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Header nuBoxx AS-425 max white with gray front

nuBoxx AS-425 max

  • Guaranteed powerful: 220 watts pulse power and 36 Hz lower cut-off frequency
  • Guaranteed connectivity: thanks to HDMI eARC and Bluetooth aptX HD
  • Guaranteed precision: With Dolby Digital and DTS decoder
  • Guaranteed to be attractive: housing with elegant, lacquered front and magnetic cover
  • Guaranteed load-bearing capacity: Holds TVs weighing up to 50 kg
  • Guaranteed controllable: thanks to the high-quality remote control supplied
  • Guaranteed comprehensible: with our ingenious Voice+ function
  • Guaranteed space-saving: full sound from 86 cm width
nuBoxx AS-425 max white with gray front

Always guaranteed to be right.

Our nuBoxx AS-425 max is a soundplate that can comfortably accommodate a TV weighing up to 50 kg. The TV's loudspeaker system is in for a quiet time as it can practically retire. Acoustically, our nuBoxx AS-425 max takes command, fuelling even action-packed blockbusters with up to 220 watts of impulse power. The 36 Hz lower cut-off frequency ensures a full bass response. Voice reproduction is always clear thanks to the Nubert-exclusive Voice+ function. The built-in Dolby Digital and DTS decoders also ensure that the right sound is always produced from a wide range of content. HDMI eARC and Bluetooth with aptX HD ensure connectivity versatility.

nuBoxx AS-425 mit TV

Experience factor on TV

Just a single HDMI connection between the nuBoxx AS-425 max and the TV and our soundplate is fully integrated into the acoustic action via HDMI eARC. The volume is controlled using the TV remote control. Rich performance and resilient Nubert chassis enable emphatic acoustics for all content.

nuBoxx AS-425 Stereo

Musical surprise

Our soundplate shows its talent not only with film sound, but also with music, and here even in stereo. Nubert has decades of experience in the development of first-class speakers - and this wealth of experience is evident in the nuBoxx AS-425 max with its clear, multi-layered sound.

nuBoxx AS-425 with subwoofer

nuSub „On Demand“

"Who's afraid of the deep bass? Nobody!" If you think so, you should take a look at our nuSub portfolio. Sure, our nuBoxx AS-425 Maxx is already quite powerful thanks to its 36 Hz lower cut-off frequency, but if you add an ultra-flat nuSub SW-800 slim, for example, you'll see little but hear a lot of real, rich bass.

nuBoxx AS-425 PC loudspeaker

PC partner

Our nuBoxx AS-425 max also offers numerous advantages when connected to a PC. On the one hand, a large monitor fits easily on the soundplate. Secondly, acoustic signals can be routed from the PC to the nuBoxx AS-425 max via either analogue or digital channels. And this then provides superb sound.

details


Remote control nuBoxx AS-225 max and AS-425 max

Remote control

The remote control with metal surface is clearly laid out and offers quick access to the inputs, volume, DSP modes, sound control and a Bluetooth pairing button to connect the smartphone.

Wide and Loudness

We have integrated adaptive loudness, which reproduces bass at full volume even at low volumes, and a wide function that makes the sound of the soundbar appear wider. Your advantage: maximum sound with minimum space requirements.

Wide-Sound
Voice+

Voice+ and tone control

Dialogue that is difficult to understand is a thing of the past thanks to our Voice+ function. You can also adjust the bass range as well as the mid-range and treble. Your advantage: always sound to your taste.

Decoder for Dolby Digital and DTS

Many Blu-ray and DVD audio tracks, as well as a wide range of streaming content, are Dolby Digital or DTS encoded. Our nuBoxx AS-425 max has the necessary decoders built in to offer optimum sound quality for these multi-channel formats.

Dolby Audio DTS
nuBoxx AS-425 max black with gray front with and without front panel

Colours

With our black, ice grey and white colour options, you have the choice: a modern two-tone look or classic plain colours in your living room. The body is covered with a durable and easy-to-clean foil surface, while the front has an elaborate lacquer finish. The colour-coordinated fabric cover gives the nuBoxx loudspeakers an elegant appearance.

