4
3.2
Rear Panel controls and connections
handmade by
in GERMANY
-
+
MAIN POWER 1W - 150W
INPUT
MONO
POWER-AMP
Dwarf II
OUT
IN
OUTPUT
REMOTE 10V DC
5
6
7
8
9
10
11
12
5. Input socket:
To this socket the Output of the preamplifier is connected.
6. Output socket:
To this socket another DWARF II (or any other power amplifier with symmetrical
Input) can be connected (e.g. for Bi-amping)
7. Remote Input:
To this socket the DC Voltage for the Control Voltage Trigger is connected. The
voltage should be between 3 and 12 V.
8. Remote Output:
This connector outputs a 10V DC voltage when a trigger signal is applied to
socket
(7).
This feature allows to connect e.g.
a further
DWARF II
.
9. Speaker terminals:
Connector for the speaker cable.
CAUTION!
The load impedance must not be inferior to 3 Ohms!
10. AC input socket:
To this socket you connect the AC mains cable.
11. Fuse compartment:
The main fuse is located here. In the event that the main fuse needs to be
changed, please remove the AC mains connector first.
Caution!
Replace fuses only with the same type to avoid possible damage!
12. Mains switch:
With this switch the
DWARF II
is turned to the
Standby-Mode.
It will
be switched on finally by pressing key
(1).
Normally the mains switch can be kept turned on,
except you know, you won’t use the power amplifier for some days. The current consumption
in the Standby-mode amounts less than 2 Watts.
4. Protective functions
Dwarf II
is equipped with several safety functions to protects the power amplifier and
connected speakers. All these safety functions are indicated by different flashing sequences
of the LED in the front.
-
DC-Offset
(dangerous DC voltage on the speaker output)
-
Overload
(overload of the power amplifier)
-
Temperature control
-
HF Detector
(high frequency, inaudible oscillation of the power amplifier )
DC-Offset
can arise when the preamplifier which is connected to the
DWARF II
itself
outputs a small
Offset
voltage. This DC voltage is intensified by
DWARF II
and the
DC Voltage, which is dangerous for the speaker, appears to the speaker Output terminals.
Further a DC voltage can appear to the Output, if the set-up of the power amplifier is defective.
In this case the DC-protection deactivates the speaker relays immediately to avoid damage to
the speakers. When DC-protection reacts the speakers are immediately switched off by the
