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Roth Audio Sub Zero II review



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Roth Audio Sub Zero II
  • Roth Audio Sub Zero II
  • Roth Audio Sub Zero II
  • Roth Audio Sub Zero II
  • Roth Audio Sub Zero II
  • Roth Audio Sub Zero II
  • Roth Audio Sub Zero II
  • Roth Audio Sub Zero II


Our Score:



  • Loud, detailed sound
  • Tight, well integrated bass
  • Robustly built


  • Basic control system
  • Occasionally strident at loud volumes
  • No HDMI inputs or USB port

Key Features

  • 60W power output
  • MA DSP Movie, Music and Voice modes
  • Built-in Bluetooth with apt-X
  • Four 2.5in Ferrite drivers and two passive bass radiators
  • Optical, RCA and 3.5mm minijack inputs
  • Manufacturer: Roth Audio
  • Review Price: £149.99

What is the Roth Audio Sub Zero II?

As the name suggests, Sub Zero II is the successor to the Roth Sub Zero, a soundbar designed to boost audio quality from terrible-sounding TVs without the need for a separate subwoofer (see what they did there?). It does this by squeezing a bunch of active and passive bass drivers into the soundbar’s slender frame, making it perfect for rooms where space is tight. Roth reckons this new incarnation builds on the performance of its predecessor and throws in a few extra features, including Bluetooth and DSP sound modes – all of which sounds pretty tasty for just £150.

SEE ALSO: 10 best soundbars you can buy

Roth Audio Sub Zero II

Roth Audio Sub Zero II – Design

Sub Zero II is a solidly built and tastefully designed soundbar. Its robust reinforced polymer cabinet is covered in a classy black cloth that keeps everything clean and minimal. At just 850mm wide it’s ideally suited to TVs between 32 and 47-inches, and it can be mounted on the wall using the supplied brackets or on a tabletop.

It’s worth noting that Sub Zero II is a different animal to its predecessor. Gone are the slanted Vector Firing side drivers and Fractal Expansion technology – this version takes a simpler forward-firing approach.

Roth Audio Sub Zero II

The front-mounted control panel is now smaller and more discreet, but its rudimentary feel betrays its budget price tag, opting for lights and hard, clicky buttons where others might use LED readouts and touch-sensitive controls. Still, that’s perfectly acceptable at this price.

The panel features a large power button and four other keys to control inputs, sound modes and volume. The volume level is indicated by a row of five purple lights, which are quite hard to see from the sofa. These LEDs disappear when idle.

Roth Audio Sub Zero II – Connections

Rear connections are strictly old-school, with no HDMI inputs to be seen, but an optical digital input allows you to pipe audio from your TV (and any sources connected to it).

It’s joined by stereo RCA input and a 3.5mm minijack. You should connect your TV’s headphone output to the latter if you want to control volume with your TV’s remote, but connect via optical or RCA to use Sub Zero II’s remote.

There’s no USB port for playback of audio files but again we refer you to that £150 price tag. This line-up is more than adequate for what is essentially an extension of your TV’s speakers.

Roth Audio Sub Zero II

Roth Audio Sub Zero II – Features

Sub Zero II’s standout feature is built-in Bluetooth with apt-X, which offers a step-up in performance over regular A2DP technology. Streaming music from phones, laptops or tablets couldn’t be simpler.

Sub Zero II’s driver array includes four 2.5in ferrite drivers – two bass, two full range – plus a pair of ‘Ultra-Bass’ passive radiators. The Class D amplifiers kick out 60W of power, while Roth’s MA DSP (digital signal processor) offers three sound presets – Movie, Music and Voice.

James Kearnes

November 15, 2013, 9:22 am

I purchased the original Sub Zero after I read the review on Trusted
Reviews and have to say I am very happy with it.

However, I would have thought with the addition of Bluetooth this second
model would have warranted a higher rating? Why has it only received the same
rating but with extra benefits?
What’s not as good???

Alex Walsh

November 15, 2013, 10:34 am

perhaps the competition have caught up a bit? I could never get away with wall mounting something like this :-/

D Peakman

November 16, 2013, 5:12 pm

From what I can work out the original model is better specified, that is apart from Bluetooth which to be honest to me is pointless. I'd never use a tv Soundbar for anything else but for TV and DVD.


November 27, 2013, 7:59 pm

Has anyone tried the KitSound Ovation Slim soundbar? It sounds similar to the SZII, but with better connectivity and greater range of controls...

Review please, TR!


December 8, 2013, 9:48 pm

does anyone know if this sound bar provides any virtual surround sound?


September 8, 2014, 8:35 pm

Do you have any clue as to what "surround" means? Look it up in a dictionary and see if you can answer your question.....

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