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- Silk dome with polymer laminated (Sonatex™) creates a perfect balance between weight
- The neodymium N42 magnet: a type of magnet with significantly higher performance than "standard" magnets
Exceptionally compact and powerful
superior noise rejection
Zapco ST-4X SQ III 4-Ch. Class AB Sound Quality Amplifier 10" Subwoofer - Silk dome with polymerThe ST X Series. Class A B and D Amplifiers. The Studio X line of amplifiers from Zapco was designed specifically for todays car audio market. The Studio X compact chassis makes it an easy fit in any car and even in motorcycle fairings. The square, low profile chassis also means it will be easy to trim out for a great looking installation so your system will look as awesome as it sounds. And speaking of sound This is a Zapco amplifier and sound is