Design

The simple design makes the nuBoxx models timelessly elegant loudspeakers in the tradition of the classic Bauhaus. The simple attachment of the cover with magnets also follows this school, so that your speaker is optimally protected. The acoustically permeable fabric ensures transparent sound and an elegant look.

Series overview

Our nuBoxx active series has integrated power amplifiers, with which the speakers are immediately ready to play according to the ‘plug and play’ principle. We develop the active speakers in the tradition of our company: outstanding detail fidelity and authentic reproduction of music. This also results in the best possible sound for films, games and TV programmes. For more depth and bass power, we have the nuSub series subwoofers in our range.

nuBoxx Active Series

Safety Instructions


Responsible person

Nubert electronic GmbH

Address

Nubertstraße 1, 73529 Schwäbisch Gmünd, Deutschland

Contact

Email: info@nubert.de Phone: +49 07171 - 8712-0

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.

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 safety-relevant or medical use, installation in open environments like IP-certified products) 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.

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 (info@nubert.de)!

Danger of Suffocation!

Never let children use or play with the 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 (info@nubert.de) immediately:

  • The speaker has been damaged or has fallen down.
  • Power cord or plug is damaged.
  • Objects or liquid have gotten 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 performance.
  • The loudspeaker smells burnt, develops smoke, or makes unusual noises.

Only use accessories recommended by Nubert!

Installation Instructions

Caution!

An unstable location can damage the speaker.

  • Only place the loudspeaker on a flat, stable surface and make sure that it cannot be knocked over!
  • Also make sure that no unintentional pulling can occur on the cables to avoid knocking over the speaker or damaging the connection sockets!
  • Keep strong mechanical shocks away from the loudspeaker!

Caution!

Excessive heat build-up inside the unit can shorten its service life or lead to fire.

  • Never cover the back of the speaker! Make sure that there is a clearance of at least 10 cm and sufficient air circulation in the back area!
  • Do not operate the speaker and remote control near heat sources such as radiators or stoves!
  • Do not expose the speaker and remote control to direct sunlight.
  • Never place burning candles or similar open fire sources on the loudspeaker!

Danger of Explosion!

Installation in unsuitable locations can cause explosions. Do not use the speaker or remote control:

  • in environments where there is a risk of fire or explosion!
  • at extremely low or extremely high temperatures!
  • near flammable gases or vapours!
  • near strong dust!
  • near flammable materials!

Danger of Electric Shock!

The loudspeaker carries mains voltage and voltages higher than 35 V AC or DC inside. It has no special protection against the intrusion of liquids or objects into the system. There is therefore a risk of lethal electric shock.

  • Never touch the speaker with wet hands!
  • Only use the speaker in a dry place!
  • Do not operate it outdoors or in damp rooms!
  • The loudspeaker must be protected from liquids of all kinds, including dripping and splashing water.
  • Do not place any containers containing liquids (e.g., flower vases) on the speaker or in the immediate vicinity!
  • If the loudspeaker is moved from a cold environment to a warm room, condensation may form inside the unit. Wait at least six hours until the loudspeaker has reached room temperature and is dry before switching it on!
  • No objects of any kind may get into the device.
  • Should the loudspeaker come into contact with liquids or should objects have gotten inside, please unplug the mains plug immediately and contact Nubert electronic GmbH (info@nubert.de)!

Danger of Injury or Damage!

For speakers with threaded bushings on the underside:

The threaded bushings may be used for upright mounting of the loudspeaker on suitable base plates or feet only. The threaded bushings on the underside of the loudspeaker enclosures are not designed for tensile loads and must therefore not be used as holders for hooks or similar devices in order to suspend the loudspeaker cabinet. A falling speaker may cause serious injury and damage.

