Meet the Face Changing Batman Bluetooth Mini Speaker, a fun and stylish audio companion featuring interactive EQ sound effects, colorful breathing lights, TWS connectivity and hands-free calling. With its compact design and 3W speaker, it is perfect for desks, bedrooms, travel and everyday entertainment. A creative gift choice for music lovers and gadget fans, bringing personality and fun to every listening moment.
Meet the Dog Cube Dancing Speaker, a creative Bluetooth speaker that brings music and fun together. Featuring a cute dog-inspired design, moving legs that dance to the rhythm, and convenient smartphone control, it adds a playful touch to parties, picnics, and everyday entertainment. More than just a wireless speaker, it also makes a charming decorative accessory and a unique gift for anyone who loves creative audio gadgets.
Meet the Sawolol HoneyWait Smart Pet Companion Speaker, designed to make everyday pet care more interactive and convenient. Featuring Bluetooth 5.4, smart app connectivity, disconnection alerts, custom training audio, remote voice calling, an LED night light and IPX5 water resistance, this compact portable device helps pet owners stay connected with their furry friends at home or outdoors. Its lightweight design and convenient leash hook make it a practical companion for modern pet lifestyles.
Discover the Cute Dancing Speaker Arab by SAWOLOL, a fun Bluetooth speaker that combines adorable character design with interactive dancing movements. Featuring Bluetooth 5.4, TWS wireless connection, hands-free calling, and a 3W speaker driver, it brings music and entertainment into everyday life. With a built-in rechargeable battery, up to 4 hours of playtime, and multiple color options, it is perfect for home entertainment, desktop decoration, travel, parties, and creative gifting.
Discover the Santa Claus Cube Dancing Mini Speaker, a fun and creative Christmas Bluetooth speaker designed to bring music and festive joy to everyday life. Featuring a cute Santa Claus design, entertaining dancing movements, Bluetooth 5.0 connectivity, a 3W speaker and hands-free calling, it combines portable audio with playful holiday entertainment. With multiple color options and a built-in rechargeable battery, this mini dancing speaker is an ideal Christmas gift, desktop accessory and novelty audio gadget for the holiday season.
In essence, they are all stereo playback systems, but the difference lies in the low-frequency playback. The 2.0 speaker system comes with it, and the 2.1 speaker system has a special subwoofer for low-frequency playback.
Why take out the low frequency and hand it over to a special speaker for playback? Because the low frequency always needs a lot of loudness to be heard by people, it is also difficult for people to play back the low frequency.
Generally speaking, a speaker with a smaller area is more suitable for reproducing high frequencies, and a speaker with a larger area is more suitable for reproducing low frequencies. Because of the low frequency, the output impedance of the vibration unit is much higher than the radiation impedance, and this radiation impedance increases with the increase of frequency and radiation area. Only when the input impedance is equal to the power output impedance, the power output power can be maximized. Therefore, if you want to increase the low-frequency radiation power, the easiest way is to use a larger vibration unit. If you want to play back low-frequency sounds, the power must be strong and the speaker must be large.
The early traditional power amplifiers represented by Class A amplifiers have a very annoying characteristic, that is, most of the energy is used for heat generation, and only a small part of the energy is used for work. When people like small-sized speakers but want to enjoy high-quality low-frequency content, the famous audio engineer Josef Anton Hofmann successfully found the answer to this problem, that is, the speaker can only choose between volume, low-frequency dive and efficiency at the same time Both, this is the famous Hoffman's law. However, as mentioned earlier, traditional Class A power amplifiers used very little energy for sound work, so people equipped 2.0 speakers with speakers for playback of low-frequency content, and assembled the tweeter and subwoofer on a center, which became Coaxial speakers form a 2.1 system.
After the 21st century, people also began to apply class-d amplifiers to subwoofers. Class D amplification efficiency is higher, and the energy utilization rate is much higher than that of a class power amplifier; at the same time, smart engineers began to think about such a question: since the size of the unit determines the lower limit of low frequency playback, can we also install a subwoofer Two woofers? So it becomes the famous back-to-bass structure.
