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LC audio Millennium - Power Supply & Schematic; Power Supply Design Considerations

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The End Millennium
L C Audio Technology
7
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 m uch 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.
63V
63V
10.000u
63V
10.000u
63V
10.000u
63V
10.000u
63V
63V
63V
10.000u
63V
10.000u
63V
10.000u
63V
10.000u
63V
4u7
PC
4u7
PC
4u7
PC
4u7
PC
2A bridge
35A bridge
2A bridge
35A bridge
YELLOW
YELLOW
ORANGE
ORANGE
RED
RED
BLACK
BLACK
30 VA Auxillary
Transformer
5-700 VA Main
Transformer
AUX +
AUX -
MAIN +
GND
MAIN -
Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.
The AUX Supplies are used
for the voltage amplifier
and the driver stage.
These two 4u7 are marked
on the PCB but normally
not mounted on the PSU,
because they are now placed
on the amplifier boards.