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Should we greet a company that builds cables for other IEMs with surprise, when they approach the summit with their own IEM release? If there were expectations, then they certainly had not been as great as Allegro – PlusSound's flagship tri-brid IEM that's their take on what 12 drivers can really do. Headfonics awarded nearly full marks after being taken by surprise by Allegro's performance. Twister6 praised a flawless first execution. This is PlusSound at the forefront of high-end personal audio, moving to the centre of your consideration with dual dynamic drivers in push-pull isobaric configuration, six balanced armatures and four electrostatic tweeters coaxially mounted in Allegro's nozzle. Allegro's supporting cast is stellar. A crossover that's a work of art keeps her drivers ticking over as one sound and quietly showcases PlusSound's pedigree as an IEM builder. A sleeping giant, now awakened, launching a flagship that packs a bass that excites, an accurate, articulate and natural mid-range, and no shortage of treble extension. And cables are brilliant as expected, with choice of Copper+ or Hybrid+ premium 2-in-1 shield coax type litz connecting you to sources that highlight the vast technical ability Allegro is capable of. [See Product Desc. For More] Cayin Audio's N8ii and HiBy Music's RS8 are naturally worthy of feeding Allegro. But part of PlusSound's brilliance here was designing a crossover that operates at a virtually flat 10ohm impedance and electrical phase, while granting their first flagship 112dB/mW of sensitivity.  Allegro will always be a powerhouse that scales based on source quality, but as a fairly benign load all listeners will enjoy excellent sound from more humble DAC/amps and music players.  Indeed, said crossover is the platform to perform for Allegro's drivers. PlusSound's low-order network feeds both dynamic driver bass and electrostatic treble sections. Their slow frequency roll-off slopes ensure accurate phase reproduction and maximum cohesion in their assigned audible band. And these simpler, lower-order signal paths utilise fewer components such that the crossover saps as little power as possible, ensuring maximum transparency, dynamics and detail reach the bass and treble units. Allegro's dual dynamic drivers, operating in push-pull isobaric fashion, are more than capable of keeping up with the extended range they operate in. Both stiff yet well-damped as they rise higher in frequency, these large 10mm drivers are mounted in a 3D-printed acoustic enclosure with a massive rear vent. That aids decompression out of phase, lowering air resistance within their chamber for greater excursion and better drive. PlusSound similarly mounted Allegro's electrostat tweeters where they would have maximum effectiveness. Placed coaxially against the IEM spout for the best directivity, their wide-frequency bandwidth extends up into the ether. Their low-order crossover sees these Sonion electrets enjoy the best sensitivity and power-to-SPL conversion, for audibly excellent dynamic ability. In between are six mid-range balanced armature drivers, this time working under high-order slopes to keep them in their ideal range of reproduction to avoid unduly taxing them. All 12 drivers are masterfully placed in Allegro's shell for maximum frequency and time-domain performance connected by Copper XS, an in-house designed cryogenically-treated Type 6 UP-OCC wire with proprietary insulation. PlusSound's attention to detail extended to their accessorisation, with custom-designed silicone eartips for ideal acoustics beyond the shell showcasing the technical potential of Allegro. And PlusSound's flagship Exo Copper+/Hybrid+ cables are included for the perfect signal path to source, placing their secondary twisted litz wire bundle used as the core and unique silver shielding to reduce EMI for listening not plagued by interference.  Allegro packs quality inside and out. Its polished, anodised, cryogenically-treated aluminum faceplate, body and nozzle carved from seven-axis CNC, and rhodium-plated tellurium copper 2-pin connectors, guarantee PlusSound's flagship will be as life-proof as its sound is timeless. Proudly carry Allegro in PlusSound's leather storage case cum IEM display stand whether you listen on the go or at home. Such is her performance that you'll never want it to leave your side. Because if you were surprised by PlusSound's entry into the high-end IEM arena, then that shock extends to the IEM clinic they just put on after over two years of research & development. While you're enjoying Allegro, explore how you can cable up your other transducers with PlusSound here, or view our other favourite IEMs here.

Vocal lovers, pay attention to PlusSound's basic Exo. There's more than meets the eye for Exo, and this beautiful build made in USA has a beautiful way of handling the mid-range on both IEMs and headphones alike. With a way of pushing upper mids just so slightly forward, Exo allows females vocals to shimmer without fatigue before fading off into the air. PlusSound's entry is particularly effective on the Vision Ears EXT, Audio-Technica ADX-5000, Focal Clear MG and Sony's MDR-Z1R, for starters. Easy on the ears, Exo has a way of relaxing an overly-tense presentation – perfect for an evening listen in the lounge that still packs resolution, and one of the best cable builds Head-Fi has ever seen. [See Product Desc. For More] PlusSound build Exo of four high quality, custom manufactured UPOCC stranded wires. With a durable and flexible proprietary PlusSound insulation, Exo is then braided to provide better quality sound while reducing low range and interference noises.  PlusSound implement a Type 6 Litz wire design that will prevent electrical anomalies such as skin effect and proximity effect, in addition to eliminating oxidation by applying a special enamel coating to individually insulate every strand for long lasting sound quality and appearance. The multiple proprietary dampening cores function to reduce vibration – keeping conductivity constant throughout for the best quality sound. After production, PlusSound wires are cryogenically treated to strengthen the structure of the wires for maximum durability and performance. Exo is the perfect solution for use on the go, at home, or on stage. With excellent ergonomics, sound quality, and constructed with only the highest quality components on the market, Exo is the best interchangeable cable available. View what PlusSound are capable of higher up the line here, or check out our other cable builds here.

PlusSound's Sonora is a real crowd pleaser. An evolution of Allegro alongside Volta, this eight-driver co-flagship's U-shaped tuning puts you in the best listening chair for a wide-range of listening genres at incredible yet relaxed fidelity. The tri-brid Sonora is a new concept redefining what you can expect from eight drivers. Tuned according to the Fletcher-Munson curve for great presence at lower listening volumes, elevated isobaric dual dyanamic driver sub-bass and electrostatic highs, PlusSound's newest release never fails to immerse. Achieving better integration with the rest of the frequency spectrum, Sonora's electrostatic tweeters benefit from a crossover that's a work of art. They flank four mid-range drivers. And though PlusSound's tuning is never mid-focused, their capable combined SPL means mids are full of detail yet effortless – never strained to produce the demands of your music no matter how intense it gets. Placed within a new ergonomic shell that ensures Sonora's drivers always perform as intended into a multitude of ear shapes and sizes, all three types are kept ticking over as one sound, and quietly showcases PlusSound's pedigree as an IEM builder [See Product Desc. For More] PlusSound's brilliance here was designing a crossover that operates at a virtually flat 10ohm impedance and electrical phase. Indeed, said crossover is the platform to perform for Sonora's drivers. PlusSound's low-order network feeds both dynamic driver bass and electrostatic treble sections. Their slow frequency roll-off slopes ensure accurate phase reproduction and maximum cohesion in their assigned audible band. And these simpler, lower-order signal paths utilise fewer components such that the crossover saps as little power as possible, ensuring maximum transparency, dynamics and detail reach the bass and treble units. Sonora's dual dynamic drivers, operating in push-pull isobaric fashion, are more than capable of keeping up with the extended range they operate in. Both stiff yet well-damped as they rise higher in frequency, these large 10mm drivers are mounted in a 3D-printed acoustic enclosure with a massive rear vent. That aids decompression out of phase, lowering air resistance within their chamber for greater excursion and better drive. PlusSound similarly mounted Sonora's electrostat tweeters where they would have maximum effectiveness, albeit with smoother integration with her quad mid-range balanced armatures. Placed coaxially against the IEM spout for the best directivity, their wide-frequency bandwidth extends up into the ether. Their low-order crossover sees these Sonion electrets enjoy the best sensitivity and power-to-SPL conversion, for audibly excellent dynamic ability. In between are four mid-range balanced armature drivers, this time working under high-order slopes to keep them in their ideal range of reproduction to avoid unduly taxing them. All eight drivers are masterfully placed in Sonora's shell for maximum frequency and time-domain performance. PlusSound's attention to detail extended to their accessorisation, with custom-designed silicone eartips for ideal acoustics beyond the shell showcasing the technical potential of Sonora. The team significantly refined Sonora's shape, resulting in a much more comfortable and better-fitting design. Production has also been enhanced with the incorporation of engraving machinery, allowing for intricate patterns to be precisely etched onto each model. PlusSound pushed the boundaries of manufacturing by utilizing advanced 7-axis CNC and engraving machines to create one of the most intricate earphone designs to date. Each shell undergoes a meticulous finishing process, including polishing, anodising, and cryogenic treatment to enhance surface durability and protect against damage from drops.  Sonora's all-aluminum housing provides an acoustically inert environment, effectively reducing unwanted vibrations and resonances that can distort the sound. While you're enjoying Sonora, experience Allegro here, how you can cable up your other transducers with PlusSound here, or view our other favourite IEMs here.

