Nubert nuBox AS-225, Operating Manual, Page: 9 / 12

2/2019 · nuBox AS-225
9
Operation and Functions
Bluetooth: Pairing
Press the input button on the remote control repeatedly to switch to
the BLUETOOTH input (the LED on the front panel lights or blinks
blue).
Possible states:
LED lights continuously: Active Bluetooth connection
LED flashes slowly: No active bluetooth connection
LED flashes quickly: Bluetooth is in Pairing Mode
Pairing mode can be activated by briefly pressing the pair button
on the remote control. The loudspeaker emits a confirmation tone,
disconnects the current Bluetooth connection and is visible to other
devices. You can now pair with an compatible smartphone, tablet,
or computer. If no pairing is performed within one minute, the AS-
225 returns to the previous operating mode and reconnects to the
last device used.
Bluetooth: Volume control
Virtually all devices that output an audio signal via Bluetooth have
their own volume control. For the best possible quality it is recom-
mended to set the volume of the source device to maximum and
adjust the playback volume with the remote control of the nuBox
active loudspeaker.
Auto power off
The AS-225 has an automatic power off function that cannot be
deactivated. If one of the inputs Bluetooth or AUX is selected, the
loudspeaker switches to standby mode after a maximum of 20 min-
utes without audio input.
With the digital inputs COAX, OPTICAL and HDMI the auto-off cir-
cuit reacts directly to the absence of a digital data stream and thus
allows a faster switch-off. The playback device must deactivate the
data stream accordingly.
Auto power on
The electronics of the nuBox active loudspeaker has an automat-
ic power-on function that automatically wakes it up from stand-by
mode as soon as a sound signal or a digital data stream is present.
This function is only active if the AS-225 has been put into standby
mode by the automatic switch-off function. The signal must be pres-
ent at the input that was selected during the automatic switch-off
process. (This function is not available for Bluetooth devices.)
If standby mode has been set manually by pressing the button
on/off on the remote control, the automatic switch-on function
is deactivated.
HDMI-ARC and CEC
To enable sound transmission from the TV set to the nuBox stereo-
board, both the CEC and the ARC functionality must be activat-
ed on the TV set. Usually this is the default condition and the TV
should automatically detect the speaker. Refer to the TV manual if
necessary.
If these functions are active, both the TV and the remote can control
the volume of the AS-225.
PCM sound format
The nuBox AS-225 uses signals in the „PCM“ format at the digital
inputs. It may therefore be necessary to adjust the settings of play-
ers such as TV sets or game consoles accordingly. To do this, select
“PCM” as the audio output format in the playback menu. Please also
refer to the manual of your player.
Factory Default
To reset the speaker to it’s factory settings, turn the speaker on and
press the mute key x on the remote control for 3 seconds within
the first 5 seconds. The loudspeaker confirms the process with a
green LED and switches to standby mode. At the next start, all set-
tings are in the factory settings.
Construction and technology
Virtual expansion of the stereo stage
A sophisticated DSP algorithm in the nuBox active loudspeakers cal-
culates additional room information which when added to the source
signal, leads to a virtual expansion of the stereo stage. If the music
function is selected on the remote control, this effect is rather soft.
With movie , the ratio of processed information to the original signal
is increased; this mode is recommended especially if a very large
soundstage is desired and the locating precision is less important.
Further applications
Operation with a subwoofer
If your nuBox AS-225 is to be used in combination with a subwoofer,
you can connect it to the SUBOUT output. This output provides a
full-range summed mono signal. The relative volume of the subwoof-
er, its crossover frequency and phase settings must be adjusted at
the subwoofer itself.
If you connect a subwofer to this output, an 80 Hz low-cut is auto-
matically applied to the AS-225 to ensure proper integration between
the AS-225 and the subwoofer.