







🔊 Restore your sound, reclaim your ride’s vibe!
The Pioneer UD-RP401PRO Repair Kit is a precision-engineered replacement diaphragm kit designed exclusively for the TS-B401PRO 4" P.R.O. Series tweeter. Featuring a premium titanium diaphragm, a pre-soldered high-pass filter capacitor, and an alignment pin, this kit enables hassle-free, at-home repairs that restore optimal audio performance. Perfect for car audio enthusiasts seeking a durable, professional-grade solution to revive their tweeters and maintain crystal-clear sound quality.





| ASIN | B0CHLHDBXW |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #1,380 in Speaker Repair Products |
| Color | Car Speaker Repair Kit |
| Compatible Devices | Car, Truck, Motorcycle |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.5 4.5 out of 5 stars (153) |
| Date First Available | October 1, 2023 |
| Impedance | 4 Ohms |
| Included Components | (1) High-pass filter capacitor (pre-soldered), (1) Titanium replacement tweeter diaphragm & voice coil, Owner's Manual, Warranty Card |
| Is Waterproof | False |
| Item Weight | 0.96 ounces |
| Item model number | UD-RP401PRO |
| Manufacturer | Pioneer |
| Material | Titanium |
| Model Name | PRO Series |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Product Dimensions | 0.13"D x 2"W x 2"H |
| Recommended Uses For Product | For Vehicles |
| Set Name | Pioneer PRO Series |
| Shape | rectangular prism |
| Speaker Size | 4 Inches |
| Speaker Type | Tweeter |
| Special Feature | Stereo Pairing |
| Specific Uses For Product | Vehicles |
| Style | Repair Kit |
| Subwoofer Connectivity Technology | Wired |
| Surround Sound Channel Configuration | 2.0 |
| Tweeter Diameter | 4 Inches |
| UPC | 884938510868 |
| Unit Count | 1.0 Count |
| Warranty Type | Limited |
| Wireless Communication Technology | No Wireless Communication Technology |
L**S
Speakers
My husband loved them for his truck, I recommend them, they have great sound
V**E
TS-B401PRO Pioneer 4" Tweeter
These tweeters are just nasty! Paired with a pair of D4S 65v2 and D4S JP84 amp. I still need to configure bridged to test the amplifier's performance. This chuchero box sounds wonderful and I'm still tuning on it. Pros: build quality, freq. response, rms capacity Cons: none for me I bet once it's bridged, it's going to stay that way. Including 2 10" DD Audio Redline 10" subs + DD Audio D1100 monoblock 1100w RMS amp. *** 10/23/2024 *** bridged the D4S JP84 amp @ 4Ohm 280w rms 2 channel and the 401Pro tweeters have fantastic performance. The D4S 65 v2 speakers have such a frequency response the tweeters are almost unnecessary. The audio system sound fabulous! It's like butter! *** 3/15/2025 *** Purchased a second JP84 amplifier to power these super tweeters. The JP84s consistently dyno at 300w RMS bridged @ 4Ohm so each tweeter will be receiving 150w RMS @ 4Ohm, as will each of the new 6.5" marine grade speaker upgrades (D4S HexiCone NEO HexiPRO cs65 6.5" carbon fiber speakers). Definitely increasing my -dBi!
N**6
Great build and sound quality at a reasonable price
Pioneer TS-B351PRO 3.5" Bullet-type 4 ohm tweeter (sold as pair), replaceable voice coil capability High-quality alluminum construction and great sound. I had been eyeing these up for a upcoming project (custom-built concert-type speakers) for my backyard entertainment area. Ended up purchasing 2 pair of them during Amazon shopping days for a really good price. These are an improvement over the last model (TS-B350PRO), as they made the new TS- B351PRO with a replaceable voice coil for people who like to push the power limits of these tweeters. I plan on purchasing other P.R.O. series 4" tweeters, 6.5" mids, 8" woofers, and 12" subs for the rest of the project. I exclusively use Pioneer for all my audio. Please keep in mind, the P.R.O. series speakers were designed with more of an emphasis on power & SPL over sound quality. Don't get me wrong, the sound quality is very good though. It will do fine for this project. For my vehicles however, I prefer the route of sound quality over SPL, so I use their Z & PRS series components.
R**Z
Works perfectly
No es and good
G**E
Better than I expected... tho I love they ints
Imo... they better than the 4in. They sound cleaner n the highs are crisper. I love them
D**Y
Muy buenas y bien equilibradas
A**N
Sound good but...
There is a capacitor you have to Hook up when you connect your positive and negative wire leads. Had a system for a very long time then added these and now there's a pop when I turn on my vehicle that was not there before.
T**S
clear sound.
speakers sound good for size.
I**N
The Pioneer TS-351 Pro delivers excellent clarity for the price. The highs are crisp without being harsh, and vocals come through cleanly even at higher volumes. It’s well-built, compact, and easy to fit into most setups. Don’t expect bass from this speaker; it shines best when paired with a good subwoofer or mid-bass driver. What I really liked is that Pioneer supplies a capacitor right in the box. This helps protect the tweeter and ensures only the higher frequencies pass through, so you’re getting clean sound and a safer, longer-lasting performance. Overall, a great value for crisp highs and quality build.
L**N
Se escuchan muy bn los recomiendo
B**M
I'm not saying because they are too good and I need more.
J**S
Vino con detalles estéticos de rayones,sin protección y la caja del.envoltorio maltratada,como de mala conservacion,solo espero q funcione bien,sobre todo por lo caro que cuesta
P**O
Muy buenos buenísimos
Trustpilot
2 weeks ago
1 month ago