Cambridge CXA81 Review - Trusted Reviews

Verdict

Cambridge’s CXA81 integrated amplifier improves upon the enjoyable if flawed CXA80 with new features, putting in an authoritative performance. It’s currently the best integrated amplifier you can buy for around £1000.

Pros

• Extensive spec
• Understated looks
• Thoroughly enjoyable and convincing sound

Cons

• Ordinary remote
• No phono stage

Key Features

• Bluetooth supportaptX HD Bluetooth
• DACPlayback up to 32-bit/384kHz
• Power80W per channel

Introduction

The Cambridge CXA81 was the top-of-the-line integrated amplifier in its CX2 range of hi-fi separates, replacing the CXA80 and throws several new features into the mix.

They must be working around the clock at Cambridge Audio at the moment, the company having launched a plethora of new products recently. Another product to hit the online and brick and mortar stores is the CXA81 MkII, which goes on sale May 2024, replacing the CXA81 reviewed before you.

The CXA81 still resides as a top-of-the-line integrated amplifier, so if you’re interested in getting one, there’s no time better than right now.

Design

• Features ‘floating’ design
• Minimalist aesthetic

There isn’t much happening on the outside of the CXA81 to suggest the Cambridge engineering team has ripped up its blueprints and started again. The understated yet handsome fascia has been tidied up, thanks to the removal of balance and tone controls, and is now coloured a sort of noncommittal grey as it (seemingly) floats above its recessed plinth.

Other than a volume control, input selection controls, a power on/off button and a 3.5mm headphone output, there isn’t much here at all. If “minimal” is a design language you admire, you’ll love the look of the CXA81.

Features

• Features integrated Bluetooth connectivity
• Can handle files up to 32-bit/384kHz and DSD256

If design-wise it’s more-or-less business as usual, Cambridge has been hard at work under the bonnet. Much of what passes as the “nuts and bolts” of such a product has been subjected to a hard stare, and as a consequence there have been numerous changes.

The most obvious, and most headline-grabbing, is the introduction of ESS Sabre’s ES9016K2M digital-to-analogue convertor. This is a deep-breathing DAC, capable of dealing with 32-bit/384kHz and DSD256 digital files (at least via the USB socket on the rear panel. The pair of digital optical inputs top out at 24-bit/96kHz and the coaxial input is limited to 24-bit/192kHz).

In addition, where the outgoing CXA80 relied upon a wireless dongle, the CXA81 includes integrated aptX HD Bluetooth reception (to a 24-bit/48kHz standard). Plenty of the crucial-but-unglamorous components such as capacitors and op-amps have been upgraded in the name of improved audio performance.

As well as those digital inputs, the CXA81 has four unbalanced RCA analogue inputs and a balanced XLR pair, too. Also included is a suite of the sort of ins and outs so beloved of the custom install industry.

So, in terms of connectivity, all that’s missing is a phono stage for a turntable. Cambridge will undoubtedly (and reasonably) point out a) its splendid (but now discontinued) Alva TT record player has an integrated phono stage; and b) it has an extremely well-regarded range of off-board phono stages in its product line-up.

Control is via Cambridge’s system remote, which naturally features an excess of buttons beyond that’s required to change the CXA81’s input or alter its volume. It’s a bog-standard handset that doesn’t really feel classy enough to be accompanying a grand’s-worth of amplifier.

Sound Quality

• Reveals plenty of detail
• Finely judge tonal balance
• Versatile performance

There’s no point in being coy when it comes to the CXA81’s sound. This is a brilliantly accomplished amplifier, one that pays close attention to every single aspect of music reproduction and serves it up in an entirely convincing and enjoyable manner. And this is true no matter the source of your music, nor its genre.

Detail levels are as good a place as any to start, and the Cambridge reveals an absolute torrent of detail. Juana Molina’s Eras is simply packed with information, and it’s divulged with absolute clarity and assurance.

Whether it’s the barely there squeak of a fingertip on a guitar string, or the palate noise as the singer prepares to deliver the next line, the CXA81 lays it out for you. Not in a showy way, mind – everything the Cambridge reveals is in proper context, with no undue emphasis being drawn to any element of the recording.

This kind of finely judged balance holds true for tonality throughout the frequency range, too. An all-court test such as Spiritualized’s Come Together illustrates the point perfectly. There is formidable power and punch to the low frequencies (although it’s fearsomely controlled), wide-open spaciousness to accompany the heady detail levels in the mid-range, and assertive levels of attack at the higher end.

Integration throughout the frequency range is seamless, so the impression of performance unity (even in a mix as cloudy and dense as this Spiritualized tune enjoys) is absolute.

The CXA81 can turn its hand to pretty much anything. Switch down a notch or two with a listen to Billie Holiday’s You’re My Thrill and the Cambridge handles the lugubrious tempo, as well as the peerless vocal, well. Step it up again with Amon Tobin’s Get Your Snack On and there’s all the energy, all the dynamism and all the propulsion the song demands.

At no point does the CXA81 sound anything other than completely in charge of the music it’s playing. It’s enthusiastic and dynamic when the music is excitable; it’s composed and considered when the music is spare.

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Should you buy it?

It’s one of the best amps at its price class

There’s plenty of competition from the likes of Rega and Arcam, and the Cambridge pips them for performance

Buy Now

It’s about to be replaced

The CXA81 will be replaced by the CXA81 MkII in May 2024, so you may want to hold off on a purchase

Final Thoughts

You’re not short of options with efforts from other brands such as Rega and the Arcam both engaging and persuasive amps. But hear them against the CXA81 and, although the differences are hardly night and day, there’s really only one amp on which you’d be happy to spend your money.

Rega’s Elex-R, for example, has plenty to entice. It’s a confident, nimble listen with a good eye for detail – and it has a very capable phono stage on board too. However, it lacks for both power and digital compatibility next to the Cambridge – there’s no DAC, no Bluetooth and, ultimately, it can’t quite compete with the CXA81 when it comes to across-the-board fidelity.

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We test every amplifier we review thoroughly over an extended period of time. We use industry standard tests to compare features properly. We’ll always tell you what we find. We never, ever, accept money to review a product.

Find out more about how we test in our ethics policy.

Tested over several days

Tested with real world use

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FAQs

Does the Cambridge Audio CXA81 support Bluetooth?

Yes, Bluetooth is integrated with this amplifier, so you can stream from your phone over a Bluetooth aptX HD connection

Full specs

‹ UK RRP USA RRP Manufacturer Size (Dimensions) Weight ASIN DAC Release Date Model Number Amplifier Type Connectivity Frequency Range Amplification Stated Power Remote Control Inputs Outputs Cambridge Audio CXA81 £999 $1299 Cambridge Audio 430 x 341 x 115 MM 8.7 KG B07XRV4T1P ESS Sabre ES9016K2M 2019 CXA81 Integrated Bluetooth 4.2, Roon Ready 5 60000 – Hz Class AB 750 W Yes S/PDIF coaxial, Two TOSLINK optical, USB audio, balanced XLR, Four RCA Speakers A+B, 3.5mm headphone, Preamp Output, Subwoofer Output ›