Visualization of top-level acoustic engineering: Full case analysis of Porsche Cayenne equipped with Betway six-decoding sound system

In the vast world of car audio, fans may have heard many legends of top brands and the fame of various “big systems”. However, there are very few people who are really lucky enough to listen to and experience the ultimate experiencer brought by a set of “super systems” recognized by the industry and enough to reshape auditory cognition. The reason is that building such a system is not a simple pile of equipment, but a trio of financial resources, taste and technical strength. A solid economic foundation is the ticket to open the hall, but more importantly, we must find a professional modification agency with matching profound technical background, rich practical experience and extraordinary artistic understanding. Only in this way can the expensive hardware be truly “awakened”, and its timbre charm and musical soul can be completely released and interpreted, instead of just staying on the numbers of the specification sheet.

This time, we have faced the ultimate challenge-to reconstruct the all-round sound system of a new Porsche Cayenne. It is no exaggeration to describe the owner’s obsession with music as “haunted by dreams”. He is not only an avid music lover, but also a connoisseur with an almost paranoid pursuit of sound quality. Among many high-end brands, he has long been fond of Japan’s Bewith, a top brand famous for its ultimate electroacoustic technology, innovative material applications and almost demanding process standards. The Biwei system has a unique design for current requirements and extremely lightweight equipment. It can be called a work of art that integrates cutting-edge contemporary acoustic technology. The owner knows that such a sophisticated instrument must be in the hands of a “surgeon” who can understand its design philosophy and perfectly perform the installation and adjustment. As a local professional organization that has been deeply involved in the modification of the Biwei brand for many years, “Music Broadband” has finally won the full trust of this high-standard car owner with the accumulation of many successful and in-depth cases. After several rounds of in-depth technical exchanges and demand research and judgment, a dreamy flagship system solution of Biwei was finalized: it consists of 6 mono audio decoders, 6 independent power amplifiers, 6 precision speaker units and 6 exclusive power managers, forming a highly modular and completely independently driven super acoustic matrix, aiming at building an unprecedented high-fidelity music universe in Cayenne’s cabin.

 

System-wide configuration checklist:

Acoustic Core:

• Front soundstage tweeter: Biwei C-50 IIIF tweeter unit
• Front sound field mid-bass: Biwei C-130 IIIF mid-bass unit
• Subwoofer: Biwei C-180 III woofer unit

Electronic hub:

• Digital audio source: Biwei STATE MM-1 DR top 24 Bit/192 kHz pure digital player
• Signal processing: Biwei STATE A 6 R MONO six-channel mono decoder × 6
• Power amplification: Biwei P-1 R mono power amplifier × 6
• Power Management: Biwei V-50 R Power Manager × 6

System context and energy cornerstone:

• Signal transmission: Biwei ML Link dedicated signal cable × 6 sets
• Energy reserve: American Stinger high-performance audio battery
• Safety and sound tuning: Japan’s Furutech top fuse (optional)

Revolutionary design of sound source part
The starting point of the system is the Biwei STATE MM-1 DR player. It is not a CD player in the traditional sense, but a purely electronic reading device that abandons all mechanical moving parts. It uses linear PCM decoding to the studio mastering standard. In order to solve the violent vibration and electromagnetic interference in the vehicle environment, its fuselage is made of patented MAGNEOLA ultra-lightweight magnesium alloy casting, which can effectively suppress resonance and electromagnetic interference; The reading window is precisely laminated with 8 layers of German Schott optical glass to ensure the absolute accuracy of data reading. In addition, it integrates a high-fidelity ML-Link interface and takes into account the reversing image function, which is a perfect combination of aesthetics, acoustics and practicality.

The full Chinese graphical operation interface makes the management and song selection of massive music libraries clear at a glance, which is very humanized.

