Proel DH940 ユーザーズマニュアル
UNIVERSITÀ DEGLI STUDI DI L’AQUILA
DIPARTIMENTO DI INGEGNERIA ELETTRICA
DIPARTIMENTO DI INGEGNERIA ELETTRICA
• Comment on the Results of DIE HARD cable tests
The measurements carried out in the Electrical and Electronic measurements Laboratory in the Engineering department of the
‘Università degli Studi’ University in Aquila, Italy have been done so under conditions worse than those usually used in similar tests.
This has been done to reproduce the extreme conditions of use to which the cables are subjected. The connection of the cable to
the measurement apparatus has been carried out using two connectors complementary to those applied by the constructor at the
two ends of the cable. In doing so, the parameters measured also take account of the two connections which often constitute the
most critical aspect in the connection of two audio systems. The results obtained have consistently revealed reactions superior to
what was expected, keeping in consideration the type of application. The transmitted frequency band measured during the laboratory
testing have resulted as consistently above 2MHz, two orders superior to that of an audio signal (20kHz). This parameter guarantees a
constant attenuation ratio for the entire signal band, a condition necessary to avoid alteration in the spectral components, guaranteeing
a distortion free signal. 5 meter cables complete with connectors have shown a resistance of only one tenth of an Ohm, a value
attainable exclusively with state of the art technology for the construction of the conductors and connectors. Regarding the inductivity
and the capacity parasites, non significant values have been found which, insofar as not being normally present in cables, is found as
a result of the constructive geometries of the conductors. The diaphonic tests have shown reduced interference effects between the
channels, often at the limits of resolution of the measurement apparatus. It has been seen that the cables examined feature further
positive aspects, such as the extreme flexibility which the manufacturer has achieved, even in the cables with a thicker diameter and
an elevated quality of the connectors, almost all with 24k gold plated contacts.
In conclusion, the DIE HARD cables have demonstrated an excellent response to all of the measurements and tests and can therefore,
for the construction characteristics and materials used, be classified as a connection system of elevated performance, applicable for
professional applications.
‘Università degli Studi’ University in Aquila, Italy have been done so under conditions worse than those usually used in similar tests.
This has been done to reproduce the extreme conditions of use to which the cables are subjected. The connection of the cable to
the measurement apparatus has been carried out using two connectors complementary to those applied by the constructor at the
two ends of the cable. In doing so, the parameters measured also take account of the two connections which often constitute the
most critical aspect in the connection of two audio systems. The results obtained have consistently revealed reactions superior to
what was expected, keeping in consideration the type of application. The transmitted frequency band measured during the laboratory
testing have resulted as consistently above 2MHz, two orders superior to that of an audio signal (20kHz). This parameter guarantees a
constant attenuation ratio for the entire signal band, a condition necessary to avoid alteration in the spectral components, guaranteeing
a distortion free signal. 5 meter cables complete with connectors have shown a resistance of only one tenth of an Ohm, a value
attainable exclusively with state of the art technology for the construction of the conductors and connectors. Regarding the inductivity
and the capacity parasites, non significant values have been found which, insofar as not being normally present in cables, is found as
a result of the constructive geometries of the conductors. The diaphonic tests have shown reduced interference effects between the
channels, often at the limits of resolution of the measurement apparatus. It has been seen that the cables examined feature further
positive aspects, such as the extreme flexibility which the manufacturer has achieved, even in the cables with a thicker diameter and
an elevated quality of the connectors, almost all with 24k gold plated contacts.
In conclusion, the DIE HARD cables have demonstrated an excellent response to all of the measurements and tests and can therefore,
for the construction characteristics and materials used, be classified as a connection system of elevated performance, applicable for
professional applications.
L’Aquila, 28.09.2004
F.to Prof.
Giovanni Bucci
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C A T A L O G U E