Arcam A25+ with KEF LS50 META (2025 Model)
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Arcam A25+ with KEF LS50 META (2025 Model)
It was way back in the mid-1970s when Doug Brady showcased the first amplifier from A&R Cambridge (as the company was then known) — the A60, which featured in many of our magazine adverts. The Arcam A25 continued that legacy with great success, earning a reputation for performance and reliability. Naturally, expectations are high for its successor, the Arcam A25+, which is set to carry the torch forward.
Features
- Wireless audio with Bluetooth 5.4
- Featuring Snapdragon Sound for wireless lossless audio
- Featuring Auracast for connecting wireless headphones or speakers to play music in multiple spaces
- HDMI eARC and USB-C inputs
- Hi-res audio ESS ES9018 DAC
- Meticulously tuned phono stage
- Class G amplification
- 2x 100 Watts (8Ω) Power Output
- Compact remote control
- Solid aluminium dials
- A 6.5" high-resolution bonded display
- Aluminium front, top, sides and rear panels
- Plastic free packaging
The Best of the Radia+ Range
The ARCAM A25+ is the best sounding and most versatile of Arcam’s Radia+ integrated amplifiers. The A25+ is the latest in nearly 50 years of amplifier design and manufacture, dating back to their first product in 1976 — the A&R Cambridge A60 amplifier.
Continuous Innovation
Since the launch of the award-winning ARCAM Radia A25, it is clear they haven’t rested. Their engineering team pushed further to create the premium ARCAM A25+, an even better sounding and more versatile integrated amplifier.
Extensive Connectivity
With a wide array of analogue inputs, including a meticulously tuned phono stage, and digital inputs including HDMI eARC and USB-C, the A25+ provides impactful sound for everything from vinyl to TV and streaming.
Cutting-Edge Performance
The A25+ features an enhanced power supply design, a new DAC, and cutting-edge wireless capabilities straight out of the box. Snapdragon Sound delivers uncompressed digital audio via Bluetooth, while Auracast enables multiple compatible headphones or speakers to share music wirelessly, with no pairing required.
Superior Amplification Technology
Powered by our 5th generation Class G amplifier design, you can expect the best sound quality and dynamics from what has always been a better sounding and more efficient class of amplifier.
KEF LS50 META
The Kef LS50 Meta is the replacement for the iconic LS50 speaker which was released way back in 2012 as a limited anniversary model and was one of the most award-winning speaker products ever released by KEF, receiving accolades from such publications as Stereophile, What Hi-Fi, and The Absolute Sound. So the new LS50 Meta have a lot to live up to.
Pushing the Technological Boundaries
The new KEF LS50 Meta pushes the technological boundaries in its mission to create the best possible sound, Metamaterial Absorption Technology (MAT) is a highly complex maze-like structure that eliminates unwanted sound from the rear of driver, resulting in a purer, more natural performance. MAT is the physical manifestation of that drive. The result of a joint development project with the Acoustic Metamaterials Group, MAT breaks completely new ground in loudspeaker design….
LS50 Meta’s baffle is engineered from an injection-moulded Dough Moulding Compound, while inside the cabinet cross bracing and Constrained Layer Damping combine to deaden internal vibrations. The result of such meticulous attention to detail is the lowest coloration of any speaker in its class. Using Computational Fluid Dynamics, the port flare and profile of LS50 Meta’s patented off-set port is calculated to delay the onset of turbulence, and the flexible port walls prevent resonances from colouring the midrange. This leads to improved clarity, with exceptional depth and detail..
Redesigned and Improved
KEF's trademark Uni-Q driver has also been redesigned and improved, incorporating the new Meta technology. The Kef LS50 Meta certainly shares a likeness with the original. But while LS50 is a great speaker, LS50 Meta and the technological advances it boasts offer a truly dramatic improvement in sound quality…
The Kef S2 Floor Stands are optional but a must in our opinion, improving the performance and making them look simply stunning in any room.
A25+ Integrated Amplifier Specifications
| Continuous Power Output: | (0.5% THD) 2 channels driven |
| 8Ω, 20Hz – 20kHz: | 100W |
| 4Ω, 1kHz: | 165W |
| Harmonic Distortion: | 80% power, 8Ω at 1kHz: 0.002% |
| Analogue Inputs – Number Of Inputs: | 3 (RCA pairs) |
| Analogue Inputs – Signal/Noise Ratio: | (A-weighted, ref. 50W, 1V input): 106dB |
| Analogue Inputs – Frequency Response: | 20Hz—20kHz ± 0.2dB |
| Phono (MM) Input – Input Impedance: | 47kΩ + 100pF |
| Phono (MM) Input – Frequency Response: | (ref. RIAA curve): 20Hz—20kHz ± 1dB |
| Digital Inputs – Supported Sample Rates: | USB-C Only: 384, 352.8, 192, 176.4, 96, 88.2, 48, 44.1 kHz; All other digital inputs: 192, 176.4, 96, 88.2, 48, 44.1 kHz |
| Digital Inputs – Bit Depths: | 32, 24, 16 |
| Digital Inputs – Supported DSD Rates: | USB-C Only: 256, 128, 64 |
| Digital Inputs – Frequency Response: | (Filter 1): 20Hz—20kHz ± 0.2dB |
| Digital Inputs – Signal/Noise Ratio: | (A-weighted, ref. 50W, 0dBFS): 109dB |
| Headphone Output – Maximum Output Level: | (RMS) into 32Ω / 300Ω: 2.5V / 5V |
| Headphone Output – Load Range: | 16Ω – 2kΩ |
| Wireless Specifications – Bluetooth Version: | 5.4; A2DP Sink/Source, AVRCP, BLE, Snapdragon Sound, AAC, LE Audio, Auracast |
| Wireless Specifications – Bluetooth Transmitter Frequency And Power: | 2,400 MHz to 2,483.5 MHz: <20dBm |
| General – Mains Voltage: | 100V or 110–120V or 220–240V, 50–60Hz |
| General – Power Consumption (Maximum): | 500W |
| General – Power Consumption (Standby): | <0.5W |
| General – Dimensions (W x D x H): | Including speaker terminals and feet: 431 x 344 x 83mm |
| General – Weight (Net): | 9 kg |
| General – Weight (Packed): | 12 kg |
| Supplied Accessories: | Mains lead(s), Remote control with 2 x AAA batteries, Quick Start Guide, Important Safety Instructions |
LS50 META Specifications
| Drive units | Uni-Q Driver Array: HF: 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption Technology MF/LF: 130 mm (5.25 in.) aluminium cone |
| Crossover frequency | 2.1 kHz |
| Frequency range (-6dB) | 47 Hz - 45 kHz |
| Typical in-room bass response (-6dB) | 26 Hz |
| Frequency response (±3dB) | 79 Hz - 28 kHz |
| Harmonic distortion (90dB, 1m) | <0.4% 175 Hz - 20 kHz <0.1% 300 Hz - 10 kHz |
| Maximum output | 106 dB |
| Amplifier power (recommended) | 40-100 W |
| Nominal impedance | 8 Ω (min. 3.5 Ω) |
| Sensitivity | 85 dB |
| Dimension (H x W x D) per unit | 302 x 200 x 280.5 mm (11.9 x 7.9 x 11.0 in.) |
| Weight | 7.8 kg (17.2 lbs.) |
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