SA-TR09 - 2.75 Inch Aluminum Car Audio Bullet Tweeter High Compression 4 Ohm
The SA-TR09 bullet tweeter delivers the high-frequency punch that car audio enthusiasts need when their system lacks crisp highs. This 2.75-inch aluminum compression driver handles the detailed treble reproduction that makes vocals cut through road noise and brings definition to your music's upper frequencies.
Built around a 1-inch Kapton voice coil and 5.40-ounce magnet assembly, this tweeter pushes 120 watts RMS with 101 dB sensitivity for efficient high-frequency output. The aluminum construction and compression design focus sound energy for controlled dispersion, preventing the harsh, scattered highs that plague cheaper tweeters.
The 1.5kHz to 20kHz frequency response covers the critical range where vocals, cymbals, and instrumental detail live. At 4 ohms impedance, it pairs easily with most car audio amplifiers and crossover networks. The die-cast aluminum basket provides thermal management during high-volume playback sessions.
Install these in custom door panels, kick panels, or A-pillar pods for front-stage imaging in competition builds or daily drivers where you want professional-level high-frequency reproduction. The compact 1.42-inch mounting depth fits tight installation spaces while the 2.75-inch cutout works with standard tweeter mounting hardware.
Standard speaker wire connections make wiring straightforward - just ensure your crossover network or amplifier's built-in filter protects the tweeter from low frequencies. Backed by Seismic Audio's warranty and fast shipping, the SA-TR09 brings pro-grade tweeter performance to your car audio build.
Technical Specifications
| Spec | Value |
|---|---|
| Model | SA-TR09 |
| Type | 2.75" High-Compression Aluminum Bullet Tweeter |
| Power (RMS) | 120 Watts |
| Power (Peak) | 240 Watts |
| Voice Coil | 1" Kapton |
| Impedance | 4 Ohms |
| Magnet | 5.40 Ounce |
| Sensitivity | 101 dB |
| Frequency Response | 1.5kHz - 20kHz |
| Basket | Die-Cast Aluminum |
| Outer Diameter | 3.77" |
| Cutout Diameter | 2.75" |
| Mounting Depth | 1.42" |
| Recommended For | Car audio systems, competition builds, custom installations |
Frequently Asked Questions
What crossover frequency should I use with the SA-TR09?
Cross this tweeter over at 3kHz or higher for best performance. The 1.5kHz lower limit allows flexibility, but crossing at 3-4kHz protects the tweeter from midrange frequencies while ensuring clean high-frequency reproduction. Use a 12dB/octave or steeper slope to prevent damage from lower frequencies.
Will this tweeter work with my factory car stereo?
The SA-TR09 requires an external amplifier and crossover network to perform properly. Factory head units lack sufficient power and crossover filtering for compression tweeters. You'll need a dedicated amplifier channel and either an active crossover or passive crossover network to protect the tweeter from harmful low frequencies.
How does the SA-TR09 compare to dome tweeters?
Bullet tweeters like the SA-TR09 provide more focused, directional sound compared to dome tweeters. This makes them ideal for precise imaging in competition systems or installations where you want controlled high-frequency dispersion. Dome tweeters offer wider dispersion but less focused sound projection.
What gauge speaker wire do I need for installation?
Use 16-gauge or thicker speaker wire for runs under 20 feet, 14-gauge for longer runs. The tweeter's 4-ohm impedance and 120-watt power handling don't require heavy wire, but proper gauge ensures minimal power loss. Quality wire with secure connections prevents high-frequency detail loss.
Can I mount these in factory tweeter locations?
The 2.75-inch cutout diameter may require modification of factory locations, as most factory tweeters use smaller mounting holes. The 1.42-inch mounting depth fits most door panels and dash locations, but verify clearance behind your chosen mounting point. Custom mounting pods or brackets may provide better installation options.
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