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VHD4.21 Active Passive Bass Module

What is Power without Control. In developing one of the most powerful subwoofer solutions in the world today, our already successful VHD2.21 2x21" subwoofer has evolved to incorporate a revolutionary new Subwoofer Amplifier design, unique to KV2 and featuring  Ultra High Current delivery, Immense Power, Exceptional Control, coupled with a class leading 'Green Efficiency' low consumption power supply. Housing two newly developed large format 21" Woofers the VHD4.21 Active can power an additional Passive VHD4.21 and deliver up to 14,000 Watts of peak power whilst being plugged in to a standard 16A wall socket. The VHD 4.21 is a truly Amazing product and demonstrates the Pinnacle of KV2's Pioneering Subwoofer technologies.

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Applications

The Ultimate seismic Subwoofer to add to any KV2 Audio or third party manufacturers system. 

  • Large scale live music and playback performance
  • Dance Clubs and Nightclubs where Music comes first 
  • Hire and Production
  • Large Concert venues
  • Cinema
  • Fixed installation
  • Easily incorporated into multiple system projects with VHD, SL, ES and ESR 
 

Product code

KVV 987 333 - VHD4.21 ACTIVE 
KVV 987 336 - VHD4.21 PASSIVE

 
 

Features

The VHD4.21 Active Subwoofer Module consists of two purpose designed  'Low Loss-Band Pass' enclosures, one Active and one Passive, with each enclosure containing two specific custom designed large format 21" woofers.

The Low Q design has been applied to attain the optimum Loudspeaker loading, enabling a high sensitivity of 109dB 1w/1m. The design of our unique and innovative new power management system enables the Active Power Amplifier to deliver peak output levels of 14kW, whilst operating at a modest constant consumption of 3.6 kW from a 16A circuit. 

An impressive maximum 320V supplied (limited) peak to peak at 100A from the VHD4.21 Active Module represents a bullet- proof technology that has been fully developed and refined over 12 years of active operation in real life applications, providing maximum control over movement of the large mass of the speaker.

 

Applications

The Ultimate seismic Subwoofer to add to any KV2 Audio or third party manufacturers system. 

  • Large scale live music and playback performance
  • Dance Clubs and Nightclubs where Music comes first 
  • Hire and Production
  • Large Concert venues
  • Cinema
  • Fixed installation
  • Easily incorporated into multiple system projects with VHD, SL, ES and ESR 
 

Product code

KVV 987 333 - VHD4.21 ACTIVE 
KVV 987 336 - VHD4.21 PASSIVE

 
 

System Acoustic Performance

Max SPL Long-term147dB
Max SPL Peak150dB
-3dB Response34Hz - 180Hz
-10dB Response28Hz - 240Hz
Crossover Point70Hz

Low Frequency Section

Acoustic DesignBandpass with low port losses
Woofer Size / Voice Coil Diameter / Design4x 21" / 5.3"
Diaphragm MaterialEpoxy Reinforced Cellulose with Carbon Fiber and Double Surround
Magnet TypeNeodymium Advanced Ventilated

Low Frequency Amplifier Specification

TypeDirect power switching amplifier
Rated Continuous Power3500W
Short Term Power14000W
Distortion<0.05%

Signal Input

Input Sensitivity1.55V RMS
Input Impedance20 kΩ

Power Requirements

Power ConnectorNeutrik PowerCon® 32A
Operating Voltage180V - 260V @ 50Hz | 60Hz
Recommended Amperage16A

Cabinet

Cabinet MaterialBaltic Birch
Handles12
ColorBlack or any RAL

Physical Dimensions

Height700mm (27.56")
Width1080mm (42.52")
Depth1200mm (47.24")
Weight (Active)175kg (386lbs)
Weight (Passive)155kg (342lbs)
 

Product code

KVV 987 333 - VHD4.21 ACTIVE 
KVV 987 336 - VHD4.21 PASSIVE

 
 
PDF

VHD4.21 User Guide

VHD4.21 Active Passive Bass Module - User Guide (EN)

 
 
PDF

VHD Flyware, Suspension & Rigging User Guide

FB-0003 Fly-bar and additional arms with different VHD systems Supspension & Rigging - English 

 
 
GLL

VHD setup - EASE data

EASE data - .GLL - description

 
 
 
 
 

 

Product code

KVV 987 352

 

Description

Cover for VHD2.21/4.21

 
 
 
 
 

Fabric Cover for VHD4.21 Amplifier

 

Product code

KVV 987 390

 

Description

Transport and Fabric Cover for VHD4.21 Amplifier

 
 
 
 
 
 
 
 

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