Connection Instructions

General Connection Instructions

  • Disconnect the mains plug before changing any wiring on the system!
  • Make sure that all connections have been made correctly and that all plugs are firmly seated in the sockets before connecting the speaker to the mains.
  • Use only the intended cables or plug connections for the connections! Failure to do so may result in damage or malfunction.
  • If you want to disconnect connections on the loudspeaker, always pull the plug, never the cable!
  • Ensure that all plugs are firmly seated in the sockets!
  • Only use cables and accessories recommended by Nubert!

Danger of Electric Shock!

Faulty mains supply systems or excessive mains voltage can lead to electric shocks.

  • All power supply or antenna systems connected to the loudspeaker must comply with all applicable laws and regulations and be professionally installed by an approved installation company.
  • Use only the appropriate power cord to connect the speaker. Do not modify the power cord or its plug.
  • Make sure that the mains voltage at your location matches the requirements of the loudspeaker! The correct power supply can be found on the label on the back of the speaker. It must not be connected to other power supplies.
  • Devices of Class 1 construction must be connected to the mains power socket outlet with a protective earth connection. Make sure that the installation of the protective earth is carried out correctly!
  • When laying the power cables, make sure that they cannot be damaged (e.g., by heating or mechanical stress)! Pay particular attention to the areas of the connectors and distributors!

Caution!

Overvoltage in the power supply system (e.g., due to lightning) can damage or destroy the device and power supply unit.

  • An overvoltage protection element can provide a certain degree of protection against excessively high voltages in the power grid.
  • However, the greatest possible protection against damage can only be achieved with the complete separation from the mains supply. In case of thunderstorms or danger of lightning strikes, disconnect the mains cable from the socket and any antenna plugs from your hi-fi system!
  • If the speaker is not used for a long period of time or is unattended, the power supply should be disconnected. Disconnect the mains plug from the socket!

Remote Control and Battery

This product comes with a remote control and a battery. The following must be observed when handling remote controls and batteries:

  • If the batteries are discharged, the range of the remote control will decrease significantly. If this happens, replace the batteries immediately.
  • Always use high-quality CR2025 lithium button cells as replacement batteries.
  • Make sure that the polarity is correct when inserting the battery into the battery compartment!

Caution!

Improper handling can lead to material damage.

  • Do not drop the remote control!
  • Do not expose the remote control and battery to water or other liquids!
  • Do not operate or store the remote control and battery in locations with high humidity or particularly high or low temperature!

Danger!

Leaking or exploding batteries can pose a health hazard and cause damage to goods.

  • If you do not use the device for a long time or if the batteries are depleted, remove the batteries from the remote control to prevent discharge, leakage of acid, or explosions.
  • Leaking batteries must be replaced immediately.
  • If you find a leaking battery, do not touch the leaking material and dispose of the batteries immediately!
  • Do not touch leaking batteries!
  • Should your skin, eyes, or mouth come into contact with the leaking material, clean the affected area immediately with water and contact a doctor!

Danger! Do Not Ingest Battery, Chemical Burn Hazard!

Ingestion of batteries can cause severe internal burns and death within a short time span.

  • Ensure that batteries do not get into your body by any means, in particular that they cannot be swallowed!
  • Keep new and used batteries away from children.
  • If the battery compartment does not close securely, stop using the product and keep it away from children.
  • If you think that batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention!

Note: Equipment marked with this symbol must not be disposed of with household waste. Refer to the Disposal and Battery Return section at the end of this manual.

Care and Cleaning Tips

Caution!

Improper handling of the speaker may result in damage.

  • Always unplug the speaker before cleaning it!
  • Before recommissioning, make sure that all connections are correct, that there are no short circuits, and that the speaker is completely dry.
  • Never use strong cleaning agents or solvents such as petrol, spirit, or similar!

Enclosure

We recommend commercial window cleaner sprayed onto a cotton cloth. This allows almost all fingerprints and dust to be easily removed. Alternatively, you can also use window active foam.

We advise against the use of microfibre cloths! These can cause mini scratches in the surface.

