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 into 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).
Features
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two purpose-designed 'Low Loss-Band Pass' enclosures, one Active and one Passive,
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each enclosure containing two specific custom-designed large format 21" woofers.
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the Low Q design has been applied to attain the optimum Loudspeaker loading, enabling a high sensitivity of 109dB 1w/1m.
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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
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maximum 320V supplied (limited) peak to peak at 100A from the VHD4.21 Active Module
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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.
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: 4 x 21" / 5.3"
Diaphragm Material: Epoxy Reinforced Cellulose with Carbon Fiber and Double Surround
Magnet Type: Neodymium Advanced Ventilated
Low-Frequency Amplifier Specification
Type: Direct power switching amplifier
Rated Continuous Power: 3500W
Short-Term Power: 14000W
Distortion: <0.05%
Signal Input
Input Sensitivity: 1.55V RMS
Input Impedance: 20 kΩ
Power Requirements
Power Connector: Neutrik PowerCon® 32A
Operating Voltage: 180V - 260V @ 50Hz | 60Hz
Recommended Amperage: 16A
Cabinet
Cabinet Material: Baltic Birch
Handles: 12
Color: Black (wear-resistant polymer coating)
Physical Dimensions
Height: 700mm (27.55")
Width: 1080mm (42.52")
Depth: 1200mm (47.24")
Weight (Active): 175kg (386lbs)
Weight (Passive): 155kg (342lbs)
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