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BL-25

BL-25 front viewCeramic cone drivers; specified for LindemannHigh class components
BL-25 front view
Ceramic cone drivers; specified for Lindemann
High class components

Lindemann Audio focused on consistently developing the highest level of quality for this made-in-Germany speaker. The most recent addition to the Birdland loudspeaker series, the BL-25, also features a driver custom-made for Lindemann. Together with this German-made ceramic cone drivers, individual crossover simulation (= Lindemann intelligent “minimum phase crossover“) is used on the driver. Along with the components, Lindemann also relies on housing “made in Germany”, with a multi-layer composite structure made of birch plywood, cork and “furniture” linoleum. This guarantees perfect sound properties at the same time as high inner damping.

Compact dimensions, with high efficiency and the ultimate in resolution, these speakers have what it takes to become an audio industry benchmark. No compromises have been accepted in pursuit of this ambitious goal, and only the best of today's available materials have been used in their construction. Completely handmade in Germany, Birdland speakers promise a totally new listening experience.

Latest generation ceramic cone drivers

Latest generation ceramic cone drivers

The latest generation of German-made ceramic cone drivers is used throughout. Extremely stiff, leight weight, solid ceramic cones give these drivers a potential for outstanding resolution, efficiency and life like performance. At the same time, however, these drivers present a great challenge to the speaker designer, since they are very unforgiving of errors in crossover or cabinet design.

Intelligent Minimum Phase Crossover

Intelligent Minimum Phase Crossover

The crossovers in the Birdland Series do not force the drivers to maintain a specific transfer function such as »Butterworth« or »Bessel«; instead, their slopes are derived from the »natural« transfer function of the drivers modified (by computer simulation) for minimum phase behaviour. This »Intelligent Minimum Phase Crossover« delivers perfect frequency- and time-domain performance by having just a single component in the signal path of the midrange driver. Unparalleled coherence and wide dispersion are the direct result.

Unique multilayer cabinet material

Unique multilayer cabinet material

We undertook a great deal of research to optimize the cabinet as a critical component of the speaker system. Many cabinet materials were tested for energy storage, resonance behaviour and self-damping. Conventional materials such as MDF, plywood, stone and aluminium were all found to be unsatisfactory in at least some of these aspects. We therefore decided to look for a new combination of materials that would offer lightness, stiffness and good self-damping at the same time. The outcome is a unique multilayer composite made from plywood, cork and furniture linoleum. Because it does not store energy, the cabinet does not produce a delayed resonance »response«. As a result, the power of the amplifier is directed much more effectively towards making music rather than being partly absorbed by the cabinet materials. This leads to an impressively powerful, well defined and exceptionally balanced performance at lower midrange and bass frequencies.

More design highlights

  • Cryogenically treated WBT "nextgen®" terminals
  • German-made copper foil inductors from Mundorf
  • German-made neodymium tweeter with ceramic-coated magnesium dome
  • Handmade "Master Refererence" capacitors from the UK
  • Lindemann »Kind of Blue«, cryogenically treated, pure copper internal wiring
  • Controlled decoupling from the floor through stainless steel feet resting on ceramic balls and tonewood
  • Floor-vented resonator: plug-and-play performance, positioning not room-critical
  • 5 years warranty