Arcam

Arcam A50 Signature Dual-Mono Class G Integrated Amplifier

  • Arcam A50 Signature integrated amplifier front view, black finish with ARCAM A50 display and input volume knobs
  • Arcam A50 Signature integrated amplifier angled view showing input and volume dials on glossy black fascia
  • Arcam A50 Signature amplifier rear panel with HDMI ARC, XLR balanced inputs, phono MC/MM, and speaker terminals
  • Arcam A50 Signature amplifier with included remote control, close up of input dial and top vents

A50 SIGNATURE

$4,399.00
$4,399.00

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(For store pickups, please call for availability.)

Product Overview

The Arcam A50 Signature is the flagship of Arcam’s Radia amplifier range and the brand’s first integrated amplifier with a fully dual-mono Class G design. It is built for listeners who keep their sources separate: a turntable, a CD player, a network streamer and a TV can all connect to one chassis, with amplification as the priority.

Dual-mono means each channel works as its own amplifier, with its own transformer winding, power regulation and output stage. Class G runs the output stage on a low-voltage rail for everyday listening and switches to higher rails only when musical peaks need it. The result is 150W per channel into 8 ohms and 220W into 4 ohms, with firm control over speakers that are difficult to drive.

The A50 Signature also works as the centre of a modern system. HDMI eARC brings TV sound through the amplifier with volume control from the TV remote, the USB-C input accepts high-resolution files from a computer, and the built-in phono stage handles both moving magnet and moving coil cartridges without a separate preamp. Bluetooth 5.4 with aptX Lossless covers phones and wireless headphones.

Features

  • Dual-mono Class G design with independent transformer winding, regulation and output stage per channel
  • 150W per channel into 8 ohms, 220W into 4 ohms, 0.002% harmonic distortion
  • Class A phono stage for MM and MC cartridges
  • ESS ES9039Q2M DAC with USB-C up to 384kHz/32-bit, HDMI eARC, optical and coaxial inputs
  • Balanced XLR input, three RCA inputs and a preamp output
  • Headphone output for 16 to 2,000 ohm headphones
  • Bluetooth 5.4 with aptX Lossless, LE Audio and Auracast
  • Plastic-free packaging

Specifications

Continuous power output (0.5% THD), per channel
2 channels driven, 20Hz - 20kHz, 8Ω 150W
2 channels driven, 1kHz, 4Ω 220W
Harmonic distortion, 80% power, 8Ω at 1kHz 0.002%

Analogue Inputs
Number of 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 Only 384, 352.8, 192, 176.4, 96, 88.2, 48, 44.1
Other digital inputs 192, 176.4, 96, 88.2, 48, 44.1

Bit depths (bit) 32, 24, 16
Frequency response (filter 1) 20Hz—20kHz ± 0.2dB
Signal/noise ratio (A-wtd, ref. 50W, 0dBFS) 109dB

Headphone Output
Maximum output level (RMS) into 32Ω/300Ω 2.5V/5V
Load range 16Ω - 2kΩ

Wireless Specifications
Bluetooth Version - 5.4; A2DP Sink/Source, AVRCP, BLE, SBC, AAC, aptX, aptX HD and aptX Lossless, LE Audio, Auracast
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
Power consumption (maximum) 700W*
Power consumption (standby) <0.5W
Dimensions W x D (including speaker terminals) x H (including feet) 431 x 344 x 99mm
Weight (net) 12kg*
Weight (packed) 14kg*

Supplied accessories
Mains lead(s)
Remote control with 2 x AAA batteries
Quick Start Guide
Important Safety Instructions

Frequently Asked Questions

What is the Arcam Radia A50 Signature?

The Arcam Radia A50 Signature is a high-performance integrated amplifier designed in Cambridge, UK to mark Arcam's 50th anniversary, combining dual-mono Class G amplification, an ESS reference DAC, Class A MM/MC phono stage, HDMI eARC, USB-C audio, and Bluetooth with Auracast in a single chassis. Available at Trutone Electronics in Mississauga, Ontario.

What makes the Arcam Radia A50 Signature's Class G amplification special?

The Arcam Radia A50 Signature is the first Arcam integrated amplifier with a fully dual-mono Class G architecture, where each channel is a self-contained module with its own power regulation, transformer windings, and output stage, eliminating crosstalk at the circuit level. Class G switches between voltage rails in response to signal level, delivering Class A-like purity at low levels and high-power headroom when needed.

How much power does the Arcam Radia A50 Signature deliver?

The Arcam Radia A50 Signature delivers 150 watts per channel into 8 ohms and 220 watts per channel into 4 ohms, with total harmonic distortion rated at 0.002% at 80% power into 8 ohms.

What digital inputs does the Arcam Radia A50 Signature have?

The Arcam Radia A50 Signature includes HDMI eARC/ARC, USB-C audio up to 384kHz/32-bit, two coaxial S/PDIF inputs, and one optical S/PDIF input, all processed through an ESS ES9039Q2M DAC with a 109dB signal-to-noise ratio.

Does the Arcam Radia A50 Signature support vinyl and turntables?

The Arcam Radia A50 Signature includes a built-in Class A phono stage supporting both MM and MC cartridges, with RIAA equalisation accurate to ±1dB from 20Hz to 20kHz.

Does the Arcam Radia A50 Signature stream music wirelessly?

The Arcam Radia A50 Signature supports Bluetooth 5.4 with aptX Lossless and Auracast but does not include built-in Wi-Fi streaming. Listeners who want network streaming with Spotify, TIDAL, or Qobuz can add the Arcam ST25 streamer.

What headphone options does the Arcam Radia A50 Signature offer?

The Arcam Radia A50 Signature includes a dedicated headphone output covering impedances from 16 to 2,000 ohms, delivering up to 5 volts into 300 ohms for demanding planar magnetic headphones, with Bluetooth aptX Lossless for wireless listening.

What analogue inputs does the Arcam Radia A50 Signature have?

The Arcam Radia A50 Signature provides three RCA analogue input pairs, one balanced XLR input, and a built-in MM/MC phono stage, accommodating a CD player, DAC, two line-level sources, and a turntable simultaneously.

Who is the Arcam Radia A50 Signature designed for?

The Arcam Radia A50 Signature is designed for listeners who prioritise amplification quality over built-in streaming, building a dedicated stereo system around a separate streamer, CD player, or turntable with significantly more power and channel separation than standard Radia models provide.

How does the A50 Signature compare with the Arcam A25+?

The A25+ shares its power supply between channels and has no balanced XLR input. The A50 Signature adds a dual-mono layout, 150W per channel, an XLR input and moving coil phono support, making it the choice for harder-to-drive speakers and turntables with MC cartridges.