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HELIX BOARD 12 PLUS
Rear Panel
11. Channel Inserts
Located on the rear of the Helix Board, the primary use for these
TRS phone jacks is for the addition of external devices, such
as dynamic processors or equalizers, to mono input channels
1 and 2. This will require a Y cord that can send (pre-fader and
pre-EQ) and receive signals to and from an external processor.
On this connection, the tip pin is for sending the signal, whereas
the ring pin is for return. The sleeve pin, on the other hand, is
the ground.
12. ALT 3-4 Output
The signal sent from these 1/4” outputs is fed from the ALT 3-4
mixing bus, and can be used in conjunction with a large array of
devices, including signal processors, other PA systems, recording
devices, and so on.
13. 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, to the mixer.
The left jack is used to adjust the tap delay properties, whereas
the right jack is used for turning the effects on and off.
14. USB 2.0 Connection
This USB 2.0 port is for connecting the Helix
Board to any PC or Macintosh computer. It
allows all 8 input channels to be streamed to
a computer, as well as an additional stereo
channel (when operating at 96 kHz or under).
A stereo audio channel from the computer
can also be returned to the Helix Board for
monitoring. The audio sent to the computer
can be either pre- or post-fader, depending on
the pre/post setting on each input channel. The
main left and right signal, AUX signal and ALT
3/4 (all of which can also be sent through the USB interface) are
pre-fader signals. The returned USB signal can be utilized in the
USB Return section on the face of the mixer.
15. Power Connector
This port is for the addition of a power cable and
supply, allowing power to be supplied to the mixer.
Please use the external power supply that is
included with this mixer only as using other adaptors
could damage the mixer. For a replacement supply,
contact your nearest Phonic dealer.
CONTROLS AND SETTINGS
Rear Panel
16. Power Switch
This switch is used to turn the mixer on and
off. Ensure you turn all level controls down
before activating.
17. Phantom Power Switch
When this switch is in the on position, it
activates +48V of phantom power for all
microphone inputs, allowing condenser microphones (well, the
ones that don’t use batteries) to be used on these channels.
Activating Phantom Power will be accompanied by an illuminated
LED above the left channel Level Meter. Before turning Phantom
Power on, turn all level controls to a minimum to avoid the
possibility of a ghastly popping sound from the speakers.
NB
. Phantom Power should be used in conjunction with balanced
microphones. When Phantom Power is engaged, single ended (unbalanced)
microphones and instruments should not be used on the Mic inputs.
Phantom Power will not cause damage to most dynamic microphones,
however if unsure, the microphone’s user manual should be consulted.
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