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Fostex T90A Horn Super Tweeter


Fostex T90A Horn Super Tweeter Review

The Fostex T90A is an external top-mount horn super tweeter with a frequency response that extends to 35 kHz. The T90A super tweeter has a very high sensitivity, rated at 106dB / 1W / 1m. The nominal impedance of the tweeter is 8 ohms and the T90A tweeter is very easy to drive with small amplifiers. The horn super tweeter uses large 100g alnico magnet. You can get a good idea of the build quality just by holding the tweeters which weigh in at a hefty 800 g (1.75 lbs) each. The Fostex T90A horn super tweeter is manufactured in Japan.

Fostex T90A Horn Super Tweeter

Photograph 1: Fostex T90A Horn Super Tweeter

The Fostex T90A Horn Super Tweeter came neatly packaged in a cardboard box. Included with the horn super tweeter is a well constructed top-mount wooden stand.

Fostex T90A Horn Super Tweeter and Top-Mount Stand

Photograph 2: Fostex T90A Horn Super Tweeter and Top-Mount Stand

The build quality of the Fostex T90A horn super tweeter is superb. The super tweeter is "airy" and very crisp with a frequency response that extends way out beyond the audible range. Provided that a crossover point in-excess of about 7 kHz is used, the performance is excellent. If you are looking for a high performance super tweeter, the T90A will do the trick. Be sure to experiment with the positioning of the super tweeter as this will affect the sound. If you need a tweeter which mounts to an enclosure, or a lower cost tweeter for rear firing, consider the Fostex FT96H horn super tweeter.


Fostex T90A Horn Super Tweeter Frequency Response and Impedance

Fostex T90A Horn Super Tweeter Frequency Response and Impedance

Figure 1: Fostex T90A Horn Super Tweeter Frequency Response and Impedance

From the Fostex T90A datasheet, a crossover point of 7 kHz or greater is recommended. For a crossover, we have had good results using a simple first-order crossover (one capacitor) operating in the 10 to 14 kHz range. The tweeter sensitivity is very high, so you cab use an L-Pad attenuator to match the tweeter level to your speakers.


Datasheet - Fostex T90A Horn Super Tweeter


More Horn Super Tweeters

Links to more horn super tweeters.