Leak Sandwich 150 Standmount Speakers

Throughout the history of broadcasting and recording, certain exceptional developments have marked significant milestones in the progress of sound reproduction. One such milestone was the world’s first low-distortion amplifier: the famous original Leak Point One, introduced in 1945. Another major breakthrough was the invention of the highly rigid Leak sandwich cone diaphragm, which was remarkably stronger and many times stiffer than all conventional cones of its time.

Originally introduced in 1961, the Leak Sandwich used engineering and design principles from airframe construction. Now, reintroduced and re-engineered with modern advancements, the new Leak Sandwich cone features a stiff aluminum skin on the outer surfaces, where the stresses are greatest, bonded to a thick core of polymethacrylimide (PMI) based structural foam, commonly used in the aerospace and automotive industries. This precision-engineered combination of materials in optimal proportions provides immense rigidity.

As a result, the Leak Sandwich cone reproduces the signal applied to the voice coil without mechanical break-up and its associated distortions. The outcome is a remarkably smooth frequency response, free from violent peaks or troughs across a broad frequency range, indicative of an excellent transient response.

The profound influence of the loudspeaker housing (the cabinet) on overall acoustic performance is often underestimated. Designing it requires a high degree of electroacoustic knowledge, comparable to that needed for designing the motor units themselves.

The new Leak Sandwich cabinet benefits from 60 years of technological development since the original. Its structure comprises MDF and composite board, creating a second 'sandwich' reference with layered boards for optimal cabinet strength. This new cabinet design combines intelligent bracing with the 'sandwich' of materials and maintains specific front-rear bracing, featuring the distinct, visible countersunk screw on the rear—a famous trait of the original. Leak audio devices embody a blend of science and innovation, with industrial design that often garners favourable attention.

Similar to the warmly received Leak Stereo 130 and 230 integrated amplifier models, the new Leak Sandwich 150 and 250 loudspeaker models retain the understated, classic Leak styling. Finished in a luxurious walnut real-wood veneer, the cabinet is adorned with an aluminum trim insert, matched and finished to the same exemplary standards as the driver trims and cone materials.

The decorative grille cloth is purposefully chosen to match the classic Leak styling and specified 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. Beyond maintaining industrial design traits, the meticulous placement of each driver ensures a truly precise stereo soundstage. In the Leak Sandwich 150 and 250, the high-frequency driver incorporates 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 but also reduces the resonant frequency of the treble unit.

Lowering the resonant frequency below the crossover region allows the bass, mid, and high frequencies to be seamlessly integrated, enhancing detail and harmonics without harshly adjusting the high-frequency definition. This integration is achieved by a meticulously developed crossover, refined over thousands of hours of listening, not just through simulation, as is common in modern loudspeaker design. The Leak Sandwich 150 features a 2-way standmount design with a combination of a 6.5” (170mm) low-frequency 'Sandwich' driver and a 1.2” (30mm) coated textile dome high-frequency driver.

We endeavour to despatch same day for orders placed up to 1pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is received. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK Orders

We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as DPD or UPS.

International Orders:

Due to the nature of our products and brand restrictions we are only able to send certain items internationally. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Hifisound or by the courier with a request for any further information required. Customs duties can apply for shipments to any countries outside of the UK depending on where the product you have bought is made. Customers are responsible for all taxes and duties incurred when the items enter their country.

Collect in Store or Home Install

At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock.