Changzhou Jiayuan Electronics Co., Ltd.  

Product Name: From China Factory Little Speaker 18mm Woofer for Mini Soundbox Model NO.: SF18JD4-2.0HD Brand: Jy Certification: ISO9001, CE, RoHS WORD nChannels: 2.1Channel Usage: Expand Volume Radiation Mode: Direct Radiation Type Style: Head-mounted Transducer Principle: Dynamic Earphone Cone: Cloth-edge Transmission Mode: Bone Conduction Category: Speaker Dimension: 28mm*5.2mm Sound Pressure Level: 87 dB (at 1.0W/0.1m with Baffle Avg0.8K,1.0K1.2 Voice Coil Imp: 4ohm Rated(Max.)Power: 1.0(2.0)W Trademark: JY Transport Package: Paper Specification: 18mm*5.5mm Origin: China HS Code: 85318090 Product Description 1-1Dimensionφ18×5.5t1-2Rated Input Power1.0W1-3Max Input Power2.0W1-4Rated Impedance4±15% Ω /1KHz/1V1-5Resonance Frequency(f0)850±20% Hz/1V1-6Sound Pressure Level87±3 dB at (AVG 0.8.1.0,1.2,1.5)KHz0.1M/0.1W 1-7Frequency Range200HZ ~ 20KHz1-8Total Harmonic Distortion5%MAX. at 1KHz, 1V1-9Flux Density1.0T1-10Operation TestMust be normal at sine wave and program source1.0W. 1-11Buzz, Rattle, etc.Should not be audible at 2.0V sine wave between(200 Hz ~ 5KHz)1-12Weight8g1-13Voice Coil Diameterφ10.25mm 1-14Magnet (NdFeB)φ9.6×1.5t mm1-15AppearanceShould not exist any obstacle to be harmful to normal operation; damages, cracks, rusts and distortions, etc.