Cambridge Audio CXA 81 Mk II

At first look, the Cambridge Audio CXA81 Mk II and its smaller 60W brother, the CXA61, don’t seem very different from the original CX series from 2014. The stylish Lunar Grey case is the same, and one of the few obvious changes is that the tone and balance knobs are no longer on the front.

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But inside, this amplifier has had some important upgrades. While the basic analog circuits are mostly the same, Cambridge Audio’s engineers made key improvements, especially to the signal-processing chips (op-amps) and the capacitors in both the preamp and power amp sections. These changes have noticeably improved the sound quality.

Ready for High-Quality Digital Music

The CXA81 Mk II has a high-quality built-in DAC (ESS Sabre ES9016K2M) that can play high-resolution audio files, including ultra-detailed formats like 32-bit/384kHz PCM and DSD256 when connected via USB. This is great for audiophiles who want the best sound quality.

Another big upgrade is the built-in aptX HD Bluetooth, which lets you stream high-quality wireless audio (up to 24-bit/48kHz) from your phone or tablet. The older CXA80 needed an extra adapter for Bluetooth, but now it’s included, making wireless listening much easier.

Rear Panel & Connectivity

A quick look at the rear panel reveals a comprehensive array of connections:

• Four RCA analogue inputs
• One balanced XLR input
• Coaxial S/PDIF input (up to 24-bit/192kHz)
• Two optical Toslink inputs (up to 96kHz)
• USB Audio input
• Preamp output
• Subwoofer output
• Speaker A/B terminals for bi-wiring or dual-zone setups

Notably absent is a built-in phono stage, but vinyl lovers can easily add an external phono preamp. Cambridge Audio’s own Alva series would be a perfect match.

There’s also a 3.5 mm headphone output on the front for convenient personal listening.

Sound Performance: Clarity and Command

From the very first notes, this amplifier grabs your attention with its energetic, dynamic, and incredibly detailed sound.

What makes the CXA81 special is its confidence; it handles fast, punchy rhythms with precision, shifts smoothly between loud and soft passages, and keeps the music exciting from start to finish. The midrange is rich and expressive, letting melodies shine while keeping everything balanced.

The bass is powerful yet controlled, handling deep grooves with ease, while the highs stay crisp without ever becoming harsh.

Some might say the CXA81 has a straightforward sound, but it also works beautifully with softer, more intimate music like a solo piano or a small string ensemble, where it reveals a more delicate and refined side.

What sets it apart is its stunning clarity. Compared to rivals like the Rega Elex-R, the Cambridge sounds cleaner and more precise, making the competition seem a little muddy in comparison. Matching its rhythm and dynamics is tough enough, but finding an amp with a smoother, more nuanced sound would be something truly special.

Balanced Sound for All Music

If we had to find a small flaw, the CXA81 doesn’t add extra “warmth” or color to the sound like some amplifiers do; it stays clean and accurate. But this makes it work brilliantly with all kinds of music, from big orchestral pieces to simple acoustic tracks.

Play a solo piano song or a small jazz group, and the CXA81 shines differently, highlighting every delicate note and emotional detail. It’s like the amplifier adjusts perfectly to whatever you throw at it.

Verdict: A Truly Capable Integrated Amplifier

The Cambridge Audio CXA81 Mk II sets a high benchmark for what a modern integrated amplifier should offer. With superb sound quality, a wide range of digital and analogue connections, and high-resolution audio support, this amp checks all the right boxes.

More importantly, it delivers music with such confidence and clarity that you’ll likely find yourself listening more and analyzing less. It’s a system-enhancing piece of kit that invites long listening sessions and emotional musical engagement.

In a fast-changing hi-fi world, great sound is timeless. And with the CXA81 Mk II, Cambridge Audio proves once again that you don’t need to spend a fortune to experience it.

Price & Availability

The Cambridge Audio CXA81 Mk II will be available from May 2024 in the Cambridge Audio web shop and authorized dealers for $1,199 / £999 / €1,199.

Specifications Cambridge Audio CXA 81 Mk II

Power Output: 80W RMS into 8 Ohms, 120W RMS into 4 Ohms

DAC: ESS Sabre ES9018K2M

Frequency Response: <5Hz– 60kHz +/-1dB

Analogue Audio inputs: 1x balanced XLR, 4 x RCA

Compatibility: TOSLINK optical: 16/24bit 32-96kHz PCM only, S/PDIF coaxial: 16/24bit 32-192kHz PCM only, USB: audio profile 1.0/2.0 (default 2.0), up to 24-bit 384kHz PCM, up to DSD256 or DoP256,
Bluetooth: 4.2 A2DP/AVRCP supporting up to aptX HD (24bit 48kHz)

Bluetooth APTX HD Receiver Built-in: Yes

ROON Tested: Yes

Remote Control: Yes

Max Power Consumption: 750W

Standby Power Consumption: <0.5W

Dimensions: (H X W X D) 115 x 430 x 341mm (4.5 x 16.9 x 13.4”)

Weight: 8.7kg (19.1lbs)

Lastly, Inside The Box: CXA81 Integrated Amplifier, Power Cable, 3 x AAA Batteries, Remote Control, Control Bus Cable, Bluetooth antenna, Quick Start Guide, Safety Guide

Find A Retailer For Cambridge Audio CXA 81 Mk II

Check out some of the authorized dealers near you.