Tuned triangular line leading to a vent located on the front of the cabinet allowing a positioning close to the rear wall (40 cm minimum). Absence of internal parallel walls reducing the formation of standing waves and allowing the use of a minimum of absorbent material.
Tweeter installed in an insulated volume guaranteeing a total inertia and avoiding any mechanical-acoustic intermodulation with the woofer.
Cabinetry in 19 mm MDF assembled under press. Rounded vertical edges on the front avoiding edge effects, wide fillet on the top rear horizontal edge in line with the style of the current range.
Adhesive felt surrounding the loudspeakers to minimize early signal reflections on the cabinet and thus ensure better directivity control.

2 ½ ways,
6 – 12/12 dB/octave. Cut-off frequencies at 300 and 2800 Hz. Carefully selected audiophile quality components.

BOOMER/MEDIUM :
All new 13 cm manufactured under JMR specifications derived from the one used for the EUTERPE and the BLISS Jubilé. It uses a long fiber paper cone. The back of this optimized profile cone receives an absorbent treatment that improves its internal damping while retaining the universally recognized tonal qualities of the paper. It has a 30 mm coil on a ventilated aluminium support giving it a good power handling and a powerful and fast bass. Its core uses a copper ring to linearize its impedance and significantly reduce its harmonic distortion rate. Its rubber suspension receives an absorbent treatment on a portion of its profile in connection with the cone to improve its behavior in the full medium. It has an aluminum bowl whose profile perfectly clears the back of the cone. His speeder is ventilated.

TWEETER :
Textile dome tweeter using a 25 mm coil and a neodymium magnet in a small chamber tuned for a low resonance frequency of 650 Hz. It has a very wide and particularly linear response curve, and its directionality is not very pronounced and very progressive off axis. It has an injected ABS front panel with a pavilion profile for better performance and optimal directivity. This tweeter offers a very nice dynamic range and a lot of detail without dryness or harshness, qualities that are essential to meet the musical specifications of a JMR speaker.

Thanks to a very low directivity, you can enjoy LUNNA without a complex set-up within its environment. This great quality means that you don’t need to converge the two speakers to the ideal listening point to get the most out of its performance. The LUNNAs can be pinched very slightly in order to make the most of the system’s phase.

The spacing will be determined experimentally. In theory, the ideal distance is about 2 m from axis to axis, but this distance can be reduced or increased depending on the acoustic conditions and the dimensions of the listening room. To achieve a deep, well-built stereo image, make sure that the speakers are at least 40 cm away from the side and rear walls.
These loudspeakers are supplied with chrome-plated steel decoupling tips and tailpieces. The inserts on the cabinetry are in M6.

This system has been developed for home use, in no case it can be used for public or private sound system.
Any incident resulting from such use is not covered by our warranty.

Tuned triangular line, no internal parallel walls, which reduces the formation of standing waves and allows the use of a minimum of absorber. The use of internal viscoelastic absorbers transforms vibration energy into heat without loss of micro-information.
Tweeter installed in an isolated volume guaranteeing a total inertia and avoiding any mechanical intermodulation with the woofer.
Mechanical tensioning of the boomer thanks to a stainless steel threaded rod (non-magnetic) passing through the cabinet from one side to the other, resting on the boomer head and on the bottom of the cabinet. The tension is adjusted with a high-precision torque wrench to ensure the same tightening torque. This axial mounting of the bass driver allows for tensioning of the cabinet walls and ensures evenly distributed mechanical forces between the loudspeaker basket and the supporting baffle, which dramatically improves the transient response of the system.

Cells at 12 dB/octave. Air coils with low ohmic resistance wound in 1.5 mm diameter pure copper cable ensuring a dynamic performance without settling. Silver-armored capacitors sorted in pairs with a tolerance of 1%.
Cut-off frequency 2800 Hz. Wiring “in the air” to reduce insertion loss and using our HP1132 silver cable. The whole filter is assembled on a specific anti-vibration support. It is positioned as far as possible from any magnetic and vibratory disturbance. WBT type terminal block accepting any type of connection (fork, banana or bare cable) on aluminum plate.

