Name: Pioneer TS‑B401PRO
SKU: TS-B401PRO
Availability: InStock

Description

Pioneer TS‑B401PRO

The TS‑B401PRO is a 4‑inch (≈ 103 mm) bullet‑style tweeter from Pioneer’s P.R.O. (Reference for Open Show) series, designed for high‑SPL installations and serious audio output. It features a titanium diaphragm and an aluminium die‑cast chassis engineered for durability and clarity under high power. With a nominal (continuous) power handling of 300 W RMS and a maximum (peak) input of 600 W, it delivers extreme output levels. The sensitivity is rated at 106 dB (1W/1m) and the impedance is 4 ohms, while the frequency response spans approximately 2,500 Hz to 22,000 Hz.

Specifications

Product Performance

Specification	Value
Continuous Power Handling (RMS)	300 W
Maximum Peak Power Handling	600 W
Nominal Impedance	4 Ω
Sensitivity (1W/1m)	106 dB
Frequency Response	2,500 Hz – 22 kHz
Crossover Frequency	2,500 Hz
System Type	Bullet Tweeter

Features

Specification	Value
Cut Out Dimensions	3-3/4″
Mounting Depth	2-5/8″
Outer Diameter	4-5/8″
Tweeter Dimensions	4.57″
Woofer Dimensions	4″

Materials

Specification	Value
Diaphragm Material	Titanium (Tweeter)
Magnet Material	Ferrite
Magnet Weight	431 g / 15.2 oz

About The Product

The Pioneer P.R.O. (Pioneer Reference for Open Show) series of speakers is designed specifically for those looking to produce serious sound pressure levels. Inspired by Pioneer’s history of record-breaking SPL competition, the new P.R.O. Series line of speakers is constructed with the street enthusiast in mind. Emphasizing efficiency and power handling, the P.R.O. series lineup consists of bullet tweeters, mid-bass drivers, and a subwoofer that can be mixed and matched to deliver impressive output without requiring a significant investment.

Pioneer P.R.O. Series

The Pioneer P.R.O. (Pioneer Reference for Open Show) series is designed for enthusiasts seeking serious sound pressure levels. Inspired by Pioneer’s history of record-breaking SPL competitions, this lineup features bullet tweeters, mid-bass drivers, and subwoofers that can be mixed and matched for impressive output without a large investment.

What is Pioneer P.R.O.

In the early 2000s, SPL competitions such as “dB drag racing” became popular in the U.S., with winners reaching around 150 dB by 2003. Pioneer broke the world record in 2004 with 173.0 dB and again in 2005 with 180.5 dB. Under the sponsorship of the IASCA (International Auto Sound Challenge Association), the “OPEN SHOW” SPL competition emerged. The acronym P.R.O. (Pioneer Reference for Open Show) comes from this competition. These speakers are suitable for competitive use or casual outdoor enjoyment, such as tailgating or parties.

Large and Heavy

Designed for open show car audio systems, these speakers deliver phenomenal maximum power and high efficiency, producing impressive SPL while allowing hours of musical enjoyment. The heavy magnet, large aluminum voice coil, and robust basket structure provide excellent power handling and heat dissipation.

Titanium and Aluminum

The horn-loaded tweeter features a titanium diaphragm paired with a high-quality die-cast aluminum basket and center bullet. This combination maintains accuracy under high power and improves heat dissipation, ensuring consistent performance during extended use.