Add a touch of style and power to your audio experience with this passive amplifier - perfect for listening to music or watching videos without consuming battery power!This passive amplifier has been carefully modeled to maximize sound amplification thanks to a quasi-logarithmic profile, inspired by traditional acoustic horns.The gradual transition between profiles ensures optimum amplification of mid-range frequencies (500 Hz to 2 kHz), ideal for music and voice.

Expected gain: Enjoy acoustic gain of 6 to 9 dB, i.e. an increase in perceived volume of 1.5 to 2 times louder, without any power supply.Spiral-on-cone design: The spiral geometry, built on a cone to raise the center, improves sound directivity, projecting clear, powerful sound towards the user.Compatibility: Designed to fit a wide range of modern phones with base speaker (80 mm x 10 mm x 12 mm notch, 12 mm x 6 mm opening at 18 mm from side).

Compatible with :◦ Huawei: P40, P30, Mate 20.◦ Samsung: Galaxy S24, S23, A54 (S24 Ultra limit).◦ Apple: iPhone 14, 15, 13, 16.◦ Google: Pixel 8, 7, 8a.◦ Xiaomi: Xiaomi 14, Redmi Note 12.◦ OnePlus: OnePlus 11, 9.◦ Others: Asus Zenfone 10, Sony Xperia 1 V (check alignment for stereo or wider models).

3D printing settingsNo supportUse PLA with 0.4 mm nozzle and 0.12 mm layer height.