 

Cornerstone of Acoustic Engineering: Precision Reconstruction of Door Panel Box
One of the souls of the Biwei system lies in the unique “off-axis eccentric” acoustic design of its unit, which means that the sound is highly directional to minimize propagation loss and reflection distortion. The midtone unit, in particular, covers an astonishingly wide frequency band from 40 Hz to 1000 Hz. In order to give full play to this design advantage and provide an ideal working environment for the units, the official strictly stipulates that each unit must be installed in an independent box with accurately calculated fixed volume. This is not optional, but required. Therefore, the internal structure transformation of the door panel has become the basic project with the largest engineering quantity and the highest precision requirements in this modification.

Full record of door panel modification:

First, according to the official data and the actual space of the door panel, three-dimensional design is carried out. All box plates are precision cut at millimeter level by numerical control (CNC) machines, ensuring absolute accuracy in dimensions and angles of each plate.

After the box is assembled, the inside and outside are coated with multiple layers of professional-grade environmentally friendly waterproof and anti-corrosion coating, which forms a solid protective shell after curing to resist the humid environment inside the door.

The box panel has gone through multiple processes such as polishing, filling, and painting, and finally reaches a flat and mirror-like process level.

Precise positioning of tweeter unit
Biwei tweeter comes with an exquisite magnesium alloy special cabinet. Although its installation does not involve the production of complex cabinets, the fine-tuning of directivity is crucial, which is directly related to the height and depth of the sound field and the accuracy of the image.

Exquisite wireless remote control keeps all operations under control.

Trunk: A Symphony Orchestra Seat for Electronics
In order to give this huge set of electronic equipment an ideal, regular and well-dissipated place to live, the owner resolutely decided to abandon the spare tire. The flat trunk floor of the new Cayenne provides an excellent transformation basis for this. We have adopted a drillless and screwless fixing method to install the bottom base plate, which protects the original car structure to the maximum extent.

The overall layout is designed into two floors: 6 Biwei P-1 R power amplifiers and 6 V-50 R power managers are neatly arranged on the bottom floor; Six STATE A 6 R MONO decoders are installed on the upper layer. The middle layer cleverly opens up space to hide the installation of American Stinger batteries. The top surface is placed on the custom cabinet of Biwei C-180 III subwoofer.

All wire contacts are made of high-quality crimp terminals, and solder is strictly avoided to prevent high temperature from changing the crystal structure of the wire and affecting the signal transmission characteristics.

Wiring is another art. All cables are layered and routed in split beams according to signal strength and current magnitude, and properly fixed to minimize mutual interference.

The main power supply insurance uses Japanese Furukawa 150 A products to provide the first safety barrier for the entire system.

Stinger batteries are perfectly integrated into the mezzanine, which saves space and is easy to maintain.

The Biwei C-180 III subwoofer cabinet is exquisitely crafted and blends into the overall style.

The effect of all the electronic equipment installed is orderly, just like a miniature exhibition hall of precision instruments.

Finally, the original trunk cover is covered, leaving only the subwoofer cabinet elegantly revealed, which perfectly interprets “low-key luxury” and is highly consistent with the owner’s philosophy of life.

The Last Magic: Scientific Adjustment and Subjective Fine-tuning
The completion of hardware installation is only a “semi-finished product”. We use the SIEG professional tuning system officially designated by Biwei to precisely measure and calibrate this fully active frequency division system. Including level balance of each channel, frequency division point slope, phase alignment and frequency response correction for special acoustic environment in the vehicle.

The ultimate listening experience
When all parameters are perfect and the play button is pressed, the entire technical team is shocked by the acoustic scene in front of them. This is not simply “nice to hear”, but a “sense of reality” completely wrapped in music and immersed in it. The sound field is extremely open and deep, and the knot images of musical instruments and vocals have a sense of solidity and precise positioning at your fingertips. Each instrument is clear and independent, does not interfere with each other, but resonates harmoniously, as if a tacit chamber orchestra is playing in front of us. The emotional catharsis of human voice is full and direct, and the singer’s breath, pronunciation and emotional ups and downs are all seamless and infectious. The low frequency is deep and elastic, paving the way for a solid and steady musical foundation, but there is no procrastination and turbidity. This Betway super system finally achieved a perfect transformation from auditory enjoyment to touching the soul in the cabin of the Porsche Cayenne, truly defining what the ultimate form of a mobile concert hall is.