background image

 

Device approval and conformity

with EC directives

Nubert electronic GmbH hereby declares that this product complies with the 

2014/53/EU directives, provided that it is installed and used in accordance with 

the manufacturer‘s instructions. The full text of the EU Declaration of Conformity 

is available at the following Internet address: 

https://www.nubert.de/konformitaetserklaerungen/716/

•  Do not change the serial number on the speaker. It is part of the operating 

approval. 

•  If the loudspeaker is repaired or modified by workshops or other third parties 

not authorized by Nubert, it loses its operating license.

•  Only accessories and devices may be connected which in turn comply with all 

legal requirements and are approved.

•  The loudspeaker may only be used for the applications specified in the „In-

tended Use“ section

Intended use

This speaker is designed exclusively for sound reproduction in dry rooms. Use 

the speaker only as described in this manual. Any other use (particularly safe-

ty-relevant or medical use, installation in open environment like IP-certified prod-

ucts) is considered improper and may result in property damage or even personal 

injury. Nubert electronic GmbH does not assume any liability for damages caused 

by improper use. 

Safety instructions

The entire operating manual, in particular the safety instructions, must be read 

in full before connecting and commissioning the device. For your own safety, 

be sure to follow all warnings and safety instructions in this manual and on the 

speaker. The user is not permitted to carry out any work on the loudspeaker 

other than the described work. Keep this document so that you have access to 

it at all times. Furthermore, it must also be handed over to possible re-owners.

Key to the symbols

 The triangle symbol with exclamation mark (without additional comment) 

indicates important instructions for commissioning, operation and maintenance 

of the device. 

The term 

Caution!

 next to the triangle symbol indicates a medium risk. Failure 

to observe this warning may result in property damage.

The term 

Danger!

 next to the triangle symbol indicates a high risk. Failure to 

observe this warning may result in death or personal injury

 This symbol indicates that you must read and observe the operating 

instructions and the safety and warning notices in order to operate the device.

 This symbol (triangle with lightning) warns of dangerous voltages inside 

the enclosure and of hazards due to electric shock.
 

 This symbol indicates that the device complies with electrical protection 

class 2 and therefore does not require earthing.

 Devices with this symbol may only be used in a dry indoor environment.

 Equipment marked with this symbol must not be disposed of with house-

hold waste. Refer to the Disposal and Battery Return section at the end of this 

manual.

General information

 

 Never operate the loudspeaker unattended! 

 

Danger of electric shock!

To avoid the risk of electric shock, the speaker may not be opened by the  

user. There are no user-serviceable parts inside the speaker. 

Service  work  and  repairs  are  reserved  for  qualified  specialists  authorized  by  

Nubert. If you need service, please contact Nubert electronic GmbH directly  

([email protected])!

 

Danger of suffocation!

Never let children use or play with neither speaker, remote control or packaging 

unattended. There is a risk that children will get caught in the packaging film 

and suffocate. Make sure that children cannot remove any small parts from the 

devices! These parts, like the remote control battery, could be swallowed and 

cause suffocation. In case of swallowing any parts, contact a doctor immediately!

 

Danger of injury or damage!

When moving the speaker, take care to avoid injury and damage!

 

Caution!

Since the speaker can only be completely disconnected from the mains at the 

mains input on the rear of the unit or by pulling the mains plug from the socket, it 

must be positioned so that you have free access to the mains input or mains plug.

If any of the following situations occurs, the loudspeaker must be switched off 

immediately and disconnected from the mains. Contact Nubert electronic GmbH 

([email protected]) immediately!

•  The speaker has been damaged or has fallen down.

•  Power cord or plug is damaged

•  Objects or liquid have got into the loudspeaker

•  The speaker has been exposed to excessive moisture or rain.

•  The speaker does not work properly or exhibits a significant reduction in per-

formance.

•  The loudspeaker smells burnt, develops smoke or makes unusual noises.

 

Caution!

The drivers built into this loudspeaker generate a strong magnetic field in their 

immediate vicinity, which can impair or damage other devices. It is therefore 

essential to keep magnetically sensitive devices away from this loudspeaker! Do 

not place tube screens, notebooks, hard disks or the like on the speaker!

 Only use accessories recommended by Nubert!

Low temperatures and Sound

When speakers are shipped and delivered during the cold monthsof the year, 

it is imperative that they adapt to the temperature of the living area. Low 

temperatures have a considerable influence on the moving parts of a loud-

speaker such as diaphragm, voice coil,bead and spider. The ability of these 

components to follow rapid oscillations or to perform large excursions is thus 

significantly restricted.This is not dangerous, but “frozen” speakers are far 

from their acoustic peak.

Hence our tip:

 When your new speakers arrive on a cold winter’s day, just 

give them a few hours to acclimatise. Your Nubert speakers will thank you with 

the superior sound quality you have come to expect from us.

2

nuPro AS-250 

·

 

4/2020 EN 

Thank you for purchasing a  

nuPro active loudspeaker!

If you read this manual carefully, setting up  

your new speaker is quick and easy.

We will explain the setup, the connections,  

and the daily operation so you can achieve  

the best possible sound quality and get  

the most out your new nuPro loudspeaker.

The Nubert team wishes you  

many hours of musical enjoyment!

Summary of Contents for nuPro AS-250

Page 1: ...Active Stereoboard Operating manual Setup Connections Technical data nuPro AS 250 With USB power supply for external devices ideally suitable for wireless receivers and more...

Page 2: ...ger of electric shock To avoid the risk of electric shock the speaker may not be opened by the user There are no user serviceable parts inside the speaker Service work and repairs are reserved for qua...

Page 3: ...ntenna systems connected to the loudspeaker must com ply with all applicable laws and regulations and be professionally installed by an approved installation company Use only the appropriate power cor...

Page 4: ...ush with the shelf or protrudes slight ly This allows the loudspeaker to radiate the sound freely into the room and helps to avoid voices sounding like coming through a funnel Ideal horizontal listeni...

Page 5: ...omplete sound system in a single cabinet All cables must be connected before switching the AS 250 on All source devices are connected on the back of the AS 250 Optionally you can also connect an activ...

Page 6: ...the Playback devices entry Alternatively in the Control Panel go to the entry Sound 3 A window with available playback devices opens a The nuPro speaker appears as Lautsprecher USB Audio DAC on the l...

Page 7: ...s 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...

Page 8: ...ver frequency n SYS HP High pass and crossover frequency In this menu you can set the high pass lo cut filter frequency This is particularly useful if you connect a subwoofer to your nuPro speaker Use...

Page 9: ...sensitivity adjustment Max Input 3 5 V Stand by power consumption 0 5 V Max Samplerate USB 16 bit 48 kHz S PDIF optical 24 bit 96 kHz S PDIF electrical 24 bit 96 kHz Dimensions H x W x D 15 5 x 70 x...

Page 10: ...e mid and high frequencies MENU 11 dB 0 dB 11 dB 12 dB BASS or 12 dB Raise or lower the bass level MENU 11 dB 0 dB 11 dB 12 dB BAL or L 9 dB Adjusts the relative level between the left and the right c...

Page 11: ...unplug the speaker before cleaning it Before recommissioning make sure that all connections are cor rect that there are no short circuits and that the speaker is com pletely dry Never use strong clean...

Page 12: ...le Disposal and battery return Environmental protection Ingredients e g chemical pollutants in old appliances can damage the environment and health if stored improperly in particular if they are not s...

Reviews: