Amplifiers Worth Hearing

This broad editorial survey is a useful starting point for anyone considering classic amplification rather than a single-product recommendation.

It evaluates influential vintage models with attention to price-to-quality value and auction availability.

The NAD 3020 illustrates the guide’s appeal: despite a modest 20 W per channel rating, it is noted for dynamic performance and an ability to work with low-impedance speakers. Because vintage condition can vary substantially, the list is best used to identify candidates before arranging inspection and servicing checks.

The Quad Artera Pre is designed for listeners who want meaningful tonal adjustment without abandoning a high-quality analogue control centre.

Its Tilt control changes the balance between upper and lower frequencies in 1 dB steps around approximately 700 Hz, while three bass settings provide further adjustment.

Settings can be assigned separately to individual inputs, helping compensate for differences between sources. Connectivity includes three line-level RCA inputs, a Class A phono input switchable for MM and MC cartridges, and a balanced XLR input. Direct mode is available when minimal signal intervention is preferred.

The Arcam A5 packages the core requirements of a modern stereo system into one integrated amplifier.

Its Class D output is rated at 50 W per channel into 8 ohms, while a moving-magnet phono stage accommodates a turntable without an external phono preamplifier.

A 24-bit/192 kHz DAC handles digital conversion, Qualcomm aptX Adaptive Bluetooth supports wireless playback, and a dedicated headphone amplifier adds private-listening flexibility. The combination makes the A5 particularly relevant where space and system simplicity matter.

This is an advance look at two forthcoming Constellation Audio ranges rather than a completed product assessment.

Reference 2 is positioned below the company’s Statement series and is described by the manufacturer as using advanced technology, premium materials and carefully selected components.

Performance 2 is announced alongside it, but the supplied information does not establish model line-ups, specifications, prices or delivery details. These series may interest established high-end system owners, but meaningful comparison should wait until complete technical and product information is available.

The Devialet Dione Opéra de Paris is a special-edition soundbar rather than a traditional stereo amplifier, but its integrated ADH hybrid amplification makes it relevant to buyers seeking a self-contained alternative.

The internal system is rated at a total of 950 W and drives eight long-throw oval bass units, a central spherical ORB module and four full-range drivers directed forward, upward and sideways.

It can be installed horizontally or vertically. Its defining distinction from the standard Dione is cosmetic: a 22-carat-gold upper finish and a colour scheme inspired by the Palais Garnier.

The miniDSP SHD Power is built to replace several separate components.

It combines a network streamer, DAC, digital signal processor, volume control and stereo power amplifier, while analogue outputs allow connection of as many as two active subwoofers.

Digital sources can include SPDIF, AES/EBU, USB audio, USB media, network storage, web radio and supported online streaming platforms. Its SHARC processor runs Dirac Live room correction and also provides parametric equalisation, crossover, mixing and dynamics tools. Calibration requires a compatible UMIK measurement microphone, which is sold separately.

Despite the source title’s broader wording, the No.

523 is a six-input dual-mono preamplifier intended to control a system built around separate power amplification.

It provides two balanced and three unbalanced line-level inputs, plus a Pure Phono input. The Class A phono section supports MM and MC cartridges with selectable loading and gain-related settings. Balanced and unbalanced stereo outputs are joined by a front-panel 6.3 mm Class A Main Drive headphone output designed for headphones up to 32 ohms. Ethernet/IP, RS-232, USB control, 12 V triggers and infrared input support integration into more complex installations.

Roksan’s Caspian Series 4G comprises an Integrated Amplifier and a Streaming Amplifier.

Both use the company’s Euphoria amplification architecture and Rapture digital-to-analogue conversion technology, while the streaming version adds the BluOS platform for high-resolution playback and multi-room use.

The range also includes analogue connectivity, preamplification and phono facilities, although the supplied material does not provide detailed input lists or output ratings. Both models are hand-built at Monitor Audio Group’s headquarters in Rayleigh, Essex.

The compact SMSL A300 offers substantial rated output and several operating options for a desktop or space-conscious passive-speaker system.

Its Infineon-based digital amplifier stage is rated at 165 W per channel into 4 ohms or 85 W per channel into 8 ohms.

It can also operate in bridged mono mode, rated at 330 W into a 4-to-8-ohm load. RCA, Bluetooth 5.0 and USB inputs are provided, alongside electronic volume control, an OLED display and remote control. The provision for a 2.1-channel system adds flexibility where a subwoofer is part of the plan.

The supplied article places the Accuphase E-480 within the Japanese manufacturer’s long-standing emphasis on high-fidelity engineering and limited specialist production.

Accuphase is described as avoiding assembly-line methods and prioritising sound reproduction over fashion-led product cycles.

However, the available extract does not include the E-480’s power output, inputs, internal architecture or operational features. It therefore establishes brand context and the model’s integrated-amplifier category, but does not provide enough product-specific evidence for a detailed comparison.