Acoustic evolution from passive to active: A record of in-depth modification of Honda Crown Road equipped with a zero-point two-way system

The ultimate realm of car audio, in the final analysis, is the double ultimate test of modification technology and tuning art. Only by tempering these two to perfection can we turn decay into magic and create an exciting auditory surprise in the limited carriage space. An industry consensus is that all car audio products are essentially “semi-finished products”. As the sharp saying goes: “Three points of equipment, seven points of modification.” This accurately broke the overwhelming proportion of the later modification process and system adjustment in determining the success or failure of the final sound effect. Excellent equipment is gorgeous music score, and top-level modification and tuning is the master conductor who can interpret it into the soul.

What we became attached to this time was the top version of a Honda Crown Road. The owner had previously carried out a round of audio upgrades elsewhere, but the tuning effect after completion was only in the category of “reluctantly accepted”. After using it for more than two months, the keen listening sense that was “oppressed” by unsatisfactory sound for nearly three months finally couldn’t stand the desire for excellent sound quality anymore. He decided to break the compromise and realize the in-depth modification of the “stomach” (taste) that really reached the heart in one step. Based on the profound contrast brought by the last imperfect tuning experience, the car owner did not hesitate to give us his trust when choosing again-he knew that the real transformation requires finding a professional partner who can understand and realize his auditory pursuit.

The essence of a professional car audio system is by no means blindly piling up expensive equipment. On the contrary, it pursues well-defined and just right streamlining and synergy. Equipment must be like close friends who treat each other sincerely, be able to connect the preceding with the following, cooperate tacitly, and jointly serve the overall music reproduction. Based on this concept, we recommend the classic series two-way set of German Ground Zero for the core of the front sound field: the GZNT 22 SQ tweeter unit, which is delicately extended from high frequencies, and the GZNK 165 SQ mid-bass unit, which is solid and full from mid and low frequencies, are a perfect match. They are driven by the same door leader-Zero Point GZUA 4.150 SQ-PLUS four-channel power amplifier, which ensures the perfect match between power and control. The audio processing brain uses the Alpine 0850 S DSP processor that was previously modified by the owner and has good quality to achieve accurate digital frequency division and sound field calibration. The subwoofer part also retains the original mature scheme. It is particularly worth mentioning that in the selection of wires, car owners fully follow our professional advice and spare no expense: the core thread of signal transmission is the top speaker cable and signal cable of Barney brand; The high-level input port uses the Van den Hul speaker cable, which is famous for its mellow timbre. Car owners who know that they devote their efforts to wires are undoubtedly true “enthusiasts” who have the deepest love for real and pure music.

Below, we will fully present this system upgrade project aimed at “one-step” through detailed detailed pictures. First start with the professional installation of the speakers.

The zero-point tweeter unit is installed in situ in the tweeter of the original Honda Crown Road car. This position has been considered by the original factory acoustics and combined with the directional characteristics of the zero-point unit to easily build a sound field with a standard sense of height and depth without damaging the interior, and the positioning is accurate and natural.

The installation of core electronic equipment is centralized and regular. The Zero Point GZUA 4.150 SQ-PLUS four-channel power amplifier is placed together with the Alpine 0850 S DSP processor to facilitate signal connection and management. The terminals of all power cords, signal cords and speaker cords have been carefully processed to ensure minimal contact resistance, firm and reliable connections, and clear marking and insulation protection, reflecting the rigorous attitude of high-end installation.

When all the hardware is in place, the system enters the most critical and magical stage-professional tuning. With the help of precise measurement microphones, spectrum analyzers and professional tuning software, we measure and correct the frequency response, phase, time delay, etc. of each speaker in detail.

This process aims to eliminate the negative impact of the complex acoustic environment in the car, thoroughly stimulate the potential of the zero-point horn, smoothly connect the high, medium and low frequency bands, and firmly present the sound field image in front of the instrument panel, so that every piece of music can fill the whole carriage in the most infectious form and closest to the original intention of recording, truly satisfying the owner’s fever of pursuing the ultimate and eager to “reach the stomach in one step”.