Sound Evolution Logon Car Audio/Car Security

Established for over 20 years, sold over 8,000 units per year, sold over 300 units per year, and achieved numerous sales and contest prizes! This is an online shopping site operated by Sound Evolution Onlog, which has a reliable and proven track record.

We are honored to announce that we achieved 2nd place in the recent Security Sales Contest!

While we have proudly earned 1st place multiple times in Car Audio Sales Contests, this is our very first time ranking among the top in the Security category.
There are many specialty shops dedicated solely to car security or car audio, but being recognized in both fields is the result of our unwavering commitment since the very beginning: “Never compromise on either car audio or security.” Reaching this milestone in our 25th anniversary year is something we are truly delighted with and deeply proud of.
Above all, this achievement was only possible thanks to the trust and support of our valued customers. We sincerely appreciate your continued patronage.
Although we finished in 2nd place this time, we will continue striving for 1st place, improving our technical expertise, and enhancing our services. All of our staff will keep giving their best efforts, and we look forward to your continued support!

LOGON AUTO MALLThis is an online shop run by LOGON.
We have a wide selection of carefully selected car audio products, including speaker kits designed specifically for the vehicle model!

https://mall.logon.gr.jp

25th Anniversary EVENTOur store will celebrate its 25th anniversary in 2025.
To commemorate this, we will be holding a 25th anniversary event every month!

Click for details!

25th Air Conditioner Maintenance CampaignTo celebrate our 25th anniversary, we will provide free air conditioning maintenance to customers who have ordered car audio and car security plans online!In addition, we will also be installing it at a campaign price if only air conditioner maintenance is required!
Additional additive Wako's Power Air Conditioner 1234 is now available!

Click for details!

We have introduced a new system to make communication with customers easier!

More Convenient, More Smooth! New System Launches!

The first phase of our new system is finally complete! Starting next month, reservations will automatically receive a confirmation SMS one week before the reservation date, making communication even easier. After deciding on the details over the phone, you can now make credit card payments and electronically sign via SMS! You can smoothly and seamlessly place your order without having to visit the store.♪

What's more, if you have an email address, you can contact us by email, or by SMS if you don't! This system is safe and secure for everyone.

And the second phase is a new feature that allows you to get a quote or order with just one click if you find a blog post that you like! Feel free to contact us using the "Consult & Quote" button in the post.♪
What's more, even if the post is outdated, our system can instantly update it to the current price! We can always provide you with the latest information.

In addition to in-store payments, we plan to support various online payment methods in the future, so our system will continue to evolve even more conveniently! Regarding the calendar, we have reverted to displaying only regular holidays due to the new system we have devised. We will make the calendar more direct and clear, so please look forward to it!

Regarding efforts to revise on-board failure diagnosis equipment

When installing electrical equipment, we always use a vehicle diagnostic device to check for errors. If an error occurs, we will report it to the owner in advance and strive to return the car in the same condition as before the work.

From October 2024 onwards, vehicles with errors at the time of vehicle inspection may not pass the inspection, so future installation work will require sufficient knowledge and equipment.

At our shop, we not only check for errors when the car is brought in, but we can also print out and hand over the OBD diagnosis results after the work.

Prefectures with the most car thefts: 1st place Chiba 3rd place Saitama Why? Click here

Sound Evolution Logon is Chiba Prefecture's largest car audio and car security specialty store.

Many customers visit us from distant areas. Why? It's because of our demo board boasting the best speaker variety in Japan! You can compare different speakers and discover “What kind of sound do I personally like?” together with us.

From upgrading factory audio systems to making smartphone and Bluetooth connections more seamless, using digital audio players (DAPs) in your car, or replacing stock speakers with everything from trade-in types to true high-end ones, we support a wide range of both domestic and imported vehicles!

Our work environment is fully equipped. With climate-controlled pits to protect your car, precision woodworking equipment, and diagnostic tools compatible with all manufacturers, we ensure perfect checks. We also handle the latest HFC-1234yf refrigerant gas and use trusted Snap-on tools for high-quality finishing.

Vehicles left in our care are protected around the clock by ALSOK and 10 security cameras, offering 24/7/365 monitoring. You can leave your car with complete peace of mind.

If you're thinking “I'd like to tweak the sound a bit” or “I want to take my time choosing the right one”, please feel free to consult with us. An exciting experience is waiting for you!

demo board
A special page has been opened that allows for Japan's only types and listening patterns! !
Special page opened! !

Work on your car at the optimal temperature
air conditioner pit

latest woodworking equipment
Shorter work time and accuracy

computer diagnostic machine
Diagnostic equipment compatible with all manufacturers

Scratch prevention
thorough body masking

security
24/7 monitoring system with ALSOK and 10 cameras

Car Security is the shortest normal installation date!

IGLA 2025-09-25 (Thu)～

Grgo 2025-10-02 (Thu)～

Panthera 2025-10-02 (Thu)～

Installation can be booked after the earliest installation date. For IGLA, if you want to install it before the date, we can offer an express price. For details, the price of the vehicle-specific plan will automatically change.