Music Servers HDD Storages
A music server is a specialized computer designed to store, manage, and deliver your personal digital music collection with the highest possible fidelity. Combining dedicated storage (HDD or SSD) with powerful library management software (like Roon), it acts as the ultimate hub for enthusiasts with large libraries of ripped or downloaded music files. This page is a guide to the manufacturers that build these high-performance solutions for organizing and playing local digital audio.
Hi-Fi brands in the category
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Direct links to official websites
432 EVO
432 EVO builds music servers around a choice of playback modes: bit-perfect output, upsampling, or optional real-time pitch conversion to a 432 Hz tuning reference. This flexibility is central to the Belgian brand, whose parent company Klinkt Beter has a background in Linux and network systems. The brand was established in 2013 by Klinkt Beter, which had been founded in 2008. Its servers use a customised Linux operating system, internal SSD storage and USB output for an external DAC; models such as the Standard also include a CD-ripping drive. Listeners can therefore bring a disc collection and stored music into one playback system, while choosing whether to leave the digital signal unchanged or use processing.
B.Audio
B.Audio attacks digital reproduction at its most fragile point: timing. Brothers Cédric and Sébastien Bermann founded the French company in 2016, combining experience in electronics, signal processing, precision measurement and acoustic engineering. Its proprietary SJR process addresses jitter across incoming digital signals, while asynchronous network interfaces and locally managed clocks reduce dependence on the source device. The B.dac and B.dpr established the architecture; EX versions add network playback, and the B.amp and B.amp mono extend the same low-noise approach into power amplification. The more accessible One series combines DAC, preamplifier and optional streaming functions with matching amplification. Components are developed and assembled in Alsace. B.Audio’s real distinction is a coherent digital-clock and analogue-stage design philosophy carried through an entire electronics system.
CasaTunes
CasaTunes builds the server, software and distribution hardware behind professionally installed whole-home music systems. Founded in Colorado in 2006, the American company approaches multi-room audio as an integration platform rather than a collection of independent wireless speakers. CasaTunes Plus servers provide multiple simultaneous high-resolution streams, while Dante servers place those streams on networked professional-audio systems; matrix amplifiers distribute sources to wired zones. Each room can also appear as an AirPlay or Spotify Connect endpoint. The CasaTunesX interface runs across phones, tablets and web browsers, and CasaTunes Manager gives installers remote diagnostics and fleet control. Native integrations cover Control4, Crestron, KNX, Lutron, Nice/ELAN, RTI, Sonos and many third-party audio matrices, with REST and WebSocket APIs available for custom projects. This combination is especially useful when modernising an existing wired installation without discarding its speakers, cabling or amplification.
Cocktail Audio
Cocktail Audio turns a physical CD collection and modern streaming services into one library that can be managed without a computer. The South Korean brand was launched by NOVATRON in 2006, three years after its parent company was established, with a CD-ripper and music server designed for home audio rather than the IT market. Its X-series components combine several jobs that are usually split among separate boxes: ripping and tagging discs, storing music on an internal drive, network playback, internet radio, digital-to-analogue conversion and, on selected models, amplification. Broad file-format support and large front-panel displays make the systems useful to listeners who want the convenience of a music database while retaining their existing discs and local files. Models have ranged from source-only servers such as the X50 family to all-in-one players such as the X14 and X35. Cocktail Audio’s distinctive know-how is therefore not a single circuit but the integration of storage, metadata, playback and hi-fi hardware into one practical component.
Innuos
Innuos is a Portuguese digital-audio company founded in 2009 by computer engineers Amelia Santos and Nuno Vitorino. Its music servers and streamers are designed as complete playback systems in which storage, network behaviour, power, clocking and software are treated together. ZEN, ZENith and Statement machines combine ripping, library storage, streaming and server duties, while PULSE and PULSAR models concentrate on streaming; PhoenixNET and PhoenixUSB address network and USB noise and timing elsewhere in a system. The company’s Sense operating system and app are central to the experience, unifying local music, internet services, metadata and playback control without requiring the owner to administer a general-purpose computer. Hardware design adds low-noise power supplies, vibration control and carefully selected interfaces, with higher models increasing isolation and clock precision. Innuos stands out because its founders’ computing background is used to simplify digital music while the hardware remains purpose-built for audio.
