A 15in sub in a 439mm cube - Monitor Audio's Anthra W15

Monitor Audio has three new premium subwoofers in the Anthra range and Home Cinema Choice went straight for the flagship 15in model, the W15. The detail that made me look twice wasn't sonic. It arrived in one of the smallest boxes the reviewer had seen for a 15in sub, with a courier visibly suffering under it, and the cabinet turns out to be a perfect cube measuring 439mm per side.

That's the interesting part. The trend of the last few years has been that a big driver gets a big box, and manufacturers stopped apologising for subs the size of a bedside table. Getting a 15 into a cube that small means either a very shallow-mount driver, a lot of internal bracing eating usable volume, or DSP doing work the cabinet isn't doing. All three have a cost somewhere: group delay, port behaviour under load, or an amp running harder than it would like to.

No amp power, no frequency response and no price in what I've seen, so I'm not going to guess where it sits against a PB-2000 Pro or against its own smaller Anthra siblings. What I'd want to know from anyone who has actually installed one: does a cube that dense behave in a corner? Small-footprint subs get bought precisely because they fit where a tall rectangular one can't, and that spot is usually the worst place in the room acoustically. Buying compact and then paying for it in room gain is a trade people make without realising they made it.
 
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