User manual HALCRO LOGIC DM8

[. . . ] dm8 TM TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ELECTRONIC DESIGN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 MICROPROCESSOR CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Output selector switch: Allows the user to select the type of output required, Balanced, Unbalanced and Current. see Comments on the different dm8 Outputs (page 14). Page 12 of 26 dm8 Connections Connecting to a power amplifier TM Each dm8 has: 2 pairs of unbalanced current outputs. 1 pair is used in un-bridged mode and both are used for driving bridged amplifiers, 2 pairs of unbalanced voltage outputs and 2 pairs of balanced voltage outputs. Select the method you wish to operate your power amplifiers in, and connect the 2 units using high quality cables. Outputs are color coded: Positive +, Right channel (Red Bezel). The dm8 will control power amplifiers from balanced and unbalanced voltage sources, as well as an unbalanced current source. The dm8 will also control power amplifiers in bridged pair configuration. Custom made cables are required to run bridged power amplifiers from the balanced Voltage Output. (Fig 7). Figure 7 Comments on the different dm8 Outputs The balanced voltage outputs or current-mode outputs are most desirable for minimising earth loop generated mains hum and ripple, or high frequency interference if they are a problem. Earth loop generated mains hum and ripple, or high frequency interference should not be a problem unless the source equipment is poorly designed. Power Amplifiers with current-mode inputs are rare and are most likely to have an RCA input socket. The advantages of this are: Y Y Earth loop generated mains hum and ripple are minimized. Cable, plug and socket-generated interference is minimized (from poor connections which may be affected by sound vibration for example). The unbalanced output is quite satisfactory so long as earth loop generated mains hum and ripple are not a problem. Page 13 of 26 dm8 Remote Power Amplifier control Output TM The dm10 has a remote power amplifier control output (fig 6, 15) which will remotely switch the HALCROTM amplifiers from Standby to On. Cables can be purchased through HALCROTM for details please email us at: service@halcro. com . Bridging The dm8 will control bridged power amplifiers. For details please email us at: service@halcro. com A bridging kit can be purchased through HALCROTM. Break-in period The dm8 does not require a break-in period. The electronic break-in period is completed at the factory. Programmable Input Selections The dm8 has seven available pairs of programmable input connectors, three unbalanced, three balanced voltage inputs and one unbalanced current input. All inputs that have a signal source connected must be programmed by the remote control. Any input can be programmed to connect any source. Each button on the remote control can have only one signal source programmed to it at any time. [. . . ] The warranty period will commence at the date of purchase, not at the date the warranty registration form is received by HALCROTM. Return authorization from HALCROTM prior to shipment must be obtained for any warranty requirements. To obtain this authorization, please ask your dealer or email HALCROTM at service@halcro. com . The original packaging must be used for shipping for warranty or service requirements. [. . . ]