Excerpt: Velodyne has been working hard to maximise the competitiveness of its affordable subwoofer range. To that end, the new CHT-Q line-up (available in drive-unit sizes from 20cm up to 38cm) includes digital power amplification, coupled to impressive onboard DSP (digital signal processing). Together with a microphone-based automatic calibration system, this is designed to ensure an optimised sound regardless of your system and your room's acoustic properties.
Pros: Automatic installation, potent sound, value for money
Cons: A little slower than some, but not enough to cause too much heartache