STX Audio STX-55TW 3.4" Super Tweeter

The STX Audio STX-55TW is a 3.4-inch super tweeter designed to add dedicated high-frequency output to a car or pro-audio speaker system. It is intended for systems that need more presence and definition in the upper-frequency range than full-range speakers alone may provide. Its 4-ohm nominal impedance supports integration with compatible car-audio amplification and speaker networks.

This tweeter is aimed at enthusiasts building custom vehicle audio systems, including high-output setups that need a separate driver for treble detail. The listed 105 dB sensitivity supports efficient output from relatively modest amplifier power. Its stated frequency range of 2 kHz to 18 kHz focuses its role on upper-midrange and high-frequency reproduction.

A titanium diaphragm is used for the moving diaphragm, paired with a CCAW voice coil. This combination is intended for the fast, controlled operation required of a high-frequency driver. The STX-55TW is rated for up to 800 watts maximum power handling; an RMS power rating is not confirmed.

The compact 3.4-inch format is suited to custom panels, speaker pods, and other locations where a dedicated tweeter can be positioned toward the listening area. It can complement midrange speakers or other drivers in a multi-way system rather than replace them. Proper frequency division is important because this is a super tweeter, not a full-range speaker.

For system upgrades, the STX-55TW can be used where clearer cymbals, vocal articulation, and upper-frequency detail are desired. Its listed 7.9-ounce magnet supports the driver assembly, while its metallic appearance coordinates with many custom-install applications. The standard STX-55TW listing is for one tweeter; separate paired listings are also sold under different package SKUs.

Key Features

• 3.4-Inch Super Tweeter: Adds a dedicated high-frequency driver to a multi-speaker audio system.
• 4-Ohm Impedance: Matches many compatible car-audio amplifiers and speaker networks.
• 105 dB Sensitivity: Supports efficient high-frequency output in high-output system designs.
• Titanium Diaphragm: Provides a rigid diaphragm material for treble reproduction.
• CCAW Voice Coil: Uses copper-clad aluminum wire in the voice-coil assembly.
• 800W Maximum Rating: Indicates the listed maximum power-handling specification, not RMS power.

Design & Installation

The STX-55TW uses a titanium diaphragm and CCAW voice coil in a compact super-tweeter format. It has a listed metallic finish and a 7.9-ounce magnet. Product-listing dimensions are 2.5 x 4 x 4 inches, with a listed item weight of 0.66 kg.

Install the tweeter in a secure location aimed appropriately for the listening area, using a mounting arrangement suited to the vehicle or custom panel. Connect it by wire with correct polarity and pair it with a compatible amplifier or speaker circuit. Because no included crossover specifications are confirmed, use an appropriately selected high-pass crossover or active crossover setup to protect the tweeter from low-frequency content.