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The flagship model in M&K's upgraded X+ Series is the first of its subwoofers to be certified THX Dominus. Steve Withers hires a forklift and checks it out

All speakers operate on the same basic principle of generating sound by physically moving air. The bigger the driver, the more air being shifted and the lower the frequencies. At the end of the day there's no replacement for displacement, so if you want big bass you need a big woofer.

The audiophile brand shoots for the top with its first pair of headphones, and Ed Selley finds out if they can live up to the asking price

The No. 5909s are the first headphones of any description from Mark Levinson, and the company has elected to take the 'go big or go home' approach. Of the wireless models we've looked at recently, they've all resolutely stuck to sub-£500 price points. This pair blasts through that and comes in just shy of a grand – although perhaps that's to be expected from a company that sells stereo power amplifiers with five-figure tickets.

The performance of some high-end speakers from a new US brand makes Mark Craven sit up and listen

With so many speaker brands competing in the home cinema/hi-fi markets, it can sometimes be hard to muster real enthusiasm when another one comes along. Yet Perlisten Audio, a new company from Wisconsin in the US, has arrived with a potent offering that immediately stands out. It helps, of course, that Perlisten debuts with a fully-formed range of models that will suit system builders, including subwoofers and height/surround cabinets.

Home to movies and original series, including HALO and Star Trek: Strange New Worlds, the SVOD platform is available for a £6.99 monthly subscription – but Sky Cinema users get free access