https://penonaudio.com/bqeyz-spring-1.html
"BQEYZ Spring 1 1BA + Piezoelectric + Dynamic Driver Hybrid 2Pin 0.78mm HiFi In-Ear Earphones
Description
Original design driver
13mm Bass dynamic driver + ultra-high frequency 7-layers piezoelectric & custom mid-high freqency balanced armature
Patented design
The world premiere of the industry’s first unibody for piezoelectric and dynamic drivers. Built with advanced independent sound tuning technology to unleash the maximum potential of each driver unit.
Dynamic diaphragm
Imported PU, made for better clarity and the depth performance of bass.
With the use of carbon fiber and woolen surface, the vocal are now more engaging also comes with extended highs.
Aluminum shell
5-Axis CNC product
High gloss surface process
Gold anodized
Upgrade cable
2pin 0.78mm
Replaceable design
8 core silver-plated, 0.06mm x 25 shares
Eartips
Atmosphere for bass
Reference for human voice
Foam eartips for isolation
Specification
Model: Spring 1
Frequency: 7-40kHz
Impedance: 43ohm
Sensitivity: 108±3dB"
139$
![Image](https://penonaudio.com/image/cache/catalog/BQEYZ/Spring%201/BQEYZ%20Spring1E-960x720.jpg)
![Image](https://penonaudio.com/image/cache/catalog/BQEYZ/Spring%201/BQEYZ-Spring-%201-960x720.jpg)