LampizatOr
LampizatOr is a Polish digital-audio specialist founded by engineer Łukasz Fikus, best known for DACs in which valves form an essential part of the analogue conversion path. The unusual name combines the Polish word “lampa,” meaning valve, with a playful reference to the Terminator; it began with Fikus’s published experiments modifying commercial CD players before growing into a manufacturer with its own hardware. LampizatOr rejects the assumption that every converter should be a compact, fully integrated chip-based appliance. Depending on the model, its DACs combine proprietary digital processing, substantial linear power supplies and valve output stages, with directly heated triodes used in the upper ranges. The Horizon, Pacific, Golden Gate, Baltic and Atlantic families show how the concept scales from comparatively approachable designs to multi-chassis statement products, and many units offer selectable output valves or modular options. The company also builds digital transports and analogue components. LampizatOr’s appeal lies in this crossover of computer-era source engineering and traditional valve practice: not a generic promise of “analogue sound,” but a deliberately serviceable, configurable architecture with a strong designer’s fingerprint.
Lumin
Lumin is a Hong Kong network-audio brand created by Pixel Magic Systems, a company with a background in digital video and signal processing. After two years of development, the first Lumin player appeared in late 2012 as an early network streamer capable of native DSD playback. That digital-source focus remains intact. Current products range from integrated network players with analogue outputs to digital transports, streaming preamplifiers, power amplifiers and the L2 music library/server. The flagship X2 uses Lumin’s discrete dual-mono DAC architecture, precision clock distribution, separate analogue power stages and optical SFP networking; P-series products add input switching and volume control, while U-series transports omit the analogue converter for owners of an external DAC. The Lumin app, OpenHome support and Roon integration provide library and service control, and compatible models implement Leedh Processing for loss-minimised digital volume adjustment. Linear external or dual-stage internal power supplies and machined aluminium cases address electrical and mechanical noise. Lumin’s strength is not merely format support: hardware, firmware, network behaviour and the control application are developed as one playback platform, with updates extending products long after launch.
Melco
Melco is the Japanese network-audio lineage that applies storage and data-network engineering to music libraries, servers, players and audiophile Ethernet switches. Audiophile Makoto Maki founded Maki Engineering Laboratory Company—MELCO—in Nagoya in 1975 to make audio equipment. The business later became best known through the Buffalo computer and networking brand, then returned to specialist audio roughly four decades later with dedicated Melco music libraries. Products such as the N1, N10 and N100 were designed as purpose-built audio sources rather than ordinary NAS appliances. Their engineering addresses electrical noise, vibration, storage behavior and network traffic through separate player and LAN ports, selected drives, rigid chassis, dedicated power supplies and software developed for music importing, library management and playback. Matching network switches and optical-network accessories extend the same system approach. In 2025 the audio company marked its fiftieth anniversary and began the next phase under the DELA name; the underlying company history and product expertise continue. The brand’s distinctive idea is straightforward but technically demanding: digital files remain data, yet the server, network and power environment delivering them can still influence the analogue result of a high-resolution playback system.
Naim
Naim Audio is the Salisbury electronics maker whose reputation rests on amplifiers and sources designed to preserve musical timing and momentum. Julian Vereker’s early amplifier work grew from a contract for Capital Radio, and Naim Audio was incorporated in 1973 with Vereker and Shirley Clarke as directors. The first consumer power amplifiers established a deliberately direct circuit philosophy; the NAP 250, introduced in 1975, became the long-running reference, while the compact NAIT integrated amplifier showed that the same priorities could work in an affordable system. Naim later built complete upgradeable systems around separate preamps, power amps and external power supplies, then became an early serious adopter of network replay. Uniti streaming amplifiers and Mu-so wireless systems broadened the audience, while ND sources, the New Classic separates and Statement amplification maintain the specialist end. Mechanical isolation, low-noise power regulation, carefully controlled grounding and proprietary streaming software matter more to the engineering than the familiar shorthand “PRaT.” Naim joined French loudspeaker maker Focal in 2011 under VerVent Audio Group, while design and production remained centred in Salisbury. In August 2026 Belgium’s Barco completed its acquisition of VerVent, so Naim is now part of Barco while retaining its British origin, brand and manufacturing identity.
