Ascend

Superior Sound Quality

The Telex Ascend features automatically limited speaker output, high-bandwidth frequency response, and an advanced noise reduction system.

Modular Design

It’s easy to experience the unmatched flexibility of the Ascend. A simple procedure allows you to change the connector, remove the boom or add a battery.

FAA/TSO C139 Approved

The Telex Ascend has been meticulously designed and rigorously tested to meet the FAA TSO standards necessary for use in commercial aircraft.

Active Noise Reduction*

Ascend's advanced noise reduction system specifically targets common cockpit noises such as wind noise and avionics cooling fans. ANR can be powered by either mic bias or rechargeable battery module. *Available on ANR models only.

Multiple Applications

The Telex Ascend is ideal for use in the cockpit or the cabin. The highly flexible design enables users to swap connectors and use the same professional-grade headset for commercial flying or personal audio applications.

Three Year Warranty

The Ascend is covered by a full three-year warranty. The solid construction is designed to prevail through the thousands of hours of flying time that dedicated pilots endure.

Fold Flat Swivel Design

Ascend's unique chassis features pivoting earcups, ensuring a snug, custom-fit for the user. The earcups pivot a full 180°, enabling the headset to fold flat for compact storage.

Upgradeable

The Ascend can change as your requirements change. A two-plug version used in a business or commercial jet will work just as well as when converted to a single-plug version for an Airbus.

Versions Available

The Ascend is available in three different configurations: single-sided, dual-sided, and dual-sided with ANR (Active Noise Reduction).

Acoustic Quality	No spurious sounds with 10mW to speaker, 350Hz - 6kHz
Color	Black
Connector Flexibility	> 25000 cycles
Cord Flexibility	No damage when coiled
Cord Length	5.91 ft (1.8 m)
Drop Resistance	No failures after 12 drops from 1m onto concrete floor
FAA TSO Approvals	C139
Final Distortion	Meets mic and speaker distortion requirements after applicable environmental tests of DO-160 Receives power from boom microphone connection (microphone equipped versions only)
Headset/Handset Isolation	< 2 mV at mic with 10mW to speaker
Headsets & Handsets with Active Circuits	Meets speaker requirements with ANR on or off
Impedance at Plug	600 Ω ±20%
Insulation Resistance	> 10 MΩ between exposed materials and electrical circuit
Microphone Distortion	< 5 % @ 114dB SPL, 350Hz - 6kHz
Microphone Frequency Response	100Hz - 10kHz per DO-214
Microphone Sensitivity	-28 ±3dBV/Pa dBV/Pa @ 1kHz
Microphone Type	Noise-Cancelling Electret
Noise Level	< 1 mV RMS
Noise Reduction	≤ 12 dB
Overload	300 mW @ 1kHz, 8hr
Pullout Strength	> 22.05 lbs (10 kg)
Speaker	Dynamic
Speaker Distortion	< 10 % @ 110dB SPL, 350Hz - 3kHz
Speaker Frequency Response	± 6 dB 350Hz - 3kHz
Speaker Sensitivity	90 ±5dB SPL/mW standard volume setting
Weight	8 oz (226.8 g)
XLR Panel Power/Input Power	6 mA @28 Vdc