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Cambridge CXA81 Mk II
SKU: APA2025-01681
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36 Instalments
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2 Years Warranty
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Free Shipping
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36 Instalments
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2 Years Warranty
1.199 €
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The result is upgraded power amplifier sections for NAIT XS 3, delivering greater pace and intimacy to their musical delivery – whether it's driving a pair of loudspeakers or your favourite pair of headphones.
The NAIT XS 3 has received significant performance upgrades, including a built-in phono stage, making it a perfect partner for turntables, as well as for streamers, CD players, or any other music source people want to enjoy with the signature Naim sound.
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The NAIT XS 3 can be upgraded with our external power supplies, power amplifiers and even cabling upgrades to get the best from all sources.
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With our typical obsessive attention to detail – all in service of achieving the most authentic musical performance – the NAIT XS 3 benefits from the following features:
Class A headphone amplification
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Technology & Craft
The upgrades in more detail:
Our R&D team has found a way to more than double the speed of the voltage gain stage, which in turn doubles the rate at which the speaker output stage can react.
The second gain stage transistors have been optimised, so they no longer need to be shielded by a cascode stage transistor. Removing the cascode means less amplifier stabilisation is required: that doubles the slew rate and delivers another uplift in sound quality.
The phono circuit topology comprises 3 stages: the gain stage, passive equalisation and final gain and active equalisation. This enables excellent noise performance, extended RIAA equalisation beyond the audio band and great overload headroom.
All RIAA equalisation capacitors are ‘through-hole’ mounted film designs, with low microphonic pickup and excellent transient performance. As phono stages are 1000x more sensitive than other inputs, this greatly benefits the sound quality.
Input impedance is 47kΩ in parallel with 470F capacitive loading; the gain is perfect for 5mV moving magnet cartridges
Audio InputsMM Phono Input via RCA, 47k parallel 470pF input impedance, suitable for 5mV cartridges
Line Level Inputs 130mV sensitivity, 47k input impedance, suitable for 2V
Power Amp In DIN Socket
Audio OutputsPowered Accessory Sockets +24V for Naim phono amplifier
Speaker Outputs 70W per channel into 8 ohms (4mm sockets), 100W per channel into 4 ohms
Line Outputs Variable (level) Pre-amp (DIN), Sub (RCA pair) 775mV,
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At Musical Fidelity we think of the M6si as being a destination product. The M6si offers such excellent performance, facilities and power that unless you are seeking the most exotic high-end sound quality you would never need another amplifier. We believe it’s that good.Internally, the M6si is configured as 2 independent monobloc power amps with a separate pre amp. It is, in fact, a pre amp with 2 monobloc power amps that just happen to share the same casework. The M6si has 220wpc. It has very low distortion, outstanding noise ratio and extremely flat frequency response. Its inputs are phono (MM/MC), 4 line level, 1 balanced XLR and 1 USB ‘B’ up to 24bit 96kHz asynchronous.The M6 combination of high power, high current and extraordinary stability means that it can drive any loudspeaker with ease.In use it is hard to hear any practical difference between the M6si and other much more expensive amplifiers. In proper blind listening comparisons, the M6si performs incredibly well. If we sound rather enthusiastic it’s because we are. Features:220WPCExcellent technical performanceAmazing load driving ability, unconditional stability will drive any loudspeakerWide range of useful inputs including asynchronous USB and switchable MM / MC PhonoPreamp outputInternally it is a separate preamp with two independent monobloc power amps; effectively a separates system in a boxExcellent, hunky build qualitySpecifications:Power output: 220 Watts per channel into 8 OhmsTHD (+ noise): 107dB ‘A’ - weightedFrequency Response: +0, –0.1dB, 10Hz to 20 kHz4x Line Level RCA1x Line Level XLR Balanced1x USB type ‘B’ connector - asynchronous data stream at up to 24-bit/96kHz1 x switchable phono inputSensitivity: 3mV nominal (MM), 0.4mV nominal (MC)Signal / noise ratio: >84dB ‘A’-weightedInput impedance: 47k Ohms (MM and MC)Frequency response: RIAA/IEC ±0.5dB 20Hz-20kHzDimensions - WxHxD (mm): 440 x 125 x 400Weight (unpacked / packed): 16.6 kg/ 21.3 kg
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CXA81 Mk II is the reference integrated amplifier of the CX range: 80 watts per channel in Class AB, a built-in ESS DAC and full connectivity — behind a clean, minimal aluminium fascia.
Key features
- 80 W per channel (8 Ω) — drives demanding speakers
- ESS ES9018K2M SABRE32 DAC, up to 32-bit / 384 kHz and DSD256
- Class AB amplification
- Toroidal transformer
- TOSLINK, coaxial and USB audio digital inputs
- Balanced XLR inputs
- Bluetooth aptX HD input
- Roon Tested via USB
A classic, rewritten
Improving on the CXA81 was no easy task: the original had established itself as a benchmark in its class, with a long list of awards from the specialist press. Cambridge Audio redesigned it from the ground up, with higher-grade components arranged in a new architecture that limits interference between stages.