PlusSound's Volta is an evolution of Allegro alongside Sonora, and a step further in their mission to develop world-beating IEMs. After a decade of releasing cables to tune the work of other earphone manufacturers, PlusSound have now released a new generation to hit the desired frequency targets themselves. The tri-brid Volta is a new concept redefining what you can expect from six drivers. Tuned neutrally with respect to the Harman curve with elevated isobaric dual dyanamic driver sub-bass, upper mids and electrostatic highs, Volta benefits from PlusSound's experience with tweeter integration. Achieving better integration with the rest of the frequency spectrum, Volta's electrostatic pair benefit from a crossover that's a work of art. Placed within a new ergonomic shell that ensures Volta's drivers always perform as intended into a multitude of ear shapes and sizes, all three types are kept ticking over as one sound, and quietly showcases PlusSound's pedigree as an IEM builder [See Product Desc. For More] PlusSound's brilliance here was designing a crossover that operates at a virtually flat 10ohm impedance and electrical phase. Indeed, said crossover is the platform to perform for Volta's drivers. PlusSound's low-order network feeds both dynamic driver bass and electrostatic treble sections. Their slow frequency roll-off slopes ensure accurate phase reproduction and maximum cohesion in their assigned audible band. And these simpler, lower-order signal paths utilise fewer components such that the crossover saps as little power as possible, ensuring maximum transparency, dynamics and detail reach the bass and treble units. Volta's dual dynamic drivers, operating in push-pull isobaric fashion, are more than capable of keeping up with the extended range they operate in. Both stiff yet well-damped as they rise higher in frequency, these large 10mm drivers are mounted in a 3D-printed acoustic enclosure with a massive rear vent. That aids decompression out of phase, lowering air resistance within their chamber for greater excursion and better drive. PlusSound similarly mounted Volta's electrostat tweeters where they would have maximum effectiveness, albeit with smoother integration with her mid-range balanced armatures. Placed coaxially against the IEM spout for the best directivity, their wide-frequency bandwidth extends up into the ether. Their low-order crossover sees these Sonion electrets enjoy the best sensitivity and power-to-SPL conversion, for audibly excellent dynamic ability. In between are two mid-range balanced armature drivers, this time working under high-order slopes to keep them in their ideal range of reproduction to avoid unduly taxing them. All six drivers are masterfully placed in Volta's shell for maximum frequency and time-domain performance. PlusSound's attention to detail extended to their accessorisation, with custom-designed silicone eartips for ideal acoustics beyond the shell showcasing the technical potential of Volta. The team significantly refined Volta's shape, resulting in a much more comfortable and better-fitting design. Production has also been enhanced with the incorporation of engraving machinery, allowing for intricate patterns to be precisely etched onto each model. PlusSound pushed the boundaries of manufacturing by utilizing advanced 7-axis CNC and engraving machines to create one of the most intricate earphone designs to date. Each shell undergoes a meticulous finishing process, including polishing, anodising, and cryogenic treatment to enhance surface durability and protect against damage from drops.  Volta's all-aluminum housing provides an acoustically inert environment, effectively reducing unwanted vibrations and resonances that can distort the sound. While you're enjoying Volta, experience Allegro here, how you can cable up your other transducers with PlusSound here, or view our other favourite IEMs here.

PlusSound's six-core X6 is here as the affordable flagship braid for your IEMs and headphones. Proof that the ultimate signal path can both be abundant in conductor surface area and still malleable, draping beautifully, PlusSound's X6 is there to demonstrate your best transducers can still benefit from these special geometry cables proudly made in the USA. The extra cross-sectional area of X6 means gains on this PlusSound are audible – an immediately better conduit for detail to flow compared to normal four-wire braids. Greater grunt is apparent in the low-end with a beautiful mid-range and treble delicacy to boot, never tipping over the finely-judged tonal balances of ZMF Headphones. [See Product Desc. For More] X6 adds two additional wires onto PlusSound's Exo series to create an exotic six-wire cable with custom designed UPOCC strands protected by durable and flexible polyethylene outer insulation. These are braided to provide better quality sound, while reducing low range and interference noises. Type 6 Litz wires will prevent electrical anomalies such as skin effect and proximity effect. In addition, PlusSound prevent oxidation by applying a special enamel coating to individually insulate every strand, for long-lasting sound quality and appearance. The multiple proprietary dampening cores function to reduce vibration – keeping conductivity constant throughout for the best quality sound. All wires are cryogenically treated to strengthen the structure of the wires for maximum durability and performance. PlusSound construct X6 with the highest quality components make this the very best performing and quality interchangeable cable on the market. To hear what else they're capable of, check out PlusSound's other builds here, or view all our other cables here. 

PlusSound's eight-core X8 is here as the affordable flagship braid for your IEMs and headphones. Proof that the ultimate signal path can both be abundant in conductor surface area and still malleable, draping beautifully, PlusSound's X8 is there to demonstrate your best transducers can still benefit from these special geometry cables proudly made in the USA. A beautiful, natural soundstage filled with air accompanies grain-free detail given the extra cross-sectional area of X8. Expand the capabilities of ZMF Headphones this way without tipping tonal balance over into any unwanted access. [See Product Desc. For More] X8 series doubles the wires, sound, and build of PlusSound's basic Exo by using eight high-quality, custom designed UPOCC stranded wires with durable and flexible polyethylene outer insulation. These are braided to provide better quality sound, while reducing low range and interference noises. X8's Type 6 Litz wires will prevent electrical anomalies such as skin effect and proximity effect. In addition, PlusSound prevent oxidation by applying a special enamel coating to individually insulate every strand, for long-lasting sound quality and appearance. The multiple proprietary dampening cores function to reduce vibration – keeping conductivity constant throughout for the best quality sound. All wires are cryogenically treated to strengthen the structure of the wires for maximum durability and performance. PlusSound construct X8 with the highest quality components make this the very best performing and quality interchangeable cable on the market. To hear what else they're capable of, check out PlusSound's other builds here, or view all our other cables here.