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Owner's Manual
The Nēo 430HA headphone amplifier has two (2) pairs
of single-ended outputs on RCA connectors, labeled
'FIX' and 'VAR', located next to the "B1" balanced input.
The 'FIX' output is intended as an input to a recording
device such as a cassette tape deck or CD-Recorder
Player. Keep in mind that the output level is fixed and
cannot be adjusted by the 430HA's volume control. The
'VAR' output is designated for output to a power
amplifier with single-ended RCA inputs. Don't hesitate to
use high quality interconnect cables*. Poor quality
interconnect cables can degrade the overall sonic
performance of your system.
For Nēo 430HA's equipped with the DAC option, you
will find 4 digital inputs labeled D1, D2, D3 and D4. The
D1 input is on an optical Toslink connector; both the D2
and D3 inputs are on a S/PDIF connector; the D4 input is
on a USB type B connector.
Below the area reserved for the optional digital inputs
are a series of input/output connectors for custom type
installations: From left to right there are two (2)
"SimLink™" connectors labeled "in" and "out" on 1/8"
mini jacks. Please refer to the next section entitled
SimLink™ for more details. Next, there's a 1/8" mini-jack
input for use with aftermarket infrared remote control
receivers. Then there's a 12V trigger output on a 1/8"
mini-jack that can power up a connected component
(with a 12V trigger input) at the same time that the
430HA is powered up. Next, there's a full-function bi-
directional RS-232 port for custom integration or
automation on a DB9 connector. Finally on the far right
side is the main power switch ("0"=off, "1"=on) and the
IEC receptacle, labeled "AC Power" for the included AC
power cord.
Connect the supplied AC power cable to the IEC
receptacle, located on the headphone amplifier's rear
panel. Ensure that the AC wall outlet you use has a
functioning ground. For the best sonic performance, it is
preferable that you plug your 430HA directly into a
dedicated AC outlet and avoid using an extension cord.
If you have the time and willingness, consider installing
a superior quality AC wall outlet such as a hospital grade
Hubbell*.
* Please speak with your MOON Authorized Retailer about the
benefits of high quality cables for your system, and superior
quality AC wall outlet.
Balanced Operation
The Nēo 430HA includes one (1) balanced line-level
input and three (3) balanced headphone outputs on
XLR connectors. The "B1" input uses a fully balanced
differential circuit, intended for use with source
components that output a fully balanced differential
signal. The Nēo 430HA balanced inputs and outputs
takes full advantage of the benefits of balanced
circuitry:
When using an unbalanced interconnect, the audio
signal runs through both the center wire and the
shield/ground wire.
Any noise picked up by this
interconnect (ie. nearby magnetic fields such as an AC
power cord) will be reproduced by both the
preamplifier and amplifier, then heard through the
loudspeakers. Conversely, a balanced interconnect has
three separate conductors; one for the ground and two
for the actual signal. These two signals are identical
except that one is 180 degrees out of phase with the
other. For example, when one conductor is carrying a
signal of +2 Volts, the other will be carrying a signal of –
2 Volts. When these two inverted signals on a balanced
line are output from the Nēo 430HA, any noise picked
up by the interconnect will be eliminated since a
differential circuit amplifies only the difference between
these two signals: Noise on a balanced interconnect will
be equal on both conductors and therefore cancel out.
SimLink™
The
SimLink™
provides
between various MOON components. For example, if
you were to connect the Nēo 260D to the 430HA via
the SimLink™, pressing the
260D will cause the 430HA to automatically switch to
the input labeled 'A2'. You can change this default
setting as follows: Select the input that you want as the
new default, then press and hold the ◄ INPUT (left)
button for 3 seconds, until the front panel display briefly
shows "CD".
Another feature of SimLink™ involves the "Standby"
function. By pressing down and holding the "Standby"
button for approximately 3 seconds on the either the
Nēo 260D or 430HA, both units will go into "Standby"
mode. The same logic applies when switching from
"Standby" to active mode.
communication
features
(play) button on the Nēo
11
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