BOOMER/MEDIUM :
Produced under specifications, it is new in the range, it is a 170 mm long fiber paper cone with a Gaussian profile, treated on its inner side by an extremely effective absorbent material. Its impregnated fabric core cover has the particularity of being assembled on the back of the cone in order to avoid sticking on the surface of the cone and to minimize its over-tension at the end of the belt. It has a 28 mm coil on a ventilated aluminum support, its aluminum frame clears the back of the cone perfectly. Its speeder speeder is also ventilated to allow a better cooling of the coil and thus to lower significantly its distortion rate. It is equipped with a double magnet to increase the concentration of the magnetic flux on the coil. Its suspension is made of a rubber-foam compound and has a progressive profile to achieve a very good return force in the extreme bass while preserving the micro-displacements necessary for midrange reproduction.

TWEETER :
The latter is none other than the one proudly displayed by our CANTABILEJUBILE model. A 28 mm impregnated silk dome tweeter particularly powerful. Its directionality is naturally very low, which allowed us to stop using a phase piece. Its linearity is exemplary and its internal damping optimal. It is driven by a powerful neodymium magnet, its very low resonance frequency allows us a cut-off frequency at 2800 Hz in 12 dB/octave. It is fixed with a specific glue to a machined aluminum horn for a better mechanical reference and to further improve its directivity and efficiency.

Thanks to the low directivity, it is not necessary to converge the two speakers to the ideal listening point, but to pinch them very slightly in order to make the most of the system’s phase.

The spacing will be determined experimentally. In theory, it is ideal to have a distance of about 2 m from axis to axis, but this distance can be reduced. In order to obtain a deep and well-built stereophonic image, make sure that the speakers are at least 40 cm away from the side and rear walls.

The best results in spectral balance and musicality were obtained by using our HP1132 cable, the same one used for the internal connection of all system components.

This system has been developed for home use, in no case it can be used for public or private sound system.
Any incident resulting from such use is not covered by our warranty.

Load type: Tuned triangular line leading to a front noise vent.
Cabinetry in 19 mm MDF with rounded edges, assembled under press to guarantee a total inertia to the structure.
The axial fixing of the bass drivers allows the tensioning of the cabinet walls, and ensures uniformly distributed mechanical forces between the loudspeaker basket and the baffle support, which dramatically improves the transient response of the system.
The use of internal viscoelastic absorbers transforms the vibratory energy into heat, without loss of micro-information.

2 × 130 mm. Zamak bowl, flat and airy spider, ventilated double magnet, carbon/kevlar non-woven hypergraphic cone, anti-vortex ogive for the midrange, suspension with high return power and high damping for powerful and fast bass.
25 mm moving coil on kapton support.
Mechanical tensioning by means of a stainless steel threaded rod bolted to the center of the magnetic core and to the bottom of the cabinet.

All new 28 mm dome tweeter in impregnated silk, ensuring a very linear response and a real dynamic range of the highest order (fine dynamics reproduced with great accuracy and large level differences very well respected, without projections or hardness). Double neodymium magnet, non-ferrofluid air gap. Tuned rear chamber ensures a very low resonance frequency (700 Hz) and perfect transient damping. Front panel with machined aluminum bell mouth to ensure a perfectly stable mechanical reference for the ultra-light mobile crew. Very little directionality and very regular ensuring a very nice energy off axis. Very low distortion rate, typically less than 0.05% between 3 kHz and 25 kHz.

Turned solid beech head with a geometry that optimizes the polar coordinates of the loudspeaker, it rests on an oblong spacer for a three-point connection to the main cabinet to avoid any micro-displacement.

Optimized tweeter positioning in height and depth to ensure precise dynamic phasing at the connection with the bass/midrange at 3 kHz. The temporal response is thus exact, the fundamental and the harmonics being reconstituted in perfect time concordance. The accuracy of the timbres is thus perfectly respected, and their fluidity is remarkable.

Type of filtering: 2 ½ ways: 6 – 12 -12 dB / octave. First and second order.

Low pass 600 Hz at 6 dB/octave

Low pass at 3000 Hz at 12dB/octave no bass filtering. The two bass drivers work in parallel and in phase below 600 Hz.

The high pass filter at 3000 Hz at 12dB/octave.

