40mm HiFi Headphone Speaker Driver Unit 112dB 32 Ohm DIY

40mm HiFi Headphone Speaker Driver Unit — Crystal-Clear Audio for DIY Builds & Repairs

Upgrade or restore your favorite headphones with this precision-engineered 40mm HiFi Headphone Speaker Driver Unit. Delivering an impressive 112dB sensitivity at 32 Ohms impedance, this driver unit reproduces rich, detailed sound across the full frequency range — making it the ideal choice for DIY audio enthusiasts, repair technicians, and audiophiles alike.

Key Specifications

• Driver Diameter: 40mm (1.57 inches)
• Impedance: 32 Ohms
• Sensitivity: 112dB
• Materials: Metal & Plastic construction for durability and acoustic performance
• Quantity: 2 pieces per set (L + R stereo pair)

Wide Compatibility

This versatile 40mm speaker driver unit is compatible with a broad range of popular headphone models, including:

• Bose: QC2, QC3, QC15, QC25, QC35, AE2, OE2, 700
• Beats: Solo 2, Solo 3, EP (Wired)
• Razer: Kraken 7.1
• AKG: K55, K420, K430, K450
• Most standard 40mm driver headphone housings

Why Choose This Speaker Driver Unit?

• 🎵 High-Fidelity Sound: 112dB sensitivity ensures clear, dynamic audio output
• 🔧 DIY & Repair Ready: Perfect for replacing worn-out or damaged drivers without replacing the entire headset
• ⚙️ Durable Build: Metal and plastic hybrid construction balances structural integrity with lightweight design
• 🎧 Universal Fit: Standard 40mm size fits a wide variety of over-ear and on-ear headphone shells
• 💡 Great for Builders: Ideal for custom DIY headphone projects where high-quality drivers are essential

Perfect For

Whether you're a seasoned audio engineer, a headphone repair hobbyist, or a DIY electronics enthusiast building your own custom pair of cans, this speaker driver unit delivers the performance and reliability you need at an excellent value.

For more information on headphone audio standards and how drivers affect sound quality, visit the National Institute of Standards and Technology (NIST) for consumer electronics guidance.

Frequently Asked Questions

Q: What headphone models is this 40mm HiFi speaker driver unit compatible with?

A: This 40mm, 32 Ohm driver unit is compatible with a wide range of popular headphone models including Bose QC2, QC3, QC15, QC25, QC35, AE2, OE2, and 700 series; Beats Solo 2, Solo 3, and EP Wired; Razer Kraken 7.1; and AKG K55, K420, K430, and K450. It also fits most standard over-ear or on-ear headphone housings designed for a 40mm driver.

Q: What does 112dB sensitivity mean for a headphone driver unit?

A: Sensitivity (measured in decibels, dB) indicates how efficiently a driver converts electrical signal into sound. At 112dB, this driver unit produces loud, clear audio even with lower-powered sources, making it excellent for both DIY custom builds and headphone restoration projects.

Q: How many driver units are included in one purchase?

A: Each purchase includes 2 speaker driver units (one left, one right), giving you a complete stereo pair for a full headphone repair or DIY build.

Q: What materials is the 40mm headphone driver unit made from?

A: The driver unit is constructed from a combination of metal and plastic components. The metal elements provide structural rigidity and acoustic resonance characteristics, while the plastic components keep the overall weight low — ideal for comfortable, long-wearing headphone builds.

Q: Is this driver unit suitable for complete DIY headphone builds from scratch?

A: Yes! With its standard 40mm diameter, 32 Ohm impedance, and high 112dB sensitivity, this speaker driver unit is a popular choice for audiophile DIY headphone projects. It fits a wide range of custom headphone cups and shells available in the hobbyist market.