Diaphragms and Speaker Chassis

To remove dust from a loudspeaker chassis, a lint-free cotton cloth is sufficient to wipe the membrane lightly with very little pressure.

nuBoxx in a soundproofed room

Committed to honest sound

We are a German company that has been developing and selling speakers directly for 50 years. We stand for neutral reproduction so that you receive exactly the same signal that is present on the source. We add nothing and leave nothing out. We promise! You can find more information about our philosophy here.

Nubert Speaker Factory

Quality management

All nuBoxx models are thoroughly tested by us in Schwäbisch Gmünd to ensure that you receive a perfect product. We check the appearance, technology and sound for the best results for you.

Almost Good

This product as 2nd choice

In some installation locations - for example with rearspeakers behind a curtain - the visual appearance plays a subordinate role, but the function must be guaranteed without restriction. Here, our 2nd choice is the ideal solution for price-conscious customers. These are exhibition items, customer returns or discontinued models with minor signs of use, but which have been technically inspected by our service department. We also give a full 2-year guarantee on the 2nd choice.

nuReality App

Your purchase, our service

Whether before or after you buy, our customer service is here to help. If you have any questions about products, your order, returns or installation, our expert support team will help you quickly and easily. By email or phone, if you prefer. Because good service makes all the difference.

Nubert listening room nuBoxx

Committed to honest sound

We are a German company that has been developing loudspeakers and selling them directly for over 45 years. We stand for neutral reproduction, so that you receive exactly the signal that is present on the source. We add nothing and leave nothing out. That's a promise! You can find more information about our philosophy here.

Nubert Gebäude

German engineering expertise

Perfected by our developers at the Schwäbisch Gmünd site: Our nuBoxx series offers affordable access to the world of hi-fi sound - and already at a very high level. Every nuBoxx speaker fascinates with an amazingly full-bodied and broadband sound that leaves nothing to be desired.

nuReality App

nuReality - AR App

Bring High End into your home in advance with our Augmented Reality App. Our 360° view or our AR mode offer final details for your desired loudspeakers in your own four walls.

Google Play

Apple Store

Listen to it now in our stores!

Test results


We are awarded. And proud of it.

Testsiegel-Icon

Smart sound wonder

nuBoxx AS-425 max - unrivalled price-performance ratio
HiFi.de Icon

Außergewöhnlich kräftige Klänge

nuBoxx AS-425 max: für ereignisreiche Fernsehabende
audiovision Highlight Icon

Leserwahlen 2023

Zwei Siege und Beste Marke bei Audiovision
HiFi Test Highlight Icon

Gerät des Jahres 2023

nuBoxx AS-425 max ausgezeichnet
avf Bild Icon

Klang und Verarbeitung erstklassig

nuBoxx AS-425 max - konkurrenzloses Preis-Klang-Verhältnis
Roast Award Icon

Sounddeck des Jahres

nuBoxx AS-425 max - ausgezeichnet mit dem ROAST-Award 2022/23
Stiftung Warentest Icon

Testsieger aus Schwäbisch Gmünd - 2

nuBoxx AS-425 max: GUTer Zweiter - nuPro AS-3500: Testsieger bei Stiftung Warentest
Modern HiFi Icon

Einfach guter Klang

nuBoxx AS-425 max verspricht maximale Einfachheit: perfekt abgestimmt zum TV-Schauen und für Musik
World Smarthome Award Icon

World Smart Home Award

nuPro AS-425 max: Siegerin World Smart Home Award
Techstage Icon

Super Klang ohne Subwoofer

nuBoxx AS-425 max: trotzt nur so vor Spielfreude
guide.ch Icon

Eindrückliche Kino-Soundkulisse

nuBoxx AS-425 max: Eindrückliche Soundkulisse
Video Icon

Die perfekte Begleiterin

nuBoxx AS-425 max: perfekte Begleiterin
Low Beats Icon

All-In-One-Lösung

nuBoxx AS-425 max: sucht Seinesgleichen
Audio Test Icon

Ehrlicher und kraftvoller Klang

nuBoxx AS-425 max: wirklich potente Speaker
Heimkino Highlight Icon

Was will man mehr?

