Sendiy M1221 Concentric Dynamic and Armature Double Unit Metal HIFI Earbuds In Ear Hook Earphone Hybrid Technology Headsethttp:

A meticulous design combined with technology, art and grace

Materials adopted aerial aluminum alloy that own a 10 times greater hardness and density than the normal metal. The character of our material leaded to a difficult process and low success rate to us, however, yielded a durable cavity and a stable control of sound resonance for the customer. The irregular shape designed according to human ear carnal was the most difficult part in manufacturing operation.

Every shield was cut and carved by high-accuracy CNC, not by traditional pattern die, then went through a series of manual grinding and ultrasonic cleaning. Anodic oxidation process was used to color the shied which guaranteed the insulation and durability.

Dynamic and Armatured Double-Driver Unit Excellent tri-band expression We developed this double-driver unit after two-year cooperation with a Taiwan famous acoustics. One dynamic unit and one armatured unit were axially combined in parallel. Dynamic unit takes charge of the low frequencies, while armatured unit is in charge of upper midrange. Hundreds of tests were taken to deal with the common problem of inter-unit connect and make the current perfect status. Removable sound induction tube Three modes for various perception （SILVER NOZZLE BASS BOOST/BLACK NOZZLE HIGH BOOST/GYAY NOZZLE REFERENCE SOUND） Aluminum alloy curved by CNC bring more interests: customers can change the tube to control the air volume in tube and then get different sound results. Every tip is covered by a rubber ring to avoid leaking voice, and zigzag shape can prevent the slip of earphone. When replacing the tube, all you need is to twist the tube counterclockwise.

Packing &accessories list

M122 earphone *1 | copper plating silver wire for audiophile*1 |6n occ silver upgrade line*1| black, silver and gray sound induction tube*12 | memory sponge cap*4 | double silica gel cap*6 | single silica gel cap*6 | wire clip*1 | three-proof earphone case*1