smooth joints between metal parts while screws every 6cm ensure protection against electromagnetic interferences.
Four stainless steel feet support the unit. Each foot ends with an elastomer ring to sit on delicate surfaces but is also equipped with
height adjustable hardened steel spikes to fine tune the unit position. Horizontal leveling is accomplished using the provided
screwdriver through the four adjustment shafts accessible from the top of the unit. Moreover, the steel spikes serve as vibration
evacuation channels in a stack of units. Special covers are provided to interface with the spikes of the unit above. Any vibration
from the upper unit is transmitted by the stacking cover to the shaft of the lower unit and from there to the lower unit's feet or
spikes, forming a privileged path for vibrations evacuation.
1.4 Power supply
The power supply of the L1 is a linear supply with multiple independent local regulations circuits.
The largest mains transformer is an oversized toroidal transformer and is used to supply power to the local regulation circuits,
which in turns, supply both preamplifier boards. The transformer also supplies power to the digital areas of the amplifier (front
panel display, microcontroller and DSPs that control and monitor the unit).
Discrete (power-transistor and operational amplifier based) ultra low noise regulators are used throughout the power supply to
ensure the purest low noise DC feed possible to the different audio sections. Each preamplifier board enjoys dedicated analog
regulators.
The second, smaller toroidal transformer inside the L1 is used as the Standby transformer to ensure green Standby mode, meeting
the latest energy saving regulations.
Both transformers have static shields between primaries and secondaries. They are mounted on a separate steel plate which is
isolated from the main base steel plate by silent blocks to prevent vibration transmission to the rest of the unit.
Input AC voltage to the power supply can be set to 100V, 115V or 230V AC depending on your local mains voltage.
Rev 1.0 L1 User Manual 11
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