Microprocessor Control - Halcro dm10 Owner's Manual

Audible relay noise
The dm8 and dm10 use mechanical relays in
all switching including the volume control
because they exhibit the following ideal
characteristics:
• zero ON resistance
• infinite OFF impedance
• very low OFF capacitance
• zero distortion
In contrast, the now universally popular solid-
state relays/switches exhibit none of these
ideal properties and
performance. Hence, sonically, Halcro feels
that it is worth the side effect of mechanical
clicking sounds when
changed.
detract from
parameters are

Microprocessor control

The excellent audio
complemented and controlled by a number of
highly integrated micro-controllers located
close to the electronics they serve. Being as
near as possible to the controlled electronics
allows short control
eliminates internal connectors, thereby greatly
increasing system reliability.
Each amplifier channel has its own micro-
controller; the front panel display and user
interface has another.
controller, located on the rear connector
panel, co-ordinates the activity of the others.
The four micro-controllers are linked via only
four interconnections each.
A unique programming
microprocessor has been developed which
allows the user to dedicate a particular pair of
input sockets to a specific input device. This
feature provides the user with great flexibility
for connecting input
preamplifier.
The rear panel has provision to accommodate
six input devices into nine physical pairs of
input sockets. There
dedicated phono inputs, one pair of current
inputs, three pairs of balanced inputs and
three pairs of unbalanced inputs. Phono inputs
do not require programming as they are
permanently allocated to the phono source.
6
electronics are
paths and virtually
A fourth micro-
feature of the
devices to the
are two pairs of