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EN 4/2020
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nuPro AS-250
The remote control of the nuPro allows direct access to all common-
ly used functions:
n
on
With this key, you toggle the speaker between active and stand-by
mode.
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volume
and
mute
The volume can be adjusted with the volume keys, the mute key
allows you to mute and unmute the speakers.
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bass
and
mid/high
The remote control also allows easy adjustment of the sound cha-
racter of the AS-250. The mid/high keys are used to raise and lower
the bass intensity, while the mid/high keys can be used to adjust the
mid/high range by up to ± 12 dB. See the section “Tilt Control” below
for more information.
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usb · aux · spdif
With these keys, you select the source you wish to listen to. USB
selects the USB input, aux the analog input. Pressing spdif toggles
between the electrical and the optical digital inputs.
When handling the remote control:
Make sure the battery is inserted correctly, observing the polarity
of the battery. If you need to replace the battery, always use a high
quality CR2025 battery.
Remote Control
Construction and technology
Tilt Control
The midrange/treble adjustment of the nuPro loudspeakers has the
characteristics of a so-called “Tilt control”. While standard treble
controls “bend” the frequency response and thus produce colour-
ations, this control continuously affects the frequency response in
a linear fashion. This perfectly preserves the basic tonal character
of the loudspeaker and the harmony of the sound image. The Mid/
Hi tone control allows an increase or decrease of the frequency
response with a maximum of 12 dB at 20 kHz.
Autogain
After being powered on, the AS-250 sets the input sensitivity au-
tomatically. For this reason, it is important that you connect your
sources and let them play for few seconds before switching the
AS-250 on. If the voltage of the signal increases too much during
playback, the input sensitivity is automatically lowered. You can de-
activate this function in the menu (see page 9, section “AGAIN”).
Digital Signal Processing
For maximum fidelity, the signal path of a nuPro loudspeaker is
kept entirely digital: Digital input signals go straight to the digital
signal processor (DSP), which then performs crossover functions
and optimization of the frequency response. Analogue sources are
first converted to a digital signal by high-quality A/D converters.
The signal remains digital all the way into the power amplifiers for
best possible precision and signal to noise ratio.
Latency compensation
Due to the digital signal processing, a slight delay is introduced,
so-called latency. If you connect additional nuPro loudspeakers to
the link-output, this delay is automatically compensated for in order
to ensure the best possible time-alignment. The result is an optimal
stereo image with precise voice location (see page 9, section “fur-
ther use cases”).
Sound format
The digital inputs of your nuPro loudspeakers accepts PCM-format
signals only. It may therefore be necessary to adjust the settings of
players such as TV sets or game consoles accordingly. To do this,
select “PCM” as the output format in the playback menu. Please
also refer to the manual of your source device.
Auto-on/off function
The auto on/off function reacts differently, depending on the select-
ed input: If no signal is present at the analog input, the loudspeaker
is switches to stand by after 20 minutes. As soon as an analog
input signal is detected, the speaker switches back on. At the other
inputs, the activity of the connected source is monitored, allowing
the loudspeaker to switch off or on instantly. At the SPDIF and Op-
tical digital inputs, the presence of the digital data stream is moni-
tored, while at the USB input the presence of USB supply voltage
is detected.
The auto-on function is only active if the loudspeaker was set to
standby by the auto-off function. To wake up the loudspeaker, a
signal must be present at the input that was selected when the
loudspeaker went into standby
Note:
Morn computers often have USB sockets that deliver con-
stant voltage (e.g. for charging a mobile phone) even when the
computer is switched off. If you want to use the auto-on function of
your nuPro active loudspeakers in conjunction with the USB input,
you must use a USB connector that powers off with the computer.
Remote control signals, AS-250 and the nuPro A-series.
The remote-control signals of the AS-250 and the nuPro A-series
loudspeakers do not cause interference with each other, making
it possible to use combinations of these systems without acci-
dentally operating the wrong speaker. (see page 9)
