Brise Audio FUGAKU - Ultimatives Tragbares Audio-System
Brise Audio FUGAKU - Ultimatives Tragbares Audio-System
Brise Audio FUGAKU - Ultimatives Tragbares Audio-System
Brise Audio FUGAKU - Ultimatives Tragbares Audio-System

Brise Audio FUGAKU - Ultimatives Tragbares Audio-System

CHF 14,999.00

Available for pre-order now. Delivery time approx. 3 months. 
Each Fugaku is individually handcrafted in Japan.






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  • Pure titanium case with PVD coating
  • Ear suspension structure for increased wearing stability
  • 5-way configuration with 8 drivers
  • Ultra high frequency: MEMS speaker x1
  • High frequency: BA driver x2
  • Midrange: BA driver x2
  • Low-midrange: BA driver x1
  • Low frequency: Φ8mm dynamic driver x2
  • Wideband frequency response over 100kHz 
  • Multi-amplifier connector with original 7-pin connector 
  • Consolidation of the crossover on the amplifier side

Dedicated portable amplifier

  • Two-story structure consisting of 4-layer board (power supply) + 8-layer board (amplifier)
  • Electronic volume MUSES72323 
  • Active crossover with a total of 10 channels left and right
  • Power amplifier circuit with a total of 12 channels left
    and right 
  • Drive system BA & MEMS: Single-ended drive
  • Dynamic driver: Balanced drive cable
  • Original 16-core sterling silver cable
  • Specially developed, high-quality sound processing in Utimate quality



A video of the interview with FUGAKU, including the secret history of FUGAKU's development, was released by Fujiya Abic. April 23, 2024 This
is an interview video with two developers.


It is a Three-type hybrid driver and a fully analog multi-amp system.

The left side of the figure below is a simple example of the conventional method, and the one on the right is a simple example of FUGAKU's multi-amp method.

In the conventional method, the amplifier → passive filter → driver are in the order , while in the FUGAKU method the active filter → the amplifier → driver are in this order.

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In the traditional method, there is a band dividing circuit called a passive filter between the amplifier and the driver, and the amplifier cannot drive the driver directly, and the directness of the Sound is compromised.

In addition, passive filters must be made smaller to fit into the headphone housing, resulting in a simplified design.
As a result, it becomes difficult for the designer to achieve the ideal frequency response.

Because an amplifier drives multiple drivers, the more drivers you have, the lower the impedance and the higher the load on the amplifier , the more distorted it is, and there are several negative elements in terms of sound quality in exchange for versatility.

To overcome these problems, FUGAKU introduced a multi-amp system.
This is a method that has been around for a long time in the world of speakers.

This is the world's first multi-amplifier configuration of hybrid driver earphones and fully analog, where each driver is prepared by one for each band Amplifier is driven.

It is no longer necessary to install the filter in the headphone housing and it is possible to use an advanced active filter consisting of OPAMP.

This makes it possible , to put together a high-order steep filter, and it is possible to freely design the frequency response that most affects the sound quality. In addition, since there are a large number of high-quality parts with a large volume, such as: B. film capacitors can be used, it is possible to improve the quality of each component.

In addition, the driving force is high, and the sound can be realized with an unprecedented direct feeling because amplifier and Drivers are directly connected to each other. 

As the number of drivers increases, so does the number of amplifiers, so the load per amplifier is low and distortion is less likely.

The expected disadvantages of this method are the flip side of the advantages of the traditional method .

Because it requires a dedicated amplifier and dedicated multi-pin cable, versatility is reduced and costs increase, but we chose this method because we felt it had advantages in terms of sound quality by far predominate.

In the multi-amplifier speaker system, it is necessary to prepare a preamplifier, an active filter and several power amplifiers separately, but by using these in a single cabinet, FUGAKU offers the ultimate sound with a feeling of grandeur , which is equivalent to the combination of traditional player + portable amplifier.

