Ultra-high-quality electrostatic unit piezoelectric ceramic [M148] graphene diaphragm dual-cavity DIY earphones

【Product introduction】 Product: mmcx headphones + headphone upgrade cable Model: M148 Type: In-ear flat headphone Structure: Piezoelectric ceramic unit Pin: mmcx Applicable: mobile phones/tablets/headphones/computers...etc. Frequency: 20-20 KHz introduce: What is a piezoelectric ceramic unit? The dynamic unit uses an alternating current passing through the voice coil and the sound film vibrates under the action of the permanent magnet to produce sound. The moving iron is similar, with alternating current passing through the coil. Under the action of the permanent magnet, the vibration of the armature drives the thimble and diaphragm to vibrate and produce sound. They all produce sound indirectly through a voice coil wire with a diaphragm attached. The piezoelectric unit is an alternating voltage driven piezoelectric element with an underlying metal substrate that vibrates and produces sound. Therefore, in terms of response speed, the piezoelectric unit is incomparable to moving iron and moving coils. The energy conversion steps of moving coils and moving irons are: the current is converted into vibration under the action of the magnetic field, A lot of energy is lost in the process, and the piezoelectric unit is directly driven by voltage. Therefore, relatively speaking, the energy loss is very small and the energy consumption is also very small. The sound of piezoelectric is comparable to that of a moving iron unit. Because metal pieces are used to make sounds This is something that moving coils and moving irons cannot do, so the clarity and frequency will be higher than that of moving coils. [Notes on Kawaki] 1. When connecting the earphones to the device, be sure to insert them in place to avoid poor contact causing intermittent or silent sound. 2. When using headphones, the volume should be gradually increased from low to high. Do not suddenly increase the volume to avoid damage. 3. It is recommended not to increase the volume excessively to resist the noise of the surrounding environment, such as the noisy streets of buses and MRTs, so as not to put you in danger. 4. MMCX replaceable cable [Kawaki’s warm reminder] ※The dimensions are all measured manually. Everyone's technique is different. The error within 1-3CM is normal. Please refer to the actual situation. ※Color difference is unavoidable, we will try our best to adjust it to be the same as the real product. If you are sensitive to color, please consider carefully before purchasing. 👍 Free shipping for all products in the store if the purchase price is exceeded. Please leave the shipping to us. [Instructions for Shopping in Kawaki] ． After placing an order for store products, the ready stock will be shipped within 1 day. If there is any shortage, you will be notified the next day. ． If you have any questions, please contact the store. Don’t worry about the after-sales department, thank you. [Chuanmu Speaker is happy to serve you] 👍The store has customized bulk shipping and retail services 👍We have experience in cooperation with many small and medium-sized enterprises. For bulk purchases, please contact the store. 👍 👍 👍Kawaki is confident that you will like it 👍 👍 👍