Stereo Integrity M350 3.5" Carbon Midrange (Pair) | 100W RMS

The Stereo Integrity M350 Carbon Midrange is a high fidelity 3.5 inch midrange speaker pair engineered for exceptional clarity, wide bandwidth, and advanced thermal handling in premium car audio systems. Designed using cutting edge motor geometry and materials, the M350 delivers smooth midrange response with impressive excursion capability, making it ideal for sound quality focused installations.

Built around a full carbon fiber dome diaphragm and a massive 2 inch diameter voice coil, this midrange speaker redefines what a compact driver can achieve in both output and precision.

Advanced Carbon Fiber Dome for Accuracy and Strength

Unlike traditional cone style midrange drivers, the M350 uses a rigid carbon fiber dome as the radiating surface. This design provides outstanding stiffness to weight ratio, reducing distortion while maintaining fast transient response and excellent detail across the vocal and instrumental range.

The result is a clean, natural presentation with a recommended operating bandwidth of approximately 400 Hz to 5000 Hz, allowing seamless integration with tweeters and midbass drivers.

Oversized 2 Inch Voice Coil for Superior Power Handling

A full 2 inch copper voice coil dramatically increases thermal capacity compared to typical 3.5 inch drivers. Wound on a lightweight Kapton former to reduce eddy currents, this large coil allows the M350 to handle 100 watts RMS with excellent heat dissipation and reliability during extended listening sessions.

Unique Internal Spider Design for Smooth Linear Excursion

The suspension system uses an innovative configuration where the spider is positioned inside the voice coil former. This allows greater linear control and smooth travel, supporting approximately 3.6 mm one way linear excursion while maintaining precise alignment of the moving assembly.

An underhung motor topology increases magnetic strength and sensitivity while improving linearity across the driver’s operating range.

Neodymium Motor and Faraday Ring for Precision Control

The compact Neo motor assembly incorporates a copper pole sleeve and a solid aluminum Faraday ring to reduce inductance, improve control, and maintain consistent performance across the frequency spectrum. These features contribute to improved detail, reduced distortion, and better dynamic response.

Shallow Design for Flexible Installation

With a mounting depth of only 36 mm, the M350 is approximately 30 percent shallower than earlier designs, making it easier to install in tight factory locations, custom door panels, and dash configurations.

A minimalist cast aluminum basket provides rigidity while keeping weight low and includes a clean terminal layout with direct lead connections for easy wiring.

Key Features

• Carbon fiber dome diaphragm for high strength and low distortion

• Large 2 inch copper voice coil for increased thermal handling

• Underhung motor design for improved sensitivity and control

• Internal spider configuration for smooth linear excursion

• Neodymium motor structure with copper sleeve and Faraday ring

• Cast aluminum basket for rigidity and reduced resonance

• Shallow mounting depth for versatile installation

• Designed using advanced FEA modeling for optimized performance

Specifications

General

• RMS Power Handling: 100 Watts

• Impedance: 4 Ohms

• Sensitivity: 88 dB

• Frequency Response: 400 Hz to 20000 Hz

Dimensions

• Overall Diameter: 94 mm

• Cutout Diameter: 74 mm

• Mounting Depth: 36 mm

Thiele Small Parameters

• Fs: 115 Hz

• Qts: 0.21

• BL: 8.66 Tm

• Mms: 8.3 g

• Xmax: 3.6 mm one way

• Xmech: 6 mm one way

Materials

• Cone Material: Carbon Fiber

• Surround Material: Synthetic Rubber

• Voice Coil: Copper on Kapton former

• Magnet: Neodymium

For enthusiasts seeking a high performance 3.5 inch midrange speaker that combines advanced engineering, shallow installation depth, and audiophile level clarity, the Stereo Integrity M350 Carbon Midrange delivers precision sound and durability for premium car audio systems.