Product concept

The "ultimate earbuds" that can only be made by Bliss Audio was the beginning of FUGAKU.

And the concept is that when we make it, we want to achieve the quality , which is what we want most, and we want to create a composition that is not tied to existing frameworks, with sound quality as the top priority.

When it comes to a unique configuration with an advantage in sound quality, came The idea of ​​bi-amplified driving with a dedicated portable amp first came to mind.

However, if we were able to develop everything in-house, we could do something better by changing the band splitting integrate into a portable amplifier, so we thought the FUGAKU multi-amp system was born.

FUGAKU classifies "quality" into three categories: "sound quality", "design" and "comfort", and so on To achieve all of this at a high level, we have developed various ways to use headphones, special portable amplifiers and dedicated cables.

As for the sound quality we strive for, FUGAKU's "expressing all the information of the source" is consistent.

The excellent physical characteristics of the optimal structural design through the appropriate use of multiple types of drivers and the Sound quality, directly driven by a high-performance band splitter circuit and multiple high-performance amplifiers, turned our common sense upside down and left a strong impression that we had never experienced before.

These earbuds are a high-level -Fusion of traditional drivers such as the dynamic headphone type and the balanced armature type and a new driver called MEMS speaker.

Since the active crossover in the dedicated Portable amplifier is integrated, there is no crossover in the headphone body, and each driver and amplifier are directly connected.

The 3D sound pipe, titanium shaft and gold-plated OFC ring integrated into the 3D printed driver unit holder , offer excellent physical properties as well as the optimal parameter setting of the active crossover, resulting in acoustic performance that blends smoothly across the entire band.

Based on years of experience in the design, development and manufacturing of custom and universal IEMs, we have created a housing shape that is comfortable to wear and soundproof.

By using the cable with the ground and ear hook type, the deviation of the rotation direction is suppressed and extremely high wearing stability is achieved, although it is a universal earphone.

A specially designed 7-pin cable is used to connect the cable. Although it is small and has few contacts, it has a design that harmonizes with the headphone housing and gives a feeling of unity.

Dedicated portable amplifier

This is a portable amplifier for FUGAKU that balances compactness and durability while giving top priority to sound quality.

Based on feedback from TSURANAGI, the differential line receiver and electronic Volume re-switched, the power amplifier refreshed and a new circuit introduced.

In order not to compromise comfort, the interior is designed in three dimensions to achieve the same size as TSURANAGI. 

The main board is a two-story structure with two parts, and the first floor is a four-layer board mainly for power supply circuits and control circuits, and the second floor is an eight-layer board with only analog circuit amplifiers.

From the motherboard to the input/output ports, it is wired with pure silver wire made of the same wire material as the dedicated cable.

A total of 10,000 μF or more capacitance capacitors are effectively placed in the power supply circuit, contributing to the sound quality low center of gravity. In order to thoroughly avoid interference between the circuits, up to 14 ultra-powerful linear power supply circuits are also implemented.

In order to transmit the signal of the dedicated cable power amplifier to each driver without loss, It is a 16-core cable with pure silver conductors that was developed exclusively for this system.

By using a newly developed, high-purity pure silver wire rod, it achieves high flexibility and user-friendliness as well as excellent sound quality despite its multi-core.

Based on the pure silver wire tuning method grown at SHIROGANE, we have a dedicated high-quality one Ultimate quality sound processing applied.

Beautiful appearance and high wearing stability

Based on the experience of developers who have been engaged in the production of custom IEMs and earphones for many years, the headphone part of FUGAKU has created a case design that combines comfort and aesthetics with industrial designers.

The case material is pure titanium, which features high strength and moderate resonance with few metal-specific peculiarities, and a black PVD coating is applied to the surface to improve durability.

The three slots that Representing the three pillars of the cable, the amplifier and the earphones, reveal a gold-plated OFC ring that houses the dynamic driver and expresses the combination of black and gold, the company's corporate colors.

