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Arcam created the Radia series to be a gateway into the audiophile realm with little outlay. The A25 amplifier is at the top end of the range. Below it sits the A5 50-watt amplifier and the A15 80-watt amplifier.
That is a curious distinction. Arcam didn’t say that these are budget components. They are a doorway for the young music lover who wants something just a little bit better, than what the local big-box store has to offer.
The A25 produces 100 watts into 8 ohms and 165 into 4. It was built upon Arcam’s 5th Generation Class-G Amplifier design. Making it as powerful as it is efficient.
It features Bluetooth AptX™, has a Moving Magnet Phono input, and Hi-Res Digital inputs including 1 Coaxial, 1 Optical, and 1 USB C. The USB supports the highest bitrates among the digital inputs. And I’ll paste a link below if you want to geek out on the supported bitrates.
The ST5 is touted as a High-Resolution upgrade to the amplifier lineup. Arcam supplies a control link, which allows the 2 components to talk to each other and act as one.
The ST5 will playback music directly from Spotify Connect and Tidal Connect, its Roon Ready, with Hi-Res audio and MQA support. All digital audio is output on the analog outputs using an ESS ES9018 high-resolution DAC with time domain jitter elimination.
It works with the Arcam app so you can access your favorite Radio stations, It supports Airplay 2, and Chromecast and works with both Apple and Android devices. It supports Hi-Res Audio up to 24 Bit / 192 kHz from analog and digital outputs.
Supported files are: FLAC, WAS (LPCM), MQA, AAC, ALAC, AIFF, DSD (128)
Around the back, you’ll find 1 coaxial, 1 optical, and 1 set of analog RCA outputs.
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Continuous power output (0.5% THD), per channel:
2 channels driven, 20Hz – 20kHz, 8Ω 100W
2 channels driven, 1kHz, 4Ω 165W
Harmonic distortion, 80% power, 8Ω at 1kHz 0.002%
Analog Inputs:
3 (RCA pairs)
Signal/noise ratio (A-wtd, ref. 50W, 1V input) 106dB
Frequency response 20Hz—20kHz ± 0.2dB
Phono (MM) Input:
Input impedance 47kΩ + 100pF
Frequency response (ref. RIAA curve) 20Hz—20kHz ± 1dB
Digital Inputs:
Supported Sample Rates (kHz)
USB-C 384, 352.8, 192, 176.4, 96, 88.2, 48, 44.1
Coaxial (RCA) 192, 176.4, 96, 88.2, 48, 44.1
Optical (Toslink) 192, 176.4, 96, 88.2, 48, 44.1
Supported DSD USB-C only 1024, 512, 256, 128, 64
Bit depths (bit) 32, 24, 16
Frequency response (filter 1) 20Hz—20kHz ± 0.2dB Signal/noise ratio (A-wtd, ref. 50W, 0dBFS) 110dB
Headphone Output:
Maximum output level (RMS) into 32Ω/300Ω 2.5V/5V
Load range 16Ω – 2kΩ
General:
Mains voltage 100V or 110–120V or 220–240V, 50–60Hz
Power consumption (maximum) 500W
Power consumption (standby) <0.5W
Dimensions W x D (including speaker terminals) x H (including feet) 431 x 344 x 83mm
Weight (net) 9kg
Weight (packed) 12kg
Supplied accessories:
Mains lead(s)
Remote control with 2 x AAA batteries
Quick Start Guide
Important Safety Instructions
MSRP:
$1499 USD / $2399 CAN
Supported Hi-res media:
FLAC, WAS (LPCM), MQA, AAC, ALAC, AIFF, DSD (128)
Supported Hi-res Bit depth:
16, 24
Supported samples rates (kHz):
44.1, 48, 88.2, 96, 176.4, 192
Supported media:
MP3, MP4, OGG, WMA
Supported Bit depth:
16
Supported samples rates (kHz):
44.1, 48
Gapless Playback:
Yes
Digital Outputs:
1x Coaxial (RCA), 1x Optical (Toslink)
Analog Outputs:
1x Stereo (RCA) pair
Frequency response (filter 1):
20Hz—20kHz ± 0.05dB
Mains voltage:
100V or 110–120V or 220–240V, 50–60Hz
Power consumption:
12W
Power consumption (Eco standby):
<0.5W
Dimensions W x D (including speaker terminals) x H (including feet):
431 x 344 x 57mm
Weight (net):
3.5 kg
Weight (packed):
5.6 kg
Supplied accessories:
Mains lead(s)
Remote control with 2 x AAA batteries
Control Cable
Quick Start Guide
Important Safety Instructions
MSRP:
$799 USD / $1199 CAN
Website:
Company:
SECRETS Tags:
arcam, radia, integrated amplifier, streamer, hi-res, cambridge, audiophile, stereo
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