Coaxial Speaker Drivers
A coaxial driver is a specialized design that mounts two drivers—typically a tweeter and a mid-range—on the same axis, with one positioned in the center of the other. The acoustic benefit of this design is that it creates a single “point source” from which all sound emanates. This leads to improved coherence, imaging, and a more stable soundstage off-axis. This guide lists the manufacturers that engineer these clever, integrated driver units for hi-fi and studio applications.
Hi-Fi brands in the category
Summary information and image
Direct links to official websites
BC Speakers
B&C Speakers is an Italian specialist in professional loudspeaker transducers, supplying both its own catalogue and OEM designs to manufacturers worldwide. Its roots reach back to Roberto Coppini and Fernando Borrani’s post-war work in Florence; the company identifies 1946 as the start of continuous production. From its facility in Bagno a Ripoli, B&C develops and manufactures low-frequency cone drivers, compression drivers, coaxial units, horns and line-array components for touring systems, installed sound, cinemas and high-output monitors. Engineering combines finite-element modelling, material development, precision machining and rigorous power and reliability testing. The wider group also includes Eighteen Sound, Ciare and Eminence, but B&C retains its own product programme and Italian manufacturing identity. The entry title remains unchanged for import matching, while the description uses the manufacturer’s correct B&C styling.
Celestion
Celestion has shaped both electric-guitar tone and professional loudspeaker engineering from the level of the drive unit itself. The story began in 1924, when Cyril French worked with Eric Mackintosh to develop one of the earliest practical cone loudspeakers; Celestion was initially the product name before becoming the company identity. The British manufacturer is now best known for guitar speakers such as the Blue, G12M Greenback, G12H, Creamback and Vintage 30, whose controlled cone breakup is treated as part of an instrument amplifier’s sound rather than unwanted distortion. Its professional range includes ferrite and neodymium low-frequency drivers, compression drivers and coaxial units for sound reinforcement. The AxiPeriodic Axi2050 is a notable modern development, covering roughly 300 Hz to 20 kHz with one annular diaphragm and avoiding a midband crossover. Celestion also supplies impulse responses and Dynamic Speaker Responses, translating its physical driver catalogue into tools for digital cabinet simulation.
Cube
Cube Audio is a Polish loudspeaker and driver manufacturer founded by physicist Grzegorz Rulka and loudspeaker designer Marek Kostrzyński. The company’s central project is the high-performance full-range driver: a transducer expected to reproduce most or all of the audible spectrum without a crossover dividing the critical midband. Cube develops and builds its own large paper-cone drivers, magnet systems, suspensions and field-replaceable elements, then matches them to carefully tuned cabinets. The Nenuphar family demonstrates the purest version of the idea, using a single wideband unit per channel and a cabinet loading system engineered to extend bass without sacrificing immediacy. Other models adapt the same driver knowledge to different room sizes and bandwidth requirements. Removing the crossover can improve phase continuity and point-source imaging, but it places unusually high demands on cone profile, moving mass and motor linearity; those are the areas where Cube’s know-how resides. The brand is therefore more than a boutique cabinet maker: it controls the transducer technology that gives its loudspeakers their distinctive coherence and directness.
Dayton Audio
Dayton Audio is the house audio brand associated with Ohio-based Parts Express, serving builders, installers and value-conscious listeners with components that are normally sourced from many separate suppliers. Its catalogue spans individual tweeters, midrange and woofer drivers, passive radiators, subwoofer plate amplifiers, class-D amplifier boards, DSP modules, finished subwoofers, compact speakers and complete kits. Reference and Signature drivers provide measured parameters for original loudspeaker designs, while Ultimax subwoofers prioritise long excursion and power handling. Just as important is the supporting tool chain: the DATS measurement system helps builders determine driver impedance and Thiele-Small parameters, and project documentation makes the parts usable rather than merely inexpensive. Dayton also collaborates with independent designers on kits and supplies OEM or custom-installation solutions through Parts Express. Its distinctive strength is breadth with technical accessibility — drivers, electronics, measurement and practical documentation within one ecosystem — making it especially useful to DIY loudspeaker builders who want compatible parts and test tools from one source.
DD Audio
DD Audio, originally Digital Designs, is an American mobile-audio manufacturer founded by Jassa and Vicki Langford in Southern California in 1986 and based in Oklahoma City since 1991. The company is best known for high-output subwoofers that are engineered and hand-built in the United States, including reconeable competition-oriented models rather than sealed imported assemblies. DD develops motor structures, voice coils, suspensions and cone systems around defined power and excursion requirements; its Z-series neodymium architecture represents the extreme sound-pressure end of that work, while 2500, 3500 and 9500 families serve progressively more demanding daily and competition systems. Amplifiers, component speakers, pro-audio-style Voice Optimized drivers and vehicle-specific or universal enclosures complete the signal chain. The catalogue also extends to marine products, but car audio remains the centre of gravity. DD Audio’s individuality lies in retaining domestic subwoofer engineering, assembly and service capability while spanning both sound-quality installations and very-high-SPL competition — two uses that demand different alignments, cooling and mechanical durability.
Fostex
Fostex connects Japanese transducer manufacturing with tools used by recording engineers, musicians and hands-on loudspeaker builders. The company was created in 1973 as an independently managed subsidiary of Foster Electric, whose OEM loudspeaker experience gave the new brand an unusually deep production base. In 1974 it introduced RP, or Regular Phase, technology: a planar diaphragm carrying a printed conductor and driven across its surface in phase. Successive RP generations power the long-running T50RP family and newer premium planar-magnetic headphones, while the TH series explores dynamic drivers and crafted wooden housings. Fostex also makes active studio monitors, field and multitrack recorders, headphone amplifiers, microphones and professional accessories. A second, equally distinctive part of the catalogue is its raw loudspeaker components, including full-range drivers, compression tweeters and enclosure kits used in commercial and DIY designs. That breadth explains why the name appears both in studios and in enthusiast-built speaker systems.
