The ARCAM A50 Signature integrated amplifier celebrates 50 years of British hi-fi engineering with an advanced dual-mono Class G design delivering 150 watts per channel into 8 ohms. Its independent amplification channels provide exceptional power, precise stereo imaging, and low-noise performance for premium home audio systems. An ESS ES9039Q2M DAC, HDMI eARC, high-resolution USB-C input, and built-in Class A MM/MC phono stage accommodate digital music, television audio, and vinyl playback. With Bluetooth 5.4, aptX Lossless, Auracast, balanced XLR connectivity, and wired or wireless headphone support, the A50 Signature combines audiophile-focused engineering with modern listening flexibility.
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ARCAM A50 Signature Dual-Mono Class G Integrated Amplifier

Celebrating 50 years of British hi-fi engineering, the ARCAM A50 Signature is a premium integrated amplifier that brings together exceptional power, refined musical performance, and modern connectivity. Developed in collaboration with ARCAM co-founder John Dawson, this anniversary model represents a significant advancement in the company's amplifier design. As ARCAM's first dual-mono Class G integrated amplifier, the A50 Signature delivers 150 watts per channel into 8 ohms and 220 watts per channel into 4 ohms, providing the dynamic power and control needed to bring demanding music passages to life.

At the heart of the A50 Signature is ARCAM's most advanced Class G amplifier architecture to date. Rather than sharing major power supply and amplification components between channels, each channel operates through an independent amplifier module with dedicated transformer windings, power regulation, reservoir capacitors, Class G lifter circuitry, and an output-stage heatsink. This dual-mono construction is designed to minimize unwanted interaction between left and right channels, improve channel separation, and preserve musical detail. The result is an amplifier engineered for precise stereo imaging, low noise, and effortless dynamics across a wide range of loudspeakers.

The A50 Signature is equally sophisticated when handling digital audio. Its premium ESS ES9039Q2M digital-to-analog converter provides high-resolution playback through USB-C, coaxial, and optical digital connections. The USB-C audio input supports PCM audio up to 32-bit/384kHz, making it an excellent choice for connecting a computer or compatible digital music source. HDMI eARC/ARC brings the same high-quality two-channel amplification to television audio, allowing listeners to enjoy movies, shows, and concerts through their stereo speakers. Selectable DAC filters provide additional flexibility for tailoring digital playback to individual preferences.

For vinyl enthusiasts, the ARCAM A50 Signature features a newly designed Class A phono stage with dedicated moving magnet (MM) and moving coil (MC) inputs. Adjustable cartridge loading options help owners optimize performance with a wide variety of compatible turntables and cartridges. Three stereo RCA line inputs and a balanced stereo XLR input accommodate additional analog components, including CD players, external DACs, and dedicated music streamers.

Modern wireless listening is another major strength of the A50 Signature. Bluetooth 5.4 supports high-quality wireless audio with aptX, aptX HD, aptX Lossless, Snapdragon Sound, Bluetooth LE Audio, and Auracast capabilities. Bluetooth audio can be received from compatible source devices or transmitted to compatible wireless headphones. A dedicated 6.3mm wired headphone connection also provides private listening without Bluetooth.

Designed to serve as the centerpiece of an evolving hi-fi system, the A50 Signature includes stereo preamplifier outputs for connecting an external power amplifier or powered subwoofer. A dedicated preamplifier mode and configurable processor mode also provide flexible integration with larger stereo and home theater systems. With substantial Class G power, comprehensive connectivity, and the engineering heritage of ARCAM's Radia family, the A50 Signature is a compelling integrated amplifier for serious music listeners who want reference-level features without sacrificing everyday convenience.

What It's Great At:

• Powerful, controlled stereo amplification: Delivers 150 watts per channel into 8 ohms and 220 watts per channel into 4 ohms, providing substantial power for dynamic music playback and demanding loudspeaker passages.
• Advanced dual-mono Class G engineering: Independent left and right amplifier modules, dedicated transformer windings, and separate power regulation help preserve channel separation, lower unwanted noise, and improve stereo precision.
• Exceptional vinyl versatility: A built-in Class A phono stage supports both moving magnet and moving coil cartridges, with adjustable loading settings to help optimize turntable performance.
• High-resolution digital music and TV audio: The ESS ES9039Q2M DAC, 32-bit/384kHz USB-C capability, coaxial and optical inputs, and HDMI eARC/ARC make the amplifier a versatile digital audio hub.
• Premium Bluetooth and headphone listening: Bluetooth 5.4, aptX Lossless, Snapdragon Sound, and Auracast capabilities complement wired and wireless headphone connections for flexible private listening.
• Flexible hi-fi and home theater integration: Balanced XLR connectivity, stereo preamplifier outputs, preamp mode, and configurable processor mode allow the A50 Signature to integrate with a wide variety of premium audio systems.