Playback Designs
Playback Designs was formed in 2008 by digital-audio engineer Andreas Koch, joining Swiss-German engineering with an American company base. Koch’s experience predates the brand by decades: at Studer ReVox he developed an early asynchronous sample-rate converter and received a patent in 1984; he later worked on Dolby digital systems, Sony’s Sonoma eight-channel DSD recorder and the digital architecture of EMM Labs products. Playback Designs began with an integrated SACD/CD player that also accepted external digital sources, making the disc machine the hub of a high-resolution system. The current Dream Series includes MPD-8 and MPD-8AI DACs, MPT-8 transport, MPS-8 integrated player and SPA-8 power amplifier. Edelweiss models such as MPD-6, MPS-6 and MPS-X bring related architecture to a smaller range, while Pinot converts analogue sources to DSD. Koch avoids standard off-the-shelf DAC operation where it would limit future development: programmable, discrete conversion and proprietary algorithms allow major processing changes through software. PDFAS clocking and signal processing address jitter without a conventional fixed PLL, while the optical PLink connection carries audio between components with galvanic isolation and coordinated timing. The important story is not a list of formats. Playback Designs applies knowledge gained while creating professional DSD recorders to consumer playback, then keeps the digital platform reprogrammable so expensive hardware can evolve as algorithms and interfaces change.
Revox
Revox is a Swiss audio company whose story began in 1948, when engineer Willi Studer opened a business in Herisau and developed the Dynavox tape recorder. Revox became the name for the consumer products, while Studer served professional studios and broadcasters; the shared engineering culture made reel-to-reel machines such as the A77 and B77 enduring references for robust mechanics, serviceability and recording quality. The brand later expanded into complete systems, including the B-series electronics and loudspeakers, but tape remains an important part of its identity. In 2024 Revox introduced the B77 MK III, a newly manufactured reel-to-reel recorder rather than a cosmetic reissue, bringing the format back into current production with revised electronics and modern manufacturing. Contemporary Revox is broader than analogue tape. The company develops modular multiroom and custom-installation systems, networked amplifiers, servers, speakers and control interfaces intended to distribute music through an entire home. STUDIOART provides compact wireless products, JOY and STUDIOMASTER components address network playback and amplification, and the T700 turntable connects the brand’s precision-mechanical tradition with vinyl. Revox also maintains restoration and service activity for classic machines, an important distinction for equipment with decades of working life. The company has passed through ownership and organisational changes since the Studer era, but its strongest products still follow the original logic: sources, electronics, speakers and control designed as a coordinated system. Revox is therefore best understood not merely as a historic tape-recorder name, but as a rare bridge between Swiss recording heritage and current integrated audio.
Rockna
Rockna Audio is a Romanian digital-audio manufacturer founded in 1999 by engineer Nicolae Jitariu. The company designs its converters, digital filters, clocking and FPGA logic in-house, taking control of the data path instead of building products around an off-the-shelf DAC reference board. Its best-known component is Wavedream DAC, which uses a proprietary discrete R-2R ladder architecture and programmable FPGA processing. The Wavedream NET provides a matching disc transport, network bridge and server, allowing Rockna to manage the signal before it reaches the converter. Wavelight brings the same design culture to a more compact DAC and analogue preamplifier, while Wavelight Server, introduced as the platform evolved, handles library storage, streaming and network playback. Rockna’s emphasis is on timing and mathematical precision: custom digital filters, very low-jitter clock systems and galvanic isolation are designed together, and firmware can refine behaviour after the hardware leaves the factory. The analogue output stages and power supplies are developed as seriously as the numerical conversion, because the company treats a DAC as both a digital computer and an analogue source component. Manufacturing in Romania and a tightly focused catalogue have allowed Rockna to preserve this engineering continuity across product generations. The brand’s individuality lies in refusing the usual divide between software company and hardware boutique. From server and transport to FPGA filter, resistor ladder and output stage, it tries to own each consequential step of digital playback—and to make those steps transparent rather than hiding them behind format badges.
