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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 VHD4.21 is a truly Amazing product and demonstrates the Pinnacle of KV2's Pioneering Subwoofer technologies. There is also a flyable version available - VHD4.21R Active Passive Bass Module (KVV 987 480 / KVV 987 481) with additional fixings and requirements for the VHD4.21 Flybar (KVV 987 398).

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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

KVV 987 480 - VHD4.21R ACTIVE
KVV 987 481 - VHD4.21R PASSIVE

Features

two purpose designed 'Low Loss-Band Pass' enclosures, one Active and one Passive,
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.
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
maximum 320V supplied (limited) peak to peak at 100A from the VHD4.21 Active Module
a flyable version available - VHD4.21R Active Passive Bass Module (KVV 987 480 / KVV 987 481)

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

KVV 987 480 - VHD4.21R ACTIVE
KVV 987 481 - VHD4.21R PASSIVE

System Acoustic Performance

Max SPL Long-term	147dB
Max SPL Peak	150dB
-3dB Response	34Hz - 180Hz
-10dB Response	28Hz - 240Hz
Crossover Point	60Hz to 120Hz

Low Frequency Section

Acoustic Design	Bandpass with low port losses
Woofer Size / Voice Coil Diameter / Design	4x 21" / 5.3"
Diaphragm Material	Epoxy Reinforced Cellulose with Carbon Fiber and Double Surround
Magnet Type	Neodymium Advanced Ventilated