ARCAM A50 Signature Full Specifications:

General Information

• Brand: ARCAM
• Model: A50 Signature
• Product Type: High-performance stereo integrated amplifier
• Series: ARCAM Radia
• Amplifier Architecture: Dual-mono Class G
• Number of Channels: 2
• Design Origin: Cambridge, United Kingdom
• Anniversary Edition: Celebrates 50 years of ARCAM amplifier engineering

Amplifier Performance

• Continuous Power Output, 8 Ohms: 150 watts per channel, both channels driven, 20Hz–20kHz, at 0.5% THD
• Continuous Power Output, 4 Ohms: 220 watts per channel, both channels driven, 1kHz, at 0.5% THD
• Harmonic Distortion: 0.002% at 80% power, 8 ohms, 1kHz
• Amplifier Configuration: Independent left and right channel amplifier modules
• Power Supply Architecture: Independent transformer windings, dedicated power regulation, and reservoir capacitors for each channel
• Class G Architecture: Independent Class G lifter stages for each channel
• Thermal Architecture: Dedicated output-stage heatsink for each channel
• Speaker Connections: Stereo left and right binding-post terminals
• Speaker Impedance: 4–16 ohms, as indicated on the rear-panel terminals

Analog Audio Inputs

• Unbalanced Line Inputs: 3 stereo RCA pairs
• Balanced Line Inputs: 1 stereo XLR pair
• Analog Signal-to-Noise Ratio: 106dB, A-weighted, referenced to 50W with a 1V input
• Analog Frequency Response: 20Hz–20kHz, ±0.2dB

Phono Stage

• Phono Stage Type: Built-in Class A
• Moving Magnet Input: 1 stereo RCA pair
• Moving Coil Input: 1 stereo RCA pair
• Cartridge Compatibility: Moving Magnet (MM) and Moving Coil (MC)
• Published MM Input Impedance: 47k ohms + 100pF
• Selectable MM Load Capacitance: 50pF, 150pF, 270pF
• Selectable MC Load Impedance: 470 ohms, 220 ohms, 100 ohms, 70 ohms
• Phono Frequency Response: 20Hz–20kHz, ±1dB referenced to the RIAA equalization curve
• Phono Ground Connection: Dedicated ground terminal

Digital Audio Inputs

• Digital-to-Analog Converter: ESS ES9039Q2M DAC
• HDMI: 1 HDMI eARC/ARC audio input
• USB-C Audio: 1 USB-C digital audio input
• Coaxial Digital: 2 RCA coaxial digital inputs
• Optical Digital: 1 TOSLINK optical input
• USB Service Port: 1 USB Type-A port for firmware updates only; not an audio input
• Supported USB-C Sample Rates: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, and 384kHz
• Supported Sample Rates for Other Digital Inputs: 44.1, 48, 88.2, 96, 176.4, and 192kHz
• Supported Digital Bit Depths: 16-bit, 24-bit, and 32-bit
• Digital Audio Format: Two-channel PCM; multichannel and encoded audio formats are not supported
• Digital Frequency Response: 20Hz–20kHz, ±0.2dB with Filter 1
• Digital Signal-to-Noise Ratio: 109dB, A-weighted, referenced to 50W with a 0dBFS input, per product page
• Selectable DAC Filters: Apodizing, Minimum Phase Fast, Minimum Phase Slow, Linear Phase Fast, and Linear Phase Slow
• Digital PLL Settings: Normal and Wide

Bluetooth and Wireless Audio

• Bluetooth Version: 5.4
• Bluetooth Operation: Audio receiver and transmitter
• Bluetooth Profiles and Technologies: A2DP Sink/Source, AVRCP, BLE, and LE Audio
• Supported Bluetooth Audio Codecs: SBC, AAC, aptX, aptX HD, and aptX Lossless
• Additional Wireless Audio Technology: Snapdragon Sound
• Auracast: Supported for compatible Auracast broadcast reception and transmission
• Bluetooth Transmitter Frequency: 2,400–2,483.5MHz
• Bluetooth Transmitter Power: Less than 20dBm
• Bluetooth Pairing Memory: Up to 5 devices
• Wireless Headphone Support: Bluetooth audio transmission to compatible headphones
• Bluetooth Auto Switching: Configurable
• Bluetooth Maximum Input Volume: User-configurable

Headphone Output

• Wired Headphone Connection: 6.3mm (1/4-inch) stereo jack
• Maximum RMS Output Level Into 32 Ohms: 2.5V
• Maximum RMS Output Level Into 300 Ohms: 5V
• Supported Headphone Load Range: 16 ohms–2k ohms
• Headphone Output Switching: Automatically mutes speaker and preamplifier outputs by default when wired headphones are connected
• Output Override: Configurable option to keep speaker and preamplifier outputs active during wired headphone use

Audio Outputs and System Integration

• Speaker Outputs: 1 stereo pair of left and right speaker terminals
• Preamplifier Output: 1 stereo RCA pair
• Subwoofer Integration: Powered subwoofer connection supported through the stereo preamplifier outputs
• Preamp Mode: Disables the internal power amplifier for use with external amplification
• Processor Mode: Assignable fixed-volume operation on a selected analog input, excluding phono inputs
• Processor Volume: Configurable fixed-volume setting
• 12V Trigger: Trigger input and output for automatic power control
• Infrared Input: 3.5mm external IR receiver connection
• Control Input: Connection for compatible ARCAM Radia source components
• HDMI Auto Switching: Configurable automatic HDMI source selection and power-on with a compatible television
• Input Management: Configurable input visibility and input renaming
• Remote Control: Supplied IR remote

