Fohhn Arc-Top active, User Instructions

Page: 32 / 48

Used to connect the supplied IEC mains cable. Powercon mains
jack: for lockable Powercon mains plugs. A significantly safer
mains connector - the Powercon plug and jack connector
prevent the unit from being unplugged unintentionally during
operation. Possible to connect max. 2 Tops per supply lead.
While the power-switch (2) is turned off, the thru (16)
connector still provides the mains voltage.
Main jack (1)
(16)
Actuating the power on/off switch starts up the amplifier,
the switched-mode mains and the DSPs in soft-start mode.
The speakers are then activated and the status LEDs for ch1
(13) and ch2 (14) light up green - your Top active is ready
for operation. Now the blue status LED on the front is also
activated. See (40)
Power switch (on/off) (2)
5.4 Controls for Top active (see page 31!)
The passive Top or Sub is connected to output jack (4). Plug
& Play.
You can connect only one passive Top or Sub to
channel ch2.
Observe the minimum impedance of 8 ohms!

Please remember that only 1 Top or Sub can be connected
to output ch2 (4)! If an operational error occurs, the
amplifier switches to Protect (protect LEDs for ch1 (13)
and / or ch2 (12) light up red)
Speakon configuration:
Output port ch1 (4)
Connect your mixing desk to the input jacks (8) and (6). The
Neutrik multifunctional jacks allow flexible use of XLR and
jack connectors. The lockable XLR jack provides you with a
very secure connection - the lock prevents the unit from being
unplugged unintentionally during operation.
Input jack ch2 (6)
Connect your mixing desk to the input jacks (8) and (6). The
Neutrik multifunctional jacks allow flexible use of XLR and
jack connectors. The lockable XLR jack provides you with a
very secure connection - the lock prevents the unit from being
unplugged unintentionally during operation.
Input jack ch1 (8)
The input signal is available unchanged at XLR link jacks (9)
and (7) and can be transmitted to other devices.
If there is no input signal in ch1 (8), the link jack (9) has no
function.
Link-Buchse ch1 (9)
+1
-1
+2
-2
speakon
All controls are fitted flush to the brushed
aluminium back plate for protection. The amplifier
is cooled via the back plate. The back plate is
usually only 14°C warmer than the ambient
temperature. The temperature and speed controlled
ventilator is necessary for trouble-free operation
and a long service life for the amplifier. The
ventilator is electronically controlled.
Green: After switching on the X-Sub active at the Power on/
off switch (2), this status LED for ch1 lights up green. This
indicates that the unit is ready for operation.
Red: The protect LED (13) lights up red when the electronic
protective circuits for the amplifier are active, for example,
when the user connects a short-circuited Speakon cable to
the X-Sub active. The Top active is comprehensively protected
against short-circuiting, low impedance/overloading and excess
temperature.
protect-LED ch1 (13)
In the GND position, the signal ground is earthed. In the LIFT
position, the signal ground is isolated from the housing and
prevents humming as a result.
ground- / lift switch (10)
Link jacks: The input signal is available unchanged at these XLR
link jacks and can be transmitted to other devices.
If there is no input signal in ch2 (6), the link jack (7) has no
function.
Link jack ch2 (7)
Green: After switching on the X-Sub active at the Power on/
off switch (2), this status LED for ch2 lights up green. This
indicates that the unit is ready for operation.
Red: The protect LED (12) lights up red when the electronic
protective circuits for the amplifier are active, for example,
when the user connects a short-circuited Speakon cable to
the X-Sub active. The Top active is comprehensively protected
against short-circuiting, low impedance/overloading and excess
temperature.
protect-LED ch2 (12)
32 | Top active