David Clark X11 Headset - Panel Powered Headset|SkyGeek.com

Calling all pilots of single-engine aircraft with a 6-pin jack (or if you don't have the 6-pin jack you can purchase the David Clark X11P Panel Mount Adaptor Cord)...

Are you looking for a comfortable panel-mounted headset for those long hours in the cockpit! The lightweight and stylish X11 is the latest breakthrough in a long line of quality aviation headsets by David Clark.

Owing to its innovative construction, the X11 is lighweight with a nice gentle clamping force, which makes it easy on your head during hours in the sky. This headset is effective at mitigating engine and prop noise due to the advanced electronic noise reduction feature.

But that's not everything, there are more good things to share about this headset! How about comfortable asymmetrical ear cups that get larger toward the lower back where your skull recedes and a cell phone interface built right into the headset? You also get a selectable stereo or mono output, dual-adjustable earcups, and a handy auto-turnoff function to ensure long battery life.

With its easily adjustable headband and those comfy low-profile earcups, the X11 is surely a good investment choice for both pilots and passengers.

A great accessory to get with this headset if you wear glasses or sunglasses is the David Clark Stop Gap Eyeglass Temple Cushion to keep your ear seals tightly sealed against your head.

Powering the Model X11P (Permanent Panel Mount) Unit Power the unit by turning the DC Power ON/OFF switch to the ‘ON’ position (See Fig. 2). Solid Green Light: indicates ENC is activated and battery capacity is fine. For Model X11P, LED light stays solid green (no flashing) when power is ‘ON’. Flashing Red Light: indicates power low and batteries in need of replacement. Approximately two (2) hours remaining. Note: Be sure that the autoshutoff feature in the battery compartment of the control unit is switched to the ‘ENABLED’ position (See Fig. 2) when operating from the Permanent Panel Mount (Model X11P) to prevent battery drain once the aircraft power is turned off.

David Clark X11 Series Control Unit Features Fail-Safe Microphone. If batteries are dead or the unit is turned off, microphone will function when connected to aircraft intercom. The X11 headset is shipped with the Auto Shutoff feature disabled. In this mode, the headset will function whenever the 'ON/OFF' switch is set to 'ON'. Auto Shutoff can be enabled via a small switch located under the batteries The LED will flash GREEN (solid GREEN  for Panel mount) or RED when headset is activated in ENC mode All features continue to function in auto shut-off mode under the following conditions         - Headset is connected to the aircraft intercom OR         - Cell phone is connected and active   3.  Auxiliary Audio (Interface to cell phone or stereo source) Control Unit features a 3.5mm, 4-contact jack to accept external audio inputs          Note: Always attach Gray connector to the Control Unit and Black connector to Audio Source. -  A Choice of any of the three provided custom cords allows interface to standard stereo sources (MP3, IPOD or CD players) and cell phones.          Note: Volume must be adjusted by external audio source and is NOT controlled by volume controls on headset. -   Cell phone interface via standard 2.5mm, 3-contact, stereo plug (right angle) OR 2.5mm, 4-contact plug (right angle). (See cell phone operating instructions to select the appropriate cable for your phone.) Cell phone audio is supplied to both ear-phones, independent of stereo/mono select switch on control unit.   4.  External Audio Management Aux/stereo audio is muted upon receipt of comm. audio to ensure integrity and clarity of voice communications. Any voice on the intercom will cause external audio to mute during the conversation and approximately 1-2 seconds upon conclusion of the conversation.   5.  Cell Phone Interface Cell phone conversation does not mute during receipt of Comm. Audio. All intercom parties hear cell phone outbound audio but cell phone recipient's voice is heard only by the headset connected to the cell phone. Sidetone is present when connected to aircraft intercom. Sidetone may not be (dependent on cell phone functionality present when using the headset and cell phone when not attached to the aircraft intercom.   6.  X11 Series headsets are shipped with auto-shutoff in the 'DISABLED' position. For battery power (X11 Model) operation, switching the auto-shutoff to the 'ENABLED' position will shut down the control unit if ENC power is accidentally left 'ON' after flight to prevent battery power drain. For permanent panel mount (X11P Model) operation, the auto-shutoff should be switched to the 'ENABLED' position to prevent battery power drain after the aircraft power has been turned off.

Why would you want Electronic Noise Cancellation? Communication headsets used in high noise conditions are typically of the circumaural type. A rigid cup encloses the ear, and a cushion seals the cup to the side of the head. These headsets passively attenuate noise by isolation. Hearing protection is provided by a rigid wall between the ear and the noise. In a carefully designed headset this passive attenuation is very effective at reducing a broad spectrum of audio noise, but it does not achieve high attenuation for low frequencies (e.g. below 200 Hz). This is unfortunate because many aircraft, especially helicopters, generate very high sound levels at low frequencies. In response to these conditions David Clark Company developed the Electronic Noise Canceling Headset System. (ENC) How does Electronic Noise Cancellation work? Active reduction of unwanted noise is achieved by a process which amounts to cancellation of the noise by generating a signal identical in sound pressure level (SPL) but exactly reversed in phase to the offending noise; the effect being a cancellation. This is accomplished in the following manner: A miniature microphone is placed in the ear cup next to the earphone element and as near as possible to the entrance of the ear canal. This microphone senses the noise as it enters the ear. The signal developed by the sensing microphone represents noise which has penetrated the passive attenuation barrier, and is composed of predominantly low frequencies. This signal is fed to a circuit where it is inverted in phase, amplified, and then drives an earphone creating an anti-noise signal which cancels the intruding noise. This is a type of feedback control system. An important feature of the product, exclusive to our design, is true "fail-safe" operation. By having dual earphone drivers, which are electronically independent, no interruption of communication can result from failure of the ENC system or its power source. David Clark's ENC Headset System is manufactured to the same high standards as our conventional headsets. Superior passive attenuation is combined with state of the art electronic noise cancellation in a product providing exceptional communication clarity.

