Your browser is out-of-date!

Update your browser to view this website correctly. Update my browser now


Grimani Systems Launches the IS-21 Infrasonic Subwoofer

Offers a shallow form factor, multiple mounting options, and bass extension down to 15 Hz.

Grimani Systems IS-21 subwoofer

Grimani Systems has announced the latest addition in its custom integration product line — the IS-21 subwoofer. Pushing the audio experience to new depths, this Infrasonic subwoofer fulfills the market desire for tactile and immersive bass.

The IS-21 subwoofer boasts a powerful combination of precision engineering, advanced materials, and state-of-the-art DSP technology, resulting in stunning bass reproduction in a 118-pound package.

“The IS-21 goes down a full octave below most subwoofers and brings visceral excitement to music, movies, and games,” says Anthony Grimani, co-founder of Grimani System. “This innovative product truly adds to the immersive audio experience.”

Key Features

  • Active amplified 21-inch DSP infrasonic high-performance subwoofer
  • High dynamics
  • Bass extension down to 15 Hz
  • Shallow form factor
  • Exceptional dynamics and finesse
  • Integration-friendly
  • Calibration, diagnostics, and 24/ 7 monitoring over IP
  • Digital signal processing EQ

Designed with versatility in mind, this subwoofer includes various mounting options:

  • On-wall and concealed by screen or stretched fabric: Four shock-mount L Brackets
  • In-room, visible: Shock absorbing rubber feet
  • In-wall: Perimeter flanges and fabric-covered grille

Basic Specifications

  • SPL max burst CTA2010: 124 dB
  • 15 Hz to 300 Hz bandwidth
  • 21-inch driver
  • 4800-watt outboard amplifier (for two units)
  • 23.5 inches W x 46 inches H x 16 inches D
  • 118 pounds

For more information, visit