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The nuBox AS-225 alternative

The new nuBoxx AS-225 max offers a wider range of sound settings, including Voice+ and Dolby decoding, for a small extra charge.


Header nuBox AS-225

nuBox AS-225

  • Better sound for movies, games or music with dynamics, thanks to 160 watts of power
  • More space: at 60 cm width suitable as a TV pedestal for devices up to 40 kg
  • Get started and experience sound: easy operation via supplied remote control
  • Ideal TV speaker with HDMI ARC and CEC - to control with the TV remote control.
  • Convinces with Bluetooth 4.2 with aptX and Wide function in movie and music mode
  • Foiled case with noble lacquered front and magnetic bezel

Winner soundbar

The nuBox AS-225 is a soundplate, which is the name of a soundbar with more volume and the ability to place a TV up to 40 kg on the speaker. The soundbase not only significantly enhances the TV sound with its stereo sound, but can also replace a compact hi-fi system. A subwoofer, for example from the nuSub series, is connected via the subwoofer output.

nuBox AS-225 mit TV

Upgrade for the TV

As a classic upgrade for the TV, the nuBox AS-225 provides more volume and clearer voices on the TV. When connected via HDMI ARC, you can also conveniently control the volume with the TV remote control. Alternatively, further connection options are available with an optical and an analogue input.

nuBox AS-225 Stereo

Smart stereo

The nuBox AS-225 was developed for the greatest possible detail reproduction and is therefore also suitable as a replacement for the classic stereo system. Your favorite tracks can arrive via an existing CD or network player through the digital inputs, or streamed from your smartphone with Bluetooth aptX.

nuBox AS-225 mit Subwoofer

Subwoofer combination

36 Hz lower cutoff frequency means plenty of low end and bass. If even more bass is desired for the next movie spectacle, we recommend a model from the nuSub-Series. Simply connect the soundbar with cable and it separates at 80 Hz and the subwoofer takes care of the rest. Your advantage: For the next party, there are even more level reserves.

nuBox AS-225 PC-Lautsprecher

For gaming and music

Even on a PC, a nuBox AS-225 can serve as a base for a monitor and significantly enhance the sound. Via the optical or coaxial input, you can bring games and music to the soundbar in a lossless digital way, or alternatively via the RCA inputs in an analog way.


Fernbedienung nuBox A-125 und AS-225

Remote control

The remote is clear and provides quick access to inputs, volume, DSP modes, and a Bluetooth pairing button to connect your smartphone.


We have integrated the DSP modes Music and Movie to extend the width of the stereo stage. Your advantage: This way, the soundbar sounds wider to you than it is.

Consistent stereo design

The nuBox AS-225 has a maximum total output of 160 watts with individually developed chassis for best channel separation in stereo operation. Your advantage: This makes music a real pleasure.

PCM signal

We process stereo PCM and no Dolby or DTS signals. This can be set in any TV and also provides excellent sound. Your advantage: no unnecessary license costs for the best price/performance ratio.


With our color options of graphite, black, ice gray and white, you have the choice: modern two-tone look or classic solid colors in your living room. The carcass is covered with a robust and easy-to-clean foil surface and the front is elaborately lacquered. The color-coordinated fabric trim gives the nuBoxx speakers an elegant appearance.


The simple design makes the nuBoxx models a timeless work of art in the tradition of the classic Bauhaus. This school is also followed by the simple attachment of the bezel with magnets, so that your speaker is protected in the best possible way. The acoustically permeable fabric ensures transparent sound and elegant appearance.

Series overview

Our nuBoxx active series has integrated power amplifiers, with which the speakers are immediately "Ready to Use". We develop them in the tradition of our company: the best possible detail for music. This results in the best sound for movies, games and TV shows. For more low end, we have the nuSub-Series subwoofers in the range, which provide even more bass.

Nubert Hörraum nuBoxx

Committed to honest sound

We are a German company that has been developing and selling speakers directly for over 45 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 Gebäude

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.

Zweite Wahl

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

nuReality - AR App

Bring the high end into your home in advance with our augmented reality app. Our 360° view or our AR mode provide the final details for your favourite speakers in your own four walls.

Google Play

Apple Store

Nubert Hörraum 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.

