JBL ST400 BLK 8 Ohms 150 Watts RMS Super Tweeter

JBL ST400 BLK 8 Ohms 150 Watts RMS Super Tweeter

Marsoni

M251S

$89.99

Get it in 3 business days with 1 day shipping. Friday, May 29

JBL ST400 BLK 8 Ohms 150 Watts RMS Super TweeterOverview The JBL ST400 BLK is a high performance super tweeter designed to deliver exceptional detail and clarity in high frequency reproduction without harshness. Ideal for professional audio applications such as PA systems, stage monitors, and various sound reinforcement setups, the ST400 BLK can be used individually in lower power systems or arrayed for increased coverage and sound pressure levels in higher power configurations. Features High Power

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Pack a lunch when you tackle this project boys.. its a doozy!! Month in going great so far definetly did what I purchased it to do. 2000 chevy with two p3 10s every bass drop sounded like an old firebird with loose trunk bolts. Threw this on the back walls floor underneath the speaker and the doors.. all that energy is now in the cab with me instead of getting lost in rattling metal!! Love it!!! Left a few pieces outside after I was done rained like hell on them so water doesnt hurt this stuff at all or direct sunlight in south mississippi.. good stuff pick this up and make them systems thud instead of rattle!!! You wont regret it!! I didn't!!

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Reviewed in the United States on June 11, 2026

Verified Purchase

Roseanna Boyce

Los Angeles, US

★★★★★ 5

Delivers a quieter ride

Size: 36 sqft

This works very well to put down road noise. The difference was immediate in my van. I was shocked it made such a difference.

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Reviewed in the United States on June 6, 2026

Verified Purchase

Dallas, US

★★★★★ 4

Reasonably priced sound deadening

Size: 18 sqft

Easy to cut with a carpet knife. I used a heatgun to make it stickier and more moldable. The foil isn't so thick that you risk cutting yourself like some Dynamat variants.

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Reviewed in the United States on March 12, 2026