Borresen Acoustics Børresen Z5
The Børresen Z5 is a commanding floorstander built around exceptionally clean treble, expansive imaging and remarkable composure when orchestral music turns demanding. Fidelity Magazine found its low-resonance engineering preserves fine instrumental detail amid full-scale dynamic peaks, while the ribbon tweeter brings pure, unforced resolution. This is reference-style transparency designed to let exceptional recordings breathe.
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Nicely Roasted
Sound Quality
87/100
Build Quality
84/100
Value for Money
91/100
Pros
Exceptionally clean, artifact-free treble from the ribbon tweeter, with finely resolved string and woodwind detail.
Maintains orchestral detail and composure through forceful brass and percussion climaxes, with little apparent compression or masking.
Creates a comprehensive, effortless soundstage and largely disappears as a physical sound source.
Ambitious in-house engineering, including lightweight composite diaphragms and an iron-free motor system, supports its low-distortion presentation.
Cons
Its highly revealing, low-coloration character can initially seem restrained to casual listeners and rewards attentive listening.
A very expensive high-end loudspeaker, despite the review finding its engineering and performance persuasive for the money.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 87/100
The available review finds the Z5 Cryo exceptionally transparent, composed and revealing, with an ability to disappear as a sound source and expose the character of the recording and associated system. Treble refinement, large-scale organisation and low-level resolution receive especially emphatic praise, although the review offers less direct commentary on bass character and midrange tonality.
Bass
81/100
The reviewer does not directly describe bass extension, weight, texture or control. Large orchestral material remains intelligible during forceful brass and percussion passages, but there is not enough specific low-frequency commentary to draw stronger conclusions.
Mid
80/100
There is little direct discussion of vocal timbre, instrumental body or the midrange crossover region. The review's wider praise for freedom from masking and faithful reproduction suggests strong clarity, but it does not characterise the midband in detail.
Treble
96/100
The ribbon tweeter is praised for an unusually clean presentation, notably free of the artifacts listeners often associate with high-frequency reproduction. The reviewer describes hearing pure, unadulterated sound rather than added edge or distortion, alongside very fine detail from strings and woodwinds.
Soundstage Imaging
93/100
The Z5 Cryo is said to sketch a comprehensive and effortless image of a complex musical event. Its ability to avoid sounding like a conventional physical source is also presented as a major strength, helping the system disappear behind the recording.
Dynamics
95/100
During demanding Richard Strauss orchestral climaxes, the reviewer heard no meaningful loss of information, even with vehement brass and percussion attacks. Fine orchestral detail remained easy to follow, suggesting exceptional composure and low perceived compression under pressure.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
84/100
The review describes highly ambitious driver engineering, including lightweight carbon-and-Nomex diaphragms, iron-free motor systems and extensive cryogenic treatment of metal components. It says little, however, about cabinet finish, terminal quality, fit and finish, or long-term durability in use.
Value for Money
91/100
At approximately €50,000 per pair for the Cryo version, this is an unambiguously high-end purchase. Even so, the reviewer explicitly concludes that buyers get substantial “bang for your buck,” finding the performance and engineering persuasive at this level.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
YouTube Reviews
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Specifications
- Speaker
- H x W x D: 151,0 x 23,0 x 70,0 cm H x W x D: 59,4 x 9.1 x 27.6 inches Weight: 75,0 kg 154.32 lbs
- Frequency response
- 25Hz – 50KHz
- Sensitivity
- 90 dB / 1W
- Impedance
- 4 ohms
- Recommended Amplifier
- > 50W
- 1 x Tweeter
- Børresen planar ribbon tweeter
- 2 x Driver
- Børresen bass/midrange driver: 5 inches
- 4 x Driver
- Børresen bass/midrange driver: 8 inches
- Finish
- Black or white satin painted
Manufacturer's Description — Borresen Acoustics
7 unit wonder
The Børresen Z5 Cryo Edition speaker is the top end loudspeaker of the Z-series and guarantees unsurpassed clarity, detailed subtlety, and unadulterated purity in its musical performance. This speaker opens up a new dimension of authentic sound experience of high-end music with amazing dynamics, natural lightness, and emotional passion.
