The ultimate solution for the ultimate sound quality: Highlander Bivii three-way system in-depth modification guide

The Highlander owner who came to carry out in-depth modification of the sound system this time is an audiophile who has extremely strict standards for sound quality performance and requires the ultimate details of the modification process. Car owners not only have high expectations and trust in Japan’s top audio brand Bewith, but also do in-depth homework and research on the brand’s history, technical characteristics and sound style before modification. The main listening preference of car owners is focused on popular vocals, and it is expected that the upgraded system can achieve the following core goals: the restoration of vocals must be highly realistic, and the singer’s voice characteristics and emotional details must be detailed; All kinds of detailed elements in music need to be rich and distinct; The overall musical atmosphere needs to be full and infectious, so that people can immerse themselves in it. So, can the top-level configuration modification scheme agreed by the owner and us, which we will introduce in detail below, meet or even exceed these high expectations of the owner?

System core configuration list:

1. Sound source host: Pioneer’s flagship DEH-P 99 RS (selected second-hand Japanese version), as the source of the system, provides high resolution and pure signals.

2. Digital audio processor: Bewith P&P-8 multi-channel DSP, responsible for active frequency division, time calibration and fine EQ adjustment of the entire system.

3. Front sound field speaker: The top three-way package of Biwei AM series is famous for its precise timbre and excellent dynamics.

4. Subwoofer system: An 8-inch high-performance subwoofer unit of the American DD (Digital Designs) brand, and a special complementary box with accurate acoustic calculations is tailored for it.

5. Front sound field power amplifier: Two Audioweapons top reference series four-channel power amplifiers are used to drive the six three-way channels of the front sound field in active split mode, providing abundant and fully controlled power.

6. Special power amplifier for subwoofer: American Rockford Fosgate R 500.1 DX high-power mono Class D power amplifier, specially equipped to drive DD subwoofer.

7. Full-system wires: The speaker wires are made of top-grade wires from Van den Hul in the Netherlands, and the signal transmission lines are made of Barney (brand name) high-purity shielded signal wires to ensure the ultimate purity and lowest loss of signal transmission.

The following is a physical photo of the core equipment used in this upgrade, giving a glance at the elegance of this top combination.

 

Key steps in sound field shaping: Biwei AM series three-way tweeter and midrange units, precise positioning and preliminary work of inverted formwork construction on the A-pillar. This step determines the width, height and accuracy of the future sound field.

Efficient teamwork and skillful modification skills saved customers a lot of valuable time in this task. Since the customer explicitly requested that all the modification work must be completed within one day (which usually takes three days of workload), our team successfully completed the high-intensity and high-standard modification work with rich experience, tacit cooperation and ultimate optimization of the process. The modification project was condensed and completed within one day without compromising on quality.

A real shot of the final effect after the A-pillar inverted mold modification is completed. The shape is smooth and the covering process is exquisite, which is integrated with the original car interior style while ensuring the best acoustic directivity.

Installation of Pioneer P 99 Head Unit. Based on our in-depth understanding of the structure of Highlander models, we have always modified the main unit in this best position, which is easy to operate, sight and reach.

After the main components of the system are installed in place, the overall layout and visual renderings reflect the clean, professional and concealed installation concept.

At the door panel, the installation details of the Biwei three-way mid-woofer unit. We have made a special mounting base for it and strictly sealed it to improve its low-frequency performance.

The installation process of American DD eight-inch subwoofer and its custom-made complementary box. The box is tailored according to the trunk space, making full use of every inch of space.

The inverted hole (air outlet hole) of the box is not randomly opened, and its diameter, length and internal pipe structure are calculated according to professional acoustic data. With scientific data as the support, we can ensure that the bass effect is evidence-based and achieve the expected balance of diving depth, speed and volume.

The overall rendering of the subwoofer system after installation in the trunk not only ensures the acoustic performance, but also maintains the practicality of the trunk to the greatest extent.

In order to ensure the stable power supply of the high-power audio system, the additional audio-specific battery is securely installed at the designated position on the right side of the engine compartment.

In order to ensure the performance and safety of the new system, we completely dismantled and replaced all the old lines left by the owner’s previous modification, and built a pure and standardized new power supply and signal transmission network from scratch.

Installation location of the core processor and some power amplifiers: Biwei P&P-8 DSP is integrated with one of the Aiwei four-channel power amplifiers, and is hidden and installed under the bottom of the passenger seat.

Another Aiwei four-channel power amplifier is installed at the bottom of the main driver’s seat, which is mainly responsible for driving the mid-bass unit of the front sound field and the rear sound field speakers to achieve weight balance and wiring optimization.

Close-up of the wiring details of the entire vehicle’s audio system. All wires follow the principle of “horizontal and vertical, hidden fixation”, and use professional wiring harness fixation and protection materials to ensure the safety and reliability of long-term use.

The main safety base of the independent power supply circuit of the entire audio system is installed in an easy-to-repair position near the original car battery, which is the core guarantee of the entire set of electricity safety.