Roon Labs
Roon Labs is an American music-software company founded in 2015 by Enno Vandermeer, Danny Dulai and Brian Luczkiewicz after their work on Sooloos and later Meridian’s networked music platform. Roon does not operate as another streaming service. Its software builds a richly connected library from a listener’s local files and supported online catalogues such as Qobuz and TIDAL, then links recordings through credits, compositions, performers, reviews, release versions and recommendations. The result is closer to an editorial music database with a playback engine than to a folder browser. Roon Server performs library management and audio processing, while control apps can run across computers, tablets and phones. RAAT—Roon Advanced Audio Transport—provides synchronised multiroom playback and underpins the Roon Ready certification used by a wide range of network players, DACs and active speakers. Built-in DSP covers sample-rate conversion, parametric equalisation, convolution filters, headroom and channel management, with a visible signal path showing what happens to the audio. Roon ARC extends access to the user’s own library away from home. For listeners who do not want to maintain a computer, Nucleus One and Nucleus Titan provide dedicated server hardware. Harman acquired Roon in November 2023, placing the company within the Samsung-owned audio group while stating that Roon would continue its open device ecosystem. Roon’s key achievement is not simply attractive album art: it unifies metadata, discovery, local ownership, streaming and reliable device control without requiring the rest of the system to come from one hardware manufacturer.
Silent Angel
Silent Angel is the network-audio brand of Thunder Data, a technology company established in 2014 with experience in storage, networking and embedded computing. The brand focuses on the digital source before the DAC: music servers, streaming transports, network switches, master clocks, low-noise power supplies and the software required to control them as one system. Rhein Z1 and Z1 Plus servers run Silent Angel’s VitOS platform and can host music libraries and services, including Roon-based workflows, without placing a general-purpose computer beside the audio rack. Munich and Bremen players address network playback, while the Bonn family of switches—from the compact N8 to higher N8 Pro, N8C, NX and dual-zone N16 designs—adds low-noise power, clock control and, on selected models, SFP fibre connections. Genesis GX/GC clock products provide an external timing reference for compatible network devices, and Forester linear supplies or ground-control products let owners improve power without replacing the whole source. VitOS Manager and current companion apps handle configuration, playback and integration with local storage, NAS libraries and streaming platforms. Silent Angel’s claims about network noise and jitter should be judged in a complete system, but the architecture is clear: separate the compute-intensive server, the network link and the endpoint feeding the DAC, then control electrical coupling through fanless hardware, regulated power and optical isolation where useful. Although the brand is Taiwanese in origin, development and company operations are international. Its distinguishing feature is not any single “audiophile switch,” but a modular ecosystem in which computing, networking, clocking, power and user software are designed to work together.
