Dynaudio – Special Bristol Show

Dynaudio Special FortyDynaudio is back in the West Country for the 31st Bristol Show. Not only will this be the biggest Sound and Vision show, it looks like Dynaudio have something Special to bring.

Dynaudio regularly scoops the much coveted ‘best in show’ awards for its demonstrations. Needless to say then that the speaker maker has an enviable reputation to maintain.

Dynaudio at The Bristol Show

This year they will be exclusively demonstrating its Special Forty stereo speakers. These standmounts were lovingly created by the Danish company to mark its 40th anniversary.

The Special Forty is classic Dynaudio design.

Everything that you have come to expect from the brand is there. The craftsmanship, attention to detail and total love of authentic sound.

Dynaudio Special Forty

Dynaudio Special FortyThe Special Forty is a classic passive two-way design: the team in Dynaudio Labs studied the legendary techniques and technologies that make their speakers so celebrated. They then took them back to the drawing board. The result? The ultimate compact standmounter in its class as far as they are concerned.

Esotar Forty tweeter

Firstly, the Esotar Forty tweeter is exclusive to this speaker. It is based on the other Esotar tweeters but has a few new tricks.

Behind the diaphragm in the magnet is a new pressure conduit –a specially shaped vent that allows more space to the rear chamber. Also, it controls how the air moves from the back of the diaphragm into that space. There is more damping material and, in conjunction with the pressure conduit, it serves to reduce back-pressure on the rear of the tweeter diaphragm.

There’s an aero-coupled pressure-release outlet under the tweeter’s voice-coil. It equalises the pressure immediately under the voice-coil with that outside to reduce any air pockets that could stop the coil moving as it should. This reduces resonance and manifests itself in the form of a more detailed performance.

The Esotar Forty’s 28mm diaphragm is a classic Dynaudio soft-dome design, complete with the DSR (Dynaudio Secret Recipe) precision coating. This coating is applied in exactly the correct places and thicknesses to optimise high-frequency performance.

Furthermore, the unit is suspended in magnetic ferrofluid. This increases power-handling, improve the dome’s excursion and absorbs unwanted heat and excess energy. And that, in English, means a tighter, more controlled and more honest performance.

The Esotar Forty’s frequency response as even been increased; downwards. It can comfortably reproduce frequencies down to around 1000Hz –well into the midrange. The reasoning will become apparent in a bit.

Dynaudio’s best 17cm woofer

Dynaudio Special FortyThe Special Forty woofer is based on Dynaudio’s classic 17W75MSP model. This one has an
improved spider and specially optimised excursion-symmetry. I know, right?

They’ve stuck with their proprietary MSP (Magnesium Silicate Polymer) material. Additionally, the Special Forty’s driver is a one-piece design.

Additionally, the coil’s former is bonded directly to the back of the ring where the Balance Ribs sit –making the dome part of the playing surface.

This enables the woofer’s frequency response to be extended upwards. It can easily handle frequencies up to around 4000Hz. Are you getting it yet?

Seamless driver overlap

Finally, it’s time to pull it all together. That 3000Hz overlap between the tweeter and the woofer is crucial.

It means there’s no need for steep filters and complex circuitry to make the drivers mesh well together.

Because the Special Forty’s drivers perform alike in many areas (including frequency response,phase response, tonality, sound dispersion and on-and off-axis performance), they blend incredibly well.

That’s before any crossover magic happens.

Dynaudio first-order crossover

Dynaudio has used first-order crossovers for decades. The Special Forty has taken that classic design and ramped-up their unique Phase Alignment and Impedance Alignment technologies.

Specifically selected components handle the impedance optimisation and, because both drivers have extended frequency ranges for even better overlap and integration, their performance is impressive.

Where to hear the Special Forty

To the hear a Special Forty stereo pair, powered by Naim electronics, visit Dynaudio at Stand Foyer 2a on the Ground Floor.

Dynaudio Xeo 20Here you can also view the new Xeo 20 and Xeo 30 active wireless speakers – on public display in the UK for the first time.

Price and availability

The Special Forty is available now for £2,500.

It comes in two finishes: Grey Birch High Gloss and Red Birch High Gloss.

Technical specifications

  • Sensitivity 86dB (2.83V / 1m)
  • IEC power handling 200W
  • Impedance 6ohms
  • Frequency response (+/-3dB) 41Hz –23kHz
  • Box principle Bass-reflex rear ported
  • Crossover 2-way
  • Crossover frequency 2000Hz
  • Crossover topology 1st order
  • Woofer 17cm MSP cone
  • Tweeter 28mm Esotar Forty
  • Weight 8.1kg / 17.9lb
  • Dimensions (W x H x D) 198 x 360 x 307mm / 7.8 x 14.2 x 12.1in
  • Dimensions with feet/grille (W x H x D) 198 x 360 x 322mm / 7.8 x 14.2 x 12.7in