HELIX blue B TWO User manual

'\®HELl
blue
BTWO
2-Kanal
Verstarker
2-Channel
Amplifier

::::c: Dear Customer,
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::::i
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congratulations on your purchase of this high-quality
HELIX amplifier. This series highlights best quality, excel-
lent manufacturing and state-of-the-art technology. After
almost 30 years of experiences in the research & develop-
ment of audio products this amplifier generation sets new
standards. The attractive typical HELIX design makes this
amplifier an outstanding and top of the class product.
We wish you many hours of en.ioyment with your new
HELIX amplifier .
Yours
AUDIOTEC FISCHER Team
General installation instructions for HELIX amplifiers
To find out how HELIX amplifiers work best for you, read
this manual carefully and follow the instructions for instal-
lation. We guarantee that this product has been checked
for proper functioning before shipping.
Before you start installation, disconnect the car battery at
the minus pole. We would urge you to have the installation
work carried out by a specialist as verification of correct
installation and connection of the unit is a prerequisite for
warranty cover of the HELIX amplifier.
Install your amplifier at a dry location where there is suffi-
cient air circulation to ensure adequate cooling of the
equipment. For safety reasons, the amplifier must be secu-
red in a professional manner. This is performed by means
of four fixing screws screwed into a mounting surface
offering sufficient retention and stability.
Before drilling the holes for the screws, carefully examine
the area around the installation position and make sure
t11at there are no electrical cables or components, hydrau-
lic brake lines or any part of the petrol tank located behind
the mounting surface - otherwise these could be dama-
ged. You should be aware of the fact that such components
may also be concealed in the double-skin trim
panels/mouldings .
General instruction for connecting the amplifiers
The HELIX amplifiers may only be installed in motor vehi-
cles which nave a 12 Volt minus pole connected to the
chassis ground. Any other system could cause damage to
the amplifier and the electrical system of the vehicle.
The plus cable from the battery for the complete system
should be provided with a main fuse at a distance of max.
30 em from the battery. The value of the fuse is calculated
from the maximum total current input of the car audio
system.
Install the cabl1ng in a manner which precludes any danger of
the leads being exposed to shear, crushing or rupture forces.
!f there are sharp edges in the vicinity (e.g. holes in the body-
work) all cables must be cushioned and protected to prevent
fraying.
Never lay the power supply cables adjacent to leads and
lines connecting other vehicle equipment (fan motors, fire
detection modules, gas linef etc.).
In order to ensure safe installation, use only high-quality con-
nections and materials. Ask your dealer for high quality acces-
sories.

EQUIPMENT
FEATURES
AND
CONTROL
ELEMENTS
HELIX
B
TWO
1
Power/Protect
LED
2
Connecting
the
ground
cable
3
Connecting
the
remote
lead
7
Signal
inputs
8
Highlevel
speaker
input
9
Level
controls
for
input
sensitivity
1
0
Bass-Boost
control
11
Highpass
control
4
Connecting
the
battery
cable
5
Fuse
6
Speaker
terminals
12
Switch
for
highpass
-
fullrange
-
lowpass
I
bandpass
13
Lowpass
control
14
Signal
outputs

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
TWO
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
short
-cir-
cuits,
wrong
connections,
wrong
adjustments
and
over-
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)
1
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.
12
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.
12
mm
2•
5
Fuse
The
input
fuse
provides
protection
against
an
internal
equipment
fault,
i.e.
the
system
must
be
additionally
pro-
tected
by
a
further
line
fuse
located
in
the
vicinity
of
the
battery
(max.
distance
from
battery:
30
em
I
12
11
).
The
fuse
value
for
the
HELIX
B
TWO
is
1x
30
Amperes.
6
Speaker
terminals
To
connect
the
speaker
cables.
See
figures
on
next
page.
Never
connect
the
loudspeaker
cables
with
the
car
chassis
ground.
It
damages
your
amplifier.
Ensure
that
the
loudspea-
ker
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
Signal
inputs
The
HELIX
B
TWO
is
equipped
with
two
RCA
inputs.
They
can
be
connected
with
the
pre-amplifier
outputs
I
line-out-
puts
of
the
control
device
(head
unit,
processor
etc.).
8
Highlevel
speaker
input
The
HELIX
B
TWO
is
equipped
with
two
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).
9
Level
controls
for
input
sensitivity
These
controls
can
be
used
to
match
the
input
sensitivity
of
the
individual
channels
to
the
output
voltage
of
the
con-
nected
head
unit.
These
controls
are
not
volume
controls
and
are
solely
intended
for
the
purpose
of
sensitivity
trim-
ming.
The
control
range
extends
from
200
mV
to
6
V.
1
0
Bass-Boost
control
To
raise
the
bass
signal
from
0
to
18
dB
at
45
Hz.
dB
20 30 45 100 200 300 500
0
dB
18
dB
11
Highpass
control
To
adjust
the
crossover
frequency
from
15
Hz
to
4000
Hz
.
dB
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10
15
20
50
100
200
500
1K
2K
5K
Hz
0
\S)
15Hz
4kHz

