Hertz MP 28.3 PRO

Hertz MP 28.3 PRO | Mille Pro Series 1.38" Tweeters

The Hertz MP 28.3 PRO (MFR #: MP 28.3) is an advanced 1.38-inch (35 mm) tweeter set that inherits flagship technology from the Mille Legend series. Engineered for listeners who demand a life-like soundstage, these tweeters feature an oversized 28 mm voice coil and a specialized rear acoustic chamber. This design allows them to reach an exceptionally low resonance frequency of 900 Hz, providing a smoother transition to mid-bass drivers and a more stable stereo image on your dashboard.

Product Highlights

• 28 mm Tetolon® Dome: The MP 28.3 PRO utilizes a Tetolon fiber dome optimized through FEA (Finite Element Analysis) simulations. This material offers excellent off-axis dispersion, ensuring a natural and detailed high-frequency response even when the tweeters aren't pointed directly at you.

• Damped Rear Chamber: Unlike standard tweeters, this model features an extended rear chamber filled with natural fiber damping material. This reduces the resonance frequency (Fs) to 900 Hz, allowing for lower crossover points and a more robust mid-high frequency performance.

• Double Neodymium Magnet: The high-density double neodymium motor is optimized for maximum field symmetry. This results in exceptional transfer efficiency and fast response to musical transients, keeping your audio crisp and distortion-free.

• CCAW Voice Coil: The Copper Clad Aluminum Wire (CCAW) voice coil provides a lightweight yet stiff moving assembly. This balance is critical for achieving a high-frequency extension of up to 28 kHz, which is a record for a tweeter with a voice coil of this size.

Key Features

• Professional Integration: The faceplate features FEM-optimized geometry, specifically designed to maintain high linearity in off-axis factory locations like A-pillars or dashboards.

• Separate High-Pass Crossovers: The included MPCX 2T.3 crossovers are ultra-compact for easy installation and feature a level adjustment switch (0, -2dB) to help you fine-tune the treble balance in your vehicle.

• Versatile Mounting: Hertz provides a wide array of accessories, including angled surface supports, flush-mount rings, and factory mounting brackets, ensuring a clean "stealth" installation in almost any car.

• High Sensitivity: With a 91 dB sensitivity rating, these tweeters are highly efficient, though they perform best when paired with a high-quality aftermarket amplifier.

Technical Specifications

What’s In The Box?

• (2) Hertz MP 28.3 PRO Dome Tweeters (with 6" wire attached)

• (2) MPCX 2T.3 Crossovers

• (2) Flush mount trim rings and clamps

• (2) Angled surface mount housings

• (2) Factory mounting brackets and (2) Grilles

• Mounting hardware (screws, washers, speed clips, and zip ties)

• Ships within 1–3 business days from our warehouse
• Tracking included with every order
• Free 30-day returns if it doesn’t work for your setup

• 2-year manufacturer warranty
• Authorized dealer guarantee
• Real installer-backed support before and after purchase