Small Green Computer
Small Green Computer is an American specialist in fanless music servers and network-audio systems. Its central idea is to remove the noisy, maintenance-heavy general-purpose computer from the listening room and divide digital playback into clear jobs. A sonicTransporter server stores the library and runs software such as Roon, Audirvāna, HQPlayer, Squeezebox or DLNA services; a separate Rendu network endpoint receives the stream and hands it to a DAC, usually over USB. Current sonicTransporter i7 and i9 generations provide different processing headroom for large libraries, multiroom playback and demanding HQPlayer upsampling, while the WhirlWind offers another server configuration. The endpoint side includes Sonore-branded ultraRendu, opticalRendu and Signature Rendu SE models. This brand relationship is important: Small Green Computer supplies the servers and complete system pathway, while the Rendu products carry the Sonore name rather than being renamed SGC devices. The systemOptique concept uses fibre Ethernet to break the conductive electrical path between network sections, and the company also supplies compatible optical modules, switches and low-noise linear DC power. Fanless cases, purpose-built operating images and remote support make the products appliances rather than DIY Linux computers, yet advanced users retain access to multiple playback ecosystems. Small Green Computer’s strength is integration and long-term human support: server, optical network, endpoint and power can be selected as one chain, while users are not locked into a single library application. No sufficiently reliable founding year is published, so the date remains blank.
Taiko Audio
Taiko Audio is a Dutch manufacturer specializing in ultra-high-end digital audio components, particularly music servers. Founded by Emile Bok. The company is known for its “SGM Extreme” music server, which is widely regarded as one of the best, and most expensive, digital audio sources in the world. Taiko Audio’s design philosophy is centered around minimizing all forms of noise and interference, both electrical and mechanical, that can degrade the quality of the digital audio signal. They utilize extreme measures in their construction, including custom-designed components, elaborate power supplies, and extensive vibration control. The SGM Extreme is characterized by its ability to deliver an incredibly detailed, dynamic, and natural sound from digital music files, often described as approaching the quality of the best analog sources. Taiko Audio products are positioned at
Totaldac
Totaldac is the French digital-audio company founded in 2010 by engineer Vincent Brient. It grew from Brient’s long personal work on digital conversion and became known for refusing the standard integrated DAC chip. Instead, Totaldac builds discrete resistor-ladder converters from proprietary boards populated with closely selected resistors, then controls them with FPGA-based digital processing. This architecture gives the company direct responsibility for the conversion behaviour rather than limiting it to the configuration of another maker’s silicon.
The original d1 series established the approach, followed by more ambitious multi-chassis and multi-ladder models. Current families include d1-unity and higher-order variants such as tri-unity and twelve, alongside server, streamer, reclocker and clock products. Tube or transistor output choices appear in parts of the range, and Totaldac has also developed amplification and loudspeakers to form complete systems. The names can be complex, but they generally indicate how many proprietary DAC boards and channels are used and how the analogue stages are arranged.
Totaldac’s importance comes from the coherence of its independent path. Resistor matching, switching, clocking, digital filtering, power supplies and analogue output stages are all treated as audible parts of conversion. Brient also offers proprietary filtering choices rather than pursuing a single textbook response. The result is not a nostalgic “non-oversampling” label attached to ordinary hardware, but a French-built platform refined across sources and systems. Totaldac remains one of the clearest examples of a small manufacturer turning an original discrete DAC module into a complete digital ecosystem.
Trigon
Trigon Elektronik is a German hi-fi manufacturer founded in September 1996 by Ralf Kolmsee and Rainer Reddemann. The partners set out to build components that would remain technically useful, repairable and visually current for years rather than follow short product cycles. Audio is only one expression of their engineering base: the company has also designed and manufactured electronic control systems for industrial applications.
Trigon’s first notable product was the Vanguard phono preamplifier, a foundation that continues in the highly adjustable Vanguard III and matching Volcano III power supply. The catalogue expanded through integrated and power amplifiers, preamplifiers, CD players and network sources. Compact Exxceed components combine streaming and amplification for modern systems, while Exxact and Exxpert address source and headphone duties. Larger models such as the Epilog integrated amplifier and Monolog power amplifiers show the brand’s high-current, dual-mono side without abandoning straightforward operation.
The names and understated cases can make Trigon easy to overlook, yet the range is unusually coherent. Separate power supplies, modular options and careful analogue stages allow products to grow with a system, while the company’s industrial work reinforces attention to thermal stability and long service life. Trigon’s appeal is not a fashionable house sound described in adjectives. It is the quieter German virtue of continuity: the founders remain associated with the company, established models are refined through successive versions, and phono, digital and amplification products share the same concern for durable engineering at realistic high-end prices.
