Stereo Integrity

STEREO INTEGRITY 3-way Component Set

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Tweeter M22 M28 None

Midrange M3 Carbon M350 Carbon None

Midbass TM65 mkIV TM8 None

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Overview
Details
Accessories

Note:

"You can select a single speaker or choose different combinations of tweeters, midranges, and midbass drivers."

M22 Tweeter

The Stereo Integrity M22 is a high-performance 22 mm (0.9-inch) silk dome tweeter designed for audiophile car audio systems. It features an ultra-shallow mounting depth of 17 mm and an integrated rear chamber that allows a remarkably low resonant frequency for its compact size, ensuring clean high-frequency detail and seamless system integration.

Technical Specifications

Parameter	Specification
Tweeter Diameter	22 mm (0.9 inches)
Diaphragm Material	Natural Silk Dome & Surround
Magnet Structure	High-flux Neodymium
Voice Coil	Copper on a Kapton former
Nominal Impedance	4 Ohms
Resonant Frequency ($F_{s}$)	850 Hz
Sensitivity	90 dB @ 1W/1m
Frequency Response	1,600 Hz – 40,000 Hz
Power Handling (RMS)	100 Watts
Overall Outer Diameter	50 mm
Cutout Diameter	42 mm
Mounting Depth	17 mm

M28 Tweeter

The Stereo Integrity M28 is an upgraded, high-fidelity 28 mm (1.1-inch) silk dome tweeter built for premium car audio systems. It utilizes a machined powder-coated aluminum chassis, an integrated lotus-pattern stainless steel grille, and an engineered rear tuned chamber that drops the resonant frequency to 680 Hz while keeping a shallow 24 mm mounting depth.

Technical Specifications

Parameter	Specification
Diameter	28 mm
Diaphragm	Natural Silk
Magnet	Neodymium
Voice Coil	Copper/Kapton
Impedance	4 Ohms
$F_{s}$	680 Hz
Sensitivity	89 dB
Frequency Range	1,800–35,000 Hz
RMS Power	115W
Outer Diameter	59 mm
Cutout	52 mm
Depth	24 mm

M3 Carbon Midrange

The M3 Carbon is a high-end 3.5-inch wideband midrange loudspeaker. It features a lightweight, ultra-rigid woven carbon fiber cone and dust cap mated to a synthetic copolymer surround. Fueled by an N45 neodymium motor, its low-inductance engineering allows it to play all the way up to 20,000 Hz, completely bypassing the need for a separate tweeter if installed on-axis.

Technical Specifications

Parameter	Specification
Driver Size	3.5 inches (94.4 mm Overall OD)
Cone Material	Woven Carbon Fiber & Paper Sandwich
Magnet Structure	Shielded N45 Neodymium Cup Motor
Voice Coil	1-inch (25.4 mm) Copper voice coil on an Aluminum former
Nominal Impedance	4 Ohms (DC Resistance $R_{e}$: 3.4 Ohms)
Resonant Frequency ($F_{s}$)	126 Hz
Sensitivity	86 dB @ 1W/1m
Frequency Range	125 Hz – 20,000 Hz (Wideband)
Power Handling (RMS)	100 Watts
Linear Excursion ($X_{max}$)	+/- 3 mm
Cutout Diameter	72.5 mm (2.85 inches)
Mounting Depth	49.5 mm (1.95 inches)

M350 Carbon Midrange

The Stereo Integrity M350 Carbon is an elite 3.5-inch audiophile car audio midrange designed with a rigid carbon fiber dome diaphragm and a massive 2-inch copper voice coil. Built using an underhung motor topology, a compact neodymium cup motor, and an innovative internal spider configuration, it delivers excellent transient speed with a shallow mounting depth of just 36 mm.