nuBoxx AS-425 max: Was will man mehr?
audiovision Highlight Icon

Klingt richtig gut

nuBoxx AS-425 max: neutral und ausgewogen
i-Fidelity Icon

Maximale Power, maximale Spielfreude

nuBoxx AS-425 max: Maxissimo!
konsolenfan Icon

Konsequente Fortführung des Erfolgs

nuBoxx AS-425 max: absolutes Multitalent
avmagazin Icon

Optimale Wohnraumintegration

nuBoxx AS-425 max: Kraftvoller Klang
Satvision Icon

Maximaler Fernsehspaß

nuBoxx AS-425 max: Bestnote „sehr gut“
Area DVD Icon

Klanglich starkes Sounddeck mit hochwertiger Technik zum fairen Preis

nuBoxx AS-425 max: Starkes Sounddeck
Plus X Award Icon

Plus X Award für die nuBoxx-Serie

nuBoxx-Serie: High Quality

Accessories


We not only build exceptional loudspeakers and electronics, but also offer the matching accessories. So you can find everything useful for our products, from cables to adapters.

Skip product gallery

Average rating of 5 out of 5 stars

in-akustik Premium MP3 Audio Cable
Premium jack to stereo cable
€24.99 / Piece

in-akustik Star 2.1 HDMI
HDMI cable
€18.49 / Piece

nuCable Digital Pro
High End Coaxial Cable
€23.00 / Piece

Content: 1,5 Meter (€15.33 / 1 Meter)

Staywired Pro Flex
Organisational talent
€10.50 / Piece

Content: 0,3 Meter (€35.00 / 1 Meter)


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€695.00 / Piece

FAQ



Questions about soundbars

It usually helps to check the TV manual and look for the keywords "HDMI CEC" and "HDMI ARC". Often there are only small settings to be made in the TV menu, such as selecting the external audio system for sound output. We are also happy to help on the phone.

We give a 2-year warranty on soundbar speakers. You can find exact details of our conditions here. However, we also offer a warranty extension to a total of 5 years, you can find all the info here.

In most cases, the error can be solved by selecting the right source on the TV or by increasing the volume. We will be happy to help you via telephone +49 7171 87 12 0 or E-Mail according to the motto "Doesn't sound, doesn't exist". Because for us, good service is part of the product.


Reviews


34 of 34 reviews

4.91 / 5

Average rating of 4.9 out of 5 stars


5
4
3
2
1

Honest speakers - Honest reviews

Satisfied? Or can we do something better with our products? Then write us your review. Simply log in to your account and write the review of your order here.

Here with us, every review is checked for authenticity and is then approved. So you can be sure that the feedback you give us about our products is genuine.

Holger

15 September 2024

Average rating of 5 out of 5 stars

Nach zwei Jahren nach wie vor sehr zufrieden!

Hans-Dieter

20 March 2024

Average rating of 5 out of 5 stars

Besser geht nicht!

Thomas

2 March 2024

Average rating of 5 out of 5 stars

Perfekt

Gottfried

9 November 2023

Average rating of 5 out of 5 stars

Ein High End Monster

Sven

15 October 2023

Average rating of 5 out of 5 stars

Endlich perfekt!!!

Rolf

9 April 2023

Average rating of 5 out of 5 stars

Tolles Gerät, die nuBoxx AS-425

Andreas

18 March 2023

Average rating of 4 out of 5 stars

Guter Einstieg in die Welt der Soundbars!

Manuel

15 March 2023

Average rating of 5 out of 5 stars

Genau so wie beworben!

Helge

9 March 2023

Average rating of 5 out of 5 stars

Wirklich überzeugend!!!!

Stefan

28 December 2022

Average rating of 5 out of 5 stars

Perfekte Soundanlage

Technical information


Subject to technical changes.