Unter 500 Euro gibt es wahrscheinlich nichts Besseres

nuBox AS-225: gibt nichts Besseres

nuBox AS-225 ist Testsieger bei Stiftung Warentest 07/2020

nuBox AS-225: Testsieger Stiftung Warentest 7/20

"Gute" Soundbar mit "ausgezeichnetem" Preis-Leistungs-Verhältnis

nuBox AS-225: Preis/Leistung ausgezeichnet

Eines der besten Sounddesks seiner Klasse am Markt

nuBox AS-225: Exzellent, Note 8/10

HIFI.DE Award: Sieger und "beste Soundbar bis 400 Euro"

nuBox AS-225: Sieger bei den Awards

"Soundbar des Jahres"

nuBox AS-225: Leserwahlsieger bei Audiovision 3/20

"Best of Hifi Test 2020" - und "echte Kaufempfehlungen"

nuBox A-125, A-225, 425 Jubilee: Best of HiFi Test 2020

Bester Klang fürs Geld

nuBox A-125 und AS-225: "Bester Klang fürs Geld"

Großer Sound zum kleinen Preis

nuBox AS-225: Sehr gut

Pfundig dynamisch

nuBox AS-225: Pfundig dynamisch


nuBox AS-225: PowerBar

Großartiger Sound zu überraschend wenig Geld

nuBox AS-225: kleine Box ganz groß!

Ehrlicher DSP-Klangprofi

nuBox AS-225: Kraftvoller Spitzenklang für unter 400,-

Großer Sound zum großen Bild

nuBox AS-225: Sehr gut/Oberklasse

Geniales Soundsystem für TV-Sound und HiFi

nuBox AS-225: Preistipp!

Klanglich über jeden Zweifel erhaben

nuBox AS-225: Sehr gut!

Erstklassiges Sounddeck ... durchweg empfehlenswerte Audiolösung

nuBox AS-225: erstklassiges Sounddeck

Preisattraktiv ... glänzt mit einfacher Bedienung und tollem Klang

nuBox AS-225: Preisattraktiv!

Bietet ausgezeichneten Stereo-Klang, vielseitige Anschlüsse sowie ein sehr gutes PLV

nuBox AS-225: Preistipp mit "sattem Stereo-Sound"

Schicke TV-/HiFi-Lösung für spektakulären Klang

nuBox AS-225: TV-/HiFi-Lösung für spektakulären Klang

Klangstark, hervorragend abgestimmt, preiswert

nuBox AS-225: klangstark und preiswert

Unglaublicher Klang für unter 400 Euro

nuBox AS-225: Kauftipp + Highlight


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.

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
€12.50 / Piece

Content: 0,5 Meter (€25.00 / 1 Meter)

Wall shelf WA-4
Wall shelf
€89.00 / Piece

Not the right one? We recommend taking a look at related products that you might like.

Bluesound NODE
Network Player
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Cambridge Audio AXC35
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Denon DCD-600NE
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nuSub XW-700
Tiny low end power
€495.00 / Piece

nuSub XW-800 slim
Slim desing low end
€585.00 / Piece

nuSub XW-900
Low end for enveryone
€695.00 / Piece


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, WhatsApp or E-Mail according to the motto "Doesn't sound, doesn't exist". Because for us, good service is part of the product.


4 of 24 reviews

5 / 5


Honest speakers - Honest reviews

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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.


25 April 2024



18 February 2023

Geplant, enttäuscht und doch hoch zufrieden!


3 March 2021

nuBox AS-225


12 February 2021

nuBox AS-225

Technical information

Subject to technical changes.

Box type, sound and recommended use

The nuBox AS-225 sound deck puts an end to the tinny, pale sound of modern flat-screen TVs! Designed as a more compact, less expensive alternative to the multi-award-winning nuPro AS-250, our new soundbar finally gives your TV screen a cinema-worthy soundstage! To do this, it simply moves under your TV, which it also serves as an attractive and space-saving base. The connection is best made via HDMI cable to a suitable HDMI ARC output of the TV. This has the added advantage that you can now control the volume with the TV remote control.

The soundbar's two digital and analog inputs can also be used to connect other players, such as game consoles, Blu-ray players or satellite receivers. Smartphones and tablets connect wirelessly via Bluetooth. Therefore, the nuBox AS-225 is also suitable as a compact sound system that can convincingly replace a small stereo system. Even HiRes recordings bring the nuBox AS-225 to the fore!

In the Music mode, the Soundboard outputs either unadulterated two-channel sound or simulates a wider acoustic stage by means of the DSP circuit "Audible Zone Extension" - perfect for living room concerts. The Movie mode, on the other hand, is recommended for room-filling sound reproduction for TV shows and movies - ideal for speech intelligibility and exciting sound effects.

