BQEYZ Vesper Dynamic & PZT Bone Conduction Hybrid IEMs

BQEYZ Vesper: Hear the True Colors of Sound

The BQEYZ Vesper is a hybrid in-ear monitor pairing a 10.8mm dual-cavity dynamic driver with a direct-drive PZT bone conduction driver. A 4μm ultra-thin diaphragm, textured resin shells and a detachable alloy-conductor cable bring together acoustic engineering and individual styling. Designed for listeners who enjoy expressive vocals and rich musical detail, Vesper draws its inspiration from the warmth and color of the morning glow.

Key Features

• 10.8mm dual-cavity dynamic driver with a 4μm ultra-thin diaphragm.
• Dual hot-pressing process balances diaphragm rigidity and surround flexibility.
• Direct-drive PZT bone conduction driver positioned near the ear-contact edge of the shell for high-frequency compensation.
• 3D-printed resin shells with aluminum foil and 3D relief faceplates.
• Four-conductor silver-plated Furukawa copper-silver alloy cable.
• Detachable 0.78mm 2-pin connections.
• Choice of 3.5mm single-ended or 4.4mm balanced plug versions.

4μm Diaphragm with Dual Hot-Pressing

Vesper’s dynamic diaphragm is formed in two hot-pressing stages. The first shapes the central dome to increase rigidity; the second reshapes the surround to improve flexibility. BQEYZ uses this approach to balance controlled high-frequency reproduction with deep, elastic bass rather than relying on a single forming cycle.

10.8mm Dual-Cavity Dynamic Driver

The 10.8mm dynamic driver combines a dual-cavity structure with the ultra-thin diaphragm. BQEYZ describes the resulting presentation as delivering decisive drum attacks, smooth strings and full, sweet vocals. Put on a familiar vocal recording and settle into a presentation intended to balance rhythmic impact with warmth and an open sense of space.

Direct-Drive PZT Bone Conduction

The PZT bone conduction driver sits near the shell edge closest to the ear-contact area. This direct-drive arrangement is designed to provide high-frequency compensation alongside the dynamic driver, supporting the reproduction of fine overtones and subtle vocal details. Its contribution depends in part on fit and contact with the ear.

Sound Character

According to BQEYZ’s product description, Vesper is tuned for solid low-frequency extension and elasticity, full and transparent mids, and bright yet smooth highs. These are the manufacturer’s sound descriptions rather than independent measurements or listening-test findings.

Individual Aluminum Foil Relief Faceplates

The 3D-printed resin shells are paired with faceplates combining aluminum foil and 3D relief craftsmanship for a layered, tactile finish. Multiple color options are available.

Please note: The aluminum foil relief process creates a unique pattern on each earpiece. Faceplate textures will vary, and product photographs are for reference rather than a guarantee of an identical pattern.

Silver-Plated Furukawa Alloy Cable

The included cable uses a Furukawa copper-silver alloy core with a silver-plated surface and a deep brown appearance. Its four main conductors use a multilayer twisted construction, with 21 fine 0.08mm cores per main conductor arranged in seven-core groups and three-group twisting. This construction is intended to support stable wired signal transmission while remaining practical for everyday listening.

Choose Your Plug Version

Select either the 3.5mm single-ended or 4.4mm balanced version to match your source equipment. The gold-plated audio plug features a CNC-machined metal housing, while gold-plated 0.78mm 2-pin connectors allow the cable to be detached from the earpieces.

Compatibility: Choose the plug that matches your player, DAC or headphone amplifier. The two plug sizes are separate version options; both plugs are not stated to be included. Devices without a matching headphone output require a compatible DAC or adapter.

Specifications

What’s in the Box?

• 1 × Pair of BQEYZ Vesper earphones
• 1 × Detachable audio cable with the selected plug
• 1 × Carrying case
• 1 × Cleaning brush
• 6 × Pairs of silicone ear tips (S/M/L)
• 1 × Ear tip storage case

Product Details