halcro-logic dm10 Benutzerhandbuch

Page 6 of 29

dm10

Audible relay noise

The dm8 & 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 detract from performance.

Hence,

sonically, HALCRO™ feels that it is worth the side effect of mechanical

clicking sounds when parameters are changed.

MICROPROCESSOR CONTROL

By Paul Rainbow

The excellent audio electronics are 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 paths and virtually 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. A fourth micro-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 feature of the 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 devices to the preamplifier. The rear panel has provision to

accommodate six input devices into nine physical pairs of input sockets. There

are two pairs of 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.