Mini IPX6 Waterproof Bluetooth Speaker is a compact and versatile portable audio solution designed for outdoor lifestyles, travel, and everyday entertainment. Featuring Bluetooth V5.0 wireless connectivity, 5W powerful sound output, multi-function playback options, and IPX6 waterproof protection, it delivers reliable performance in various environments. With its lightweight ABS design, long-lasting battery, and customizable OEM/ODM options, this mini wireless speaker is an ideal choice for global retailers, distributors, gift companies, and consumer electronics brands seeking competitive portable audio products.
A multifunctional sleep and lifestyle speaker combining white noise, Bluetooth audio, and warm ambient lighting. Featuring Bluetooth 5.3, adjustable light modes, and a rechargeable battery, it creates a relaxing atmosphere for sleep, home wellness, work, and daily relaxation. An ideal smart audio product for retailers, brands, and gift markets.
The Mini Touch Furniture Speaker combines modern design with powerful 2.1-channel audio, making it an ideal smart audio solution for furniture and home applications. Featuring Bluetooth 5.0, intuitive touch controls, USB/AUX connectivity, and rich bass performance, it enhances everyday entertainment while adding value to modern furniture products.
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.
Portable loudspeaker Enclosures & Horns: What They Do, How They Do It?
Baffles, bass reflex, optimized output, horn design, flare curvature, directionality and other key features.
In almost all modern portable loudspeaker systems, the enclosure contains some or all of the driver elements that make up the system, and it separates the rear radiation from the front radiation of one or more portable loudspeaker unit drivers. It also limits the rear radiation of the portable loudspeakers and compression drivers to avoid unwanted sound energy hitting the stage.
Why separate the anterior radiation from the posterior radiation of the basin? As the basin driver moves forward, it provides positive pressure to the atmosphere, manifesting as a shock. When it moves backwards, it provides negative pressure. And it's repeating these two actions at a rapid rate -- say, 1,000 times per second at a 1kHz wavelength. If the front and rear radiated energies are not separated from each other, each will cancel the output of the other because they are 180 degrees apart.
There are several ways to prevent such offsets. The simplest are flat baffles, a method that dates back to the early 1900s. The first baffle is used to mount the basin driver, and its purpose is to isolate the front radiation from the rear radiation. The larger the baffle, the lower the frequency range that the basin driver can reproduce (within the limits of other factors, of course).
As the frequency decreases, the wavelength becomes longer. If the baffle is big enough, it can even separate the positive low frequency radiation in the front from the negative radiation in the back, preventing the cancellation of the front and rear.
Over time, it became clear that 18 x 18 foot baffles were not practical except in fixed installation cases for movie theaters. Next, portable loudspeaker designers came up with the idea of an infinite baffle, similar to a sealed cabinet. It does work.
As rock and roll replaced vocal group and big-band music in the 1960s, there was a need for more output from portable loudspeakers. Bass-reflex enclosures help meet new demands for power, clarity, and low-frequency dive.
Bass reflex enclosures employ an outlet that captures the rear energy of the basin driver and sends it out through a relatively small, usually ducted, flow guide. The explanation isn't particularly thorough (how do those long wavelengths get through that little port?) so if you don't fully understand it, don't worry. It requires complex pressure dynamics equations to interpret correctly.
The bass outlet can be used to increase the LF output, although the output of the port is out of phase with the vibrating pressure output of the basin.
In real life, "optimized outlet bass reflex enclosure" is a term used in marketing brochures for years to describe low frequency portable loudspeakers that sound really good.
But if you measure its phase response, its port energy will show a complete reversal over the frequency range from the directly radiated energy. Fortunately, in the same frequency range, the basin driver moves very little and most of the sound energy can be output through the outlet.
In fact, the way to measure the outlet tuning center frequency, known in terminology as Fb (the resonant frequency of the driver and cabinet combination), is to place a measurement microphone on top of the basin and look at the response on a high-resolution spectrum analyzer .
There will be a noticeable dip in the spectral response. The center frequency of the sag is the cabinet tuning frequency, and the depth of the sag roughly represents the structural advantage of the cabinet. Even a small air leak will reduce the depth of the lower limit and the sag should be as deep as possible to maximize energy transfer to the outlet. Irregular shapes indicate harmonic resonances, such as vibrating plates.
A rigid box that is firmly supported will produce a smoother, more aesthetically pleasing curve than a poorly built box (see chart below). In general, portable loudspeaker cabinets should be as durable as possible. The energy absorbed by the fluttering box sheet is wasted energy rather than propagating outward.
The lowest point of sag is the tuning frequency of the cabinet. The enclosure is well sealed and well supported, as indicated by the depth of the sag and the smooth shape.
Another use of the bass reflex outlet is to limit the excursion of the basin driver to a frequency that might otherwise bottom out by overstroke. In this case, the outlet is used more for stroke control than for increasing the output. This results in horn loading, which is often combined with bass reflex cabinets in the low frequency range.
Beginning with theater portable loudspeakers, designers such as James B. Lansing built low-frequency horn portable loudspeakers made of shaped wood to increase the output of the system. In the early days, 25W amplifiers were the limit, so portable loudspeaker efficiency was a very important issue.
