(1) External power supply input. For X1 optional external power supply only
(2) Mains switch and power cord receptacle (on back panel)
(3) Adjustment shafts and screws
(4) Mains filter board
(5) Power supply section
(6) Main power transformer
(7) Standby power transformer (ensures green mode standby)
(8) Front panel power supply board
(9) Display (on front panel)
(10) Balanced and single-ended outputs
(11) Balanced and single-ended inputs
(12) Control board (USB plug for firmware update and Ethernet RJ-45 plug for control from Android App)
(13) Single-channel preamplification board (one or two per unit)
(14) Backplane board
(15) Power supply regulation board
(16) Dual concentric control knob with pushbutton
1.1 Unmatched flexibility
The L1 offers unmatched system integration flexibility. Not only can it be used in multiple configurations (Dual Monaural,
Monaural, and Monaural Extended) but it also allows adjustments to match the impedance of the upstream unit, improving the
overall signal transmission with the surrounding pieces of equipment.
1.1.1 Configurations
A single L1 can be fitted with one or two channel boards, depending on the desired configuration. The following configurations can
be realized:
• Dual Monaural: In this configuration, a single L1 is used to hold the two channels (Left and Right, Center and Sub or Left
and Right surround). Two boards are fitted inside its chassis, each one independently processing a single channel. The
mains power supply section is common to both the board, however separate dedicated DC regulation circuits are provided
to each board.
• True Monaural: In this configuration, two L1s are used to hold a single channel each (Left resp. Right, Center resp. Sub or
Left resp. Right surround). One board is fitted inside each chassis, each L1 processing a single audio channel. In this
configuration, the entire power supply of the L1 is dedicated to one channel, further enhancing the system performances.
• True Monaural Extended: The configuration is identical to the True Monaural configuration, with the addition of a second
board in each chassis. The two boards in a chassis work together, as if it was only one board with twice as many inputs
(and outputs). This configuration will be used when more inputs are required than the amount a single board can
provide.
For ultimate results, one/two X1 External Power Supply unit(s) can be connected to the L1(s) in all the above configurations,
adding a second stage of power supply regulation to the preamplifiers, further improving the system performances.
Rev 1.0 L1 User Manual 9
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