One of the main features of this earphone is that it has an ear hook, but if you use a so-called secure hanging cable over your ear, the earphone may shift in the direction of rotation during use due to the weight of the cable etc. or the cable can bite the base of the ear and become painful. To solve this problem, we chose an earhook type.

The cable is extended downwards and the downward force is supported by the TPE earhook to improve the mounting stability.

The earrings have built-in memory wires that can also be adjusted for bending.

As this is a multi-amplifier system, it is also necessary to connect each amplifier output and each driver independently, but there Due to the large number of pins and small size of 7 contacts, there was no connector that could harmonize with the design of the headphone case, we developed an original connector.

The cable attachment and detachment structure is designed so that it can be replaced in the event of separation, and in principle it is not assumed that the customer will replace it himself.

The included earphone is made of AZLA XELASTECII, which has an excellent fit and seal.

All 6 sizes come with 1 pair each. In order to experience FUGAKU's excellent low-frequency expression, it is very important that the left and right sides are tightly closed, so please find a suitable size.


Bandwidth allocation and choosing the right driver for the right task

Based on our experience in manufacturing and developing custom IEMs and universal IEMs, we have found that the best way to divide the band, i.e. H. Lowrange, Mid-Low-Range, Mid-High, High-Range, High-Range and Ultra-High-Frequency, optimal for the best band distribution in terms of assembly scale and easy creation of good properties.

For the lower range, it is equipped with a Φ8mm dynamic driver that uses a liquid crystal polymer membrane.

The two dynamic drivers are attached to each other in an OFC ring.

By using an opposite arrangement, it is possible to suppress unnecessary vibrations associated with the operation of the diaphragm, and by distributing the load with two drivers connected in series, low distortion, good response and a profound low frequency range realized.

The OFC ring is also gold plated to protect the surface and keep it smooth.

It is equipped with a total of 3 types of 5BA drivers: a single BA from Sonion in the mid and low range, a dual BA from Knowles in the mid range and one in the high range.

For ultra-high frequencies we used xMEMS side-port MEMS speakers.

The high responsiveness of the piezoelectric process and the broadband reproduction characteristics improve the atmosphere, delicacy and realism of the sound.

It uses the reverse piezoelectric effect, which deforms the piezoelectric film when voltage is applied, and as the piezoelectric Film itself made of silicon wafers vibrates and produces sound, it is smaller and more responsive than DD and BA, which drive the diaphragm by electromagnetic induction of the coil, and there is very little variation because there are no mechanical parts to assemble.


Layout that achieves the ideal frequency response

Each driver is attached to the holder of the screwdriver unit of a 3D printer (purple part) with an integrated sound channel and is integrated into the housing.

The sound emitted by the device holder becomes one on the shaft of the titanium housing synthesized to form the final sound.

The design of the device holder and stem aligns the phase of each driver and resonates the sound to position the peak dip, creating a sound that is the Basic sound for creating a sound with an active crossover is.

It is one of the key components to achieve the three-dimensional sound of FUGAKU, and there has been a lot of trial and error.

Since MEMS Speakers are small and thin, it is easy to secure space for sound lines in other bands even when placed near the outlet, allowing for optimal routing.

The OFC rings that connect the two secure dynamic driver are also connected to the sound tube of the tubular low-pass filter structure of the device holder.

In addition, the sound-absorbing material is placed on the back of each dynamic screwdriver and on the inside of the arm-shaped protruding part to which the ear hangers are attached.

By absorbing and attenuating the sound emitted from the rear opening of the dynamic driver and the rear vent of some BA drivers and reverberating inside the cabinet, the sound re-enters and affects the operation of the diaphragm . This improves the clarity of the low frequencies.



Based on TSURANAGI this amplifier has been greatly developed by adding a crossover and checking the circuit.

The first improvement is that we introduced a low-pass filter in the first stage.

In TSURANAGI, the power amplifier also served as a low-pass filter in the last stage, but by bringing it to the first stage the overall noise is reduced.

