Trusted Reviews is supported by its audience. If you purchase through links on our site, we may earn a commission. Learn more.

Roth Audio OLi Review


rating-star rating-star rating-star rating-star rating-star


  • Assured sound for the money
  • Impressive build quality
  • Great value


  • Conservative look, bulky speakers
  • Minor straining on some effects when played loud

Key Specifications

  • Review Price: £344.80
  • 5.25in woven fibreglass woofers & 1in black diamond silk tweeters
  • 150W powered subwoofer, forward-firing
  • Black or Bird’s Eye Maple finish
  • Volume and crossover controls on sub
  • LFE and Line inputs on sub

If you’re searching for a high-quality yet affordable multichannel speaker system, Roth Audio is always a good place to start. Its range of home cinema floorstanders, bookshelf speakers, centres and subwoofers all aim to deliver maximum bang for your buck.

Roth OLi
Take this system for example, which is made up of speakers from Roth’s OLi series. Shop around online you can find the whole lot for just under £350, which already sounds like terrific value for money – particularly when you get them out of the boxes and inspect their beefy build quality.

The reason we’re taking a look at this system is to assess Roth’s brand new OLi C20 centre speaker and KH20 subwoofer, which cost around £75 and £130 respectively. These are joined by two pairs of OLi 10 bookshelf speakers for the front and rear channels, an which were launched last year and cost around £70 a pair.

The OLi C20 centre is an absolute monster, measuring 533mm wide by 203mm deep. That might not make it particularly convenient when it comes to installation, but that sort of cabinet volume can only be a good thing in terms of dialogue performance.

Roth OLi
What also counts in its favour is the elegant, understated design, which blends a classy black wood-effect finish on top with gloss black side panels. It’s reassuringly heavy and impressively built, making it tremendous value before we’ve even had a listen. On the back is a pair of gold-plated binding posts, further evidence of its impressive build quality.

Roth OLi
The Oli 10s meanwhile are similarly robust and quietly stylish. Each one stands 200mm tall and boasts the same black wood veneer and gloss black trim as the C20. The sides are slightly curved, while the front grille can be pulled from its plug fixings (which is quite tricky) to reveal eye-catching silver surrounds and a phase plug poking out of the woofer. Some might find them a little plain and bulky, others will love this understated ‘classic’ look.  Build quality on these is fantastic for such modestly-priced speakers, as it is across the system.
Roth OLiRoth OLi
Ironically, the speaker you’re most likely to hide away is the best-looking of the lot. The KH20 powered subwoofer is styled from head to toe in a lustrous gloss black finish, with elegant curves on each corner and a generally solid feel about the cabinet. It’s a front-firing design, with a cloth grille covering up the 8in woofer.
Roth OLi

The Roth OLiC20 centre speaker is the workhorse of the system, delivering all-important dialogue that drives the plot forward, and as such it’s equipped with the tools to make sure it’s heard. It’s a two-way design, employing two 5.25in woven fibreglass woofers and a 1in black diamond silk tweeter in between them. It can take up to 125W of power and achieves a claimed frequency response of 55Hz – 20kHz.

Roth OLi
As for the OLi10s, these are also two-way speakers with a single 4in woven fibreglass hybrid woofer and the same 1in silk dome tweeter as found in the centre speaker. The use of similar drivers across the range means the entire system is tonally matched, which is crucial if you want to really lose yourself in a movie soundtrack – if the sound varies from speaker to speaker, it can ruin the illusion. The OLi10s handle up to 100W and reproduce frequencies from 60Hz up to 20kHz.

Roth OLiRoth OLi

Finally, the KH20 is an active, forward-firing sealed subwoofer, packing an 8in PolyCel woofer and a 150W amplifier. The rear panel features volume and crossover dials, the latter adjustable from 80 up to 160Hz. There are two phono inputs, one labelled ‘LFE’ to receive signals from an AV receiver, while the Line input caters for other equipment without surround processing but with a subwoofer output (such as a TV).