RC circuit (capacitor resistor) in order to linearize the impedance curve of the speakers, and minimize the impedance variations seen by the amp on the whole spectrum.

Hand-assembled filter without printed circuit board, components are oriented and soldered with silver solder directly to each other to avoid any insertion loss. They are glued on a plate of anti-vibration material, and are placed as far as possible from any electromagnetic disturbance.
Components sorted by pair with a tolerance of 1%.

Silver armature capacitors with HP1132 silver/copper cable termination marking the winding direction of the silver foil. Self à air sur support ferrite à faible résistance ohmique utilisant un câble cuivre désoxygéné de forte section, pour un grave rapide et sans tassement de dynamique. Non-inductive ceramic resistors with high current carrying capacity.

All internal wiring is done by our HP1132 cable (crossover component connections, capacitor terminations and direct connection to the loudspeaker, soldered directly to the terminals); the HP 1132 cable is made of a large crystal silver/copper alloy. It has three layers of insulation, a first layer of Kapton coating and a second layer of wrapped Teflon before an outer sheath of polyamide. This top-of-the-range cable allows a very beautiful richness of the timbres, combined with a great transparency and a perfect linearity on the whole audible spectrum.

Thanks to a very low directivity, it is not necessary to converge the two speakers to the ideal listening point, pinching them very slightly in order to make the most of the system’s phase.

The spacing will be determined experimentally. It is ideal theory around 2.5 m from axis to axis, but this distance can be reduced. To achieve a deep, well-built stereo image, make sure the speakers are at least 50 cm away from the side and rear walls.

The best results in spectral balance and musicality were obtained by using our HP216B cable, the same one used for the internal connection of all system components.

This system has been developed for home use, it cannot be used for public or private sound systems.
Any incident resulting from such use is not covered by our warranty.

Tuned triangular line, front noise vent.
Medite of 19 mm. Rounded edges on the front avoiding edge effects. Its cabinetry is modernized with a large diameter fillet on the top rear edge overhanging vertical sharp edges
Pressed assembly guarantees a total inertia of the structure.
Its air-striction tweeter is partially detached and decoupled from the cabinet by means of a damping joint. The profile of the head hosting this tweeter has been reviewed and softened. The connection between this turned wood head and the cabinet that supports it is decoupled by a viscoelastic compound in order to avoid the transmission of vibratory energy to the tweeter.
The axial fixing of the boomers allows the tensioning of the walls of the cabinet and ensures
evenly distributed between the loudspeaker basket and the baffle support, which improves
dramatically the transient response of the system.
We also reviewed the overall stiffness of the cabinetry and experimentally arranged
numerous viscoelastic compound surfaces. This avoids as much as possible the use of absorbent foam in the cabinet, which is always detrimental to the good articulation of the sound message in the lower midrange and upper bass. The use of internal viscoelastic absorbent transforms the vibratory energy into heat without loss of micro information.
The underside of the enclosure in connection with the base is also covered with a damping bitumen seal to decouple the enclosure from its spiked base.
Decoupling by height-adjustable metal cones.

It uses two new 14 cm bass-midrange drivers using a new cone structure technology
Pressed carbon sandwich enclosing a liquid crystal fiber.
Its cones are said to be “finished” or pure cones with a Gaussian profile, they are not pierced by the 38 mm coil that drives them. Their suspension beads are made from a rubber/foam mixture and are treated on a portion of the surface in connection with the cone with a damping material. Their motor receives a copper ring allowing to linearize the impedance until the end of the band in the high medium. Their flat speeder is airy. Their ultra rigid salad bowl is made of Zamac.
Thanks to its long coil, the X-max of this speaker (its linear displacement capacity) is +/- 5mm which allows a pure piston work until the extreme low register with a very good power handling.

Type AMT or AST (aerostriction) extremely powerful and natural. This tweeter uses a particularly quiet and non-aggressive silicon crossover. Its frequency response is extremely
linear and its horizontal directivity is very weak. It offers a legibility and a fluidity of the treble quite exceptional with a very great dynamic reactivity without distortion and a very good power handling. Its aluminum roof is machined in the mass. It is partially covered with a very thin acoustic foam in order to control the first reflections around its diaphragm and thus to limit the phase accidents off axis.

