Power Supply Considerations - LC audio Millennium User Manual

Power Supply Considerations.

The Power Supply is crucial for the sound quality!
If You are going to design the perfect audio power supply, the most appealing option is to
use a battery of the great performing (Swedish made) RIFA power capacitors of 100.000
uF each. Combine with blocking coils to remove charging peaks and You have the best
practical Audio Power System.
However the price and size of this approach makes it less appealing to your view of
sensible money and space utilization. It is too expensive and takes up as much space as a
small refrigirator. Therefore we have designed the Super Power Supply, to use intelligent
design to weigh up for the size and simplicity of the RIFA solution.
120.000 uF of Low Impedance American made ChemiCon cans configured with a separate
supply for the sensitive signal amplifiers, so any dips in the main power caused by
extreme loading, will not affect the input and driver circuits.
Also a set of Poly Carbonate caps eliminate high frequency noise from the rectifiers.
YELLOW
ORANGE
30 VA Auxillary
Transformer
RED
BLACK
YELLOW
ORANGE
5-700 VA Main
Transformer
RED
BLACK
The End Millennium
2A bridge
4u7
10.000u
PC
63V
2A bridge
4u7
10.000u
PC
63V
35A bridge
10.000u 10.000u
63V 63V
35A bridge
10.000u 10.000u
63V 63V
7
AUX +
The AUX Supplies are used
for the voltage amplifier
and the driver stage.
AUX -
10.000u 10.000u 10.000u
63V 63V 63V
10.000u 10.000u 10.000u
63V 63V 63V
L C Audio Technology
MAIN +
4u7
PC
GND
These two 4u7 are marked
on the PCB but normally
not mounted on the PSU,
because they are now placed
4u7
on the amplifier boards.
PC
MAIN -