Technologies and Components
Cryogenic process
Extreme treatment, huge improvement. Cryogenic treatment of all metal components of the loudspeaker results in a further significant improvement in conductivity – unleashing the finest and most subtle musical details. When metal components undergo cryogenic processing, they are subjected to extreme cooling. In the wake of this process, the crystal structure of the metal contracts more and more. Alloying elements are pushed out of the grain structure of the metal, which now becomes very similar to a monocrystal. These structural changes in the metal have a profound effect on its audio properties, resulting in an increase of conductivity by 6-8%.All metal components in the M-series undergo cryogenic treatment. The cryogenic processing cycle requires a 3-day-time window. Within the first 24 hours, the metal undergoes a cooling process from room temperature to cryogenic temperatures. During the second 24 hours, the metal parts are held at temperatures around -196°C (-321°F) before the temperature, within the next 24 hours, returns gradually to room temperature. The gradual cooling and heating is critical to avoid any thermal stress. The process strengthens and compresses the grain structure of the metal components and reduces inherent residual stress that occurs when metal solidifies from its liquid phase to a solid phase.
The Børresen tweeter
Børresen RP94 Ribbon Planar TweeterElaborate finite element methods have been applied to linearize and optimize the magnetic flux field, to facilitate driver movement and to ensure high efficiency and outstanding linearity.The efficiency of this closed ribbon tweeter amounts to an exceptional 94dB and operates from approximately 2.5 kHz upwards. The moving mass is extremely low at 0.01 grams. The totally concealed tweeter has the capacity to operate at an incredible speed, which is an absolute prerequisite to unlocking the most subtle and refined sound details of any kind of music. The enormous robustness of this tweeter allows it to handle extremely high transient peaks without any ear fatiguing breakups. No transformers are being used.
Membrane – Bass/midrange
Impressing stiffness to weight ratio. The Børresen membrane consists of a composite of two layers of very thin carbon on both sides of a 4 mm Nomex honeycomb core. This composite structure – like the one used in formula 1 type of racing cars – provides the ultimate combination of stiffness to weight ratio. The exceptionally low weight of only 5.5 grams allows a very high acceleration factor in the driver, resulting in both outstanding resolution and higher efficiency.
Magnet system – Bass/midrange
Conventional principle, unconventional performance. With the invention of the patented iron-free driver system in the 0-series, Børresen Acoustics came to realize that it is possible to reduce induction to an amazing 0.04 mH, which is approximately 10 times lower than that of common driver systems. The challenge for manufacturing the Z-series was to design a new, but less costly driver system with significantly reduced induction. As a result, Børresen Acoustics developed a driver with an 8 mm voice coil and an induction of only 0.06 mH. By linearizing the magnetic field, the driver is less affected by the actual movement and is more easily controlled by the amplifier.
Crossover Z-series
Exclusive components and stability. The Z-series is fitted with a parallel crossover configuration using the same exclusive components from the 0-series. This ensures a very mechanically stable crossover, which minimizes its own resonance.
Ansuz feet
Resonance control option.The adjustable feet of the ground cross plate are designed to be placed on Darkz resonance control separated by 3 titanium balls. Ansuz Darkz have been designed to ensure a distinctly better mechanical grounding to the floor.
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- 110Hz — online and in-store — Kielce, Województwo świętokrzyskie, Poland (website)
- A Tube High Fidelity — online and in-store — Almere, Flevoland, Netherlands (website)
- Alta Fedelta — online and in-store — Lombardia, Italy (website)
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- Audio Magic - EU — online and in-store — Wola, Województwo mazowieckie, Poland (website)
- Audio Salon — in-store — Boca Raton, Florida, United States (website)
- AudioMagic.pl — online and in-store — Warszawa, Województwo mazowieckie, Poland (website)
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