9
English
2 Safety Notes
The amplifier module corresponds to all relevant
directives of the EU and is therefore marked
with .
WARNING
The module uses dangerous
mains voltage . Install the mod-
ule before connecting it to the
mains; otherwise you will risk an
electric shock .
•
The module is suitable for indoor use only .
Protect it against dripping water and splash
water, high air humidity and heat (admissible
ambient temperature range 0 – 40 °C) .
•
Do not operate the module or immediately
disconnect the mains plug from the socket
1 . if the module or the mains cable is visibly
damaged,
2 . if a defect might have occurred after the
unit was dropped or suffered a similar
accident,
3 . if malfunctions occur .
In any case the module must be repaired by
skilled personnel .
•
Never pull the mains cable to disconnect the
mains plug from the socket, always seize the
plug .
•
For cleaning only use a dry, soft cloth; never
use water or chemicals .
•
No guarantee claims for the module and no
liability for any resulting personal damage
or material damage will be accepted if the
module is used for other purposes than orig-
inally intended, if it is not correctly installed or
operated, if it is modified or if it is not repaired
in an expert way .
If the module is to be put out of oper-
ation definitively, take it to a local recy-
cling plant for a disposal which is not
harmful to the environment .
3 Applications
This amplifier module is designed for installa-
tion into a subwoofer speaker cabinet which is
used to complement existing speaker systems
with low frequencies when a convincing bass
reproduction is required .
The module is provided with a low-pass filter
with adjustable cut-off frequency (40 – 200 Hz)
and a control to correct the phase in combina-
tion with other speakers . The amplifier has a
limiter to protect the speaker .
The power amplifier is designed as a class D
amplifier . It is supplied with power from a switch-
mode power supply . Thus, it has an extra high
efficiency at a low weight .
Instead of connecting the module to sig-
nal sources with line level, it is also possible to
connect it to the speaker outputs of a power
amplifier .
4 Installation and Connection
WARNUNG
When installing the amplifier
module, always disconnect it
from the mains . For operation,
the module must always be in-
stalled; otherwise you will risk an
electric shock .
1) To install the module, saw a suitable cutout
(approx . 240 mm × 165 mm) into the speaker
cabinet .
2) Only connect speakers or speaker systems
with a total impedance of at least 4 Ω . Con-
nect the speaker via the two cables coming
from the PCB . Always observe the correct
polarity: connect the positive pole of the
speaker to the red cable (marked “SP+” on
the PCB); connect the negative pole to the
black cable (marked “SP−” on the PCB) .
3) Insert the module into the speaker cabinet .
Make sure that there is sufficient space for
the module inside the cabinet and that there
is no risk of contact with other electrocon-
ductive components or heat-sensitive mate-
rials . When the front plate is not recessed,
the required mounting depth is 65 mm . Do
not stretch or squeeze the connection cables .
4) Use ten screws (
⌀
4 mm) to fasten the front
plate of the module to the cabinet .
Содержание 32.0790
Страница 2: ......
