Simaudio Neo 430HA Headphone Amplifier Manuel d'utilisateur télécharger pdf (Page 12)

430HA Headphone Amplifier

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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 communication features

between various MOON components. For example,

if you were to connect the Nēo 260D to the

430HA via the SimLink™, pressing the X (play)

button on the Nēo 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.

If you are using the “MiND” Music Streamer and

your 430HA includes the “DAC” option, you must

make a SimLink™ connection between the “MiND”s

SimLink™ out and the 430HA’s SimLink™ in. When

you press the X (play) button on the “MiND” App,

the 430HA will automatically switch to the input

labeled ‘D2’. You can change this default setting for

the “MiND” as follows: Select the input (‘D1’ or ‘D3’)

that you want as the new default for “MiND”, then

press and hold the INPUT X (right) button for 3

seconds, until the front panel display briefly shows

‘Str’.

If you are using the “MiND” Music Streamer and an

external DAC, you need to make a SimLink™

connection between the “MiND”s SimLink™ out and

the 430HA’s SimLink™ in. You must assign this

default setting as follows: Select the analog input

that you want as the default for the MiND, then

press and hold the INPUT X (right) button for 3

seconds, until the front panel display briefly shows

‘Str’. When you press the X (play) button on the

“MiND” App, the 430HA will automatically switch to

the default ‘Str’ input. If you have previously created

a default input for ‘CD’, ensure that you use a

different analog input for the “Str” default.

The connection rules for the SimLink™ are very

basic. You must always connect the supplied cable

between one component’s SimLink™ Out jack and

another component’s SimLink™ In jack. If you

inadvertently connect the cable between either two

SimLink™ In or two SimLink™ Out jacks, the

SimLink™ communication feature may not function.

Also, there is no master component in a SimLink™

chain; no one particular component operates as the

main communications controller.

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Simaudio Neo 430HA Headphone Amplifier Manuel d'utilisateur Page 12

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