Visonik subwoofers and amps are good as they were the first successful commercial subwoofer in 1978 - the SUBI. SUB 8.2, 10.2, and 12.2 are all equipped with Visonik power move technology, which means 75% more energy with no increase in size. It has the best amplifying technology and very few distortions in sound due to first-rate Class AB networks. It synchronizes every rosonance of woofer systems and the amplifier. Numerous options enable an ideal adaptation. They happen to be a good bargain.