HELIX B Five User Manual

1
Power/Protect
LED
The
Power/Protect
LED
indicates
the
operating
state
of
the
amplifier.
A
green
LED
shows
that
the
amplifier
is
ready
for
operation.
A
red
LED
indicates
that
a
malfunction
has
occurred.
A
malfunction
may
have
different
causes
as
the
HELIX
B
FIVE
is
equipped
with
different
protective
circuits.
These
protections
shut
off
the
amplifier
in
case
of
overheating:
over-
and
undervoltage,
short-circuit
on
loudspeakers,
low
impedance
and
false
connection.
Please
check
for
connecting
failures
such
as
shoL-
circuits,
wrong
connections,
wrong
adjustments
and
ovei·-
temperature.
If
the
amplifier
does
not
turn
on
it
is
defect
and
has
to
be
send
to
your
local
authorized
dealer
for
repair
service.
A
detailed
description
of
the
malfunction
and
the
purchase
receipt
has
to
be
attached.
2
Connecting
the
ground
cable
The
ground
cable
should
be
connected
to
a
central
ground
reference
point
(this
is
located
where
the
negative
terminal
of
the
battery
is
grounded
at
the
metal
body
of
the
vehicle),
or
to
a
bright
bare-metal
location
on
the
vehicle
chassis,
i.e.
an
area
which
has
been
cleaned
of
all
paint
residues.
Recommended
cross
section:
min.
25
mm
2
.
3
Connecting
the
remote
lead
The
remote
lead
should
be
connected
to
the
automatic
antenna
(aerial
positive)
output
of
the
head
unit
(radio).
This
is
only
activated
if
the
head
unit
is
switched
ON.
Thus
the
amplifier
is
switched
on
and
off
with
the
head
unit.
4
Connecting
the
battery
cable
Connect
the
+
12
V
power
cable
to
the
positive
terminal
of
the
battery.
Recommended
cross
section:
min.
25
mm
2
•
5
Fuses
The
input
fuses
are
connected
in
parallel
and
provide
protection
against
an
internal
equipment
fault,
i.e.
the
system
must
be
additionally
protected
by
a
further
line
fuse
located
in
the
vicinity
of
the
battery
(max.
distance
from
battery:
30
em
I
12").
The
fuse
value
for
the
HELIX
B
FIVE
is
3 x
30
Amperes.
6
Speaker
terminals
To
connect
the
speaker
cables.
See
figures
on
page
13.
Never
connect
the
loudspeaker
cables
with
the
car
chassis
ground.
It
damages
your
amplifier.
Ensure
tl1at
the
loudspeaker
systems
are
correctly
connected
(phase),
i.e.
plus
to
plus
and
minus
to
minus.
Exchanging
plus
and
minus
causes
a
total
loss
of
bass
reproduction.
The
plus
pole
is
indicated
on
most
speakers.
The
impedance
per
channel
should
not
be
lower
than
2
Ohms.
In
this
case
the
protection
electronics
shut
down
the
amplifier.
7
&
22
Signal
inputs
The
HELIX
B
FIVE
is
equipped
with
6
RCA
inputs.
They
can
be
connected
with
the
pre-amplifier
outputs
I
line
outputs
of
the
control
device
(head
unit,
processor
etc.).
Please
consider
that
a
sum
signal
for
the
5th
channel
is
formed
by
the
last
two
signal
inputs
(channel
5
,L"
and
,R").
8
Highlevel
speaker
input
Tt1e
HELIX
B
FIVE
is
equipped
with
four
extra
highlevel
speaker
inputs.
They
can
be
directly
connected
to
the
speaker
outputs
of
the
head
unit.
We
recommend
to
operate
the
highlevel
input
only
with
the
enclosed
connecting
cable
or
with
a
HELIX
wire
harness
(optional)
to
avoid
wrong
connections
or
damage
of
the
connector.
9
Input
signal
mode
switch
2-channel
-
4-channel
-
5-channel
mode
2-channel
mode:
When
head
units
with
one
stereo
output
are
operated,
all
amplifier
channels
are
supplied
with
this
signal.
This
means,
that
only
the
first
and
second
RCA
I
highlevel
input
must
be
connected.
In
this
mode
the
channel
1
input
signal
is
relayed
parallel
to
channel
3
and
channel
2
is
relayed
parallel
to
channel
4.
For
channel
5
(subwoofer
output)
a
sum
signal
is
formed
by
the
channel
1
and
channel
2
input
signaJs..
11

HELIX B Five Specifications

General

Brand	HELIX
Model	B Five
Category	Amplifier
Language	English