Grimani IS-21 Infrasonic: 21-inch subwoofer with a 2.4 kW external amplifier

Subwoofers are equipped with drivers of varying sizes, typically ranging from 8 to 15 inches in diameter. It is uncommon to come across subwoofers with larger speakers measuring 18 inches in diameter. However, Grimani Systems has pushed the boundaries by introducing a subwoofer featuring a massive 21-inch driver.

The new Grimani IS-21 Infrasonic subwoofer comes with an external amplifier boasting a powerful 2,400 watts. The manufacturer claims that this model is capable of delivering “exceptionally deep and exciting bass” from 15 Hz. This new product integrates advanced engineering solutions, modern materials, and digital sound processing technologies. Along with the amplifier, the external unit includes DSP, which incorporates a subwoofer sound calibration system based on the acoustic parameters of the room, among other features. This bass module offers the necessary functionality for such a powerful and large subwoofer.

The Grimani IS-21 Infrasonic subwoofer, complete with an external amplifier, has a suggested retail price of $15,000.

Mounting options for the Grimani IS-21 Infrasonic subwoofer:

Wall mounting: hidden behind a screen or stretched fabric, four L-shaped brackets with shock absorber included for mounting

In the wall: flanges around the perimeter and a grid covered with fabric

In the room: shock-absorbing rubber feet are provided for placement on the floor

Technical characteristics of the Grimani IS-21 Infrasonic subwoofer:

Speaker size: 21 inches (53 cm)

Amplifier (external) with DSP : 2,400 W for one unit, 4,800 W for two units

Maximum sound pressure (max. impulse CTA2010): 124 dB

Frequency range: 15 to 300 Hz

Dimensions (H x W x D): 117 x 60 x 41 cm

Weight: 53.5 kg