(the clue)

Swedish manufacturer Sjofn was luring visitors into its room with an attractive woman drawing their attention to a poster on the wall outside the door announcing (the clue). Inside the room was a pair of unprepossessing stand-mounted speakers, driven by a Hegel amplifier via Supra cables. The two-way, ported Sjofn speakers ($999/pair) were taking full advantage of their boundary loading to produce a big sound.