2 ways 1/2
It has been completely revised and simplified to the maximum. The slopes of this filter are 6db/octave at 350 hz in low pass for the bottom speaker (the two speakers working together and in phase below this frequency and the top speaker is not filtered in the bass) and 12db at 2800 hz between the medium and the tweeter.
This filtering is housed in a separate cavity at the bottom of the enclosure and shielded with bitumen to avoid any
vibratory transmission to the filter components and minimizes microphonic effects and intermodulations.
The two bass/midrange and tweeter cells are separate and are themselves acoustically shielded from each other. The assembly of these cells is entirely handmade on plates of anti-vibration materials and are wired “in the air” (all components are oriented and soldered directly to each other without the use of printed circuit with a silver solder ROHS). It uses silver-armatured capacitors terminated by our HP1132 cable whose direction of winding is marked, the chokes of the bass cell are on a ferrite support using a copper cable with a large cross-sectional area for a very low ohmic resistance and a very low distortion rate. All components are sorted and matched with a tolerance of 1% to ensure a perfect match of electrical characteristics on the speaker pair.

Efficiency: 90 db/W/m 2.83 V

Thanks to a very low directivity, it is not necessary to converge both speakers to the ideal listening point, just pinch them very slightly in order to take full advantage of the system phase.
The spacing will be determined experimentally. In theory, it is ideal to have a distance of about 2 m from axis to axis, but this distance can be reduced. In order to obtain a deep and well-built stereophonic image, make sure that the speakers are at least 40 cm away from the side and rear walls.
The best results in spectral balance and musicality were obtained by using our HP1132 bi-wiring cable, the same one used for the internal connection of all system components.

This system has been developed for home use, in no case it can be used for public or private sound system.
Any incident resulting from such use is not covered by our warranty.

The proprietary acoustic load at our realizations has been rethought and optimized in its profile, but still remains a triangular line tuned in ¼ wave leading to a front vent at the foot of the speaker.
This new version of our triangular line allows us to use almost no absorbent in the line itself. Only the dividing wall is covered by a small amount of thin acoustic foam and a ring of honeycomb foam acts as an acoustic diode on the back of the speaker cones. There are no sorbents to impede the flow of air through the load. Thus, the signal propagation speed in the line is much faster and the group propagation time of the system is greatly improved. In order to better control the vibratory phenomena, we have lined a large part of the internal surfaces of the cabinet with bitumen and viscoelastic compound positioned in an experimental manner at strategic points.

The tweeter is housed in a piece of solid wood that has been turned partially and is decoupled from the upper surface of the cabinet by means of a bitumen seal.
The whole cabinet rests on a base which is decoupled by a viscoelastic compound joint and placed on adjustable spikes with counter spikes.

TWEETER :
AST type tweeter (aerostriction) :
It consists of a pleated diaphragm 25 mm wide by 60 mm high, whose silicone support is covered with a very thin film of extremely light avionics-type aluminum. This diaphragm is traversed by an aluminum greek and the whole is surrounded by two neodymium bars of very strong power. Its operating principle is the same as that of the Heil or AMT transformer, but it has the particularity of using a diaphragm that is perfectly devoid of its own resonance. Unlike AMTs using KAPTON for their diaphragm, this one is very smooth while being informative and fast. Unlike a conventional ribbon tweeter that pushes air in front of it, the aerostriction tweeter pinches the air between its folds and expels it with a very high velocity. The dynamics is thus much greater (on the large differences of level as on the very small nuances…).
It is not very fragile, has a very high power handling and a much lower distortion rate than the ribbon, especially at the end of the band, where its displacements are the most important. It can thus be used much lower in frequency than a ribbon while using a less steep filtering slope. Moreover, its impedance curve is perfectly straight and it does not have a marked resonance frequency. Finally, its horizontal directivity is extremely low. As it works as a dipole, it is essential to associate a small closed load behind it which must be tuned experimentally and which is damped by a specific extremely airy felt.

