Engineered with the flexibility to perform anywhere in a room, even behind furniture.
The Acousta Quarter Wave proves that high fidelity need not command attention to be exceptional. Its ingenious rear-horn design produces clean, articulate bass with signature Lowther clarity, even when positioned behind furniture or discreetly in a corner. Handmade in Great Britain and finished in bespoke veneers carefully matched to each living space, it is as beautiful as fine furniture yet unassuming in its presence.
At its heart lies the PM7A Philharmonic, renowned for warmth, speed and natural detail. Together, cabinet and instrument create a performance that rivals, and often surpasses, systems many times its size. Every pair carries a 10-year warranty and the assurance of a lifetime of listening pleasure.
Bespoke premium matched veneer
Rear-loaded quarter-wave Voigt horn
8"
PM7A Sinfonia
DX2, DX3, DX4, PM6C, PM6A
98ā105 dB (room dependent, typically >100 dB system efficiency)
8 ohm nominal
35Hz ā 20kHz
830mm Ć 250mm Ć 480mm
27kg
Every Quarter Wave is handmade to order in our Northampton workshop. Each piece is built with care from start to finish by British craftsmen.
We use high-grade Baltic birch plywood for strength and tonal purity. Every panel is cut, shaped and joined by hand for perfect alignment.
You can choose from a range of real wood and specialist veneers. Each pair is book-matched to create a natural flow of grain that suits your space.
The drive units, including the PM7A Philharmonic, are assembled in our Norfolk atelier. Every part is crafted to the same standard as the world's finest instruments.
Each cone is hand-treated, air-dried and cured in natural sunlight. This gives every Lowther its unmistakably natural tone.
From wood to wire, every element is made to last for generations. A Lowther is not a product but an instrument that grows more beautiful with time.
Every cut, every joint, every finish is completed by hand. Our craftsmen bring decades of experience to each speaker, ensuring uncompromising quality.
Tall, elegant, and understated, the Acousta Quarter Wave blends seamlessly into your environment while delivering the immersive, lifelike sound for which Lowther is renowned. Whether placed proudly in view or tucked subtly into the room's design, it fills the space with warmth, speed and precision - a true marriage of sound and craftsmanship.
The Quarter Wave is designed around the PM7A Philharmonic driver, renowned for its warmth, speed, and natural detail. This driver delivers exceptional clarity across the frequency range, making every note feel immediate and alive.
Utilizing a rear-loaded quarter-wave Voigt horn design, the Quarter Wave produces clean, articulate bass with signature Lowther clarity. The horn loading allows placement flexibility, even behind furniture, without compromising sound quality.
Engineered to perform anywhere in the room, the Quarter Wave adapts to your space without dominating it. Its compact footprint and flexible placement make it the most versatile horn speaker we offer, perfect for modern living spaces.
Real experiences from Quarter Wave owners around the world
"They make my small room sound bigger, like the walls just disappear."
"I still can't work out how they reach that deep in the bass and stay so clear."
"Every time I sit down I end up listening for hours without realising."
"Voices sound so real it feels like the singer is right in front of me."
"They don't shout or show off, they just let the music breathe."
"I've never heard guitars sound this natural, every string has life."
"It's hard to believe this much sound comes from a single driver."
"They fill the room with warmth but the detail is still razor sharp."
"I thought I knew these records until I played them through the Acoustas."
"They make me want to listen to everything all over again."
"These speakers continue to produce witchcraft. How do they get so low in bass and also keep that sweet mid and highs?"
Discover the stories, craftsmanship, and passion behind Lowther through our video series.
Episode 1
Episode 2
Episode 3
Frequently asked
The Quarter Wave is designed for Small to medium rooms. Place near a wall with breathing space behind and to the sides; adaptable to varied rooms.
Place near a wall with breathing space behind and to the sides; adaptable to varied rooms.
The Quarter Wave is designed for 8" Lowther drivers. Recommended: PM7A Sinfonia. Alternative options include: DX2, DX3, DX4, PM6C, PM6A.
The Quarter Wave has a frequency response of 35Hz ā 20kHz, a sensitivity of 98ā105 dB (room dependent, typically >100 dB system efficiency), a nominal impedance of 8 ohm nominal. It is a handcrafted, made-to-order Lowther loudspeaker. Full specifications and options are confirmed at the time of order.
Yes. Lowther full-range drive units have a genuine break-in period during which the diaphragm suspension relaxes and the sound opens up and smooths out. It is normal for a Quarter Wave to keep subtly improving well beyond 1,000 hours of playing - this is a characteristic of the design, not a fault.
The Quarter Wave is handcrafted to order, with pricing from Premium. Because finishes and drive-unit options are configurable, final pricing is confirmed on enquiry. To request a price or place an order, contact Lowther at hello@lowtherloudspeakers.com or use the enquiry options on this page.
