Dynaudio Special Forty

40 Years of Acoustic Innovation in a Timeless Bookshelf Speaker

The Dynaudio Special Forty is a premium two-way passive bookshelf loudspeaker developed to celebrate Dynaudio's 40th anniversary. Combining classic Danish craftsmanship with advanced acoustic engineering, it brings together proprietary driver technologies, carefully optimised crossover design, and exceptional cabinet finishes for an engaging and refined listening experience.

Featuring a 28 mm Esotar Forty soft-dome tweeter and a 17 cm MSP (Magnesium Silicate Polymer) woofer, the Special Forty is engineered to reproduce music with detailed high frequencies, natural midrange reproduction, and controlled bass performance. Its carefully integrated driver design helps deliver a coherent and expressive soundstage across a wide range of musical genres.

Designed and engineered in Denmark, the Special Forty combines sophisticated acoustic technologies with distinctive high-gloss wood finishes, making it an elegant choice for dedicated stereo listening systems and premium home audio setups.

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Feature Highlights

• Premium two-way passive bookshelf loudspeaker celebrating Dynaudio's 40th anniversary.
• 28 mm Esotar Forty soft-dome tweeter for refined high-frequency reproduction and detailed musical presentation.
• 17 cm MSP woofer featuring an advanced hybrid magnet system and AirFlow Basket design.
• First-order crossover incorporating Phase Alignment and Impedance Alignment technologies.
• Rear-ported bass-reflex enclosure designed to extend low-frequency response.
• Premium high-gloss finishes that showcase distinctive wood-grain patterns.
• Designed and manufactured in Denmark.

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Key Features

• Esotar Forty Tweeter:
  The proprietary 28 mm soft-dome tweeter features a precision-coated diaphragm and an advanced airflow management system. Its optimised rear chamber and pressure-release design help reduce unwanted resonance and improve high-frequency refinement and detail.
• 17 cm MSP Woofer:
  Constructed from Magnesium Silicate Polymer, the woofer cone combines rigidity, damping, and dimensional stability for accurate sound reproduction. Its one-piece cone construction and carefully engineered suspension support controlled movement and natural midrange performance.
• Advanced Hybrid Magnet System:
  The woofer employs a hybrid magnet arrangement combining neodymium and ferrite magnets to optimise magnetic flux and voice-coil movement. This design helps reduce distortion and improve driver control.
• AirFlow Basket Design:
  The specially engineered driver basket improves airflow around the motor assembly while helping minimise internal reflections. Its rigid construction supports consistent driver operation and improved acoustic performance.
• First-Order Crossover:
  The carefully designed two-way crossover operates at 2,000 Hz and incorporates Phase Alignment and Impedance Alignment technologies. The design supports smooth integration between the tweeter and woofer for a coherent listening experience.
• Rear-Ported Bass-Reflex Enclosure:
  The rear-facing bass-reflex port extends low-frequency output from the compact cabinet. Speaker placement should allow adequate clearance from the rear wall to help achieve balanced bass response in the listening room.
• Premium High-Gloss Finishes:
  The Special Forty features distinctive cabinet finishes that highlight the wood-grain appearance and reflect Dynaudio's attention to craftsmanship. Available finishes depend on the production version and market.
• Danish Engineering and Craftsmanship:
  Designed and engineered at Dynaudio Labs in Denmark, the Special Forty combines the brand's established loudspeaker heritage with advanced acoustic technologies developed for high-fidelity listening.

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Technical Specifications

• Product Type:
  Passive Bookshelf Loudspeaker
• Speaker Design:
  Two-Way
• Tweeter:
  28 mm Esotar Forty Soft-Dome Tweeter
• Midrange / Woofer:
  17 cm MSP (Magnesium Silicate Polymer) Cone
• Frequency Response:
  41 Hz – 23 kHz (±3 dB)
• Sensitivity:
  86 dB (2.83 V / 1 m)
• Rated Impedance:
  6 Ohms
• IEC Long-Term Power Handling:
  200 W
• Crossover Frequency:
  2,000 Hz
• Crossover Topology:
  First-Order
• Enclosure Type:
  Bass-Reflex, Rear-Ported
• Dimensions (W × H × D):
  198 × 360 × 307 mm
• Dimensions with Grille (W × H × D):
  198 × 360 × 322 mm
• Weight:
  8.1 kg per speaker
• Country of Manufacture:
  Denmark
• Cabinet Finishes:
  Finish availability varies by production version and market. The original product datasheet lists Grey Birch High Gloss and Red Birch High Gloss, while Dynaudio's product page also describes Black Vine and Ebony Wave finishes.

• Download Product Datasheet (PDF)