12
Switch
for
highpass
-
fullrange
-
lowpass
I
bandpass
To
switch
the
internal
active
frequency
crossover
to
highpass,
full
range
(linear)
or
lowpass
I
bandpass.
If
this
switch
is
set
on
HPF
(highpass),
the
exact
crossover
frequency
for
the
highpass
can
be
adjusted
with
control
11.
At
switch
position
FULL
(fullrange)
the
internal
frequency
crossover
is
not
active.
At
switch
position
LPF
(lowpass
I
bandpass)
the
highpass
is
always
active.
That
means
a
bandpass
is
built
in
any
case
.
As
high
pass
(11)
and
lowpass
(13)
are
adjusted
every
desired
bandpass
between
15Hz
and
4000Hz
can
be
adjusted.
Caution!
To
avoid
a
lost
of
sound
pressure
make
sure
that
the
crossover
frequencies
of
high-
and
lowpass
are
separated
of
2
octaves
when
building
a
bandpass.
That
means:
If
the
lowpass
signal
is
adjusted
to
320
Hz
the
highpass
should
be
adjusted
2
octaves
lower
on
approx.
80
Hz.
(1
octave
=
double
frequency
or
half
frequency)
If
a
subwoofer
is
connected
we
recommend
to
use
the
high
pass
control
(11)
as
variable
subsonic
filter
or
turn
it
counter-clockwise
to
15
Hz
to
get
a
subsonic
filter.
13
Lowpass
control
To
adjust
the
crossover
frequency
from
40
Hz
to
4000
Hz,
lowpass:
40
- 4
kHz
dB
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10
15
20
50
100
200
500
1K
2K
5K
Hz
0
40Hz
4kHz
14
Signal
outputs
Wide
band
(full
range)
RCA
outputs
to
connect
other
ampli-
fiers.
Stereo
Mono
+ - + - LJD
Channel
1
Channel2
Channel1
(CH1
+
CH2
bridged)

Output power RMS I max.
- at 4 Ohms ................................................................... 2x 80 I 160 Watts
-at 2 Ohms .................................................................. 2x 120 I 240 Watts
- bridged at 4 Ohms ............................................................ 1x 200 I 400 Watts
Frequency response .............................................................. 10 Hz - 30.000 Hz
Bass-Boost ..................................................................... 0- 18 dB I 45 Hz
Highpass ................................................................. 15 - 4.000 Hz adjustable
Lowpass ................................................................. 40 - 4.000 Hz adjustable
Bandpass ................................................................. 15 - 4.000 Hz adjustable
Total harmonic distortion ................................................................ < 0,03 %
Signal-to-noise ratio ..................................................................... > 95 dB
Damping factor ............................................................................ 200
Input sensitivity ..................................................................... 0.2 -6 Volts
Input impedance high level ................................................................ 1 kOhms
Input impedance RCA .................................................................. 22 kOhms
Fuse ............................................................................ 1x 30 Amperes
Dimensions (H xWx D) .............................................................. 2x 13 x 9.85
11
Weight ............................... , .......................................... 3.5 kg I 7.7 lbs
The limited warranty complies with legal regulations.
Failures or damages caused by overload or improper use
are not covered by the warranty.
Please return the defective product only with a valid
proof of purchase and a detailed malfunction description.
Technical specifications are subject to change! Errors are
reserved!
For damages on the vehicle and the device, caused by
handling errors of the device, we cannot assume liability.
All HELIX amplifiers are tagged with an E-Certification
Number and also a CE-Certification mark.
Thereby these devices are certified for a use inside
vehicles inside the European Union (EU).

AUDIOTEC
FISCHER
Audiotec
Fischer
GmbH
Gewerbegebiet
Lake
II
•
Hiinegraben
26
•
D-57392
Schmallenberg
Tel.:
+49
{0)
29
72-97
88
0•
Fax:
+49
{0)
29
72-97
88 88
E-mail:
[email protected]
•
Internet:
www.audiotec-fischer.com