Power Requirements

• Mains Voltage: 100V, 110–120V, or 220–240V, depending on regional version
• Mains Frequency: 50–60Hz
• Maximum Power Consumption: 700W, per product page and specification sheet
• Standby Power Consumption: Less than 0.5W
• Automatic Standby: 20 minutes of inactivity by default; configurable

Physical Specifications

• Dimensions (W x D x H): 431 x 344 x 99mm
• Depth Measurement: Includes speaker terminals
• Height Measurement: Includes feet
• Net Weight: 12kg, per product page and specification sheet
• Packed Weight: 14kg, per product page and specification sheet
• Front Panel Controls: Input selector and volume control
• Packaging: Plastic-free packaging

Included Accessories

• ARCAM A50 Signature Integrated Amplifier
• IR Remote Control
• 2 AAA Batteries
• Region-specific AC Power Cable
• Quick Start Guide
• Important Safety Instructions / Safety and Compliance Documentation

ARCAM A50 Signature Q&A:

How much power does the ARCAM A50 Signature deliver?

The ARCAM A50 Signature delivers 150 watts per channel into 8 ohms with both channels driven across the 20Hz–20kHz frequency range. It also produces 220 watts per channel into 4 ohms at 1kHz, giving it substantial output capability for a wide range of compatible passive loudspeakers. Its Class G amplifier design is engineered to combine efficiency with the power reserve required for dynamic musical passages.

What makes the A50 Signature's dual-mono Class G amplifier different?

The A50 Signature is ARCAM's first dual-mono Class G integrated amplifier. Unlike conventional stereo designs that share major amplifier and power supply components, each channel has its own dedicated amplifier module, transformer winding, power regulation, reservoir capacitors, Class G lifter stage, and output-stage heatsink. This construction helps reduce unwanted interaction between channels and supports excellent stereo separation, low noise, and precise musical reproduction.

Can I connect both moving magnet and moving coil turntables to the ARCAM A50 Signature?

Yes. The A50 Signature includes a built-in Class A phono stage with separate inputs for moving magnet (MM) and moving coil (MC) cartridges, eliminating the need for an external phono preamplifier in many systems. It also offers adjustable MM load capacitance and MC load impedance settings, allowing listeners to optimize the phono stage for compatible cartridge requirements.

Can I connect my television to the A50 Signature using HDMI eARC?

Yes. The A50 Signature includes an HDMI eARC/ARC input that connects to a compatible television's corresponding HDMI audio return port. This allows TV sound to play through connected stereo speakers, with automatic HDMI switching available on compatible systems. The amplifier supports two-channel PCM audio rather than Dolby Digital, DTS, or other multichannel encoded formats, so the television should be configured to output stereo PCM.

What digital and analog audio sources can I connect to the A50 Signature?

The A50 Signature offers three stereo RCA line inputs, one balanced stereo XLR input, separate MM and MC phono inputs, two coaxial digital inputs, one optical input, HDMI eARC/ARC, and a USB-C digital audio input. Its ESS ES9039Q2M DAC supports high-resolution PCM playback up to 32-bit/384kHz through USB-C, making it suitable for computers and compatible digital music sources. Network music streaming can also be added using an external music streamer connected through an appropriate audio input.

Does the A50 Signature support Bluetooth music streaming and wireless headphones?

Yes. Bluetooth 5.4 allows the amplifier to receive audio from compatible smartphones, tablets, and other Bluetooth devices, while also supporting audio transmission to compatible Bluetooth headphones. Supported technologies include aptX, aptX HD, aptX Lossless, Snapdragon Sound, Bluetooth LE Audio, and Auracast. Actual codec availability and audio quality depend on the capabilities of the connected devices, and Bluetooth input and output cannot operate simultaneously.

Can I use wired headphones or connect a powered subwoofer to the ARCAM A50 Signature?

Yes. A dedicated front-panel 6.3mm headphone output supports compatible wired headphones with impedances from 16 ohms to 2k ohms. The amplifier also includes stereo RCA preamplifier outputs that can be used with an external power amplifier or a powered subwoofer that accepts a suitable line-level signal. Wired headphone use automatically mutes the speakers and preamplifier outputs by default, although this behavior can be changed in the settings menu.

Can the ARCAM A50 Signature be integrated into a larger hi-fi or home theater system?

Yes. The A50 Signature offers stereo preamplifier outputs, a dedicated preamp mode, and a configurable processor mode for system integration. Processor mode assigns a fixed volume to a selected analog input, allowing the amplifier to work with a compatible AV receiver or surround processor in a combined stereo music and home theater system. Phono inputs cannot be assigned to processor mode, and the fixed-volume level should be configured carefully during setup.

ARCAM A50 Signature Downloads:

ARCAM A50 Signature Owner's Manual
ARCAM A50 Signature Spec Sheet