Frequency: 2. 4 GHz
Input power: 7.4-volt 2,000 mAh Li-Ion
Display: 192 x 96 backlit LCD
Number of channels: 9
Frame rate: 11 or 22 ms
Run time: Up to 10 hours
• Nine fully proportional channels.
• User-configurable switch and stick
• Voice alerts—transmitter can speak to
the user in five languages.
• Wireless trainer system with model
match—instructors can work with
multiple students without having to
rebind to each student’s transmitter.
• Transmitter stores as many as 250
models and populates the model
list only with models the user has
• Direct system menu access—it
is unnecessary to power off the
transmitter to access the key system
• SD card support for backing up files,
BNF setups, and firmware updates.
• Spektrum DX9 transmitter
• Global power supply
• 2,000 mAh Li-Ion transmitter battery
• 128 MB SD card
• Neck strap
• Decal sheet
• Voice alerts and notifications.
• Model setup files can be downloaded
• Intuitive programming.
• Several telemetry options.
• Swappable and assignable switches.
• Included Li-Ion battery can be charged
in the radio.
• Receiver not included.
AT A GLANCE ... The first time my radio spoke to me
was during the bind
process. It told me
it was binding, the
protocol (DSM2 or
DSMX), the frame
rate ( 11 or 22 ms),
and when binding
time was during
when I set up
sound events such
as different rates. I
the timer on the
Edge for 5 minutes
mode with a
at every minute,
when 30 seconds
remained, and for
a countdown at 10
seconds. I wanted
the radio to do a lot
of talking while I
was at the field.
On my first
radio test, I was
the only one on
the flightline and
when the female
voice alerted me
that I had 4 minutes
actually startled me.
were quiet and I
was focused on
aerobatic flying. I
wasn’t bothered by
the alerts after that,
but it is something
to remember the
first time you use
Voice alerts are
available in the
System menu to
warn the pilot
such as the throttle
stick not being at its
lowest position, or
the retract switch being set to up. The Spoken Flight Mode
Setup is also in the System menu. This allows you to assign
custom names to the Flight Mode positions. Flight Mode
names can be 20 characters including spaces.
Included in the Function List is the Custom Voice
Setup. The submenu allows for voice notification of a
switch change or a sequence of alerts using the Stepping
Events option. The available words and phrases are vast
and can require much scrolling to see all of the options.
Each time you select a voice notification, the list starts at
the beginning, so setting up notifications for triple rates
requires moving through the selections three times.
The time it takes to program these is worth the effort,
because it allows pilots to keep their eyes on the aircraft
while hearing necessary information. You’ll not have to
guess if you flipped the correct switch or need to look away
from at the screen for the timer or telemetry information.
The DX9 has cut the cord by allowing a DSM2 or
DSMX radios to be bound to the DX9 as the slave radio.
Wireless Training allows two modes of operation:
Programmable Master and Pilot Link. In Programmable
Master mode, the incoming signals are unaffected by
transmitter settings and are forwarded unchanged to the
When using Pilot Link mode, incoming signals are
treated as though they were stick movements on your
transmitter so any rate settings, exponential, etc. will
be applied. Pilot Link mode only applies to the first
four channels. Channels five and higher are still in the
Programmable Master mode.
Spektrum radios have always impressed me with their
ease of programming and handy labeling of receivers,
taking the guesswork out of radio setup. Beyond that
the Model Match feature provides added safety, while
the ability to download and share model setups provides
The Spektrum DX9 incorporates new features such
as voice notifications, 250-model memory, and wireless
training functionality. Add to that the large number of
receiver options, telemetry gear, and BNF aircraft available,
and it’s clearly a capable and versatile radio.
Your investment will not soon become obsolete.
Spektrum Air Ware software updates and a promise of
a forward-programming feature will allow you to enjoy
a new generation of Spektrum components that can be
programmed directly through the DX9.
74 Model Aviation MARCH 2014