I believe that there are still many friends who like music, and the comprehensive evaluation of BMW 5-series models is still a relatively balanced and good car! But no one is perfect, and the car is never finished. What I share with you today is a complete set of 16-horn Harman Catton sound system of 20 BMW 525Li models modified from the original factory. As everyone complained, the sound of the original car is really unsatisfactory, uninteresting, soft, and castrated by manufacturers, so the overall sound quality is not satisfactory. Haha!
Then there are all kinds of “homework, tutoring” to study how to improve the plan, which can be roughly divided into two schools, one is what DSP tuning amplifier and loudspeaker are installed in the audio store outside, and the other is the German original factory upgrade and retrofit store, that is, the construction of the original Harman Catton audio system or the more high-end original Bauer Weijian diamond audio system.
After thinking about it, I am more inclined to improve the plan of the original factory, because this scheme is more in line with the BMW 5-Series model, which may be more suitable for the BMW 5-Series. After all, the design of the BMW engineer is reasonable. Although it is possible that what DSP is effective, the brand is complicated, and all models can be installed, and there is no exclusive match. After determining the construction plan, I found several local refitting stores. Then I chose a store with better professional and better construction and decided to refit a set of original Harman Catton sound system (the full set of Bauer Audio is too Fermi to handle, in fact, the budget is limited. It is said that Harman Catton audio equalizer can meet the sound quality requirements of most riders).
Next, let’s get to the point and go to the store to construct a complete set of 16-horn Harman Catton sound system in the original factory.
Don’t say much: the high-definition picture is presented.

The store put a full set of original 16-speaker Harman Catton Logic7 surround sound, I also came one, full of accessories, one does not fall, ready to go, quietly waiting for the owner’s “distribution”?

Side photos, the full set of original Harman Catton sound includes 16 speakers and two Ethernet power amplifiers, as well as a full set of Harman cover plate and power amplifier bracket power amplifier box and a set of wire harness.

The black box is the high-equipped power amplifier box that the construction 5 series original Harman Catton stereo needs to change, because the original car does not have a subwoofer, so there is no bracket, and the box is large. Now the bracket with Harman Catton stereo and fixed subwoofer amplifier takes up a little space and the original black box cannot be installed, so change this smaller power amplifier box!
In addition, I have learned that most of the original Harman Catton audio systems are dismantled by the original factory, some are dismantled abroad, some are dismantled in domestic channels, and some are dismantled by car friends selling the original car with high stereo to restore the low configuration, and a few are ordered according to the part number through the BMW warehouse channel, not only the audio, including the original 360 panoramic view, the original factory fragrance negative ions. The original factory ACC and other accessories can also be ordered.

This is the original bass amplifier, which is installed on a special bass bracket.

The original Harman Catton alto close-up

This is the original Harman stereo treble, and the 5 series original treble is brushed aluminum film.

Details of the back of the tweeter, terminal and back paper details can be seen, you can refer to this
(because this set of stereo is removed from the original high-end car, don’t worry about it is a fake.)

The two pieces of metal are the original Harman dual Ethernet power amplifier, which carries the “power output” of the whole set of audio. It is very important, and these two things are also very valuable.

The original Harman Catton bass, this big guy is installed under the front and passenger seat

Next, enter the construction and disassembly link, disassemble the door and arrange the horn line, and install the stereo in the corresponding position.

There is a small piece on the right side of the trunk of the original car, which is the so-called RAM audio processing module of the original car. It was immediately replaced by a high-equipped Harman audio processing module to take a picture as a memory.

No, no.

The bass of the original Harman Catton audio is installed under the seat of the original car, which is positively compared with the bass removed by the original car. The material and basin shape are completely different.

Next, we enter the relatively tense and exciting part of the rear door opening to install the Harman cover and the horn. Since there is no horn hole in the back door of the original car, the rear door of the full set of Harman Catton audio needs to be installed, so install a horn cover for the opening of the rear door.

This picture is from the Wechat conversion store, the master of an electric drill away, in fact is quite skilled, this construction I can feel at the site, will soon be a good hole, the so-called arts specialize in it! I would like to give a big compliment here. The opening in the back door is not so nervous. In the hands of the masters, it is just like playing.

