From the ISN FB page:
(ctto)
In 2019, we produced the H40, 3BA+1DD hybrid IEM. The H40 can compete with the US$400 IEM in the market. A year later, we started to develop the H50. We made several samples and the sound was very good, but it couldn't be better when compared with the H40. We reconsidered that to surpass the H40, the H50 sound must reach US$500. After a year of research and development, we finally did it.
Descripition
Handmade resin shell
Stainless steel nozzle
4 Balanced Armature+1 Dynamic Driver Hybrid MMCX Detachable Audiophile IEMS
2BA for high frequency,2BA for middle frequency
10mm composite diaphragm Dynamic driver for bass
The composite diaphragm is a product made of high-pressure polyethylene as the main raw material and extruded and and formed into bubbles at a high temperature of about 230 degrees. It is a new type of plastic with light texture, good transparency, non-toxic and odorless,It has good shock absorption, impact resistance, heat sealability, enhances the rigidity and elasticity of low and middle frequencies, and improves the sensitivity of the speaker!
Specification
Model: H50
Driver: 4 Balanced Armature +1 Dynamic driver
4BA: 2BA for high frequency,2BA for middle frequency
1 Dynamic: 10mm composite diaphragm Dynamic driver for bass
Impedance: 25ohm
Sensitivity: 108dB
Frequency response: 20-20kHz
3 channels 3-way crossover
Connector: MMCX
Plug: Gold-plated
Cable length: 1.2M