TITANIUM DIAPHRAGM;new hardened Titanium Diaphragm Hardened Titanium DiaphragmProduct Technical Feature Instruction:* Adopted the latest treatment technology, to be able to strengthen the intensity of the diaphragm, increase the hardness and improve the elastic modulus.* Transmit sound wate faster, replay original sound more effectively, make it sound clearer, energetic, rich and higher fidelity ...