5. AUX Returns
These 1/4" TS inputs are for the return of audio to the
Helix Board 17 mixers, processed by an external signal
processor. If really needed, they can also be used as ad-
ditional inputs. The feed from these inputs can be adjusted
using the AUX Return controls on the face of the mixer.
When connecting a monaural device to the AUX Return
1 and 2 inputs, simply plug a 1/4" phone jack into the left
(mono) input, and the signal will appear in the right as
well. This, however, does not work for the AUX Return 3
input on the .
NB.
When any device is plugged into the mixer’s corresponding EFX
Return inputs (AUX Return 3), the mixer’s internal digital effect engine
is then disabled.
6. Foot Switch Jacks
These ports are for the inclusion of a foot switch, used
to remotely adjust properties of the built-in Digital Effect
processor. The uppermost jack is used to turn the Digital
Effects on and off, where the lower jack is used for adjust-
ing tap delay properties.
7. Phones
This stereo output port is suited for use with headphones,
allowing monitoring of the mix. The audio level of this output
is controlled using the Control Room / Phones control.
8. Record Out
These outputs will accommodate RCA
cables, able to be fed to a variety of
recording devices. Also included is a
mini stereo jack for the addition of
recording devices such as MD play-
ers, and even laptop computers. The
Trim Control ensures you can adjust
the output level of these controls to
match to your recording level.
9. 2T Return
These RCA inputs are used to con-
nect the mixer with parallel external
devices, such as sub mixers or CD,
Cassette Players. Also included are
mini stereo jacks, for receiving signals from audio devices
like portable CD, MD and MP3 players.
10. Main Out
These two 1/4" TRS phone jacks will output the fi nal
balanced stereo line level signal sent from the main mix-
ing bus. The primary purpose of these jacks is to send the
main output to external devices, which may include power
amplifi ers (and in-turn, a pair of speakers), other mixers,
as well as a wide range of other possible signal processors
(Equalizers, Crossovers, etcetera).
Making Connections
Inputs and Outputs
1. XLR Microphone Jacks
These jacks accept typical 3-pin XLR
inputs for balanced and unbalanced
signals. They can be used in con-
junction with microphones – such as
professional condenser, dynamic or
ribbon microphones – with standard
XLR male connectors, and feature
low noise preamplifi ers, serving for
crystal clear sound replication. The
Helix Board 17 mixer features fi ve
standard XLR microphone inputs.
NB.
When these inputs are used with condenser microphones, the
Phantom Power should be activated. However, when Phantom Power
is engaged, single ended (unbalanced) microphones and instruments
should not be used on the Mic inputs.
2. Line Inputs
This input accepts typical 1/4" TRS balanced or TS unbal-
anced inputs, for balanced or unbalanced signals. They
can be used in conjunction with a wide range of line level
devices, such as keyboards, drum machines, electric gui-
tars, and a variety of other electric instruments.
3. Stereo Channels
The Helix Board 17 features a few balanced stereo chan-
nels, thrown in for maximum fl exibility. Each of these stereo
channels features two 1/4" phone jacks, for the addition
of various line level input devices, such as electronic key-
boards, guitars and external signal processors or mixers.
If you wish to use a
monaural device on
a stereo input, simply
plug the device’s 1/4"
phone jack into the
left (mono) input and
leave the right input
bare. The signal will be
duplicated to the right
due to the miracle of
jack normalizing.
4. AUX Sends
These 1/4" TRS
balanced outputs may be used to connect to an external
signal processor, or even to an amplifi er and speakers
(depending on your desired settings) from the mixer. The
signal from the AUX Sends is controlled by the AUX master
controls (on the face of the mixer), which obtain their signal
from the AUX controls located on each channel strip. The
Helix Board 17 features 2 AUX sends.
NB.
When sending unbalanced signals from this output, a 1/4
"
TRS
stereo plugs must be used and have the ring-pin disconnected, as to
avoid damaging this mixer.
6
HELIX BOARD 17
