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The Kicker 49ST4TW is a single 1.5-inch (38 mm) Street Series bullet tweeter rated at 15–50W RMS, featuring a horn-loaded aluminium diaphragm and 108 dB sensitivity. It is designed for competition-level SPL car audio systems.
This listing is for one tweeter, sold individually.
Key specifications
- Size: 1.5" (38 mm) bullet tweeter, sold singly
- Diaphragm: horn-loaded aluminium
- Impedance: 4 ohms
- Recommended power: 15–50W RMS, 100W peak
- Frequency response: 3 kHz–20 kHz
- Sensitivity: 108 dB
- Crossover: in-line 6 dB high-pass
- Mounting: flush or surface with trim bezel, 73 mm diameter, 31 mm depth
ST 1.5" (38 mm) Street Series Bullet Tweeter 4 Ohm – Single (49ST4TW)
The Street Series bullet tweeters are built for competition-level SPL systems where clear, detailed vocals need to cut through high-output bass. They can be installed flush or surface-mounted using the included trim bezel. Field-replaceable rebuild kits (ST3RK/ST4RK) are available separately.
The horn-loaded aluminium diaphragm is a PA (Pro Audio)-style design optimised for extreme output and vocal clarity to complement very loud bass.
Features
- Horn-loaded aluminium diaphragm for extreme output efficiency
- Single-unit, PA (Pro Audio)-style tweeter for competition-level SPL systems
- Voiced for clear vocals to match high-output bass
- Front or rear mount options, plus trim bezel for surface mounting
- Spring-loaded terminals accept 16 AWG wire
- In-line 6 dB crossover included
- Field-replaceable voice-coil assembly available (ST3RK/ST4RK)
Explore the full range in Tweeters.
Specification
| Single Tweeter | 1.5" (38mm) |
|---|---|
| Dome Material | Aluminum |
| Design | Bullet |
| Impedance | 4 Ohms |
| Recommended Amp Power | 15-50 watts RMS |
| Peak Power Handling | 100 watts |
| Frequency Response | 3kHz-20kHz |
| Sensitivity | 108 dB |
| In-Line Crossover | 6dB, high-pass |
| Mounting Depth | 1-1/4" (31mm) |
| Mounting Diameter | 2-7/8" (73mm) |
| Thread Length | 1-3/16" (30mm) |
| Thread Diameter | 1-7/8" (48mm) |
What's Included
- Kicker 49ST4TW
Kicker
About the Kicker 49ST4TW
From our tech experts at CEN
Tweeters handling 50w RMS for adding high-frequency detail where the factory system has none, or for replacing tweeters in an existing component set.
Who it suits
Drivers whose system sounds dull at the top, and anyone building a front stage where the tweeter needs mounting on the pillar or dash rather than down in the door.
Our tech experts advise
Placement and aiming change the sound more than the tweeter itself, and they need crossing over properly so they are not asked to play too low. get in touch if you are unsure how they would integrate with your speakers. See car audio installation.
Explore the full Kicker range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Kicker
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Frequently Asked Questions
Q: How do I choose the right amplifier for my speakers or subwoofer?
A: Match the amplifier's RMS output per channel to the RMS handling of your speakers or subwoofer at the same impedance. The Specification tab lists the power figures. If in doubt, contact CEN with your setup and we will recommend a match.
Q: Is the Kicker 49ST4TW sold as a pair?
A: No. The 49ST4TW is sold as a single tweeter. Order two for a left and right pair.
Q: Does the 49ST4TW need a separate crossover?
A: No. It has an in-line 6 dB high-pass crossover. Its frequency response is 3 kHz to 20 kHz.
Q: How much power does the 49ST4TW handle?
A: Kicker recommends 15 to 50 watts RMS, with 100 watts peak power handling. Impedance is 4 ohms.
Q: Can CEN fit this tweeter for me?
A: Yes. CEN offers professional installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
