User manual

en
Control elements
6
The 17 SEND output is used to connect a shielded ¼"
mono jack cable to the input of an external effects
unit.
The 18 RETURN input is used to connect a shielded
¼" mono jack cable to the output of an external
effects unit.
The 19 RECORDING output is used to connect directly
to a recording device or a PA system. This signal
is specially ltered to provide the optimum signal
quality for this application.
The 20 DIRECT output is used to route the amplier’s
unltered preamp signal, for example, to a second
amplier and loudspeaker system by retaining the
original sound.
The 21 IMPEDANCE switch lets you specify the loud-
speaker impedance. Always apply the value that
is identical to the impedance of the used speaker
cabinet. Please also read „Wiring the BUGERA“.
!
Both the paralleled 22 LOUDSPEAKER outputs (¼"
mono jacks) are used to connect the speaker
cabinet(s). The minimum impedance is 4 Ohms. The
IMPEDANCE switch should always be set to match
the impedance of the used speaker cabinet.
ATTENTION! TO AVOID DAMAGE TO YOUR
!
AMP, NEVER USE THE BUGERA VALVE AM-
PLIFIER WITHOUT A LOUDSPEAKER CON-
NECTED!
!
This 23 POWER MODE switch reduces the output
power of the amplier. In TRIODE mode, the ampli-
er switches to 60 W operation, reducing the output
power by half (from 120 W to approx. 60 W). In
PENTODE mode, the amplier runs at full power in
pentode operation (120 W).
*
WARNING: ONLY REPLACE THE FUSE WHEN THE 24
MAINS CABLE HAS BEEN DISCONNECTED! The
FUSE is found in the fuse holder. If the fuse is
blown, it needs to be replaced with a fuse of the
same kind by all means. Otherwise, the unit could
seriously be damaged, in which case the warranty
is void. If the fuse is blown repeatedly, you should
take the unit to a qualied service technician.
*
The 25 IEC MAINS connector is used to connect the
mains cable that has the appropriate voltage rat-
ings for your country (included). At all times, make
the connections to the amplier before plugging the
cable into a power outlet.
This is the 26 SERIAL NUMBER of the amplier.
Footswitch
Footswitch
The 27 CLEAN switch activates the CLEAN channel.
The 28 LEAD switch activates the LEAD channel.
Inside the BUGERA 1990