Morel
Morel is an Israeli loudspeaker and drive-unit specialist whose complete home and car systems are grounded in nearly five decades of transducer manufacturing. Meir Mordechai founded the company in 1975; the name derives from Mordechai Electro-acoustics. Morel remains family owned and develops raw drivers as well as finished products, giving it control over the motor, suspension, diaphragm and enclosure rather than forcing a speaker design around catalogue parts. The brand’s signature technologies include large External Voice Coils, which place the magnetic motor inside the coil for efficient use of magnetic energy, and Hexatech aluminium wire shaped to pack the winding with minimal air gaps. Hybrid neodymium/ferrite magnet systems, damped polymer composite cones and soft-dome midrange units appear across different applications. Home-audio lines such as Sopran, Avyra and Högtalare sit alongside architectural models, car-audio components and OEM drivers supplied to other makers. Morel’s distinction is therefore broader than a particular “sound”: it is the unusual overlap of specialist driver engineering, hand assembly and the ability to carry the same motor and diaphragm know-how from a raw transducer to a complete loudspeaker.
RFC
RCF is an Italian professional-audio manufacturer founded in Reggio Emilia in 1949, originally producing loudspeakers and microphones for other companies. The title “RFC” in this database is a transposition; the brand connected to the supplied rcf.it address is RCF. Decades of designing and manufacturing its own transducers remain central to the company: compression drivers, woofers, horns, enclosures, amplification and DSP are developed as parts of one system rather than assembled from unrelated modules. RCF was an early force in self-powered professional loudspeakers, and the ART series, introduced in the 1990s, became one of its most recognisable product families for portable PA, musicians and events. The current catalogue stretches from ART, NX and compact installation speakers to HDL line arrays and the high-output TT+ Audio range for touring, theatres and stadium-scale systems. SUB models, stage monitors and digital mixers complete the live-sound side, while D-Line and architectural products address fixed installations. RDNet provides networked control and monitoring of large systems; FiRPHASE processing is used to align phase response through the crossover region, and Bass Motion Control extends useful low-frequency behaviour while protecting the transducer. RCF’s value is the depth of that vertical integration. It can apply the same driver knowledge to a compact active cabinet and to a flown line-array module, then supply the electronics and software needed to deploy both predictably. The company is not a domestic hi-fi brand despite the similarity of some terminology: its reputation was built on reliable, intelligible and scalable sound for professionals.
SB Acoustics
SB Acoustics is an Indonesian loudspeaker-driver brand conceived in 2008 by Sinar Baja Electric together with the Danish engineering consultancy Danesian Audio. The previous 1981 date belongs to the older history of Sinar Baja Electric, not to SB Acoustics itself. This collaboration explains the brand’s unusual structure: transducers are developed in Denmark and manufactured in Indonesia in facilities with deep experience in cones, voice coils, motors and complete loudspeaker production. The standard SB range made carefully engineered tweeters, midranges, woofers and passive radiators accessible to both commercial manufacturers and DIY designers. Satori moves higher with refined motor systems, low-loss suspensions and diaphragms such as Egyptian papyrus, Textreme carbon fibre and proprietary composite constructions. Beryllium domes, ring-radiator tweeters and shallow-profile drivers extend the options for demanding two-channel, home-cinema and automotive designs. The company publishes detailed response, distortion and impedance data and supports complete kits, allowing a designer to work from measured behaviour rather than brand mythology. SB Audience, launched separately in 2020, applies the parent company’s manufacturing knowledge to professional sound-reinforcement drivers; it should not be confused with the core SB Acoustics hi-fi lines. Nor is the company simply an importer attaching a European name to generic units: the Danish-Indonesian partnership is the product strategy, combining specialised development with vertically integrated, repeatable production. SB Acoustics became influential because it offers serious transducer technology across price levels, from practical OEM and DIY drivers to ambitious Satori units that can anchor genuinely high-end loudspeakers.
Voxativ
Voxativ is the Berlin loudspeaker company founded by engineer Inès Adler to pursue full-range reproduction without a conventional crossover. Its loudspeakers ask one highly specialised driver to cover most or all of the audible spectrum, avoiding the phase and integration problems created where separate bass, midrange and treble units hand the signal to one another. Making that principle work requires exceptionally light paper cones, carefully controlled suspensions and powerful magnetic motors. Voxativ designs and manufactures its own drivers in Germany, offering both permanent-magnet versions and field-coil models whose magnetic field is supplied electrically. The drivers are sold separately for specialist projects, but their natural context is the company’s complete loudspeakers. Ampeggio established the brand internationally with a rear-loaded horn folded inside a tall cabinet; the compact Hagen and Pi designs adapt the same single-driver logic to smaller rooms, while the modular 9.87 and 9.88 systems add dedicated bass sections when greater scale is required. Field-coil power supplies and low-powered amplification complete the ecosystem. Voxativ does not pretend that a crossoverless speaker is the universal answer: efficiency, cabinet loading and room placement are integral to the result. Its achievement is the depth with which one concept has been developed—from cone formulation and motor construction to horn geometry and complete systems—giving the brand a recognisable technical and musical character rather than merely another variation on a multiway box.