BOOMER/MEDIUM :

These new 180mm HPs were developed in collaboration with a German company that only works on OEM products. We had already collaborated on the CANTABILEJUBILE tweeter which, for me, is probably the best textile dome tweeter I have heard.
It took almost a year and a half of work on several prototypes to finalize the study of this extremely powerful HP.
Its cone is made of 7 layers of carbon fiber and PEEK (Polyetheretherketone). This structure is particularly long and complex to achieve, because each layer must be produced with a very precise drying time to allow the whole to be as homogeneous as possible. This cone receives a plasma treatment on its external surface (granular) which avoids the formation of standing waves. This cone combines great lightness with good rigidity, but above all excellent internal damping. The cone of a loudspeaker is a clever combination of rigidity and internal damping capacity to avoid the resonances specific to the material used. On this particular point, we have achieved particularly satisfactory results.
This cone is driven by a 37 mm coil on two layers of 16 mm long on a ventilated fiberglass support, this support receives a surface treatment in order to dampen its own resonance frequency as much as possible. A ring of plasma-treated material is placed on the field of the coil support, again to prevent the coil support material from manifesting itself acoustically.
The air gap has a pure copper ring to linearize the impedance of the loudspeaker at the end of the band and to reduce its distortion by improving the concentration of the magnetic flux around the coil.
Its speeder is airy and has a progressive profile to allow a movement with a constant return force whatever the amplitude of its movement.
This boomer has a double ferrite magnet of 100 mm with double control ring and has a very strong magnetic field.
The NBR rubber suspensions have an optimized profile in terms of their curvature in order to obtain a progressive splitting and to maximize the efficiency of the return according to the distance of displacement of the mobile equipment.
Its bowl is made of aluminum and clears the back of the cone.
Its core is drilled, but receives a damping treatment consisting of several disks of oriented microphonic felt.
A fabric dome impregnated with a specific treatment on its inner side covers the coil and is glued to the cone with a latex-based adhesive.
These loudspeakers are tensioned as usual, thanks to stainless steel threaded rods that come to push the breech of the speaker and are tensioned on the back wall of the cabinet. This principle brings the mechanical reference of the loudspeaker to the back of the cabinet and ensures a better distribution of mechanical stress on the front of the cabinet. It improves the transient operation of the HP by stabilizing its mechanical reference. This results in a midrange that is free of all distortions related to the micro-displacement of the speaker motor and a much faster and better damped impulse response.

It has been the subject of much attention and a very long period of optimization. During 6 months, I compared and tried different filter configurations, but also different types and brands of components in order to retain only the best. These components are extremely qualitative and therefore particularly expensive. These tests were carried out with the measurement of course, but also and especially with the listening in order to select those which, beyond what could show the work of laboratory, showed themselves the most powerful with the listening.
As usual, I wanted to reduce the number of these components as much as possible to obtain a speaker that is easy to power. No resonant circuit or plug circuit. Only the components necessary for the realization of the 6/12/12 dB/octave filtering are used.
This is a 2.5-way configuration, with the two bass-midrange drivers working in tandem and in phase below 400 Hz, where the bass driver is connected in 6 dB/octave. The top speaker is dedicated to the mid/bass and is connected at 3500 hz with the tweeter and is not filtered in the bass.
This filter consists of two separate cells, oriented and separated from each other to avoid intermodulation of components.
We use silver armature capacitors with HP1132 (silver/copper) cable termination. The winding orientation is marked and they are specific to our use (manufactured under specifications by a French company S.C.R).
The chokes are made of large pure copper strips, wound around a solid wood mandrel and encased in wax to prevent unwanted radiation and intermodulation. These chokes have the particularity to offer an extremely low distortion rate, a very low internal resistance and very high power handling capacities. This translates into a very full, articulate bass with great density, substance and dynamics. They are used both on the bass, but also for the connection of the medium with the tweeter.
They are oriented in relation to each other to avoid unwanted radiation.
The resistors for the equalization of the tweeter level are of very high quality. They are wound and have the particularity of being surrounded by a copper tube connected to the ground of the system (they have three wires, input, output and ground and must be oriented in the direction of signal flow). This copper tube acts as a shield (Faraday cage) and eliminates all electromagnetic disturbances around the component which are evacuated by the system ground, but also acts as an excellent heat sink. Thus, the distortion rate of this resistor is particularly low. At large level differences, conventional resistors tend to get very hot, which results in distortion. With these resistors, the treble is very transparent (evacuation of the micro discharges) and extremely dynamic with a sensation of astonishing naturalness, leaving room for all the micro information essential to a really musical listening. The harmonic gradation is much more logical and devoid of “slag”, the treble is matt, fine, without persistence or undesirable granulosity effect.
As usual, all filters are made by hand, without using a printed circuit board, the components are soldered directly to each other using ROHS silver solder and are fixed with a flexible glue on forex plates that further isolate the components from vibrations.
The two cells are arranged as far as possible from the magnetic radiation of the loudspeakers and are themselves acoustically shielded with compound and foam.
All the internal wiring is done with our HP1132 cable, which has a doubled section for the midrange and bass.
Chaque composant est mesuré et trié par paire avec une tolérance de 1%. Thus the crossover components have perfectly identical values on the pair of speakers
The connection of the speakers is entrusted to Mundorf terminals in pure copper of very high quality and selected for their exemplary musicality. They are fixed on a bituminous aluminum plate. The connection of the cables to the passive crossover is made without soldering by means of pure copper grommets, also of Mundorf origin.