Box type, sound and recommended use

The nuBoxx AS-425 max is the right soundbar for all series junkies, film enthusiasts, music fans and gamers who want to enjoy modern home entertainment to the full. It gives blockbusters from Hollywood a cinematic sound backdrop, brings a stadium atmosphere into the living room during sports broadcasts and fascinates its audience with music playback in HiRes quality.

The nuBoxx connects to televisions, games consoles or streaming players as well as traditional home cinema or hi-fi players. Smartphones, tablets or laptops can be easily connected wirelessly via Bluetooth. The AS-425 max therefore not only impresses sound lovers as a TV soundbar, but also as a multifunctional stereo system, following in the tradition of its legendary predecessor, the nuPro AS-250.

The nuBoxx AS-425 max is just as flat as the compact nuBoxx AS-225 max and fits easily on or even in most pieces of furniture. However, the soundbase is around 50 per cent wider than its little sister. This has several advantages: Firstly, the nuBoxx AS-425 max also provides a secure stand for televisions with a screen diagonal of more than 40 inches. Secondly, the wider baffle now houses four instead of two bass-midrange drivers. And thirdly, the internal acoustic volume has been significantly increased. In combination with the powerful 160-watt digital amplifier, this results in a much fuller sound image with more powerful bass and a more vivid stereo panorama.

For music playback, we recommend the integrated ‘audio zone extension’, which creates an additional, more vivid stage image at the touch of a button. The ‘Voice+’ sound mode is available especially for films and TV programmes, which clarifies speech reproduction and makes dialogue or commentary clearer. Other sound settings allow you to boost the bass and treble reproduction or intensify the low-frequency pressure at low levels (loudness).

In addition, the nuBoxx AS-425 max scores with an integrated decoder for Dolby Digital and DTS Digital Surround sound formats - perfect for reproducing Blu-rays, TV programmes or videos from streaming services such as Netflix or Amazon Prime Video in the best possible sound quality and optimising them for two-channel output.

Setting up and operating the nuBoxx AS-425 max is child's play. The soundplate is simply connected to an ARC- or eARC-compatible output on the TV set using an HDMI cable. This not only transmits sound signals, but also allows basic functions such as volume control to be accessed via the TV remote control. More detailed settings can be made using either the soundbar's illuminated rotary knob or the high-quality remote control supplied.

The flat design, the high-quality foiling of the housing and the removable, magnetically attached fabric cover ensure that the nuBoxx soundbase blends unobtrusively into the living environment. With the colour combinations of black, white-ice grey and white, there is a suitable design for almost every interior style.

So if you're looking for a compact, elegant yet great-sounding soundbar that not only audibly enhances games, films and TV programmes, but also functions as a modern streaming system, the nuBoxx AS-425 is the perfect choice.

Design principle and housing

As a fully active two-way soundbar, the nuBoxx AS-425 max houses an active crossover and a total of four powerful digital amplifiers, each with a continuous output of 40 watts, two for the left and two for the right channel. The digital operating principle enables precise separation and equalisation of the frequency ranges, which explains the good bass performance of the comparatively compact soundplate.

The speaker cabinet is made of 19-millimetre-thick medium-density fibreboard (MDF), which reliably reduces resonances and promotes a clean sound image. Thanks to its stable construction, the nuBoxx AS-425 max can support TV sets weighing up to 50 kilograms. The two bass reflex ports are located at the rear of the system. The body of the cabinet is finished with a high-quality decorative film in white or black, the baffle has a silk matt lacquer finish. The removable, magnetically attached front cover is covered with optimally permeable acoustic fabric.

The nuPro AS-425 max is a fully active all-in-one sound system. This means that the soundbar connects directly to the TV, satellite receiver or Blu-ray player, but also to games consoles, smartphones or hi-fi players and reproduces film sound, sound effects or music. The soundplate uses a digital amplifier with 160 watts of nominal power and 220 watts of music power. The signals are prepared and processed by a powerful digital processor.

