"What a refreshingly honest blog about listening to music through hi-fi. So happy to see views based upon the enjoyment of music rather than so-called sound 'quality'." - Peter Comeau, Director of Acoustic Design at Mission / Wharfedale

Saturday 21 September 2013

More Exakt Info

The basics of Exakt:

A new type of DSM that accepts analogue and digital inputs.  Analogue signals are converted to digital (yes, including the Sondek!).  The Exakt DSM translates the data into Exakt Link format and sends this to an Exakt engine which can be either inside an Exakt Tunebox or inside an Exakt active loudspeaker.  The Exakt engine knows which speaker it is inside so takes that signal from the Exakt link and then decodes it into the correct frequency bands for each drive unit inside the speaker.  Each frequency band is then fed to a dedicated DAC and power amp for each drive unit.  Volume is controlled by the Exakt DSM but applied by the Exakt engine in the Tunebox or speaker at the last point in the digital chain before it goes to the DACs.

The Exakt engine is capable of correcting for manufacturing variation in the speaker drive units, 0dB distortion frequency crossover filtering and, by delaying some of the signal, 0dB phase distortion too.  It can also be fed room dimensions during installation to compensate for the type of room modes (typically heard as bass boom) expected for that size of room.

Signal  Exakt DSM to Exakt speakers is along cat5 using proprietary Exakt link protocols. Its not ethernet.  Lossless, guaranteed delivery and ultra accurate clock sync:
CD12 jitter 41ps
KDSM jitter 11ps
Exakt jitter 6.3ps 

Individual clocks in the Exakt engines. 1.8 nano seconds clock sync accuracy. This is equivalent to getting both speakers located to within 1/100th thickness of sheet of paper distance from the listening position.


Klimax Exakt DSM has analogue, digital and ethernet inputs. Only ethernet RJ45 style outputs. Cat5e cables to speakers which carry proprietary Exakt Link signals.  There is no concept of left / right channels for Exakt Link outputs - there are just multiple outputs to enable connections to multiple speakers.

Speakers have an Exakt engine inside (to decode its signal from the Exakt Link and to filter the signal into individual frequency bands) which then feed to a DAC and amp dedicated to each drive unit.

Pricing At Launch (from a dealer conversation and updated during the week after the launch through Linn forum posts by Linn employees, not officially provided by a Linn presentation nor on their website at time of writing):

£ 50k for KEDSM and a pair of 350 Exakt speakers
KEDSM and upgrade to existing 350 speakers £25k
A KEDSM and 2 x Exakt Tuneboxes will be £26k for owners of Keltiks or Komris
No official word on the cost of a KEDSM on its own at the moment, but word from Linn employees on the Linn forum that it will be "substantially less than the current KDSM" - so that means under £13k then

Klimax Exakt DSM

Exakt will be available in stand alone version for older speakers as an Exakt Tunebox which will contain an Exakt engine and 6 channels of DACs. Komri and Keltik for certain in November.  Other Linn speakers to come, but no schedule released at this point.

Possibility of Akurate and Majik versions later, but no definitive statements yet.

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