mbl 9011 | mbl 9008 A | mbl 9007
16
3.2 Mains Voltage
The mbl 9011 is equipped with 4, the mbl 9008 A with 3 and the 9007 with 2 low-dissipation toroidal transformers. They operate
at 230 Vac or 115 Vac, 50/60 Hz. The rear side indicates the selected mains voltage which has been pre-set by the manufacturer.
Change this setting only, if you want to use the amp in a country with different mains voltage. A change of the mains voltage is
done inside the unit by using solder bridges. Always have a qualified service technician or a qualified dealer to do this for you.
This procedure is not a warranty service.
3.3 Fuses
Caution
: Disconnect the power cord from the electric outlet before checking the fuses!
The fuse holders for the primary fuses are located next to the power switches on the rear side of the amp. The holders take 5 x
20 mm fine-wire type fuses. Two fuses are needed for each power switch. You must change the value of the fuse, if you use a
different mains supply (230 Vac/4 AT or 115 Vac/8 AT).
Inside the amp, next to the transformers, are the fuse holders for the secondary fuses. Their value is 10 AT (5 x 20 mm fine-wire
type), irrespective of the mains voltage.
3.4 First Operation
Make all necessary connections (input, output, mains) and press the power switches (on the rear side of the amp). mbl 9011/9008 A:
Always activate power switch 1 first.
When the amp is switched on, the blue LED´s on the front panel will light. In addition to the blue LED’s a yellow one will be il-
luminated between them.
3.5 Standby Mode and Sleep Mode
To switch “on” and “off” the standby mode press the standby switch on the left side of the amp. When the amp is in standby
mode the blue LED´s on the front panel are not lighted, only the yellow LED lights. (mbl 9007: the blue LEDs on the front panel
glow in low intensity).
When the amplifier is in standby mode only the input electronics are held at operating temperature. No music can be heard in
this mode. We recommend this mode for turning off the amplifier (20 W power consumption).
mbl 9007
: With the sleep button of the mbl 9007 you can toggle between sleep and standby mode. In sleep mode the blue LED´s
on the front panel are off, only a yellow LED in the center is on. In this mode the power consumption is reduced to 4 VA.
In both modes no signal appears on the speaker terminals.
