Arcam A25 Integrated Amplifier
Flagship Radia amplifier with 100 W per channel, Class G efficiency, USB-C, aptX Adaptive and luxury materials.
Product Overview
The Arcam A25 is the premium integrated amplifier in the Radia line. It delivers ~100 W per channel into 8 Ω (165 W into 4 Ω) using a 5th-generation Class G amplifier design. Featuring USB-C input for high-resolution and DSD sources, Bluetooth with aptX Adaptive, and a built-in MM phono stage, the A25 blends power, versatility, and refined musicality. Premium components and thoughtful design make this amplifier appealing for those who want high performance with modern features.
Key Features
- Class G amplification for high power and efficiency. :contentReference[oaicite:20]{index=20}
- 100 W per channel into 8 Ω; 165 W into 4 Ω. :contentReference[oaicite:21]{index=21}
- Ultra-low distortion: 0.002 % at 80 % power, 8 Ω, 1 kHz. :contentReference[oaicite:22]{index=22}
- Three RCA analogue inputs. :contentReference[oaicite:23]{index=23}
- Rich resolution digital inputs: USB-C (supports up to 384/352.8 kHz + DSD256), Coaxial & Optical up to 192 kHz. :contentReference[oaicite:24]{index=24}
- Built-in MM phono stage. :contentReference[oaicite:25]{index=25}
- Bluetooth with aptX Adaptive, wireless or wired headphone output. :contentReference[oaicite:26]{index=26}
- Low standby power (<0.5 W) and robust power supply handling heavy dynamic peaks. :contentReference[oaicite:27]{index=27}
Technical Specifications
| Amplifier Type | Class G integrated amplifier |
|---|---|
| Continuous Power Output (8 Ω, 2 ch, 20-20 kHz) | 100 W per channel :contentReference[oaicite:28]{index=28} |
| Continuous Power Output (4 Ω, 2 ch, 1 kHz) | 165 W per channel :contentReference[oaicite:29]{index=29} |
| Harmonic Distortion | 0.002 % at 80 % power, 8 Ω, 1 kHz :contentReference[oaicite:30]{index=30} |
| Analogue Inputs | 3 × RCA line-level |
| Signal-to-Noise Ratio (Analogue in) | 106 dB A-weighted (ref. 50W, 1V input) :contentReference[oaicite:31]{index=31} |
| Frequency Response (Analogue) | 20 Hz – 20 kHz ±0.2 dB :contentReference[oaicite:32]{index=32} |
| MM Phono Input | 47 kΩ + 100 pF, 20 – 20,000 Hz ±1 dB :contentReference[oaicite:33]{index=33} |
| Digital Inputs |
USB-C: 384 / 352.8 / 192 / 176.4 / 96 / 88.2 / 48 / 44.1 kHz Coaxial & Optical: 192 / 176.4 / 96 / 88.2 / 48 / 44.1 kHz DSD via USB-C: DSD256 / 128 / 64 Bit depths: 32 / 24 / 16 bits :contentReference[oaicite:34]{index=34} |
| Digital S/N Ratio (ref 50W, 0dBFS) | 110 dB :contentReference[oaicite:35]{index=35} |
| Headphone Output | 2.5 V RMS into 32 Ω; 5 V RMS into 300 Ω; supports 16 Ω – 2 kΩ loads :contentReference[oaicite:36]{index=36} |
| Mains Voltage | 100 / 110-120 / 220-240 V, 50-60 Hz (region dependent) :contentReference[oaicite:37]{index=37} |
| Power Consumption (Maximum) | 500 W :contentReference[oaicite:38]{index=38} |
| Standby Power Consumption | < 0.5 W :contentReference[oaicite:39]{index=39} |
| Dimensions (W × D × H) | 431 × 344 × 83 mm (inc speaker terminals & feet) :contentReference[oaicite:40]{index=40} |
| Weight (Net / Packed) | 9 kg net; 12 kg packed :contentReference[oaicite:41]{index=41} |
| Supplied Accessories | Mains lead(s), Remote + 2 × AAA batteries, Quick-Start guide, Safety Instructions :contentReference[oaicite:42]{index=42} |