The nuBoxx soundbase works as a stereo system with a left and a right channel. The wide baffle favours a three-dimensional stage effect, which can be further extended using the integrated wide circuit (‘audible zone extension’). The ‘Voice+’ speech focus is also on board, especially for films and TV programmes, which enables clearer voice reproduction. Purists can enjoy unadulterated two-channel sound.

Chassis

Two modern silk fabric dome tweeters with a diameter of 25 millimetres, which are specially manufactured for Nubert and have already proven themselves in previous nuBox models, are responsible for the high frequencies. The bass and mid frequencies are reproduced by two 118 millimetre long excursion drivers, which are also used in the smaller nuBoxx AS-225 max. Because the nuBoxx AS-425 max uses two drivers and also relies on more volume and a more powerful amplifier, it achieves audibly higher levels than its little sister and is therefore also recommended for larger rooms and listening distances.

Operation and setting options

The stereo board can be operated either via the remote control or using the rotary switch on the front of the device, whereby the most important operations such as volume control can also be easily accessed via the TV if it is connected via the HDMI (e)ARC input. The supplied remote control, which is characterised by its high-quality feel and elegant design, allows quick access to the various sound settings of the soundbase.

Multi-coloured LEDs arranged around the rotary knob are used as operating indicators, which provide clear information about the selected input and the status of the device and can also be easily seen through the removable fabric cover.

Tone control

The various sound options of the nuBoxx AS-425 max allow the reproduction to be adapted to personal taste, the sound material or the spatial requirements. The setting options include bass and treble control, a dynamic soundness circuit to increase the bass pressure at low levels and a two-stage ‘audiophile extension’, which effectively widens the stereo stage. The ‘Voice+’ function, which emphasises the centre channel and the frequencies relevant for voice reproduction, is particularly useful for films and television programmes. This increases speech intelligibility in sub-optimally mixed programmes and in quiet playback.

Connections

The connection panel of the nuBoxx AS-425 max has four audio inputs. The HDMI port (version 2.1), which supports the current eARC standard but is also compatible with older ARC devices, is recommended for connecting to the TV. This interface not only transmits sound signals, but also control commands. This means, for example, that the output volume of the soundbar can be adjusted using the TV remote control.

An analogue RCA input, an optical-digital (TOSLINK) and an electrical-digital (SPDIF) input allow the connection of additional players such as satellite receivers or games consoles. For an extra dose of bass, the nuBoxx AS-425 max also has a subwoofer output that can be used to drive a woofer from the Nubert nuSub range, for example (transfer frequency: 80 Hertz). Last but not least, the nuBoxx soundplate has an integrated Bluetooth receiver for connecting wireless players such as smartphones or tablets, which allows music streaming in high-resolution quality thanks to support for aptX HD (Android) and AAC (iOS).

The nuBoxx AS-425 max not only reproduces sound in PCM format, but also decodes Dolby Digital (AC3) and DTS Digital Surround. The soundplate is therefore ideally equipped to play back soundtracks from Blu-ray discs, DVDs or streaming videos and optimally prepare them for stereo playback. If necessary, the correct format, the correct output and the ARC function must be activated on the player.

Energy

This soundbar is equipped with a convenient automatic energy-saving function that switches the speaker on automatically or puts it into energy-saving stand-by mode when not in use. In this stand-by mode, which can also be activated manually using the remote control or rotary knob, the sound system consumes less than 0.5 watts. The nuBoxx AS-425 max can also be completely disconnected from the mains using a rocker switch. The wide-range power supply allows this active speaker to be used with mains voltages from 110 to 120 and 230 to 240 volts.

More information in technology ‘full’

For all technically interested music and home cinema enthusiasts who are not put off by hard facts and metrological details, Günther Nubert's ‘Technik satt’ offers plenty of technical context and electro-acoustic background knowledge as well as the topic of sound optimisation and insights into the development and history of Nubert loudspeakers and devices.