Simaudio Neo 430HA Headphone Amplifier Manuel d'utilisateur télécharger pdf (Page 9)

430HA Headphone Amplifier

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The two (2) buttons labeled ◄ INPUT ► allow you to

sequentially scroll, either forward (►) or backward

(◄) through all of the available inputs. Depending

on whether or not the DAC option is installed, the

order of the inputs is as follows going forward (►):

Basic Unit: “A1”, “A2” and “B1”

DAC option installed: “A1”, “A2”, “B1”, “D1”, “D2”, “D3” and “D4”

The above abbreviations correspond to the labeling

of the rear panel inputs. “A1”, “A2” and “B1” are

intended for use with any type of source component

that outputs an analog signal: “A1” and “A2” for

single-ended sources using RCA connectors; “B1” for

balanced sources using XLR connectors. If you have

installed the DAC option, “D1”, “D2”, “D3” and “D4”

will appear after “B1”.

The “Mute” button mutes the output signal to the

headphone outputs, as well as both the fixed and

variable line output connectors (refer to the section

entitled “Rear Panel Connections” for further

details). As well, the volume level setting will no

longer appear in the display widow. Pressing the

“Mute” button a second time will reinstate the

volume back to its previous level. When the output

signal is muted, the red LED to the right will

repeatedly flash on and off. Note: Adjusting the

volume level while the “Mute” function is active will

immediately de-activate the “Mute” function.

The

Nēo 430HA is

Energy Using Product (EuP)

compatible. This is a European standard that

effectively limits the off and standby power

consumption to no more than 0.5W. When the

EuP

function is active, the unit will automatically turn off

after 20 minutes of inactivity. The “Mute” button

allows you to activate and de-activate the

EuP

function as follows;

press and hold the “Mute”

button for approximately 3 seconds to toggle

EuP

(default setting) or off. The display will show "EuP"

or "No EuP", respectively, whenver the

EuP

setting

changes. The

EuP

setting is maintained when the

430HA is both powered down and placed into

“Standby” mode.

The “MP” button (for Media Player) has its input

connection located above the headphone jack for

easy access. It uses a 1/8” mini-jack connector

which is the most common type of connection found

on portable media players. When selected, the

corresponding red LED, located to the right of the

button, will illuminate. When the “MP” input is in use

the display window automatically turns off. The

“Display” button allows you to turn the digital

display on and off.

The rotary “volume” control determines the volume

level, which ranges from ‘0.0dB’ (no output) to

’80.0dB’ (full output). This control does not function

like a typical volume: When you rotate the dial,

either clockwise to raise the volume or counter-

clockwise to lower the volume, you are actually

engaging a precision optical encoder which selects

very high quality metal-film resistors that the audio

signal passes through. The result is a proprietary

volume circuit, called M-eVOL2 that doesn’t

degrade the audio signal regardless of the setting,

unlike

all potentiometer based circuits. Since this

circuitry operates in a fully balanced differential

mode, no noise is introduced to the audio signal.

Furthermore, there are no actual moving parts, so

this technology has a minimum life expectancy of

one million rotations. The Nēo 430HA Headphone

Amplifier provides a range of five-hundred and thirty

(530) unique volume settings. This is achieved as

follows: Within the 0.0dB to 30.0dB range, you can

increase and decrease the volume in 1.0dB steps.

From the 30.0dB to 80.0dB range, you can increase

and decrease the volume by either 0.1dB or 1.0dB

steps; By rotating the volume control slowly, the

level will change by 0.1dB increments. A quicker

rotation will change the volume in 1.0dB increments.

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Simaudio Neo 430HA Headphone Amplifier Manuel d'utilisateur Page 9

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