Many musical instruments are made of copper. Copper has high rigidity, and could further reduce sound degradation. Enhance the resonance effect, the tone is clearer and brighter, reproduce the fresh thorough and extremely dynamic sound.
ED9 with bright silver chrome plated surface, simple and textured.
Innovative design nozzles which end as bowl. Improves the crowded mids’ drawbacks of traditional sound chamber, improve width of sound frequency range. Mids are more natural and coherent.
Now, more about ED9 design. Starting with a cable, this is something you wouldn’t expect from a “budget” IEM. It has a quality gold plated L-shaped connector with a nice strain relief. The multi-colored twisted wires are inside of a clear rubbery shielding which is soft and easy to manage without getting tangled too much. Y-splitter is small and rubbery with a nice strain relief around all 3 points of wire connection. Right side of the wire also has inline remote control with universal multi-function single button and mic right next to it. You don’t have to worry about compatibility of volume control (Android vs iOS) since those buttons are not present, but a single click Play/Pause/Call works flawlessly, and double-click skips to the next song with my Note 4.
The wire goes to a metal chrome plated shell and has a nice strain relief at the attachment as well. As you can see, a lot of thought went into the cable design and durability of every joint connection. The shell itself is very slick and has a little bit of weight to it. Considering that and a fact that you can only wear it wire down, you do need to pair it up with a set of eartips that give you not only the best seal but also a grip to hold these IEMs securely inside of your ears. The shell itself has multiple air vents including a pinhole next to the attached wire, the other one at the base of the nozzle filter, and two large wire mesh covered ports on the back of the shell. Combined, all this contributes to an open airy wide soundstage and at the same time a mediocre isolation. Also, top of each earpiece has a clearly spelled Left/Right marking. Microphonics effect was noticeable when cable brushed against my shirt, but it wasn’t too bad.