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8
N
0
526 / N
0
523 DUAL-MONAURAL PREAMPLIFIER / OWNER’S MANUAL
GETTING STARTED
Output Connectors
Balanced output connectors:
these XLR 3-pin connectors
provide a line-level left-channel and right-channel signal that
can be used to send the selected input to power amplifier
inputs, a powered subwoofer, or to recording components.
Mark Levinson recommends using the Balanced outputs as the
primary output if your amplifiers offer balanced inputs.
Single-ended output connectors:
these RCA connectors
provide a line-level left-channel and right-channel signal that
can be used to send the selected input to amplifier inputs, a
powered subwoofer, to a second listening zone, or to recording
components.
The Balanced and Single-ended outputs can be configured
in the Setup menu as Fixed (for use with recording
components or a second audio zone). When outputs are
configured as Fixed, they are not affected by any of the
front-panel controls.
By default the Balanced and Single-ended outputs
are confirmed as as Variable. When so configured, the
Balanced and Single-Ended outputs will follow the settings
of the Volume, Balance and Mute controls. The Headphone
output is always variable.
Additionally, if you would like to include a powered
subwoofer in your system, you can restrict the low
frequencies sent to your main speakers by engaging the
unit’s 24dB-per-octave Butterworth 4th-order 80Hz high-
pass filter, which can be applied to either the Balanced or
Single-Ended outputs.
For further information on configuring these parameters,
see the Setup Menu section of this manual.
Input Connectors
Balanced analog input connectors (1, 2):
these connectors
accept left-channel and right-channel balanced input signals
from source components with balanced (male XLR) output
connectors.
Balanced connector pin assignments:
• Pin 1: Signal ground
• Pin 2: Signal + (non-inverting) “hot”
• Pin 3: Signal – (inverting) “cold”
Balanced
Input Connector
(female XLR)
Pin
3
Pin
3
Pin
1
Pin
1
Pin
2
Pin
2
Balanced
Output Connector
(male XLR)
Single-ended input connectors (3, 4, 5):
these connectors accept
left-channel and right-channel single-ended (unbalanced)
input signals from source components without balanced output
connectors. Mark Levinson recommends using balanced
connections whenever possible.
Phono input connectors:
these connectors accept left-channel
and right-channel input signals from turntables with moving-
magnet or moving-coil cartridges that do not have a built-in
preamplifier. Connect the turntable output cable’s grounding
terminal to the preamplifier’s ground pin by loosening the
threaded collar, inserting the terminal, and tightening the collar
using your fingers only. Do not tighten the ground pin collar with
tools.
N
0
526 only:
Digital input connectors: the N
0
526 has six digital audio
input connectors:
• One AES/EBU Balanced XLR, numbered 1
o Mark Levinson recommends using the
Balanced connection whenever possible.
• Two Coaxial S/PDIF RCA, numbered 2 and 3
• Two Optical S/PDIF TOSLINK, numbered 4 and 5
• One Asynchronous USB Type B, numbered 6
o The USB connection is used for streaming
audio from your computer.
Control Connectors
Micro USB connector:
this connection enables the unit to be
connected to a computer for internal webpage discovery. When
the unit is connected to power and network, the preamplifier
will mount to the PC as a mass-storage device containing a
hyperlink to its internal web page for configuration and status
monitoring.
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