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Coaxial Drive unit
In a coaxial drive unit you have a mid-hi driver inserted directly in the center of a bass driver. Several implementations of this technology has been seen in the past with passive and active tweeters, dual or triple driver structure, with really coincident sources or with tweeter simply mounted ahead of the woofer. We used the most complex, but the most performing system.
Our driver features a true compression unit for the highs whose magnet structure stays behind the woofer's one, the throat passes through the woofer central pole piece an then flares following the cone's exponential profile to get a perfect horn loading from about 1000Hz and up.
This is a rather complex system, particularly when dealing with big and powerful magnetic system such as ours, but it leads us to the highest results, with grat speed, accuracy and effficiency in a rather compact 'package'.
When you are playing with compression drivers an issue is always the coherence with the bass unit, particularly in the field of speed and transient response.
We needed a very fastly responding woofer. We got it by the use of a very stiff but light cone (23 grams) and a very powerful magnet that gave us a very high Force Factor ( BxL > 25 Txm) several times higher than that of other high end bass drivers today in use.
Transmission Line
We had two goals: extended bass response but no booms or resonances (i.e. no bass reflex), maximum articulation and speed.. all this from an 8 inch woofer.
Not easy... impossible task with all the canonical systems. So we re-thinked TQWT we have a 1/4 wavelength transmission line, still reasonably compact.
The counterpart is that a standard TQWT has a very irregular response whose harmonics extend far in the midrange and we could not accept neither of those limitation.
So we pushed away from the standard shape of the TQWT reducing the need for internal stuffing and so increasing the line efficiency while reducing midrange output and placed a second drive unit in order to smoothen the response and reinforce the lowest end.
Dimension, tapering and driver placements are very critical factors and have been achieved in years of simulations and measurements.
The result is a very fast and articulated bass range which pushes toward 35 Hz in room measurements.
Supertweeter
We strongly recommend the use of a true supertweeter with all our loudspeaker systems. That's because we built a pair of supertweeter output connections in the panel of each Cx8.
Please keep in mind that a supertweeeter DOES NOT extend or reinforce the perceived high frequency range. It MUST work in a range where we simply can not hear a pure frequency.
A supertweeter has the difficult task of reconstructing the harmonic contents of fundamental frequencies in the mid/high range and over, where traditional transducers fail to work due to pysical limitations.
We suggest the use of a pair of Murata Harmonic Enhancers with our Cx8.
We can provide a pair of selected and matched supertweeter with each pair of Cx8 we ship, equipped with their connection cable.
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