Roth OLi

It sounds superb on paper, but in practice Roth’s performance is greater than the sum of its parts. It offers fabulous sound quality for such a wallet-friendly price, achieving the difficult balance of sounding dynamic and powerful while retaining an element of refinement and poise.

This much is evident from our favourite test scene, the Hellboy versus Elemental scrap in Hellboy II: The Golden Army, presented in DTS HD Master Audio. As the massive plant stomps through the city streets, it smashes up cars, rips up the road and bashes up buildings, sending effects flying from every speaker. The Roth gobbles up the cacophony with relish, conveying the shattering glass and falling rubble with force but doing so with a smooth, easy tone in the high frequencies and midrange.

The size of the speakers enables a bigger, more full-blooded sound than you might get from compact speakers, filling the room without having to push the volume up to ungodly levels.
Roth OLi

It helps of course that the Roth KH20 is such an assured subwoofer, reproducing low frequencies with the sort of punch and tautness that you simply don’t get from passive one-box system subs (as our reviews of the Panasonic SC-BTT590 and Samsung HT-E6500W showed). The Elemental’s footsteps sound huge, but the KH20 doesn’t only spring to life when there’s a big bang – it lends a subtle presence to everything from deep-voiced dialogue to background atmosphere.

And the centre channel does a magnificent job too, articulating speech with enough volume to cut through loud scenes, as well as injecting little subtleties and inflections that add to the realism, whether human or otherwise.

Roth OLi

We’re also greatly impressed by the way the OLi speakers interact, blending harmoniously as effects dart around the soundstage or sweep across the back. The sound is fast, cohesive and immersive, with enough grunt to get the pulse racing (and the neighbours complaining).

Admittedly we’ve heard speaker systems that take it to the next level, teasing out even more background detail and staging epic action scenes with more authority – Tannoy’s Mercury V springs to mind – and when pushed hard it just starts to strain slightly. But remember that the Roth’s sub-£350 price tag makes its assured sound quality all the more remarkable.

Roth OLi

It also delivers an enjoyable stereo music performance. Jazz masterpiece Kind of Blue by Miles Davis simply oozes into your ears, with those competent drivers shaping solos with a smoothness that eludes cheaper speakers. There’s a lovely depth to the tunes and a clean, perky top end.Roth OLi

With its engaging sound quality and superb build quality, Roth’s OLi system offers outstanding value for money. The new C20 centre and KH20 sub are excellent additions to the range, punching above their weight with power and surprising subtlety. They team up with the brilliant OLi10s to create a thrilling and cohesive sound that’s much better than the sub-£350 price tag would suggest.

Sure, you can get even more sonic sparkle elsewhere and the look won’t exactly set your living room alight, but if you’re after well-built, great-sounding speakers on a tight budget then this system is an OLi good show.

Trusted Score

rating-star rating-star rating-star rating-star rating-star

Score in detail

  • Performance 8
  • Features 8
  • Value 9
  • Sound Quality 8
  • Design 7


Number of Speakers 5
Supported Channels 5.1


Power (Watt) 150 (subwoofer)W

Physical Specifications

Height (Millimeter) 200 (OLi10)mm
Width (Millimeter) 153 (OLi10)mm
Depth (Millimeter) 178 (OLi10)mm
Weight (Gram) 7000 (OLi10)g

Why trust our journalism?

Founded in 2003, Trusted Reviews exists to give our readers thorough, unbiased and independent advice on what to buy.

Today, we have millions of users a month from around the world, and assess more than 1,000 products a year.

author icon

Editorial independence

Editorial independence means being able to give an unbiased verdict about a product or company, with the avoidance of conflicts of interest. To ensure this is possible, every member of the editorial staff follows a clear code of conduct.

author icon

Professional conduct

We also expect our journalists to follow clear ethical standards in their work. Our staff members must strive for honesty and accuracy in everything they do. We follow the IPSO Editors’ code of practice to underpin these standards.