Arcam SA45 Streaming Amplifier

Introduction to the Arcam SA45

The Arcam SA45 is a flagship streaming integrated amplifier from Arcam's Radia series, unveiled at High End Munich 2024. Designed and built in Cambridge, UK, the SA45 represents the pinnacle of Arcam’s engineering expertise, combining high-fidelity audio performance with cutting-edge streaming capabilities. This amplifier is tailored for audiophiles who demand exceptional sound quality and modern convenience in one sophisticated package.

Design and Build Quality

The SA45 draws inspiration from Arcam's renowned A49 integrated amplifier but takes it to new heights with innovative features and a refined aesthetic. The chassis is constructed with precision, featuring a robust linear toroidal power supply that minimizes noise while enhancing performance. Its sleek design includes an 8.8-inch high-resolution display that showcases album artwork and metadata, offering a visually engaging experience even from across the room.

The amplifier’s fully balanced digital and analog audio paths ensure minimal interference and optimal signal integrity. This meticulous attention to detail underscores Arcam’s commitment to delivering an uncompromised listening experience.

Amplification Technology

At the heart of the SA45 lies Arcam's fifth-generation Class G amplification technology. This advanced system delivers 180 watts per channel into 8 ohms (or 300 watts into 4 ohms), making it capable of driving even demanding speakers with ease.

Class G amplification operates efficiently by utilizing multiple power supplies. During low-level signals, it functions in pure Class A mode, which minimizes crossover distortion and preserves subtle audio details. When higher power is required, additional reserves are dynamically engaged without compromising sound quality. This intelligent design ensures both efficiency and outstanding sonic performance.

Streaming Capabilities

The SA45 integrates a state-of-the-art streaming platform that supports a wide range of services:

• Apple AirPlay 2
• Google Chromecast
• Spotify Connect
• Tidal Connect
• Roon Ready certification

Connectivity options include Ethernet and dual-band Wi-Fi for seamless integration into home networks. Additionally, two-way aptX Adaptive Bluetooth enables high-quality wireless audio streaming both to and from compatible devices.

Supported file formats include FLAC, WAV (LPCM), AAC, ALAC, AIFF, DSD (up to DSD1024), MP3, MP4, OGG, WMA at resolutions up to 32-bit/768 kHz. This extensive compatibility ensures that users can enjoy their music library in its highest fidelity.

Inputs and Outputs

The SA45 offers versatile connectivity options to accommodate various audio sources:

• Digital Inputs: Two optical (TOSLINK), two coaxial (RCA), and one HDMI eARC input for direct connection to televisions or other digital sources.
• Analog Inputs: Three single-ended RCA line-level inputs and one balanced XLR input.
• Phono Stage: A switchable MM/MC phono stage caters to vinyl enthusiasts.
• Outputs: Dual subwoofer outputs are available in both single-ended RCA and balanced XLR variants for flexible subwoofer integration.

These comprehensive input/output options make the SA45 suitable for diverse setups ranging from traditional stereo systems to more complex configurations involving multiple components.

Room Correction with Dirac Live

One standout feature of the SA45 is its inclusion of Dirac Live Room Correction with Bass Control. This advanced calibration tool analyzes your room’s acoustics using a supplied measurement microphone and adjusts the audio output accordingly. By compensating for room-specific issues such as reflections or standing waves, Dirac Live ensures a balanced and immersive listening experience.

Future firmware updates are expected to enable independent optimization for dual subwoofers—a feature particularly beneficial for asymmetrical subwoofer placements.

User Interface and Control

The user interface of the SA45 is designed for simplicity without sacrificing functionality:

• The large front-panel display provides clear navigation through settings and playback information.
• Control knobs on either side of the screen allow intuitive adjustment of volume levels or source selection.
• The ARCAM Radia App offers additional control options such as presets, internet radio access, podcast playback, and more.

This combination of physical controls and app-based management makes operating the SA45 straightforward for users at any level of technical expertise.

Performance Highlights

Power Output

Continuous power output: 180W per channel into 8Ω; 300W per channel into 4Ω.

Harmonic Distortion

Exceptionally low harmonic distortion at just 0.002% at 80% power (8Ω load).

Signal-to-Noise Ratio

Analog inputs achieve an impressive signal-to-noise ratio of 106 dB (A-weighted).

Frequency Response

Flat frequency response within ±0.2 dB across the audible spectrum (20 Hz–20 kHz).

These specifications highlight the precision engineering behind the SA45’s ability to deliver clean, dynamic sound across all types of music genres.

Conclusion

The Arcam SA45 streaming integrated amplifier exemplifies what happens when traditional high-fidelity principles meet modern digital innovation. With its robust Class G amplification technology, comprehensive streaming support, advanced room correction capabilities via Dirac Live, and versatile connectivity options—all housed within an elegant design—the SA45 stands out as a top-tier choice for discerning audiophiles.

Whether you’re building your first high-end system or upgrading an existing setup, the Arcam SA45 offers unparalleled performance combined with user-friendly features that make it a worthy centerpiece for any home audio environment.

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