The Arcam Radia A15+ is a stereo integrated amplifier with Class AB amplification. It delivers 2 × 80 W into 8 Ω and 2 × 120 W into 4 Ω. Total harmonic distortion is 0.002% at 80% power into 8 Ω at 1 kHz.
It has an ESS ES9018K2M DAC for digital playback. Digital inputs include HDMI eARC/ARC for TV audio, which carries PCM stereo up to 24-bit/192 kHz. HDMI auto-switch is supported and enabled by default, and the TV remote can control volume. Bluetooth 5.4 works in both directions, so the amp can receive audio or send it to headphones. It supports Snapdragon Sound, aptX Lossless, LE Audio and Auracast.
The amp also has a built-in moving-magnet phono stage for turntables and a front-panel headphone jack. Stereo pre-outs connect a powered subwoofer or an external power amp. The front, top, sides and rear are aluminum, and the dials are solid aluminum. The rear USB-C port is for firmware updates only and is not an audio input.
- Amplifier type
- Class AB integrated stereo amplifier
- Power output
- 2 × 80 W (8 Ω, 20 Hz–20 kHz, 0.5% THD); 2 × 120 W (4 Ω, 1 kHz)
- Distortion (THD)
- 0.002% (80% power, 8 Ω, 1 kHz)
- DAC
- ESS ES9018K2M
- Digital inputs
- 2 × optical (TOSLINK), 2 × coaxial (RCA), 1 × HDMI eARC/ARC
- Digital formats
- 44.1, 48, 88.2, 96, 176.4, 192 kHz; 16-bit and 24-bit; HDMI PCM stereo up to 192 kHz
- Digital S/N ratio
- 109 dB (A-weighted, ref. 50 W, 0 dBFS)
- Analog inputs
- 3 × RCA line-level (S/N 106 dB A-weighted, ref. 50 W, 1 V input; 20 Hz–20 kHz ±0.2 dB)
- Phono input
- MM; 47 kΩ + 100 pF; 20 Hz–20 kHz ±1 dB (RIAA); S/N 80 dB (A-weighted, ref. 5 mV)
- Headphone output
- 3.5 mm jack; max 2.5 Vrms (32 Ω) / 5 Vrms (300 Ω); load range 16 Ω–2 kΩ
- Bluetooth
- Bluetooth 5.4; A2DP Sink/Source, AVRCP, BLE; SBC, AAC, aptX, aptX HD, aptX Lossless; LE Audio, Auracast, Snapdragon Sound; 2.400–2.4835 GHz, <20 dBm
- Outputs
- Speaker binding posts (4–16 Ω); stereo pre-amp outputs (RCA)
- Control and service
- Radia Control Input for system linking; USB-C service port for firmware updates (not an audio input)
- Power supply
- 100 V, 110–120 V or 220–240 V AC, 50–60 Hz
- Power consumption
- Max 500 W; standby <0.5 W; network standby <2 W
- Dimensions
- 431 × 344 × 98 mm (W × D × H, including terminals and feet)
- Weight
- 10 kg net; 13 kg boxed
- Construction
- Aluminum front, top, sides and rear; solid aluminum dials
- In the box
- Mains lead(s), remote control (2 × AAA), Quick Start Guide, Safety Instructions; plastic-free packaging