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Nº 320S Getting Started
adjustments in 1.0dB increments up to 23.0dB and in 0.1dB
increments above 23.0dB.
Unlike most stereo preamplifiers, the Nº 320S is designed to
integrate with multi-channel surround sound processors without
the complications associated with competing stereo and multi-
channel master volume controls. SSP (surround sound processor)
mode allows the Nº 320S to deactivate its master volume control
to send line-level input signals to the associated processor. With
no interference from the Nº 320S, the processor controls the
relative volume level of all channels, allowing it to maintain its
carefully calibrated levels.
Following the Mark Levinson tradition, the Nº 320S exceeds all
reasonable expectations for a stereo preamplifier. Its flexible
design – including seven configurable inputs, separate main and
record output connectors, and complete surround sound processor
integration – allow it to accommodate a wide range of demands.
Even more, a series of advanced techniques shield audio circuits,
resulting in an incomparable sound befitting sophisticated music
reproduction systems.
Highlights • 7 configurable inputs
• Maximum channel separation
• Advanced dual-mono design
• Multi-channel surround sound processor integration
• 3 balanced (female XLR) and 4 single-ended (Mark Levinson-
designed RCA) input connectors
• Separate main and record output connectors
• Independent power supplies, communication circuits, and
audio circuits for each channel
• Effective noise suppression and isolation techniques
• AC power filtering
• 2 active voltage regulation stages for audio circuit sections
• Independent power supplies for audio circuit and control circuit
sections, each with its own low-noise toroidal transformer
• Faraday shield between AC power line and low-voltage
secondaries
• 2 proprietary discrete volume attenuators
• Deactivation of unused inputs to eliminate ground-loop noise
(continued)