Whether used for multichannel home cinema or pure audio, in the SDS-12 the US subwoofer specialist Sunfire offers a perfectly equipped and deceptively compact solution for the enthusiast on a budget. Sunfire’s combination of a very efficient 300W Class D amplifier, proprietary DSP and both active and passive 300mm drivers is key to achieving such an impressively deep bass from its modest 423x370x394mm (WHD) enclosure. It’s a little sub that’s big on thrills.