(...) 'Novation's Bass Station filter was designed by Chris Huggett of Wasp and Oscar fame. Here, it's known as 'Classic', a state-variable creation switchable between 12dB and 24dB slopes. Fresh for the BS2, a further switch offers low-, band- and high-pass modes, greatly extending the filter's usefulness. In all modes, you're quickly aware of the edgy but sparkly maximum resonance, and also that it takes just a smidgen of overdrive to squash any fear of lack of balls. Winding the overdrive higher turns the Classic filter into a pleasantly mashed-up monster. It follows that varying combinations of cutoff frequency, resonance and overdrive yield everything from humongous bass to sound effects and shrieks that will vibrate your granny's teeth out, assuming you're heartless enough to expose her to them. Warm, fluffy and Moogy it isn't.
If this were the full story of the filter I'd be content, but it isn't. There's a second filter on board; a diode ladder design called Acid. This 24dB fat boy operates in low-pass mode only and is noticeably darker than the Classic. Its resonance is wetter and smoother, too. I became an instant convert. As both filters react very differently to high levels of overdrive and resonance, you occasionally get the not-unpleasant feeling that two synths are occupying the same space' (...)
(Paul Nagle - Sound On Sound / September 2013).
https://www.soundonsound.com/reviews/novation-bass-station-2
