Audio T Verdict
The LEAK Sandwich 250 is an unapologetically large standmount speaker, combining classic furniture-grade styling with the scale, bass weight and room-filling confidence normally associated with a floorstander.
Its three-way design allows the substantial 280mm bass driver, dedicated midrange unit and textile-dome tweeter to concentrate on separate parts of the music. The result is a spacious, powerful and engaging presentation with far more low-frequency authority than most conventional standmount speakers.
This Audio T package includes the matching LEAK stands, which position the driver array at the intended listening height and complete the speaker’s distinctive appearance. Give them enough room, suitable amplification and a proper demonstration and they make a wonderfully characterful alternative to a modern slim floorstander.
LEAK Sandwich 250 Speakers with Matching Stands
The LEAK Sandwich 250 is a large three-way bass-reflex loudspeaker inspired by the original LEAK Sandwich speaker introduced in 1961.
It combines a 280mm aluminium and foam-core bass driver with a dedicated 108mm Sandwich midrange driver and a 30mm coated textile-dome tweeter.
The substantial Walnut real wood cabinet is supplied as a matched, handed pair, while this Audio T package also includes the purpose-designed LEAK Sandwich 250 stands.
This Package Includes
- One matched pair of LEAK Sandwich 250 speakers
- One matching pair of LEAK Sandwich 250 stands
- Walnut real wood veneer finish
- Traditional acoustically transparent grilles
- Rubber feet for the loudspeakers
You Will Also Need
- A suitable stereo amplifier
- Speaker cable for the left and right channels
- Enough floor space for the wide matching stands
- Careful positioning within the listening room
Three-Way Loudspeaker Design
The Sandwich 250 divides the musical signal between separate bass, midrange and treble drive units.
The 280mm driver concentrates on the lower frequencies, the 108mm driver handles the important vocal and instrumental midrange, and the 30mm dome tweeter reproduces the highest frequencies.
Crossover points at 470Hz and 3.1kHz allow each driver to operate within a more focused part of the frequency range, helping the speaker remain clear and composed when music becomes complex.
280mm Aluminium-Foamcore Sandwich Bass Driver
The large bass cone uses LEAK’s modern Aluminium-Foamcore Sandwich construction.
A structural foam core is bonded between stiff aluminium outer skins, creating a diaphragm designed to combine low moving mass with considerably greater rigidity than many conventional single-material cones.
The 280mm diameter provides substantial radiating area, allowing the Sandwich 250 to produce convincing weight and scale without asking the driver to make unnecessarily large movements.
LEAK specifies a frequency response reaching 42Hz within ±3dB, with bass extension down to 32Hz at -6dB.
Dedicated 108mm Midrange Driver
A separate 108mm Aluminium-Foamcore Sandwich driver reproduces the midrange between the bass unit and tweeter.
This allows voices, guitars, pianos and other instruments to be handled by a driver designed specifically for that part of the musical spectrum.
The midrange unit operates within its own 2.7-litre enclosure, isolating it from pressure generated by the much larger bass driver.
Separating these sections helps preserve clarity and stereo focus when the system is playing at more demanding levels.
30mm Coated Textile-Dome Tweeter
High frequencies are reproduced by a 30mm coated textile-dome tweeter.
Its damped rear chamber absorbs energy produced behind the dome and isolates the tweeter from pressure inside the main enclosure.
Lowering the tweeter’s fundamental resonance helps it integrate smoothly with the dedicated midrange driver around the 3.1kHz crossover point.
Matched and Handed Pair
The Sandwich 250 speakers are supplied as a matched pair with mirrored driver layouts.
One cabinet is intended for the left channel and the other for the right, allowing the offset midrange and treble units to form a symmetrical arrangement.
Positioning the handed pair correctly supports precise stereo imaging and a broad, organised soundstage.
Layered Cabinet Construction
The enclosure combines MDF and composite board in a layered structure, creating a second application of the Sandwich principle.
Internal bracing strengthens the cabinet and helps control unwanted panel vibration, including a front-to-rear brace identified by the visible countersunk fixing on the back.
Each speaker weighs 27.3kg, reflecting the substantial cabinet, large drive units and traditional furniture-grade construction.
Purpose-Designed Matching Stands
The Sandwich 250 is too large and wide for many conventional speaker stands, so LEAK developed a dedicated support specifically for the model.
Each stand measures 375mm high, 430mm wide and 362mm deep. Combined with the 655mm speaker cabinet, this produces an approximate overall height of 1030mm.
The stands position the tweeter and midrange driver at a suitable height while providing a wide and stable base beneath the substantial cabinet.
Suitable protection should be used where the stands meet wooden, tiled or other delicate floors.
Room Positioning
Begin with the speakers clear of the rear and side walls and positioned symmetrically around the main listening seat.
Moving them closer to the rear wall will normally increase bass weight, while bringing them further into the room may improve definition, openness and soundstage depth.
Their large bass drivers and generous cabinet volume mean the Sandwich 250 is best suited to a medium or larger room where it has enough space to breathe.
Avoid placing one speaker close to a corner while the other sits in open space, as this can create noticeably different bass responses between the channels.
Toe-In and Stereo Imaging
Begin with the speakers facing forwards or angled gently towards the main listening position.
Increasing toe-in may improve the focus of central vocals and instruments, while reducing the angle can produce a broader and more open presentation.
Both speakers should use the same angle and remain level and secure on their matching stands.
Amplifier Matching
LEAK recommends amplifiers rated between 25W and 250W per channel.
The Sandwich 250 has a sensitivity of 88.5dB, a nominal impedance of 6O and a minimum impedance of 4O.
It can therefore work with a broad range of amplifiers, but its scale and bass capability reward equipment with stable power delivery and good low-frequency control.
The
LEAK Stereo 130
falls within the recommended amplifier range and provides a visually matching option for sensible listening levels. More powerful amplification may be appropriate in a larger room or where greater dynamic headroom is required.
Single-Wire Speaker Connections
Each speaker uses one pair of terminals for a conventional single-wire connection.
Maintain correct polarity by connecting positive to positive and negative to negative at the amplifier and both speakers.
Switch the amplifier off before connecting or changing speaker cables and ensure that no loose strands can bridge the terminals.
Walnut Real Wood Veneer
The cabinets and matching stands are finished to complement LEAK’s classic Walnut electronics.
Natural variations in colour and grain should be expected from real wood veneer, making each pair subtly individual.
Aluminium trim and traditional grille cloth complete a design intended to look more like carefully made furniture than a conventional modern loudspeaker.
Sandwich 250 or Sandwich 150?
The
LEAK Sandwich 150
is the smaller two-way model, using a 170mm mid/bass driver and 30mm tweeter.
The Sandwich 250 adds a much larger bass driver, separate midrange unit, greater sensitivity and considerably more cabinet volume.
It delivers greater bass depth and scale, while the Sandwich 150 is easier to accommodate in a smaller room and offers more flexibility when choosing stands.
Key Features
- Large three-way bass-reflex loudspeakers
- Supplied as a matched and handed pair
- Matching LEAK Sandwich 250 stands included
- 280mm Aluminium-Foamcore Sandwich bass driver
- 108mm Aluminium-Foamcore Sandwich midrange driver
- Dedicated 2.7-litre midrange enclosure
- 30mm coated textile-dome tweeter
- Damped tweeter rear chamber
- 470Hz and 3.1kHz crossover frequencies
- Layered MDF and composite-board cabinet
- Intelligent internal bracing
- Handed, mirror-imaged driver arrangement
- 42Hz–26kHz frequency response
- 32Hz bass extension at -6dB
- 88.5dB sensitivity
- 6O nominal impedance
- 4O minimum impedance
- 25W–250W recommended amplifier range
- 112dB specified peak output
- Walnut real wood veneer
Frequently Asked Questions
Are the matching stands included?
Yes. This Audio T package includes the LEAK Sandwich 250 speakers and their matching purpose-designed stands.
Is the price for a pair?
Yes. The speakers are supplied as a matched and handed stereo pair.
Are the Sandwich 250 speakers active?
No. They are passive loudspeakers and require a separate stereo amplifier and speaker cable.
What is a Sandwich driver?
Its diaphragm uses a lightweight structural foam core bonded between stiff aluminium outer skins to combine low mass with high rigidity.
What does handed pair mean?
The speakers have mirrored driver arrangements, with one cabinet intended for the left channel and the other for the right.
Which amplifier should I use?
LEAK recommends an amplifier rated between 25W and 250W per channel. Room size, listening distance and preferred volume should also be considered.
How much floor space do they require?
Each matching stand measures 430mm wide and 362mm deep, before allowing additional space around the speakers for positioning.
Are they suitable for a small room?
Their size and bass capability make them better suited to medium and larger rooms. The Sandwich 150 is easier to accommodate in a smaller space.
Is the Walnut finish real wood?
Yes. The cabinets use Walnut real wood veneer, so natural variations in grain and colour should be expected.
Why Buy From Audio T?
- Experienced LEAK and loudspeaker specialists
- In-store demonstrations through participating branches
- Matching stands included within this package
- Amplifier and source-component matching
- Speaker cable and termination guidance
- Help positioning the handed speaker pair
- Professional delivery and installation options
- Ongoing system and setup support
Contact your local Audio T store
to arrange a demonstration or discuss suitable amplification for the LEAK Sandwich 250.