The nuBox AS-225 is set up in just a few steps, connected - and you can already enjoy sound fascination! The control is done with the supplied remote control conveniently from the listening position.

Note: In order for the soundbar to output the sound of the TV, game console, Blu-ray player or similar player correctly, the sound format of the output device must be set to "PCM" or "Stereo". The device does not have a decoder for surround tracks. "Dolby", "DTS", "Bitstream" and similar formats are therefore not processed.

Design principle and housing

As a fully active two-way soundbar, the nuBox AS-225 uses an active crossover and a total of four powerful digital amplifiers with 40 watts of music power each, one for each of the four loudspeaker chassis or frequency paths. The digital operating principle enables precise separation and equalization of the frequency ranges, which accounts for the good low-frequency performance of the comparatively compact soundbar.

The speaker cabinet is made of 19 millimeter thick medium-density fiberboard (MDF), which reliably reduces resonances and promotes a clean sound image. Thanks to the stable construction, the nuBox AS-225 supports TV sets weighing up to 50 kilograms. The two bass reflex ports are located on the rear of the system. The housing body is equipped with a high-quality decorative foil in white or black, the baffle has a satin finish. The removable, magnetically adhering front cover is covered with optimally permeable acoustic fabric.


The nuBox AS-225 uses two 118-millimeter woofers and two 25-millimeter tweeters, both of which were specially developed for the nuBox A series speakers and have impressive performance values for their size class. For example, the soundboard owes its impressive lower cutoff frequency of 36 Hertz (at -3 decibels) to both the precise DSP control and the tuned long-throw woofers. And the textile dome tweeters are characterized by excellent omnidirectional sound distribution and particularly fine resolution.

Operation and setting options

Die Steuerung der Lautsprecher der nuBox A-Serie erfolgt mit der beiliegenden Fernbedienung. Acht Tasten erlauben direkten Zugriff auf alle wichtigen Funktionen: Eingänge, Lautstärke, Klangmodus, Stand-by, Stummschaltung und Bluetooth-Pairing. Eine mehrfarbige Leuchtdiode gibt Auskunft über den Betriebszustand:

  • Blue: Bluetooth
  • Green: Aux (analog)
  • Red: Optical (digital)
  • White: Coax (digital)
  • Purple: HDMI ARC

Thus, the active speaker permanently displays the selected input. Received commands are acknowledged with a short flashing of the LED. In energy saving mode, the light goes out. The nuBox AS-225 has an automatic switch-on function, with which it reacts to signals of the last selected input. If the stand-by is triggered manually, the automatic is deactivated.

If the active speaker is connected via HDMI cable to a source that has an audio return channel (ARC), the volume can also be controlled via the remote control of the external player.

Tone control

The nuBox AS-225 is neutrally tuned and outputs true-to-original two-channel sound at the factory. In addition, during the sound tuning, emphasis was placed on the best possible speech intelligibility and a wide sweet spot. If an even more effective reproduction is desired, pressing the Movie button on the remote control activates a special DSP circuit, which increases the spatiality of the reproduction and makes the sound events seem more three-dimensional - ideal for movies and TV shows. The Music mode, on the other hand, is recommended for music playback. The effect expands the acoustic stage and immerses the listener even deeper into the sound experience. We call this "listening zone expansion". Pressing the respective keys again deactivates the effects.


The soundbar features five audio inputs and one output. There is an optical digital and an electrical digital connection, an HDMI ARC port, an analog stereo RCA connection and a Bluetooth receiver for wireless connections. Thus, users enjoy almost free choice when it comes to the feed player: Almost all modern media systems can be connected, from classic CD players, multimedia computers, game consoles and TVs to mobile multi-talents such as smartphones or tablets.

A sub output is available for connecting an external subwoofer. If this is activated, the lower cut-off frequency of the nuBox AS-225 is raised to 80 Hertz, which increases the level reserves.


The nuBox AS-225 is equipped with a convenient automatic energy-saving feature that switches the speakers on independently or puts them into power-saving standby mode when not in use. In this stand-by mode, which can also be activated manually via the remote control, the speakers consume less than 0.5 watts. The wide-range power supply allows these active speakers to be used on mains voltages from 110/120 to 230/240 volts.

Mehr Infos in Technik

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