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Leak Sandwich 150

Leak Sandwich 150

Normalpris 8.799,00 DKK /Par
Normalpris Udsalgspris 8.799,00 DKK /Par
Udsalg Udsolgt
Inklusive skat.

The Leak Sandwich 150 and 250 are the pinnacle of innovation that commenced in 1961 with the original Leak Sandwich. Those technological advancements are implemented with the utmost regard for tradition, as well as the continual aspiration to forge sound reproduction equipment of the highest quality, accessible to every discerning audiophile.

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The Leak Sandwich 150 and 250 are the pinnacle of innovation that commenced in 1961 with the original Leak Sandwich.

Those technological advancements are implemented with the utmost regard for tradition, as well as the continual aspiration to forge sound reproduction equipment of the highest quality, accessible to every discerning audiophile.

A major loudspeaker invention
Throughout the history of broadcasting and recording, certain exceptional developments have become milstones in the progress of sound reproduction.

One such milestone was the world’s very first low distortion amplifier – the famous original Leak Point One, in 1945.

Another was the pioneering major breakthrough with the invention of the fantastically rigid Leak sandwich cone diaphragm – which was demonstrably of great strength and many times stiffer than all conventional forms of cone, of its time.

To understand the impact of this innovation, one must remember that to obtain low distortion, the movement of a loudspeaker diaphragm, or cone, should follow as accurately as possible the waveform of the signals applied to its voice coil.

The ability of the current to follow these impulses accurately depends upon the lightness and stiffness of the cone assembly.

Many conventional cones: paper, impregnated fabric, plastics, aluminium etc all generally suffer from low stiffness.

This results in significantly larger areas of the cone vibrating in motion, uncontrolled by the voice coil.

These uncontrolled emotions produce transit “hangover”, amplitude distortion (peaks and troughs in the frequency response) and intermodulation distortion (lack of clarity of spurious tones).

Those shortcomings are inherent in almost all direct radiator loudspeaker systems using conventional cones, irrespective of cost.

 

All of these shortcomings are overcome by the Leak Sandwich construction.

Originally presented in 1961, the Sandwich used engineering and design principles applied to airframe construction.

Now, reintroduced and re-engineered with modern-day learnings, the new Leak Sandwich cone comprises of a stiff aluminium skin for the outer surfaces (where the stresses are greatest) bonded to a thick core of a polymethacrylimide (PMI) based structural foam, often used aerospace and the automotive industries.

This applied, precision-engineered use of the most suitable materials in optimum proportions and dispositions gives immense rigidity.

This means the Leak Sandwich cone reproduces the signal applied to the voice coil, totally free from mechanical break-up and its associated distortions. The result is a remarkably smooth frequency response, free from violent peaks or troughs over a very broad frequency range, indicative of an excellent, transient response.

It is not often sufficiently realised how profound the influence of the loudspeaker housing (the cabinet) is on the overall acoustic performance.

Its design requires a great degree of electroacoustic knowledge as a design of the motor units themselves.

The new Leak Sandwich cabinet benefits from 60 years of technological development since the original.

The structure consists of a composition of MDF and composite board, thus creating a second ‘sandwich’ reference, with the boards layered for optimum cabinet strength.

While the new cabinet fuses intelligent bracing with this ‘sandwich’ of materials, it also maintains a specific front-rear bracing, with the distinct, visible countersunk screw on the rear – a famous trait of the original.

The technology found within Leak audio devices presents science and innovation in abundance, yet the industrial design often draws favourable attention.

Just like the warmly received Leak Stereo 130 and 230 integrated amplifier models, the new Leak Sandwich 150 and 250 loudspeaker models maintain the understated, classic Leak styling. Finished in a sumptuous walnut, real-wood veneer, the cabinet is decorated with an aluminium trim insert matched and finished to the same exemplary standards of the driver trims and cone materials.

The decorative grille cloth is purpose chosen to match the classic Leak styling with a specification for maximum acoustic transparency.

A keen eye will also notice that the new Leak Sandwich 150 and 250 are supplied in perfectly matched pairs with a ‘handed’ array presentation.

Much more than continued industrial design traits, the meticulous placement of each driver is considered to the nth degree, thus enabling a projection of a truly precise stereo soundstage.

With the Leak Sandwich 150 and 250, the high-frequency driver has been developed, incorporating a rear chamber damped to absorb the output from the back of the dome.

This innovation not only isolates the HF unit from the rest of the loudspeaker, it has the added benefit of reducing the resonant frequency of the treble unit.

Taking the resonant frequency below the crossover region means the audible spectrum of the bass, mid and high frequencies can be sewn together with an added dimension of detail and harmonics, eliminating the requirement to harshly adjust the definition of the high-frequencies.

And that very sewing is conducted by a crossover of the highest order, developed over thousands of hours of listening, not just simulation as is the tendency in modern loudspeaker design.

 

The Leak Sandwich 150 comes in the format of a 2-way standmount loudspeaker with a combination of 6.5” (170mm) low-frequency ‘Sandwich’ driver and a 1.2” (30mm) coated textile dome high-frequency driver.

Specifikationer Model Sandwich 150
General description 2-way vented-box/standmount
Design philosophy and core technology
Enclosure type Bass reflex
Transducer complement 2-way
ABR
Bass driver 6.5"(170mm) Aluminium-Foamcore Sandwich cone
Midrange driver
Treble driver 1.2"(30mm) Coated Textile Dome
Full-range driver
AV shield No
Sensitivity (2.83V @ 1m) 86.5dB
Recommended amplifier power 25-150W
Peak power handling
Peak SPL 106dB
Nominalimpedance 6Ω (8Ω Compatible)
Minimumimpedance 4 Ω
Frequency response(+/-3dB) 44Hz - 26kHz
Bass extension(-6dB) 38Hz
Crossover frequency 2.4kHz
Cabinet Volume (in litres) 19.6L

Dimensions(mm)
Height (on plinth) 415mm
Width 250mm
Depth (with terminals) (290+25)mm
Carton size 650*400*530mm
Net weight 12.3kg/pcs
Gross weight 27kg/ctn

Finish Real Wood Veneer - Walnut

Standard accessories Rubber feet
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