1
Contents
Introduction ................................................2
Important Safety Information...................3
Symbols ......................................................... 3
Electrical safety............................................. 4
Protection from fluids .................................. 4
Service warnings .......................................... 5
Protection from overheating ...................... 5
Lifting or moving ........................................... 6
Wiring to the loudspeaker terminals to
Class 2 wiring (US wiring regulations) ....... 6
Additional Important Safety Instructions
for US .......................................................... 7
Interference Warning - US FCC
Regulations ................................................8
For Consumers within the European
Union: ..........................................................9
Installation................................................. 10
Unpacking ....................................................10
Storing packaging .......................................10
Positioning ....................................................10
Controls and Connections...................... 11
Connecting the loudspeakers ...................11
Connecting the external ground ...............11
Connecting the mains supply cable..........11
Break-in period .............................................11
dm78 Inputs .................................................12
dm88 Inputs.................................................13
Operation ................................................. 14
Electronic Protection and Reliability ..... 15
Components................................................15
Output Current Limiting ..........................16
Output transistor protection...................... 17
Unusual output conditions......................... 18
Power supply output current limiting ....... 18
Internal power supply protection.............. 18
Mains transient overload protection ........ 18
Input overload protection .......................... 18
Amplifier inter-stage protection ................ 18
dm78 Specifications................................19
dm88 Specifications ...............................21
Care and Maintenance .......................... 24
Cleaning....................................................... 24
Troubleshooting...................................... 25
Service and Warranty Information ....... 26
Overview ..................................................... 26
Product warranty ....................................... 26
Exclusions to the warranty ....................... 26
Transferability.............................................. 27
Warranty verification .................................. 27
Warranty registration ................................. 27
If service is required ................................... 27
Transportation of products....................... 28
Freight damage claims.............................. 28
If you have moved ..................................... 28
Thank you for choosing Halcro!............... 28
