volume controls and the active noise reducing circuitry work only when the headset is turned on (Figure 6). Note: The volume cannot be turned off completely.
Using the Bose® Aviation Headset Microphone boom relocation To suit your flying preference, the headset boom can easily be moved from one earcup to the other. 1. Unscrew the retaining knob on the boom mic mount. 2. Unplug the mic cable from the headband arm. Figure 7 Unplugging the mic cable 3. Find the crescent-shaped flanges on the top and bottom of the boom’s attachment clip (Figure 8). The clip fits snugly on the earcup when the flanges face the earcup’s outer side.
Using the Bose® Aviation Headset 4. Plug the mic cable into the headband arm. You may want to use the adjustment screw to tighten the tension of the clip on the boom mic. The adjustment screw is on the flat end of the clip. Use a 3⁄32 in. hex wrench to tighten it. Do not over-tighten. Experience in using the headset helps establish your sense of how it should sound. If you notice a problem, refer to “In Case of Difficulty” (page 20).
Using the Bose® Aviation Headset Powering the headset The Bose Aviation Headset Series II may be powered in one of two ways: a portable battery pack, or a connector installed into the aircraft’s instrument panel. Portable battery pack The portable battery pack is available in two versions: NICAD rechargeable and alkaline.
Using the Bose® Aviation Headset Inserting batteries into the alkaline battery pack 1 2 3 4 5 Spin the batteries once with thumb to seat them securely.
Using the Bose® Aviation Headset 7 8 9 10 11 12 Click Click 14
Using the Bose® Aviation Headset Installed connector An optional installed connector is available for pilots who want to hardwire the DC power, incoming audio, and outgoing microphone functions permanently into their plane. The panel mount receptacle comes wired with a 6 foot harness to simplify the installation process. To order this connector, contact the Bose Aviation Headset Service Department (page 23). The Bose Aviation Headset Series II uses a self-latching, precision designed quick connector.
Using the Bose® Aviation Headset 5. Approved adhesives for use with this connector are Ciba-Geigy Uralane 5754A/B, Lord 710, or VTCS-6 Vibratite. Do not let any cyanoacrylate-based adhesives (e.g., Loctite), flux remover, or other caustic compounds come into contact with the installed connector body. These chemicals will cause deterioration and/or irreparable damage to the connector. For information on chemical compatibility and connector part number, contact LEMO USA, Santa Rosa, CA at 1-800-444-5366.
Using the Bose® Aviation Headset Installed DC power connector An optional installed connector is available for pilots who want to use their plane’s DC power, instead of the battery pack, with the portable adapter cable. The connector’s small size allows it to be installed in a convenient location in the control panel, for example, near the headphone and mic jacks.
Care and Maintenance Cleaning instructions Clean the headset exterior and cushions by wiping them with a moist cloth. Mild soap may be used. CAUTION: Do not immerse the headset in water. The headband cover is made from leather and sheepskin. If it becomes soiled, it may be removed and cleaned using mild soap. To remove the headband cover, peel apart the hook and loop fastener along the flap.
Care and Maintenance To install a new foam liner Note: The left and right foam liners are different. 1. Lift the old foam liner out of the earcup. 2. Place the new foam liner in the earcup. With the correct foam liner in place, nesting along the walls of the cavity, its half-moon shaped opening should cover the microphone, and the small opening in the foam liner should fit over the small hole.
In Case of Difficulty Problem What to do Communication but no active noise reduction in both ears. • Make sure that your headset is powered, and that the power switch is “ON.” • If using DC power from the aircraft, check the aircraft fuse or breaker. • If using the NICAD battery pack, verify that it is charged. • If using the alkaline battery pack, verify that: – batteries are installed with the correct polarity.
Technical Information Sound pressure levels (SPL) are relative to 20 micro Pascal. Earphones Damage could occur to avionics equipment if it was manufactured for use only with 600Ω (ohm) headsets. If in doubt, consult the avionics equipment manufacturer. Impedance In mono mode: 480Ω (on) and 190Ω (off) at 1kHz. In stereo mode: left, 500Ω (on), 190Ω (off); right, 2000Ω (on), 190Ω (off).
Technical Information Headset Weight 22 oz. (567 grams) Temperature and Altitude (Category A1) Operating Temperature: +5° to +131° F (-15° to +55° C) Storage Temperature: -67° to +158° F (-55° to +70° C) Altitude: 15,000 ft. maximum pressure altitude for full cancellation The Bose® Aviation Headset Series II headset, adapter cables, battery packs, and boom microphone are FAA approved to TSO c-57a and c-58a.
Service and Warranty Information Service Bose® Aviation Headset Service Department 145 Pennsylvania Avenue Framingham, MA 01701-9168 U.S.A. TEL: FAX: 1-800-233-4416 (U.S.) 1-508-879-7330, ext. 62006 (outside U.S.) 1-508-820-3465 Contact the Bose Aviation Headset Service Department for: • accessories. • technical advice. • installation information. • warranty and repair information. If your headset must be returned for service: 1.
Service and Warranty Information Limited warranty Bose product ® What is covered All parts defective in material or workmanship. For how long At least one year from the purchase date, or longer if specified in your owner’s manual, but not longer than five years from the purchase date. What we will do We will, at our sole option, repair or replace any defective parts free of charge. What we will not do Pay shipping or transportation charges from you to us. What you must do 1.
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© 1997 Bose Corporation The Mountain, Framingham, MA 01701-9168 USA JN97884 PN183953 Rev. 01 AM183953 Rev.