Technical Specifications

Parameter	Specification
Driver Size	3.5 inches (94 mm Overall OD)
Diaphragm Material	Full Carbon Fiber Dome
Magnet Structure	Underhung Neodymium Cup Motor
Voice Coil	2-inch (50 mm) Copper on a Kapton former
Nominal Impedance	4 Ohms (DC Resistance $R_{e}$: 3.0 Ohms)
Resonant Frequency ($F_{s}$)	102.6 Hz (Large Signal) / 128.8 Hz (Small Signal)
Sensitivity	88.5 dB @ 1W/1m
Frequency Range	400 Hz – 20,000 Hz
Power Handling (RMS)	100 Watts
Linear Excursion ($X_{max}$)	4 mm one-way (70% BL)
Cutout Diameter	74 mm
Mounting Depth	36 mm

TM65 mkIV Midbass

The Stereo Integrity TM65 mkIV is a premium 6.5-inch high-performance car audio midbass loudspeaker. Engineered via Finite Element Analysis (FEA), it is specifically optimized for infinite baffle application inside vehicle doors. It features a shallow 58.3 mm (2.28-inch) mounting depth, a rigid pure aluminum cone, dual linearizing shorting rings, and a built-in cast aluminum rain shield to protect the motor from moisture.

Technical Specifications

Parameter	Specification
Driver Size	6.5 inches (167 mm Overall OD)
Cone & Dust Cap	Pure Black Anodized Aluminum
Surround Material	Tall Nitrile Butadiene Rubber (NBR)
Voice Coil	2-inch (50 mm) Copper wound on a CZA alloy former
Magnet Structure	Y35 Ferrite with Twin Shorting Rings
Nominal Impedance	4 Ohms (DC Resistance $R_{e}$: 3.2 Ohms)
Resonant Frequency ($F_{s}$)	61 Hz
Total Q-Factor ($Q_{ts}$)	0.65 – 0.67 (Optimized for door installs)
Linear Excursion ($X_{max}$)	7 mm one-way (@ 70% BL)
Power Handling (RMS)	150 Watts
Sensitivity (SPL)	88.8 dB @ 1W/1m
Frequency Response	65 Hz – 8,000 Hz (On-Axis)
Recommended Bandpass	65 Hz – 3,500 Hz (with a minimum 24 dB/oct slope)
Cutout Diameter	143 mm (5.63 inches)
Mounting Depth	58.3 mm (2.28 inches)

TM8 Midbass

The Stereo Integrity TM8 is a high-performance 8-inch car audio midbass loudspeaker engineered via Finite Element Analysis (FEA). It is specifically optimized with a high Qts (0.83) to deliver powerful, "pant-leg-slapping" midbass performance when mounted inside vehicle doors (Infinite Baffle alignment). It packs a massive 7 mm of linear excursion and an integrated rear cast-aluminum rain shield into an ultra-shallow mounting depth of just 58 mm (2.3 inches). [1, 2, 3, 4]

Technical Specifications

Parameter	Specification
Driver Size	8 inches (209 mm Overall OD)
Cone & Dust Cap	Pure Aluminum
Surround Material	Rubber
Voice Coil	2-inch (50 mm) Copper wound on a CZA former
Magnet Structure	Y35 Ferrite with Twin Shorting Rings
Nominal Impedance	Single 4 Ohms (DC Resistance $R_{e}$: 3.8 Ohms)
Resonant Frequency ($F_{s}$)	58 Hz
Total Q-Factor ($Q_{ts}$)	0.83 (Optimized for door infinite baffle use)
Linear Excursion ($X_{max}$)	7 mm one-way (@ 70% BL)
Power Handling (RMS)	150 Watts
Sensitivity (SPL)	90 dB @ 1W/1m
Frequency Response Range	25 Hz – 6,000 Hz (Anechoic) / 27 Hz – 7,000 Hz (In-Vehicle)
Recommended High-Pass	≥ 40 Hz or higher (with minimum 24 dB/octave slope)
Cutout Diameter	183 mm (7.2 inches)
Mounting Depth	58 mm (2.3 inches)

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STEREO INTEGRITY 3-way Component Set