Open Box Penon Quattro 4DD IEM

Introduction to Excellence: Penon QUATTRO 4 Dynamic Driver 2Pin 0.78mm HiFi Earphone Audiophile IEM

Optimal Performance Preparation: Needs to burn in 200hrs.

Handcrafted Durability: Handmade, the earphone shell is solid and more durable.

Comfortable and Aesthetic Design: Using medical grade resin material, light and beautiful, comfortable to wear.

Enhanced Sound Layering: The QUATTRO uses an independent 3-way crossover and 3-independent conduit design for better layering performance.

Enhanced Bass Experience: The low frequency uses the latest horizontally opposed dual low-frequency driver to further enhance the bass effect.

Rich Midrange Details: Middle frequency uses a new generation of graphene materials, more rich details and listening.

Smooth High Frequencies: The high-frequency uses a new process to make the sound smoother and more delicate.