darTZeel Audio NHB-108 B version - Manual (Page 15)

darTZeel NHB-108 model one
User Manual, version B 1.0 Page 15 of 35
manual in order to better know how the Crowbar
circuit works.
Fuses can blow if the nominal impedance of your
speakers is less than 3
Ω and your NHB-108 model
one has not been set up to drive such a load.
Please refer to chapters 6.3. "User parameters" and
5.1 "Important prior notice". Then again check
your fuses if you are in doubt, by taking a look at
point 7.1. "Fuse(s) replacement". Be sure that you
are using fuses of
correct rating and type .
8.2.5. Sound too quiet
A) darTZeel's Eyes are quasi-permanently in the
clipping state, as described in chapter 6.2
"darTZeel's Eyes", point 4.
Your speakers are particularly inefficient! Please
choose loudspeakers of more than 84 dB/w/m …
Alternatively, maybe your room is very big, and
that even with your old 1200 watts per channel
powerhouse amp, there was only just enough
volume?
In such a situation, please do not hesitate to
consult us. We will try to help you find a solu-
tion.
B) The volume setting of your preamplifier is close
to maximum.
This can occur if you use either a passive or a
low gain preamplifier.
8.2.7. Melting Fuse(s) at power ON
The NHB-108 model one features a Crowbar inhib-
iting circuit working at power ON. During the first
20 milliseconds, no Crowbar operation will occur,
avoiding blown fuse(s) if bumps greater than 2
volts are detected.
However, if you power your machine ON again,
immediately after having powered it OFF, it is pos-
sible that it will eventually trigger the Crowbar
circuit, and lead to melted fuse(s). In such a case,
you will have to change the blown fuse(s) as de-
scribed in chapter 7.1. "Fuse(s) replacement".
In order to avoid this situation, we recommend that
you wait around 3 seconds before powering your
NHB-108 model one
ON again, when switched
OFF.
8.2.8. RAS (Regular And Satisfactory)
In such a situation, we sadly deplore having no real
cure.
We suggest you display your most charming smile,
relax in your armchair, and enjoy listening to your
favorite tunes.
Symptoms should disappear by themselves within a
few days. If everything continues OK, please invite
some friends!
9. Conditions of warranty
9.1. Breakdowns or faulty parts
The darTZeel NHB-108 model one is guaranteed
for one full year, parts and labor, against any break-
downs or component failure, as is the tradition in
Switzerland for such equipment.
As we see it, any warranty longer than 1 year is the
obvious sign of inferior quality and design, indicat-
ing that a failure could arise anytime.
Any component either will fail within days or will
last "forever" (several decades in practice).
This is the reason why all our machines are thor-
oughly broken in before being lovingly packed and
sent to you.
We are still fully aware that no component is al-
ways flawless, and that a problem could arise any-
time after the warranty period.
In such a case, we will carefully examine every
situation, with the aim of reducing the likely repair
costs to minimum levels. You can always trust us
for customer care, as you already trusted us when
purchasing your NHB-108 model one.