Post by deano1974 on Aug 16, 2017 7:21:22 GMT 12
Dear all our Elac marketing specialist sent us an email last night as below
Dear all,
I recently sent to Andrew Jones quite few magazine reviewers questions and I thought it will be interesting also for you – in a case you will be questioned about Adantes
1)We can see the explanation on the web that the new fabric material was used for driver explanation.
What kind of material is this ?
Please inform me about its material's name, feature and obtained effect.
The tweeter is both a new material and a new shape of dome/surround. The material is a woven synthetic fabric with optimized damping applied. This provides for a very smooth low resonance response. The shape has been calculated to extend the bandwidth of the tweeter at both extremes, to give an extended high frequency response while the use of a large roll surround also extends the low frequency response to allow me to use a lower xover frequency of 2kHz.
2)The baffle is aluminum which is the feature of ADANTE series.
Please inform me the reason that aluminum was used and its aim.
And also, what is this aim for that is the design with the curve gently to the unit ?
We used aluminium for a number of reasons. Firstly it is very rigid, and the combination of a damping layer sandwiched between the aluminum baffle and the cabinet along with screwing the baffle tightly to the cabinet results on a stiffer yet better dumped cabinet resulting in fewer resonance.
Secondly both the curvature and the shape around the concentric provide for a better transition of the tweeter wavering to the baffle surface, reducing diffraction irregularities.
Thirdly brushed anodised aluminum provides a much better quality finish to the front of the speaker and in combination with the gloss finish or wood finish of the cabinet enhances the visual appeal of the statement, especially at this price point.
3)I'd like to know the characteristics and details of the Xover.
The xover is of considerable complexity, comprising of a mixture of 1st, 2nd and 3rd order electrical networks, all components being custom made for ELAC with around nineteen components being used. All inductors are air cored, and all capacitors in the MF and HF xover are film caps.
4)In using of "Actvie/Passive Driver", what kind of points which should be considred about the adjustment of Xover and
the selection of components and design?
The active/passive driver along with internal vents form a class of alignment called series tuned band pass or Interport-Coupled-cavity. Although fundamentally not new, having been around in some form since the early 1950's, it has rarely been well implemented in a passive system dye to lack of understanding and capability of optimisation. In particular, in this form of using an external passive radiator and optimized in conjunction with its passive xover network. It required a very complex optimisation to adjust simultaneously both the passive xover network, the driver parameters, the box volumes and inter Nalgene vent tuning, and the passive radiator to achieve the desired target response. Many prototypes and simulation runs were needed.
5)Please tell me the details in suspension part of the passive driver.
The speaker cabinet is a special design, so are any special idea also here in installation of passive driver?
Please send the picture or drawing which knows the inside structure.
For the system to work optimally, the passive radiator design us very different from that of a conventional passive radiator system. Conventionally the passive radiator is in parallel with the driver. Here it us in series. Therefore it must be made acoustically very light weight. This was a special challenge in both the diaphragm material and the mass of the surround and the suspension components. The passive had to be made larger than the active driver, but this had the benefit of making it easier to load the woofer into the interior of the cabinet!
Best regards
Dear all,
I recently sent to Andrew Jones quite few magazine reviewers questions and I thought it will be interesting also for you – in a case you will be questioned about Adantes
1)We can see the explanation on the web that the new fabric material was used for driver explanation.
What kind of material is this ?
Please inform me about its material's name, feature and obtained effect.
The tweeter is both a new material and a new shape of dome/surround. The material is a woven synthetic fabric with optimized damping applied. This provides for a very smooth low resonance response. The shape has been calculated to extend the bandwidth of the tweeter at both extremes, to give an extended high frequency response while the use of a large roll surround also extends the low frequency response to allow me to use a lower xover frequency of 2kHz.
2)The baffle is aluminum which is the feature of ADANTE series.
Please inform me the reason that aluminum was used and its aim.
And also, what is this aim for that is the design with the curve gently to the unit ?
We used aluminium for a number of reasons. Firstly it is very rigid, and the combination of a damping layer sandwiched between the aluminum baffle and the cabinet along with screwing the baffle tightly to the cabinet results on a stiffer yet better dumped cabinet resulting in fewer resonance.
Secondly both the curvature and the shape around the concentric provide for a better transition of the tweeter wavering to the baffle surface, reducing diffraction irregularities.
Thirdly brushed anodised aluminum provides a much better quality finish to the front of the speaker and in combination with the gloss finish or wood finish of the cabinet enhances the visual appeal of the statement, especially at this price point.
3)I'd like to know the characteristics and details of the Xover.
The xover is of considerable complexity, comprising of a mixture of 1st, 2nd and 3rd order electrical networks, all components being custom made for ELAC with around nineteen components being used. All inductors are air cored, and all capacitors in the MF and HF xover are film caps.
4)In using of "Actvie/Passive Driver", what kind of points which should be considred about the adjustment of Xover and
the selection of components and design?
The active/passive driver along with internal vents form a class of alignment called series tuned band pass or Interport-Coupled-cavity. Although fundamentally not new, having been around in some form since the early 1950's, it has rarely been well implemented in a passive system dye to lack of understanding and capability of optimisation. In particular, in this form of using an external passive radiator and optimized in conjunction with its passive xover network. It required a very complex optimisation to adjust simultaneously both the passive xover network, the driver parameters, the box volumes and inter Nalgene vent tuning, and the passive radiator to achieve the desired target response. Many prototypes and simulation runs were needed.
5)Please tell me the details in suspension part of the passive driver.
The speaker cabinet is a special design, so are any special idea also here in installation of passive driver?
Please send the picture or drawing which knows the inside structure.
For the system to work optimally, the passive radiator design us very different from that of a conventional passive radiator system. Conventionally the passive radiator is in parallel with the driver. Here it us in series. Therefore it must be made acoustically very light weight. This was a special challenge in both the diaphragm material and the mass of the surround and the suspension components. The passive had to be made larger than the active driver, but this had the benefit of making it easier to load the woofer into the interior of the cabinet!
Best regards
Manager & Product specialist at Rapallo AV & HI-FI
