Excerpt: The chase for ever smaller subwoofers that produce increasing amounts of bass shows no sign of slowing. Velodyne’s SPL-1000 Ultra could never be described as cheap, but it delivers a mass of bass scarcely creditable from a (sealed) cabinet that is essentially, just a 34cm cube. The sturdy forward-firing 25cm driver helps, of course, as does an internal class D amplifier rated at 1.2kW power output. This Velodyne is a well-specified subwoofer.
Pros: Masses of quality bass from a compact cabinet, well-equipped, fine build and finish