The VHD2.15 (4 ohm) double 15” subwoofer is a development of KV2 Audio’s ES2.5 design that has become a standard for compact, high output subwoofer devices. Acoustical design is based on extreme loading of asymmetrical chambers delivering extreme output and control.The cabinet is built to the same robust standards as the VHD4.18 and comes with integrated fly track to secure the units for ground stacking or flying in multiples with the VHD2.0 / VHD1.0 Mid Highs. It also functions as a very effective upper bass cabinet when used alongside the Ultra Low Frequency VHD1.21 subwoofers as part of a five way active system.