top of page


Ultra Low Frequency Subwoofer

Originally designed for Super Live Audio as part of a VHD system, the VHD2.21 is voiced for both Live Music but also excels in the field of Club and Dance Music. In this situation, it works very effectively, operating down to 25Hz, alongside other VHD products, the smaller ES range, or as an incredible stand-alone subwoofer that can complement any other manufacturer's systems. Unlike traditional 21" subwoofers that are typically designed as more of an effect subwoofer, the VHD2.21 boasts tight, fast delivery and extreme dynamics, even at higher bass frequencies – qualities rarely found in such a large unit. One 2.21 can be driven by a single VHD3200. Whilst larger than KV2 Audio’s existing subwoofers, it still fits in with the company’s philosophy of providing maximum performance from within a compact footprint. There is also a flyable version available - VHD2.21R (KVV 987 496) with additional fixings and requirements for the VHD4.21 Flybar (KVV 987 398). 


  • Designed in response to calls for a high output ultra low-frequency subwoofer solution

  • Double 21" subwoofer with an input power handling capability of 3200W

  • Incredibly efficient, the 2.21 has a sensitivity of 106dB at one watt/one meter and can produce output levels in excess of 140dB

  • Frequency response from 28Hz through to 240Hz

  • A flyable version is available - VHD2.21R (KVV 987 496) with additional fixings and requirements for the VHD4.21 Flybar (KVV 987 398). 


Specially designed to add extreme low frequency-last octave extension with exceptionally high output to the VHD2.0 and VHD1.0 in conjunction with other VHD subwoofers

  • Large-scale live music and playback performance

  • Hire and Production

  • Large Concert venues

  • Cinema

  • Nightclub

  • Fixed installation

  • Easily incorporated into multiple system projects with ES and SL products.

System Acoustic Performance

Max SPL Long-term: 143dB (2 x VHD2.21)

Max SPL Peak: 146dB (2 x VHD2.21)

-3dB Response: 34Hz to 180Hz

-10dB Response: 28Hz to 240Hz

Impedance: 8Ω

Crossover Point: 60Hz to 120Hz

Low-Frequency Section

Acoustic Design: Bandpass with low port losses

Low-Frequency Amplifier Requirement: 3200W /1 x VHD2.21 (bridged VHD3200 amp.)

Woofer Size / Voice Coil Diameter / Design: 2 x 21" / 4.3"

Magnet Type: Neodymium Advanced Ventilated

Diaphragm Material: Epoxy Reinforced Cellulose

Speaker Input

Speaker Input: AP4 male


Cabinet Material: Baltic birch

Handles: 12

Color: Black (wear-resistant polymer coating)

Physical Dimensions

Height: 700 mm (27.55")

Width: 1080 mm (42.52")

Depth: 1200 mm (47.24")

Weight: 155 kg (341.7lbs)

Product code

  • KVV 987 249 - VHD2.21

  • KVV 987 496 - VHD2.21R

bottom of page