Wadax
Wadax is a Spanish digital-audio specialist based in Madrid, where its core research, circuit design, prototyping and software development take place. The brand was established by Javier Guadalajara in 2006, drawing on technical work begun within the Guadalajara family decades earlier; the 1958 date sometimes attached to Wadax belongs to that prehistory, not to the company itself. Wadax concentrates on the conversion and transport errors that can make digital replay dependent on timing, power and the electrical load presented by the next stage. Its proprietary musIC technology uses feed-forward error correction and models the behaviour of converter circuits under dynamic load instead of treating a DAC as an ideal isolated block. That research first appeared in electronics beyond conventional digital sources, then matured into the Atlantis and Reference families. Reference DAC, Server and Transport can operate as a complete source, with dedicated Reference PSU supplies and Akasa optical links separating data transfer from ordinary noisy interfaces. Atlantis components bring related ideas to a somewhat less extreme platform, while the newer Studio line integrates the technology into more compact products. Enclosures, power architecture and mechanical construction are developed alongside the signal processing; specialist aerospace-grade suppliers manufacture precision parts to Wadax specifications rather than the products simply being “made in Switzerland,” as older summaries sometimes claim. Wadax’s defining quality is this system view of digital audio: server, clocking, interface, conversion and power are engineered as interacting elements, not independent boxes connected only at the end.
Waversa Systems
Waversa Systems is a South Korean digital-audio company founded in 2012 by engineer Dr Collin Shin. Before entering high-end audio, Shin worked on semiconductor and system design, experience that shaped a catalogue unusually focused on the behaviour of data, clocks, networks and power inside a complete replay chain. The company announced its WAP—Waversa Audio Processor—platform in 2013 and later developed WNDR, Waversa Network Direct Rendering, as a proprietary route for delivering audio over a network with tighter control of timing and processing. These technologies appear across network players, DACs, servers and hubs rather than belonging to one showcase product. The range spans compact WMini components, WStreamer bridges, WDAC converters, WCore servers and WRouter or WSmartHub network products, as well as integrated players, amplifiers, phono stages and the reference WV series. Waversa also makes Ethernet and USB filters because it treats electrical noise entering through digital connections as part of the source design. Product names and formats vary widely, but the unifying objective is consistent: minimise jitter and unwanted processing, isolate noisy subsystems and preserve the signal through conversion and amplification. Waversa’s distinctiveness lies in approaching a hi-fi system as a networked electronic architecture, not a stack of unrelated boxes. Hardware, FPGA or processor code and control software are developed together in Korea, giving the brand a coherent technical vocabulary that extends from an inexpensive interface filter to its largest source and amplification components.
Zidoo
Zidoo is a Shenzhen-based electronics company founded in 2014 and best known for media players designed around locally stored film libraries. Its early Android boxes combined broad format support with HDMI output, but the X9S of 2016 established a more specialised direction: reliable 4K playback, automatic frame-rate and resolution switching, Blu-ray menu handling and an interface suited to large collections. Poster Wall software scans files, retrieves artwork and metadata and presents a cinema library without exposing the underlying folder structure. Later Z9X, Z10 Pro and UHD models added Dolby Vision processing, HDR conversion, dual-drive storage, linear power supplies and progressively stronger audio sections. Current 8K-generation players continue this separation between the media library, video engine and high-quality AV output, with flagship chassis intended for dedicated theatres. Zidoo also entered two-channel audio with NEO players and developed streaming-focused products through the related Eversolo brand, but the two names should not be collapsed: Zidoo remains primarily the home-cinema and local-media platform. The company develops firmware, mobile control, library management and hardware together, which is why long-term software behaviour matters as much as the selected system-on-chip. Its strength is practical integration rather than inventing a new video codec: one appliance can index large local libraries, decode uncommon disc structures, output modern HDR formats and provide the control and connectivity expected in an installed cinema.