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The NAC 252 descends from the NAC 52 - still one of the
finest preamplfiers ever manufactured. It brings both control and
connectivity advances over the NAC 52, and a significantly enhanced
construction, aesthetic and finish. Its performance, too, is
enhanced with the benefit of a decade of R&D bringing yet more
speed, detail, transparency and music.
Many designs were explored and a complete review of the
circuit topology and components took place in accordance with the
developments pioneered in the NAC 552. Hundreds of hours were spent
listening to various designs, ensuring that the harmony between
music and technology was always maintained.
Improved earthing arrangements have resulted in an
entirely new circuit topology, built upon a single very high
quality, anti-resonance main audio circuit board. Anti-vibration,
resonance-controlling feet compliment the ingeniously slotted and
suspended main circuit board to protect the sensitive internal
components from resonance and microphonic vibration.
Carefully matched precision rotary potentiometers with
precious metal wipers are used to ensure long-term stability and
preserve music integrity.
Ten independently regulated power supplies are fed from
the matching Super-Cap power supply. Totally separate regulated
supplies for the digital control and switching ensure no noise is
generated in the audio circuits.
The NAC 252 features a silent microprocessor that
sleeps during listening and controls all aspects of the amplifier
including optical protection circuits that continuously monitor the
power supplies ensuring safe shut down in the event of a power cut,
and the user configurable 'Smart IR' system remote control.
In addition to the preferred DIN plug inputs the NAC
252 owner can configure two of the inputs for use with the more
common RCA phono connectors, allowing a wide range of non-Naim
cables and components to be used. A user-configurable unity-gain
input is provided for use with the AV2 processor or similar.
Each of the six inputs feature separate listen and
record facilities. In addition to the usual record mute, the NAC 252
mutes not only the output but also powers down all associated record
circuitry, eliminating any possibility of degrading the main output.
- Six line-level inputs including two user-configurable
versatile (DIN / phono) inputs.
- User configurable unity-gain AV input.
- Powered input for use with Stageline or Prefix phono stage.
- Full infrared remote control.
- RC5 input for wired remote control in complex installations.
- Optional RS232 input / output for use in full home automation
systems.
- The Naim Super-Cap power supply provides each of the ten audio
circuits with an independent regulated power supply.
- Separately regulated power supply for the digital control and
switching circuitry.
The Naim NAC 252 combines stunningly musical and
accurate hi-fi reproduction with extensive flexibility to ensure it
will remain at the heart of top quality systems for many years to
come. |