Thanks to a very low directivity, it is not necessary to converge the two speakers to the ideal listening point, pinching them very slightly in order to make the most of the system’s phase.

The spacing will be determined experimentally. It is ideal theory around 3 m from axis to axis, but this distance can be reduced. To achieve a deep, well-built stereo image, make sure that the speakers are at least 80 cm away from the side and rear walls.

The best results in spectral balance and musicality were obtained by using our HP216B cable, the same one used for the internal connection of all system components.

This system has been developed for home use, in no case it can be used for public or private sound system.
Any incident resulting from such use is not covered by our warranty.

• Device limiting the phenomena of solidian transmission of the vibratory energy thanks to the use of materials of different density (MDF-Aluminium). A 3 mm thick aluminum sheet encloses three sides of the cabinet to better concentrate the energy towards the interior of the acoustic load.
• Loading principle: Tuned triangular line in ¼ wave leading to a front vent located at the bottom of the cabinet. This proprietary loading principle allows us to use almost no sorbent that would slow down the air flow in the different cavities. Thus, the signal propagation speed is much faster and the group propagation time of the system is greatly improved. In order to better control the vibratory phenomena, we have lined a large part of the internal surfaces of the cabinet with bitumen and viscoelastic compound positioned in an experimental manner at strategic points.
• Complete mechanical decoupling of the enclosure base, allowing the use of Teflon pads as interfaces with the floor (no decoupling spikes). The speaker is as if suspended. Thus, the vibratory energy is transformed into heat within the polymer and is hardly transmitted to the ground. The result is a perfectly controlled bass that integrates with the musical message in a much more natural way since it never vibrates the floor material. The other advantage is to preserve the middle part of the signal without the drying phenomena often observed when using rigid decoupling tips.

AST type tweeter (aerostriction) :
It consists of a pleated diaphragm 25 mm wide by 60 mm high, whose silicone support is covered with a very thin film of extremely light avionics-type aluminum. This diaphragm is traversed by an aluminum greek and the whole is surrounded by two neodymium bars of very strong power. Its operating principle is the same as that of the Heil or AMT transformer, but it has the particularity of using a diaphragm that is perfectly devoid of its own resonance. Contrary to a classic ribbon tweeter which pushes the air in front of it, the aerostriction tweeter pinches the air between its folds and expels it with a very high velocity, the dynamics is thus much greater (on the big gaps of level as on the very small nuances).

