The future of sound Made perfectly clear

The Kingdom of Perfectly Clear Sound


The Kingdom of Perfectly Clear Sound




The VHD 1.21 is a single 21”, Low Q band-pass subwoofer system that adds extension and weight for applications where you want to feel as well as hear very high definition audio. Working down to 23Hz with an efficiency for two boxes of 102dB it shares the same footprint as the other VHD subwoofers in a compact lightweight easily transported package. Alongside the VHD 2.15 it forms part of a remarkable five way active system.



  • Subwoofers for large and medium -sized live music touring applications alongside VHD 2.15 / VHD 2.0 / VHD 1.0.
  • Very high quality fixed installations working as the above.
  • Professional portable PA systems for large format AV speech and multimedia playback.
  • Very High Definition dance systems providing the ultimate ultra low frequency reproduction for clubs and events.




System Acoustic Perfomance

Max SPL Long-Term 135dB (2x VHD 1.21)
Max SPL Peak 137dB (2x VHD 1.21)
-3dB Response 29Hz ÷ 60Hz
-10dB Response 23Hz ÷ 60Hz
Crossover Point 60Hz


​​Low Frequency Section

Acoustic Design Large chamber low Q
band pass
Subwoofer Amplifier 800W / 1x VHD 1.21
Requirement (VHD 3200 amp.)
Woofer Size / Voice Coil 21″ / 4″ Inside Outside
Diameter / Design
Diaphgram Material Epoxy Reinforced
Magnet Type Ferrite


Speaker Input

Speaker Input EP4


Speaker Output

Speaker Output EP4


Product Number

KVV 987 249VHD2.21


Physical Dimensions

Height 700mm (27.56″)
Width 1080mm (42.52″)
Depth 1200mm (47.24″)
Weight 145kg (319.66lbs)