Since there is no bandwidth limiter in the power amplifier, this also contributes to improved responsiveness when starting up headphones.

The one in this low pass filter The capacitor used is a special type called an Low pass filter switches, and all inputs to the low pass filter are balanced signals.

This structure is the same as that of TSURANAGI, but by using a very low resistance and low distortion semiconductor switch instead of a toggle switch We have added a function for automatic selection of input terminals along with a function for inserting and removing terminals.

Differential line receiver is also a new circuit different from TSURANAGI, and the Performance has been improved by dividing the single IC into two ICs.
As a result, the residual noise here is less than 1/5.

The electronic volume has also been developed continues to evolve and we have updated it to a new Japanese wireless MUSES72323.
This improves the air and freshness feeling required for high-end devices.

In addition, the volume has been halved from 0.5 dB steps to 0.25 dB steps, allowing for finer adjustment of the volume.

The buffer amplifier is an OPAMP with FET inputs, and the electronic volume minimizes the current output and minimizes the distortion, and the crossover has a large capacity capacitor, so it plays a role in fixed driving.

Power amplifier are configured differently than dynamic drivers or in a different manner.
In addition, a DC bias circuit is added to the power amplifier that drives the MEMS driver.

First of all, the power amplifier that drives the dynamic driver is a circuit that combines and drives a pure differential amplifier and a current feedback amplifier in the same configuration as TSURANAGI, while converting it into a balanced signal.

The plus α is that the components used have been revised to achieve a lower output impedance and improved drive performance.

In the power amplifiers other than the dynamic driver, a Voltage feedback amplifier used in a completely new circuit.
This is also intended to drive headphones and has excessively high power for headphones.

Although it is not shown in the figure is, a DC servo amplifier is also integrated with a power amplifier other than MEMS to eliminate AC coupling capacitors in FUGAKU.

The component limits of the DC servo amplifier have been checked and the feedback method to the power amplifier further simplified and reduced the number of components to low noise.

As shown in the power supply circuit block diagram above, we have developed an original low noise circuit based on a linear regulator for the DC bias -Circuit for MEMS based.


New 16-core pure silver wire developed exclusively for FUGAKU

The cable for connecting amplifier and earphones is a new wire, which is different from our silver wire cable SHIROGANE.

The material is the same, but the thickness of the wire per core is reduced, thereby it is a cable that can be bundled into 16 cores and has a sufficient total number of conductors while maintaining practicality.

The reason for the 16 core is so that the amplifier can be connected independently to the 5th core -Way earbud needs to be connected, and since the dynamic driver is symmetrical, there are 2 cores, 4 cores for BA and MEMS HOT and 2 cores for GND.

With a single GND there is no problem, however the 8 cores are more dimensionally stable than the 7 cores, and the GND of BA and MEMS are separated to the headphone port to avoid a feeling of cloudiness.

The sum of the above resulted in 8 cores on one side and 16 cores on the left and right sides.

In addition, the wiring in the earbuds is also made of pure silver stranded wire, and there was no wire that could be easily used as internal wiring with a conductor that meets our standards, so We have developed a new wire for FUGAKU.

We have prepared 6 masking colors so that it can be processed during assembly.

On the amplifier side, the main board and the terminal board are also wired with cables, but these too consist of the same wire as the 16-core cable and are unified with silver wire.

Using a large amount of silver wire was a challenge in the development of SHIROGANE, but not only the good sides of silver, but also The special features came into their own, so that the high-quality workmanship inside the amplifier and the high-quality workmanship of the 16-core cable are exclusively tailored to FUGAKU.

In cables, materials are used near the terminals and on the Branches placed to absorb and shield electromagnetic waves, static electricity generated during movement and vibrations.

We have several types of materials, and the final sound will vary depending on the order and where they are processed, adapted, and that is high-quality sound processing. In portable amplifiers, these materials are attached to electronic components.