What the listener gains
The result is greater depth, more transparency and finer resolution of detail. Instruments that went unnoticed, small shifts in the inflection of a voice and harmonies that were lost in the background now come through clearly, without the sound turning aggressive or tiring over long listening sessions.
A minimal fascia
CXA81 Mk II puts sound ahead of clutter. Its clean aluminium fascia carries only what you need: power, input selectors, a headphone output and a beautifully smooth volume control. The restrained lines in aluminium and steel are built to last, both mechanically and aesthetically.
At the heart of the CX range
It matches the CXN100 network player and the CXC v2 CD transport in looks and in engineering, for a complete system with one consistent design. It is available in silver, and in a limited black edition alongside the other models in the range.
Dimensions and placement
At 430 x 115 x 341 mm and 8.7 kg, CXA81 Mk II fits easily on a shelf or hi-fi rack, and its weight conveys the serious engineering inside. It is an amplifier you set up once and forget, in the sense that it never reminds you of its limits.
Class AB power with character
At the heart of CXA81 Mk II is a Class AB power stage that combines the warmth of Class A with the efficiency of Class B. It delivers 80 watts per channel into 8 ohms and 120 watts per channel into 4 ohms, enough to drive bookshelf speakers and floorstanders with ease, even in large rooms.
An oversized toroidal transformer
The large toroidal transformer gives the power stage a stable supply even in the most demanding passages. The amplifier plays loud without strain and without distortion, keeping bass tight and the soundstage stable when the music gets difficult.
Dynamics and harmonic depth
Wide dynamics and a rich harmonic palette are what set this amplifier apart: quiet passages keep texture and detail, loud ones open up without hardening. A short signal path keeps colouration to a minimum, so every note reaches the speakers as intact as possible.
Two pairs of speakers
The two sets of binding posts accept heavy-gauge cable, spades and banana plugs and drive two pairs of speakers, together or independently. You can run a second pair in another room, or compare two pairs in the same listening session.
For headphones too
The front-panel headphone output gives quality headphones the drive they need for late-night listening, following the same design logic as the power stage: enough current, low noise and no attempt to make the sound impressive by artificial means.
Connect all your sources
The digital side is comprehensive: two optical inputs and one coaxial accept a CD player, DAB tuner or television, while the USB-B port lets you use the amplifier as an external DAC for a Windows or Mac computer. Every digital source runs through the ESS ES9018K2M converter, with support up to 384 kHz and DSD256.
Analogue connections
Four RCA inputs and one balanced XLR cover a turntable with an external phono stage, a network player or any other analogue source. The balanced connection makes particular sense with sources such as CXN100, where it reduces noise along the signal path.
Flexibility in the system
The pre-out allows connection to an external power amplifier, while the subwoofer output adds a sub when the room calls for it. Trigger in and out switch all compatible components on and off together, and the RS232 port covers installations with a control system.
Wireless with aptX HD
The built-in Bluetooth receiver supports aptX HD, so wireless playback from a phone, tablet or computer happens with as little compression as possible. It is the quick way for a guest to play music from their own phone without compromising the system.
A system that grows
Whatever your starting point, CXA81 Mk II is happy to evolve with it: today a TV and a computer, tomorrow a network player, a turntable or a power amplifier. That flexibility is the main reason the CX range has remained a reference choice for years.
Specifications
Specifications
- 80 watts x 2 channels into 8 ohms (120 watts x 2 channels into 4 ohms)
- 4-ohm capability allows use with a wide range of speakers
- THD: 0.02% (20-20,000 Hz at 80% of rated power)
- signal-to-noise ratio: >93dB (ref 1W into 8 ohms), >105dB (ref full power)
- frequency response: <5-60,000 Hz (±1dB)
- built-in high-performance ESS Sabre ES9018K2M DAC
- toroidal power transformer for low noise and high-current output
- Bluetooth wireless connectivity for streaming music from compatible smartphones, tablets, and computers
- aptX HD encoding provides high-quality music streaming from compatible devices
- works as a Roon player (requires subscription and Roon Core running on your network)
- Roon Core is media server software that runs on your computer, NAS drive, or other compatible hardware
- Class AB amplifier design
- remote included
Connections
- two Toslink optical digital inputs (up to 24-bit/96kHz resolution)
- coaxial digital input (up to 24-bit/192kHz resolution)
- USB Type-B input for connecting a computer (up to 24-bit/384kHz PCM and DSD up to 11.2MHz)
- four unbalanced stereo RCA inputs
- balanced XLR left and right input
- mono RCA subwoofer output
- stereo RCA preamp output
- front panel 3.5mm headphone output
- switchable A+B speaker outputs with binding-post connectors
- control bus input and output
- 12-volt trigger input and output for automatic synchronized on/off with compatible Cambridge Audio components
- IR input
- RS-232C data port
Dimensions:
- 115 x 430 x 341mm
- weight: 8.7 kg
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Cambridge CXA81 Mk II
