« Good Sub but requires a powerful amplifier »

I have been using this since march 2012. This is a big heavy sub which requires and equally big heavy amplifier to drive it - a mistake I made due to budget limitations. The sub itself is very well built and will happily be driven hard all night. Sound quality wise, its pretty good - my system is low passed filtered to below 90Hz so the sub just looks after the sub and infra bass.

Would I buy it again? Definately. I would eventually like to have 4