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VHD1.21 - Ultra Low Frequency Enclosure

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 VHD2.16, it forms part of a remarkable five way active system.

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  • VHD1.21
  • VHD1.21
  • VHD1.21
  • VHD1.21
  • VHD1.21
  • VHD1.21
  • VHD1.21
  • VHD1.21
  • VHD1.21
 

VHD1.21 Technical Data Sheet

 
 
VHD1.21Overview

Applications

Specifically designed to add extreme low frequency extension to the VHD2.0 and VHD1.0 in conjunction with other VHD subwoofers

  • Live performance
  • Fixed installation
  • Cinema
  • Theatre
 

Product code

  • KVV 987 080 - VHD1.21
 
 

Features

  • Professional, Baltic birch construction with highly resistant polymer coating
  • Very High Definition ultra low frequency reproduction
  • 135dB sustained output / 137dB peak (using 2 units of VHD1.21)
  • Large-chamber bass reflex low Q bandpass design
  • Single 21" low frequency driver with 4" (100 mm) inside/outside, epoxy baked, high temperature voice coil assembly and carbon fibre reinforced cone assembly
  • Proprietary side handles (6) for simplified handling and carrying
  • High impact low friction feet, allowing lock- in to other VHD cabinets and easy cabinet movement
  • Front locking aluminium VHD wheel boards with wraparound hardwood bumpers
  • Weather proofing option and special paint finishes available on request
 

Applications

Specifically designed to add extreme low frequency extension to the VHD2.0 and VHD1.0 in conjunction with other VHD subwoofers

  • Live performance
  • Fixed installation
  • Cinema
  • Theatre
 

Product code

  • KVV 987 080 - VHD1.21
 
 

System Acoustic Performance

Max SPL Long-term135dB (2x VHD1.21)
Max SPL Peak138dB (2x VHD1.21)
-3dB Response29Hz to 60Hz
-10dB Response23Hz to 60Hz
Impedance8Ω
Crossover Point60Hz

Low Frequency Section

Acoustic DesignLarge chamber low Q band pass
Low Frequency Amplifier Requirement800W /1x VHD1.21 (VHD 3200 amp.)
Woofer Size / Voice Coil Diameter / Design21" / 4" Inside Outside
Diaphragm MaterialEpoxy Reinforced Cellulose
Magnet TypeNeodymium

Speaker Input

Speaker Input AP4 male

Speaker Output

Speaker OutputAP4 female

Cabinet

Cabinet MaterialBaltic birch
Handles6
Color"Orange peeled" Matt Black or any RAL

Physical Dimensions

Height700 mm (27.55")
Width700 mm (27.55")
Depth750 mm (29.52")
Weight60 kg (132.0lbs)
 

Product code

  • KVV 987 080 - VHD1.21
 
 
PDF

VHD Subwoofers User Guide

VHD Series Subwoofers User Guide - VHD2.16, VHD2.18J, VHD4.18, VHD1.21, VHD2.21, English

 
 
PDF

VHD1.21 Data Sheet

VHD1.21 Data Sheet

 
 
DWG

VHD1.21 - 3D

- 1:1 scale - clamping points - weight - dwg file

 
 
PDF

VHD1.21 - 2D

VHD1.21 2D Drawings

 
 
SKP

VHD Series Sketchup

VHD Series Sketchup - all boxes and accessories

 
 
DWG

VHD1.21 2D DWG

VHD1.21 2D DWG

 
 
 
 
 

Cable LF100 for bass speaker

Gallery

 
 
 

Product code

KVV 987 123

 

Description

- 4 wire speaker cable - AP4 connectors - 10m (33ft) - for ES Bass Module hook-up

 
 
 

Cable LF15

Gallery

 
 
 

Product code

KVV 987 121

 

Description

- 4 wire speaker cable - AP4 connectors - 1,5m (5ft) - for ES Bass Module daisy-chaining

 
 
 

Cable LF200 for bass speaker

Gallery

 
 
 

Product code

KVV 987 124

 

Description

- 4 wire speaker cable - AP4 connectors - 20m (66ft) - for ES Bass Module hook-up

 
 
 

Cable LF40

Gallery

 
 
 

Product code

KVV 987 122

 

Description

- 4 wire speaker cable - AP4 connectors - 4m (13ft) - for ES Bass Module hook-up

 
 
 

VHD1.21 Cart

Gallery

 
 
 

Product code

KVV 987 109

 

Description

- Front mount aluminium VHD2.21 cart - with hardwood bumpers

 
 
 

VHD1.21 Cover

Gallery

 
 
 

Product code

KVV 987 107

 

Description

- used with cart

 
 
 
 
 
 

VHD-Double C

 

Description

Up to 10000 people Number of bass boxes - depend on music style Right side of stereo double system
 

Products

CountProductType
2VHD2.0MID-HI
4VHD2.16SUB
4VHD1.21SUB
2VHD2000MID-HI AMP
2VHD3200SUB AMP
 

Accessories

CountAccessoryTitle
2Cable MH120Cable MH120
4Cable LF15Cable LF15
2Cable LF40Cable LF40
2Cable LF100Cable LF100 for bass speaker
1VHD2.0 Top arm (pair)VHD2.0 Top arm (pair)
1VHD2.0 Top extension arm (pair)VHD2.0 Top extension arm (pair)
1VHD Bass arm (pair)VHD Bass arm (pair)
1VHD Bass extension arm (pair)VHD Bass extension arm (pair)
1VHD Systems fly barVHD Systems fly bar
 

Images

Front viewWiring
 
 
 

VHD-Single C

 

Description

Up to 5000 people Number of bass boxes - depend on music style Right side of stereo single system
 

Products

CountProductType
1VHD2.0MID-HI
2VHD2.16SUB
2VHD1.21SUB
1VHD2000MID-HI AMP
1VHD3200SUB AMP
 

Accessories

CountAccessoryTitle
1Cable MH60Mid/Hi speaker cable HM60
2Cable LF15Cable LF15
2Cable LF40Cable LF40
 

Images

Front viewWiring
 
 
 

VHD-Single F

 

Description

Up to 5000 people, double bass system Number of bass boxes - depend on music style Right side of stereo single system
 

Products

CountProductType
1VHD2.0MID-HI
4VHD2.16SUB
4VHD1.21SUB
1VHD2000MID-HI AMP
2VHD3200SUB AMP
 

Accessories

CountAccessoryTitle
1Cable MH60Mid/Hi speaker cable HM60
4Cable LF15Cable LF15
4Cable LF40Cable LF40
 

Images

Front viewWiring
 
 
 
 
 
 
Distribution
 

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