Experience immersive sound with our Active Noise Cancelling TWS Earphones, featuring ENC dual microphones, gaming/music dual mode, touch control, and Bluetooth 5.2 connectivity. Designed for work, travel, gaming, and daily entertainment, these wireless earbuds combine smart features, comfortable design, and reliable performance for modern lifestyles.
Premium Over-Ear Stereo Headphones combine elegant design, comfortable wearing, and natural sound performance for modern audio users. Featuring African ebony, metal, and PU materials, soft PU earpads, and wide device compatibility, they deliver a premium listening experience for music, entertainment, learning, and daily use. An ideal OEM/ODM audio solution for global brands, retailers, and distributors.
2.0 USB Speaker with RGB Light combines powerful stereo sound, modern design, and colorful lighting effects for gaming, office, and home entertainment. Featuring dual 2-inch drivers, USB plug-and-play connectivity, and a compact ABS housing, it delivers a stylish desktop audio solution. As a China OEM/ODM speaker manufacturer, we provide customized solutions for global brands, retailers, and distributors.
The Mini Suction Cup Wireless Charger combines compact design, wireless convenience, and practical functionality. Featuring 10W fast wireless charging, a stable suction cup structure, and a lightweight ABS + silicone body, it is ideal for home, office, travel, and gift applications. A smart lifestyle accessory designed for retailers, brands, and distributors seeking innovative charging solutions.
Hearing Aid TWS Headphones combine Bluetooth audio, hearing assistance, ANC noise cancellation, and voice calling in one compact design. With Bluetooth 5.1, a portable charging case, and comfortable wearing experience, they are ideal for daily communication, travel, and entertainment. A smart audio solution for retailers and brands seeking innovative wearable products.
Smart Outdoor Inflator Companion combines an air pump, power bank, and outdoor light into one versatile device designed for modern outdoor lifestyles. With a portable design, powerful performance, and multifunctional features, it provides a convenient solution for camping, travel, cycling, and emergency situations. This innovative outdoor electronics product delivers both practicality and market value, making it an ideal choice for retailers, brands, and distributors seeking differentiated smart lifestyle products.
China Manufactured Bicycle Bluetooth Speaker is designed for outdoor enthusiasts with waterproof performance, portable design, and reliable wireless audio. Featuring Bluetooth 5.0, IPX7 waterproof protection, 5W sound output, and rechargeable battery, it is an ideal solution for cycling, travel, camping, and outdoor lifestyle markets.
A China-based OEM/ODM manufacturer established in 2008, specializing in Bluetooth speakers, headphones, sound bars, and smart audio devices. We provide full customization, strong R&D support, and reliable mass production for global brands, retailers, and distributors across Europe, Japan, Korea, and Australia.
OPENEAR HEP-0170 is a lightweight bone conduction headphone designed for sports and daily use. It delivers sound through cheekbone vibration, keeping ears open for comfort and safety. With Bluetooth 5.2, IPX5 water resistance, and 6–7 hours of playtime, it is ideal for running, cycling, commuting, and calls. A perfect OEM/ODM wearable audio solution for global brands.
The Pet Training Companion NSP-0026A is an innovative Bluetooth speaker designed to make outdoor activities with pets more enjoyable and convenient. Combining Bluetooth 5.4 connectivity, voice reminder functionality, hands-free calling, an LED night light, and a leash hook in one compact device, it enhances everyday dog walking, training, camping, and travel experiences. As the global pet economy continues to grow, multifunctional smart accessories that blend entertainment, safety, and practicality are becoming increasingly popular. For brands and retailers, this product offers an excellent opportunity to meet rising consumer demand while expanding into the fast-growing smart pet electronics market.
So how to solve this problem?
First of all, we need to understand why the original phase curves of different models or different structures of outdoor bluetooth speakers are different. There are roughly 4 reasons:
1. The frequency division order is different or the frequency division slope is different. Each order of the high-pass filter and the low-pass filter has a phase shift of 45° at the crossover point. Different outdoor bluetooth speakers have different crossover structures, and some are two. Order, some are third order;
2. For externally driven outdoor bluetooth speakers, different unit processor channels have corresponding delay adjustments, that is, different programs have different delays. The amount of delay is determined by the delay difference between the units caused by the outdoor bluetooth speaker structure and the crossover slope, which results in different delays.
3. Different built-in crossover outdoor bluetooth speakers have different crossover adjustments. Some trebles have positive polarity, and some trebles have reverse polarity, so the phases of different models are different.
4. The number of frequency divisions is different. For example, three-way and two-way outdoor bluetooth speakers cannot achieve the same phase. Obviously, the reason is that the three-way frequency has one more frequency point than the two-way frequency, and the phase shift is more serious.
Therefore, the original phase curves of outdoor bluetooth speakers that are not the same model or different in structure will definitely be different. When they are used together, they will have an offset effect. Even if they are taken away to compensate for the equivalent delay difference, the offset will also occur.
When we are debugging, can we solve the problem with the following methods?
A. Test the original phase curves of the two outdoor bluetooth speakers(main and auxiliary) at close range, and then adjust the phase of the auxiliary outdoor bluetooth speaker to be the same as that of the main amplified outdoor bluetooth speaker. After finding the delay difference, add it to the auxiliary outdoor bluetooth speaker.
B. The second method is to first measure the delay difference of the two sets of outdoor bluetooth speakers, and then find their phase difference, and finally, pull the phase curve of the auxiliary outdoor bluetooth speakers to be the same as the main PA outdoor bluetooth speaker.
From the operation method, we can conclude that the difference is only the difference in the sequence of adjustment steps, but for actual operation, the first type is easier to learn, because the phase curve at close range is relatively stable and easy to observe and judge. But if the two sets of outdoor bluetooth speakers have been hung higher, the operability of the scenario A method is relatively weak.
The above is for the debugging between outdoor bluetooth speakers of different manufacturers. Sonic will adjust the phase before shipment. For customers, the later processing will be more convenient.