• What are the new features of the X11?

There are many but some of the main features include it’s low-force suspension assembly for lightweight comfort, powered by 2 AA Batteries (avg. 30 hrs.) with auto shut-off, Cell Phone/Aux. Music input, super- soft fabric faced contoured gel ear seals, streamlined low-profile vented head pad and a modern design allowing compact storage in a uniquely designed DC Headset Bag.

• I'm experiencing some unwanted noise. What can I do?

The most common cause of this complaint has proven to be improper ear seal positioning. Unlike most other David Clark products, the contoured ear seals on the X11 are left/right specific. Therefore, if you rotate the microphone boom 180 degrees to accommodate your preference, it will be necessary to also switch your ear seals from side to side. This will insure proper sealing and reduce to possibility of unsatisfactory performance.

• How much does the X11 weigh?

The X11 Headset weighs in at just 12 ounces.

• What is the Warranty?

The X11 like all David Clark Aviation Headsets comes with a 5 year warranty.

• Is the X11 compatible with passive headsets being used in the same aircraft?

Yes, the X11 is compatible and will not create any degradation in communication.

• What is the noise cancellation performance of the X11?

The X11 has appreciable passive attenuation and exceptional electronic noise cancellation (17-22dB) that has been verified through extensive flight testing in numerous fixed wing aircraft. The X11's performance is also backed by our 30 Day Money Back Guarantee.

• What will happen if I lose battery power?

An important feature of the X11 ENC Technology is it’s true “fail-safe”
operation. Dual voice coils are electronically independent so that no interruption of communication can result from failure of the ENC system or it’s power source.
(Note: Cell Phone/Aux input features will not operate without battery power)

• What spare parts are available for the X11?

Super-Lightweight Head Pad
Soft Fabric-Faced Contoured Gel Ear Seals
M-77 Microphone
Foam Microphone Protector

• How can I adapt the X11 to a Motorola Razr?

You will need to adapt the USB-like connector on the Razr to a 2.5mm jack, then use the David Clark supplied 2.5mm cord to connect it to the headset. There are adapters available from third party vendors at the following links. (Note: Use at your own risk. David Clark Company does not warrant or guarantee these products and will not be responsible for their function or any damage incurred through their use.)

• What direction do I turn the Volume Controls?

Since the boom assembly can rotate 180 degrees, it enables you to plug in without having the cord cross in front of you during the flight... When the headset is on your head and the mic./boom assembly and comm. cord are on your left side (typical pilot position in left seat) you rotate both controls forward to increase volume... If you are seated in the right seat (co-pilot or passenger in right seat) and the mic./boom assembly and comm. cord is on your right side then the opposite applies... Rotate the  controls back to increase volume. note:  If you switch the boom from side to side, be sure to switch the contoured ear seals at the same time to maintain optimum ENC performance.

• Is the X11 Headset TSO/FAA approved?  

The approval process is underway and is expected to be approved during the first quarter of 2007. Please check back for updates.

David Clark Company Incorporated, 360 Franklin St., Box 15054, Worcester, MA 01615-0054 warrants this product to be free from defects in material and workmanship under normal and proper use, for the period of FIVE YEARS from the date of original purchase and agrees, at its option, to repair or replace such parts showing factory defects subject to the following provisions: If a defective product or part cannot reasonably be repaired or replaced, David Clark Company Incorporated will refund its purchase price. This warranty applies only to a new product which has been sold through authorized channels of distribution. The purchaser voids the warranty if he or others not authorized by David Clark Company Incorporated attempt to repair or service the unit, or if any parts not supplied by David Clark Company Incorporated are inserted in the unit. Defective products or parts must be returned to the above address prepaid. THE FOREGOING IS YOUR SOLE REMEDY FOR FAILURE IN SERVICE OR DEFECT, DAVID CLARK COMPANY INCORPORATED SHALL NOT BE LIABLE UNDER THIS OR ANY IMPLIED WARRANTY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. This warranty is in lieu of all other warranties, express or implied, INCLUDING THE WARRANTY OR MERCHANTABILITY OR FITNESS FOR USE, WHICH WARRANTIES ARE HEREBY EXCLUDED. To the extent that this exclusion is not legally enforceable, the duration of implied warrants shall be limited to one year from the date of purchase. No suit for breach of express or implied warranty may be brought after one year from the date of purchase. Some states do not allow limitations on how long an implied warranty lasts, and some states do not allow the exclusion or limitation of incidental or consequential damages and the exclusion of implied warranties may not be legally enforceable, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights and you may have other rights which vary from state to state.