Lightspeed Delta Zulu 4074 Headset w/GA Dual Plugs

Part Number
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The latest generation of Zulu headsets from Lightspeed, with features to improve hearing acuity, carbon monoxide sensors, and of course really great noise canceling and attenuation!

From the manufacturer:

Delta Zulu is built for your mission with safety, control, and comfort in mind.
With a built-in sensor and personalized alerts, Delta Zulu delivers what you need to greatly enhance your safety. This next generation is built on a new technology platform that will extend your limits into a whole new era of piloting safety.
Delta Zulu offers a revolutionary digital platform and groundbreaking technologies that could save the lives of pilots and their passengers.
Featuring Kanari™ smart alert technology with built-in carbon monoxide detection, Delta Zulu can help sharpen your situational awareness and give you peak control of essential inflight safety. Plus, our new HearingEQity™ technology adjusts your headset to your individual hearing profile for crystal clear flight communication.


Lightspeed’s designers and engineers collaborated with a team of highly qualified flight and safety experts to develop a revolutionary digital platform and groundbreaking new technologies to make flying safer.

The CO sensor built right into
the headset provides protection
by measuring cabin carbon monoxide levels, helping to keep you and your passengers alert and safe with audible warnings.
The free Lightspeed app allows you to check the CO sensor data visually during flight, and review your full history later.


Delta Zulu introduces a built-in audio equalization system called HearingEQity™ that ensures crystal clear flight communication. Through an automated 12-frequency hearing test that can be taken through the Lightspeed app, HearingEQity sets the hearing level in each ear of your headset to create your individual hearing profile and compensates for any hearing variations between ears.
The Lightspeed App allows you to record radio conversations, playback transmissions, draw diagrams, and archive flight recordings for post-flight
briefing and training.
Delta Zulu is the first headset to
adopt the UAC plug
, allowing you
to connect to other devices directly from the headset for charging, data communications, and auxiliary audio.


The legendary Zulu comfort and durability continues in the Delta Zulu. Performance ear seals, optional taller head pads for a variable fit, sturdy cables built around a Kevlar core, full Bluetooth integration, and an industry-best 7-year warranty, are still standard in this newest model.

A Revolutionary New Digital Platform —Integrating a wide array of new and existing technologies into a new and entirelydigital platform, Delta Zulu is part of a new generation of ANR headset capabilities.
These integrated technologies include:

Built-in carbon monoxide sensor
Always on and always monitoring cabin
carbon monoxide, the new CO sensor is
optimally calibrated to provide audible and
visual warnings at specific pre-defined CO

HearingEQity for custom sound Based
on results from a custom 12-frequency
hearing test in the new Lightspeed app,
HearingEQity automatically adjusts Delta
Zulu to optimize every ATC call and
conversation specifically for your individual
hearing profile. Individualized profiles can
be saved, and different headset users can
switch profiles.

Changeable battery packs Easy-toreplace battery packs give you the option of using rechargeable lithium-ion batteries or AA batteries.

The Lightspeed App Allows you to
check sensor data visually during flight,
supplying you with instantaneous readouts
and historical data. Review safety metrics
from prior flights, record conversations,
playback transmissions, draw diagrams, and
archive flight recordings onto your phone
or mobile device for post-flight briefing
and training.

Bluetooth® — Bluetooth wireless
technology with A2DP technology enables
cell phone communications and stereo
music streaming.

Low-profile comfort Weighing just 14.9
ounces (including ear seals, head pad and
mic boom), Delta Zulu has a low-profile,
stainless-steel headband that follows the
curve of the head for more comfortable
distribution of weight and side pressure.

High-performance fit — Delta Zulu’s
tapered performance ear seals are
designed to hug the curve of the jaw for
a natural fit, increasing comfort and clarity
while also providing a better seal around

eyeglass or sunglass frames. Cup cavities
allow the entire ear to fit comfortably
inside. We also offer taller head pads for
a variable fit at no extra charge to ensure
maximum comfort and performance.

UAC plug Delta Zulu is the first headset
to adopt the UAC plug, allowing you to
connect to other devices directly from the
headset for two way direction of charging,
audio, and data transmissions. Delta Zulu
has options for 4 cable configurations,
from UAC to USB-A, USB-C, 3.5 mm and
Lightning plugs.
Included accessories Carrying case,
single port wall charger, lithium-ion battery
cartridge, AA battery cartridge, UAC to
USB-A cable, a cord shirt clip, and a set
of personalized icon chips to distinguish
multiple Delta Zulu headsets.

Available configurations Dual GA,
LEMO panel power, U-174. Others available
by special order. Please contact Customer
Support if your configuration is not listed.

Other Standard Features As with all
Lightspeed ANR headsets, our models
come with a promise of durability and
longevity, superior quiet, clear comms, 60-
day money-back guarantee, ComPriority

and Auto Shutoff. The family of Zulu
products also come with a 7-year limited



Technical Specifications


Weight: 14.9 oz (including ear seals and mic boom)
Battery power supply: two AA alkaline or rechargeable lithium ion batteries
Headset Plug Type: Dual GA, LEMO panel power, U-174 Panel aircraft 8-40 VDC
Headphone Transducer: 40mm moving coil
Frequency response: 20 Hz-20 kHz
Nominal impedance @ 1 kHz:
OFF—Mono: 275 ohms, ON—Mono: 295 ohms
OFF—Stereo: 575 ohms, ON—Stereo: 590 ohms


Transducer principle: Noise-canceling electret
Frequency response: 200 Hz-6000 Hz
Maximum SPL: 114 dB
Terminating impedance: 220–2200 ohms
Operating voltage: 8V-16V DC

Bluetooth Enabled Phone


Bluetooth Streaming Music


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