LEAK Sandwich 100 Loudspeaker - Walnut

What Makes the LEAK Sandwich 100 Different from a Typical Compact Standmount?

The LEAK Sandwich 100 is a two-way, bass-reflex standmount loudspeaker built around a 5.75-inch (150mm) mid/bass cone made from Rohacell structural foam bonded between aluminium skins with aerospace-grade adhesives. This layered construction gives the cone a strength-to-weight ratio that a single-material cone can't easily match, so the diaphragm stays rigid under drive while remaining light enough to move quickly. The practical result is reduced cone break-up, faster transient response, and lower distortion than a conventional cone of similar size tends to produce. LEAK first used this sandwich principle in 1961, and the Sandwich 100 carries the same core idea forward with modern materials. A long-throw motor system with a high-gauss magnet and a low-loss suspension drives the cone, giving it controlled linear movement even at higher listening levels. A 1.2-inch (30mm) coated textile dome tweeter handles the top end; its diameter is larger than the dome tweeters typically fitted to speakers of this size, which lets it hand over to the mid/bass driver at a lower crossover point while improving power handling. Between the two drivers, the Sandwich 100 covers a frequency response of 49Hz to 20kHz within ±3dB.

Which Amplifiers Suit the LEAK Sandwich 100?

The LEAK Sandwich 100 is rated at 86dB sensitivity with a nominal impedance of 6 ohms, dropping to a minimum of 4.8 ohms, and it's also compatible with 8-ohm amplifier outputs. LEAK recommends amplifier power between 25 and 100 watts, a wide enough window to suit most compact and mid-range integrated amplifiers rather than requiring specialist high-current amplification, and the speaker's peak SPL of 102dB indicates the headroom available before the drivers reach their output limit. LEAK names the Stereo 130 and Stereo 230 integrated amplifiers, alongside the TruStream network player, as its recommended electronics for building a complete system around the Sandwich 100.

Where Should the Speaker Be Positioned for Correct Bass Extension?

The Sandwich 100 is fitted with a rear-firing bass-reflex port that extends low-frequency output down to 44Hz at -6dB from a 10.6-litre enclosure, a strong figure for a cabinet this size. Because the port fires backwards, the speaker needs clearance behind it rather than being pushed flush against a wall, so the port can load correctly and the bass stays controlled instead of becoming boomy or indistinct. The speaker ships with rubber feet, which help it sit securely on a shelf or piece of furniture and reduce the transmission of cabinet vibration into the surface beneath it. At 340mm high on its plinth, 210mm wide, and 250mm deep plus a further 20mm for the rear terminals, the cabinet is compact enough to sit on a shelf, a desktop, or a dedicated speaker stand, which gives buyers more placement options than the larger Sandwich 150 and Sandwich 250 allow in the same room.

Who Is the LEAK Sandwich 100 Walnut Best Suited To?

The LEAK Sandwich 100 is the smallest model in LEAK's modern Sandwich range, sitting below the Sandwich 150 and Sandwich 250. It suits listeners whose rooms don't accommodate a larger standmount: smaller listening rooms, desktop systems, and second systems where the footprint or 7.86kg weight per cabinet of the bigger models would be impractical. Peter Comeau led its development; he co-founded Heybrook Hi-Fi in 1979, designing the HB1 and HB2 loudspeakers, and now leads acoustic design at LEAK. That pedigree gives buyers a speaker built on established design expertise rather than an unproven debut product.

How Does the Crossover Maintain Stereo Imaging Across the Room?

The Sandwich 100 is fitted with a crossover network set at 2.2kHz, developed through measurement and listening, and built from polypropylene capacitors, air-core inductors, and low-loss resistors. This component choice maintains accurate phase alignment between the tweeter and mid/bass driver, keeping the two in step across the frequency range they share. The practical benefit is a stable stereo image and a consistent tonal balance that hold together not just at a single central sweet spot but from off-centre listening positions too, so seating position in the room is less critical to getting a coherent soundstage.

What Is the Sandwich 100's Cabinet Made From?

The Sandwich 100's cabinet is built to minimise resonance, using internal bracing and acoustic damping to control panel vibration and internal reflections. Externally, it carries a premium walnut finish with aluminium trim, while the front baffle is finished in soft-touch black rather than walnut, setting the Sandwich 100 apart visually within the range. A removable, acoustically transparent cloth grille is included and forms part of the speaker's voicing rather than being purely cosmetic.

Where Does This Model Sit Within LEAK's Range?

The Sandwich 100 is positioned as the entry point into LEAK's modern Sandwich series, sharing the same Rohacell cone technology and general engineering approach as the Sandwich 150 and Sandwich 250. Buyers who want the scale of a larger cabinet, or have the room to accommodate one, are better served by the Sandwich 150 or 250. Buyers whose priority is fitting a genuine two-way standmount into a smaller room, on a desktop, or into a second system are the intended audience for the Sandwich 100.