CUBE
THE original
ktmtüren
001
Cube conceives doors – as a system.
Reduced to the essentials, designed for maximum creative freedom. Cube embodies a minimalist design language – clear, understated and consistent. At its heart lies the interplay of all elements. Door, frame and wall merge into a single unit in which function and design are inextricably linked. Hinged, sliding or swing door solutions integrate seamlessly into the system – precisely coordinated and thought through down to the last detail. The result is not just a door, but a holistic concept. Surfaces, proportions and technology interlock to create a seamless architectural solution. Cube strikes a balance between minimalist aesthetics and intelligent system logic.
Flush with the surface
Flush with the wall or
Concealed
002
The consistent flush-fitting of door and frame forms the basis of Cube. Flush-mounted or virtually invisible installation solutions reinforce the minimalist design and allow the architecture to appear as a unified whole. A defining feature is the minimalist design: whilst conventional frames have up to ten edges, the Cube frame requires no more than six. The result is a calm, precise line. The smooth decorative lining, without protruding steps, the uniform edge finish and concealed door hinges blend seamlessly into the overall picture. The technology takes a back seat – and supports the clear, consistent architecture.
CUBE on the wall
flush | door - door frame
Versions:
standard and reverse
CUBE flush mounted
flush | door - door frame - wall
Versions:
standard and reverse
6 mm shadow gap
(aluminium / black / white)
Contur concealed
invisible door frame system
Versions:
standard and reverse
Door Frames
Systems
Traditional door frame on the wall
10 edges
CUBE on the wall
6 edges
CUBE flush mounted
2 edges
CONTUR – concealed
0 edges
CUBE
Collection
003
Cube begins with clarity
A smooth, white door with a flush frame – a logical introduction to the range. But the system goes further. Variants such as »Transparency« open up new dimensions of openness with generous glass panels and light-filled openings, whilst »Luxury« creates a subtle sense of opulence with clean, angular profiles.
CUBE | Base
CUBE | Base
CUBE | Lines
Lines 101
Lines 102
Lines 103
Lines 104
Lines 106
Lines 201
Lines 205
CUBE | Cut
Cut 40
Cut 50
Cut 60
CUBE | Luxury
Luxury | Lux 10
Luxury | Lux 20
CUBE | Transparency
Transparency | L 10
Transparency | L 30
Transparency | L 40
Transparency | L 60
Transparency | LC 40
Transparency | LC 50
Transparency | LC 60
CUBE | Vision
Vision | V10
Vision | V30
Vision | V40
CUBE | Luxury L
Luxury | Lux 10L
Luxury | Lux 20L
Behind
The Scenes
004
.
Juliane und Alexander v. Bülow
We – Brüchert + Kärner – stand for high-quality door solutions, design expertise and many years of experience. As a third-generation Hamburg-based company, we know what matters when it comes to the production and development of doors. Building on a long-standing, trusting partnership with bod’or KTM, we have been continuing to supply selected door systems since April 2025. This ensures that the high quality for which the brand is known on the market is maintained – complemented by our own experience, our commitment to excellent craftsmanship and our eye for good interior design. Please get in touch if you view doors as part of a holistic design concept. We look forward to discussing your project and working with you to create impressive spaces.
