New in the Sennheiser HMEC-466:

• Built in music (MP3, DVD, iPOD) and cell phone interface. The audio will automatically fade when there is a transmission.
• The set can also be used as standard headphones - one can just switch off the NoiseGard feature and enjoy!
• The ultra-cushioned headband has 30% less caliper pressure than its predecessor, meaning the set will rest more comfortably around your head.
• The new extremely soft leatherette earpads add to the comfy feel
• The new silver-brushed surface gives the set a sleeker, more exclusive look.
• Individual volume controls for each ear.
• 10 Year Warranty

The HMEC-466 is the exact same as the Sennheiser HMEC-460 except that it only has a 6-pin Redel Connector (sometimes refered to as a Bose connector).  This does NOT have an XLR-3 connector or standard dual plugs.  In order to use the HMEC-466 you must own an aircraft that has already been wired by an avionics shop with a 6-pin Redel connector.  If you do not have a Redel connector, we recommend the Sennheiser HMEC-461 instead.  

Experience excellent noise attenuation over the entire frequency range. The HMEC 466 NoiseGard(TM) ensures superior speech intelligibility and voice transmission - even in the loudest of surroundings. The Sennheiser HMEC 466 is a wonderful lightweight addition to the class of Active Noise Canceling Headsets. Utilizing Sennheisers state of the art fidelity speakers and microphone, the HMEC 466 creates an extremely comfortable flying experience with the ultimate in hearing protection and comfort. The HMEC 466 also carries an unbelievable 10 year warranty! The HMEC 466 can achieve up to 40db of total hearing protection. You have to try them to believe it. The HMEC 466 weighs in at just 14.4 oz!

This lightweight headset is fitted with a volume control for the headphones, flexible boom microphone, collapsible leatherette cushioned headband, leatherette ear seals, mono/stereo switch and the on/off switch for NoiseGard(TM) circuitry. With ease of use and optimum comfort in mind.

Features:

• Built in music (MP3, DVD, iPOD) and cell phone interface. The audio will automatically fade when there is a transmission.
• Constant attenuation of up to 40 dB throughout the entire audio range
• Advanced transducer design ensures excellent speech intelligibility
• Electronics fully integrated into headphone capsules
• Can be used as conventional headphones when supply voltage is switched off
• Noise-compensated boom microphone for superior speech transmissions
• Volume control
• Mono/stereo switch
• 6-pin Redel connector for panel power (aircraft must be wired!)
• Flexible boom microphone for right or left side use
• High-quality carrying bag
• Leatherette ear seals
• Leatherette headpad
• 10 Year Warranty!

Technical Data - Headphones
Transducer: dynamic, closed, circumaural
Frequency response: 45 - 15,000 Hz
Nominal impedance active/passive:  160/150 ohms mono 320/300 ohms per system, stereo
Attenuation (active and passive): > 25 - 40 dB
Max. SPL: 118 dB linear
Caliper pressure approx.: 10 N

Technical Data - Microphone with Preamplifier
Type: MKE 45-1
Transducer: electret, noise-compensated
Frequency response: 300 - 5,000 Hz
Max. SPL: 120 dB (distortion < 5 %)
Output voltage: 400 mV +- 3 dB at 114 dB/SPL (as per RTCA/DO-214)
Min. terminating impedance: 150 ohms
Operating voltage:  typ. 16 V DC (8-16 V DC, 8-25 mA) as per RTCA/DO-214