darTZeel Audio NHB-108 A version - Manual (Page 10)

darTZeel NHB-108 model one Owner's Manual Page 10 of 17
The speaker's impedance switch is lo-
cated at the upper left of the transformer
(upper right for the right channel),
Fig.2 Speaker's impedance switch
as shown in Fig.2
When the switch is pointing towards the
front plate, you are in Lo mode, suitable
for 1Ω and 2Ω speakers. In this mode,
you can also parallel 2 or even 3 pairs of
4Ω speakers.
By flicking the switch towards the rear
panel direction, you set the Hi, default
mode, for 4Ω and 8Ω speakers. This is
the most often used configuration.
The darTZeel NHB-108 model one being a
true dual mono design, you can also use
it to biamplify hybrid loudspeakers (hav-
ing different technology and impedance
drivers, i.e. an 8Ω woofer and a 2Ω
tweeter) by switching one channel to Hi
and the other one to Lo, respectively.
Please bear in mind that in this case, you
will need two darTZeel NHB-108, one for
each loudspeaker.
Once you have chosen your configura-
tion, you can carefully put the glass
cover back, and screw it on again as fol-
lows:
Freely hand screw until you feel the
thread-end resistance. Then use the
supplied screwdriver and turn an extra
1/8 turn approximately. The screw must
be sufficiently tightened to prevent the
possibility of the glass rotating around
the screw axis.
Then reconnect all the wires and cables,
paying special attention to the loud-
speaker cables. They must be hooked to
the Speaker Terminals (7) before powering
the amplifier ON.
Now just sit back and relax, and im-
merse yourself in pure musical pleasure!
6. Maintenance
6.1. Fuse(s) replacement
The following procedure concerns the left
channel. For the right channel, the pro-
cedure is the same but that the fuse is in
a mirror image configuration.
If one – or both – fuse(s) has/have
blown, first try to determine the cause.
The Crowbar circuit installed in the
darTZeel NHB-108 model one causes fuses
to melt when an abnormal situation is
detected.
For more information about this topic,
please refer to the Audiophile's technical
manual.
If a newly replaced fuse immediately
melts when you power on your darTZeel
NHB-108 model one, even though your
speakers are correctly connected to the
Speakers Terminals (7)
, unplug the AC
mains and contact us directly:
[email protected]
Hereunder is the procedure:
In order to change a fuse, power off your
darTZeel NHB-108 model one by pressing
the Power Nose (3) button.
!!! UNPLUG THE AC CORD FROM MAINS,
and wait for 5 minutes !!!
Remove all the input and output connec-
tions.
Remove the single central screw located
on the top smoked glass cover. Take the
two supplied suction grips, slightly wet
them in order to provide strong vacuum,
and firmly apply them on the cover
glass, as indicated in Fig.1
Please be careful when removing the top
cover, since it is of real glass, not Plexi-
glas TM .