At one time, sub woofers that had any pretentions to good performance were big and ugly. Later, as engineers got to grips with designing robust drivers that could withstand high levels of electronic equalisation, they became small and a little less ugly. Yes, there were sub woofers that paid lip service to styling, but generally their performance was compromised. The PV1, although elegant and stylish, owes its curved shape to sound engineering principles, those of a pressure vessel, from which the initials in the name derive. From a simple bubble to a sophisticated deep sea diving bell, a spherical form is the ideal shape to accommodate pressure differences between the inside and outside of the enclosure and there can be considerable pressures generated inside compact sub woofers. The intrinsic strength of the form enables a relatively thin wall construction to the aluminium enclosure, maximising the internal volume.

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