Hitachi HS-371 Bedienungsanleitung Seite 3

Your ModelHS-371is a top-linespeaker s ystem which isdesigned to reproduce soundwith hardly anynon-linear distortion and
to meetthe requirements of hi-fi fans. To operateyour speaker system properly, please readthis instructionmanualcarefully.
STRUCTURE
High-power-handling-capacity
The woofer and midrange voice coils each contain thermo-
setting self-bonding enamel wires. These help to increase
the adhesive strength in high temperatures and also to
enhance the speakers' capacity to handle power inputs.
Aluminum voice coil bobbin speakers
The woofer, midrange and tweeter all incorporate alumi-
num voice coil bobbins.
the heat dissipation effect and increases the support
rigidity inside the cones.
Newly developed midrange
Mid-frequency sound can be reproduced by use of the
newly developedwide-band5 in. (12 cm) midrange.
Newly developed dome tweeter with titanium diaphragm
* The high rigidity titanium diaphragm reducesdistortion
and its small diameter of I in. (2.5 cm) improves
dispersion.
* The non-ferrous plastic frame and the foam rubber
help safeguard against the adverse acoustic effects
generated by the shape of the frame front and by
undesirable frame resonance.
Enclosure
The 'frame-less baffle' enclosure
effects such as standing waves which can be generated
if the cabinet front frame is not designedproperly.
Front grille cover
The front grille cover can be easily detached.
OPERATION
Installation location
(I) Place the speaker system in front ofa wall with the
enclosure as close to the wall as possible.
(2) The wall facing the speaker system should be covered
with a thick curtain or sliding screen to absorb the
sound and improve the sound quality.
(3) Stands for the speaker system should be strong and
rugged. Weak stands produce undesirable vibration
and impair the quality of the reproduced sound.
Impedance
The impedance of this speakersystem is 8-ohms. When
using atransistorizedamplifier, connect to the 4 —16 ohms
AND FEATURES
speakers
This feature helps to reinforce
eliminates other adverse
LC network and level controller
* Network is manufactured
through the careful repetition of listening tests in the
listening room and detailed
anechoic chamber, after
respective frequency bands of woofer, midrange and
tweeter by means of low distortion
condensers.
* Since the level controller
board, level adjustment can be performed from the
front. High frequency sound can be changed so that
the sound can be adjusted as desired according to
room conditions.
Input
output terminals. With a vacuum tube amplifier, connect
to the 8-ohm terminals. Connect the speakers correctly
after reading the amplifier's operation manual.
Connections to amplifier
Always align the polarities correctly when connecting the
speaker system to the amplifier.
versed, the speaker system will not attain its optimum per-
formance because the phase and stereo reproduction will
be adversely affected.
system
with its constants determined
measurements in the
effectively dividing the
choke coils and
is attached to the baffle
Woofer
(9
Midrange
9)
Tweeter
(9
If the polarities are re-
m