Hertz MP 28.3 PRO
Mille Pro Series 1-3/8" tweeters
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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
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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.
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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.
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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.
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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
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Professional Integration: The faceplate features FEM-optimized geometry, specifically designed to maintain high linearity in off-axis factory locations like A-pillars or dashboards.
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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.
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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.
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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
| Feature | Specification |
| Speaker Size | 35 mm (1.38 in) |
| Voice Coil Ø | 28 mm (1.1 in) |
| Power Handling (Peak) | 180 Watts (Hi-Pass @ 1.8kHz - 12dB/Oct) |
| Power Handling (RMS) | 90 Watts |
| Impedance | 4-Ohms |
| Frequency Response | 1 kHz – 28,000 Hz |
| Sensitivity | 91 dB SPL |
| Mounting Depth | 0.53 in (13.5 mm) |
What’s In The Box?
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(2) Hertz MP 28.3 PRO Dome Tweeters (with 6" wire attached)
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(2) MPCX 2T.3 Crossovers
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(2) Flush mount trim rings and clamps
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(2) Angled surface mount housings
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(2) Factory mounting brackets and (2) Grilles
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Mounting hardware (screws, washers, speed clips, and zip ties)
What Others Are Saying
Eddie was great - SDCS installed a new head unit in my 2019 4Runner. He was honest in his opinions regarding the options I was considering. Pricing was also good - he was able to reuse some of my existing installation kit so I saved a bit of $$.Installation was clean and fast and he took the time to walk through the features before I left. Highly recommend!!
I had a great time at this shop! The staff really knows their stuff and took the time to explain the different options without pressure. Installation was quick, clean and professional. Everything looks factory and sounds amazing. The prices were fair and customer service was above and beyond. I highly recommend this place if you're looking for quality car audio and excellent service.
Those guys are really professional! I had a new Alpine floating head unit installed in my 2008 Mercedes, and it feels like a brand-new car. The installation was super clean. At first, the sound wasn’t the same as the factory stereo, but Kevin tuned it to be just as good—if not better—without adding any new amps. They even used my factory GPS antenna so I don’t have extra wires hanging out. On top of that, they matched the online price. Big thanks to Kevin and Eddie—highly recommended!
Kevin was awesome, he took his time and explained everything to me. I went in initially for a dash cam install and then decided to get a sub and amp installed as well. Both turned out great and will be returning if I need more work done.
Came In not knowing what to expect when suddenly my stereo stopped working. Spoke with Kevin in the front and after a VERY fast diagnosing they discovered my wiring was incorrect. After only about 45 minutes total being in the store I was on my way to the beach with a working stereo again! Thank you so much SDCARSTEREO
Highly recommend Kevin and the team at San Diego Car Stereo for any issues with aftermarket stereos. I bought a car with an aftermarket stereo and AC unit that wasn’t working properly—specifically, the heat wasn’t functioning due to an improper setup. I had several people look at it with no luck, and even the dealership basically refused to help because it was an aftermarket install. I came to Kevin and his team over the holidays feeling pretty defeated, but he was confident he could get the heat working before I headed back to a Colorado winter. Sure enough, he got it done.
FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.