Medium/boomer 180 mm
Its cone is made of 7 layers of carbon fiber and PEEK (Polyetheretherketone). This cone receives a plasma treatment on its external surface (granular) which avoids the formation of surface standing waves. This cone combines great lightness with good rigidity, but above all excellent internal damping.
This cone is driven by a 37 mm coil on two 16 mm long layers on a ventilated fiberglass support.
The air gap has a pure copper ring to linearize the impedance of the loudspeaker at the end of the band and to reduce its distortion by improving the concentration of the magnetic flux around the coil.
Its speeder is airy and has a progressive profile to allow a movement with a constant return force whatever the amplitude of its movement.
The NBR rubber suspensions have an optimized profile in terms of their curvature in order to obtain a progressive splitting and to maximize the efficiency of the return according to the distance of displacement of the mobile equipment.
These loudspeakers are tensioned as usual, thanks to stainless steel threaded rods that come to push the breech of the speaker and are tensioned on the back wall of the cabinet. This principle brings the mechanical reference of the loudspeaker to the back of the cabinet and ensures a better distribution of mechanical stress on the front of the cabinet. It improves the transient operation of the HP by stabilizing its mechanical reference. This results in a midrange that is free of all distortions related to the micro-displacement of the speaker motor and a much faster and better damped impulse response.

• The passive filter :
It has been completely redesigned with different connection frequencies and the best components currently available on the market.
As usual, I wanted to reduce the number of these components as much as possible in order to obtain a speaker easy to feed.
No resonant circuit or plug circuit. Only the components necessary for the realization of the 6/12/12 dB/octave filtering are used.
This is a 2.5 way configuration, with the two bass-midrange speakers working in tandem and in phase below 200 hz or the bass speaker is connected in 6db/octave. The top speaker is dedicated to the mid/bass and is connected at 2200 hz with the tweeter and is not filtered in the bass.
This filter consists of two separate cells, oriented and separated from each other to avoid intermodulation of components.
The equalization resistors for the tweeter are of a very high quality, they are wound and have the particularity to be surrounded by a copper tube connected to the ground of the system. (They have three wires, input, output and ground and must be oriented in the direction of signal flow) the whole is then trapped in an inert resin. This copper tube acts as a shield (Faraday cage) and eliminates all electromagnetic disturbances around the component which are evacuated by the system ground, but also acts as an excellent heat sink. Thus, the distortion rate of this resistor is particularly low. A ground braid is then connected to the terminal block of the speaker on a fifth terminal which is then connected to the ground of the domestic electrical installation. This completely drains all electrostatic and electrical charge and cleans up the signal for a more relaxing and detailed listening experience.
As usual, all the filters are made by hand, without using a printed circuit. The components are soldered directly to each other using ROHS silver solder and are attached with a flexible adhesive to forex plates that further isolate the components from vibration.
The two cells are arranged as far as possible from the magnetic radiation of the loudspeakers and are themselves acoustically shielded with compound and foam.
All the internal wiring is done with a new cable reference that uses some elements of our HP1132 cable but in a slightly different configuration since it has a star structure. The silver-plated copper core has a large cross-section and is then surrounded by small cross-section strands, still in silver-plated copper.
Chaque composant est mesuré et trié par paire avec une tolérance de 1%. Thus the crossover components have perfectly identical values on the pair of speakers
The connection of the loudspeakers is entrusted to ETI terminals (the same as those used on VOCE Grande) which have been extensively compared and selected for their exemplary musicality. They are made of silver-plated tellurium copper of very low thickness providing an extremely low internal resistance. They are fixed on a bituminous aluminium plate

ORFÉOGRANDE gives off a lot of energy, which is why it is best suited to rooms of 30 m² or more. This being said, if the listening were to be done in a smaller room, it would be necessary to take care to keep a very reasonable listening level so as not to overstress the room.
A distance of 80 cm around it is recommended, this distance must apply to the side walls and especially to the back.
The distance between the axes of the enclosures should be about 3 m and can be increased to 4 m or more.
Since the directionality of the system is very low, it is not necessary to make the speakers converge completely towards the listening point. However, an angle of 5 to 15° depending on the distance will allow you to benefit even more from the very rigorous phase of the system.
ORFÉOGRANDE does not have a decoupling tip due to the design of its base. If your floor is uneven, you may need to insert adhesive felt pads under the bases to ensure that the speaker is stable.
Connecting the fifth terminal (ground): to take advantage of the grounding of the passive crossover at the level of the equalization resistors, you must connect the fifth terminal (gold) to the ground of your electrical installation (do not connect it to the ground of an amp). For this purpose, an ordinary cable (electric cable for example) will be sufficient, as no signal is carried by this terminal.