Double 21 "remote inverted ultra low frequency speaker

Vb221 is a high-power long stroke neodymium magnetic dual 21 inch ultra-low frequency speaker, designed for high-end mobile and fixed installation. Using two 21 "neodymium magnetic units, 5" voice coil, large stroke design. The sound pressure level is effectively improved, and the carefully optimized tuning is reduced, and the disturbance noise and friction of the air flow in the pipe are reduced; Small vibration box structure, can work stably in high power state, and play clean, strong ultra-low frequency effect, extend the low frequency limit to 27Hz. There are rubber feet and stackable design on both sides of vb221 box to ensure safe stacking without slipping. There are two parallel Neutrik nl4mp sockets in the back terminal block. Both sides of the speaker are equipped with four mechanical design handles and the front net is designed with two mobile plate fixing buckles. The back plate of the speaker is reserved with four mobile wheel mounting positions, which is very suitable for mobile performance or fixed installation applications.

Product features:

▪ 2 x 21 "subwoofer unit

▪ Put it on the floor

▪ Large port reduces air noise

▪ The input connector adopts the original Swiss Neutrik speakon NL4

▪ PDM series power amplifier is fully matched with Dlx digital audio processor, and FIR filter provides flat phase response

▪ Suitable for fixed installation and mobile performance in large and medium halls and performances

Acoustic characteristics

Type: dual 21 "remote inverted ultra low frequency speaker

Unit composition: LF: 2 × 21″(530mm)/5″(127mm)Voice-coil

Coverage angle (horizontal / vertical): omnidirectional

Frequency response (+ / - 5dB): 27 Hz - 120 Hz

Sensitivity (1m / 1W): 121dB

Output sound pressure level: 141.5db/147.5db peak

Nominal impedance: 4 Ω + 4 Ω

Power: 2 × 2000 W AES / 2 × 8000W PEAK

Product size (HxWxD): 590x1300x730mm (23.22 "x 51.18" x 28.74 ")

Weight: 103kg (227.07lbs)


Connecting plug: 2 x Neutrik ® Nl4mp, optional 2 x Amphenol EP4

Plug interface: lf1:1 +, 1 -; LF2:2+,2-

Cabinet material

Box material: 21mm (0.8 ″) Baltic multi-layer birch plywood

Box spray: Black wear-resistant polyurea spray

Mesh cover material: triangular hexagon hole + special rectangular composite steel mesh with sound permeable AIRNET mesh

Mesh spraying: Double anti-corrosion coating, galvanized zinc and black polyester powder

Install application

Armrest form: four mechanical optimized draw hands on the left and right

Support seat: M20 aluminum alloy support seat

All weather / color version: optional

Optional accessories: floor cart with protective cover, rain cover, rubber foot pad, 4 × 100 mm universal bearing wheel

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