Look at the round hole dug out of the back door. Don’t be nervous. Shall we keep looking down?

Look! After installing the cover of Harman Catton, does it look much more beautiful? it looks exactly the same as that of the original car. I can’t see that it was dug later. Haha, it’s perfect.

The last two blocks are the BMW 5-Series original dual Ethernet power amplifier just installed, with the original factory special location and the original power amplifier bracket installation, which is perfect. Compared with throwing the power amplifier directly to the side without the bracket, the perfectionist still likes the original feeling.

One more detail, the wire harness all follows the original car line neatly, professional, and looks refreshing and comfortable, which is one of the reasons why I chose the plan of the original factory!

Can not resist the temptation of the boss anyway, the car door has been dismantled, then on the way to the original factory four doors keyless entry and the original factory kicked together to install it! The masters are under construction.

This is to lead the wire to the car door when wiring, and the masters all use the cable clamp to clip the special terminal, and then insert the corresponding card position. This detail is really super meticulous, perfect and intact, and the details determine success or failure, and the professional matters are handed over to the professionals. or don’t worry.

The sound cover in the front door of the original car is dark and looks uncomfortable. after changing into the original Harman cover, it looks really high-end, .

Compared with the original Harman alto, there seems to be little difference between the ordinary alto and the original Harman alto, but there is a big difference in sound quality.

After the central control center cover of the original car was removed, I was dizzy! What attracted your attention was actually two holes, and there was nothing. No wonder the sound quality was so bad. It was too bad.

The original factory Harman Karton stereo has been installed in the center. There are two speakers in total, one treble and one midrange. It plays a good surrounding role and connects the left and right sound fields. It is still very important.

The next step is to use the complete set of original Harman Kardon speakers that have just been installed to test the BMW Engineer Computer? Programming and setting the code so that it can perfectly match and communicate with the original car. Otherwise, it will not make a sound just by installing it, and it will have to be done with a computer. Only after programming, and then the equalizer and Logic7 surround words will be available in the navigation screen sound menu

Finally, after testing everything, it is to reinstall the door and restore the vehicle

The original Harman Kardon stereo treble cover is very comfortable to look at, and the logo is eye-catching and clear, which is beautiful and pleasant to hear.

A close-up of the a-pillar treble details

Through computer programming by BMW engineers, the words Logic7 surround sound effects and equalizer adjustment options appear on the on-screen sound menu interface. With it, the sound quality adjustment is more powerful. You can adjust the accent, treble and different styles according to your preferences. It is very powerful, here is a big praise?

The equalizer option is divided into 9 sections of frequency HZ adjustment, covering the adjustment of treble, midrange, and bass. The tuning methods are also varied. Drivers can adjust their favorite style according to their preferences. This is very good.
I am quite satisfied with this modification and upgrade. I have seen everything from the product to the entire construction. The details are very satisfactory, and it also makes people feel confident that the car will be delivered for construction. It also confirms that saying: There are specialties in the industry.
Finally, let’s make a simple comment on the effect of the complete installation of the original Harman Kardon sound system: Compared with the ordinary 6-speaker sound quality of the original car, the improvement is huge, and this huge is not an exaggeration.(Because compared to those who originally had a high-quality original car with Harman audio, they may not have a deep understanding of it, because the original car was Harman every day may not feel as obvious as I do.) After all, I listen to 6 speakers every day, and now I switch to the original factory 16 speakers. The difference between Harman and Harman is still very big. Secondly, the budget of more than 10,000 yuan is actually not bad. After all, the complete Harman audio system personally feels that the price is super high. As many friends say, Harman Kardon Sound is not very top-notch, but it has a good sound balance and feels quite good whether you sit in the front row or the back row.(Compared to the original car without speakers in the back row, it sounds much more interesting when replacing it with Harman’s back row. This experience is great.) Then it starts to be very durable and the sound level is much better. The bass of Harman Karton Sound is still commendable. The comparison is mellow and powerful. I will enjoy my favorite songs in the car after work, and I feel really relaxed!
Good sound can indeed bring us more, understanding life, and lamenting life!
That’s all for today’s sharing. Thank you for watching!