Defender Jose Fonte headed in the opener on the hour mark before Ricky Lambert then added a second just six minutes later.
The Owls had travelled south with the stinging criticism of chairman Milan Mandaric ringing in their ears after he called their league position a ‘frustration and an embarrassment’
His mood is not likely to have improved after this result.
Gary Megson’s side included loanees Rob Jones and Danny Batth who joined the club this week.
Jones moved to Hillsborough from Scunthorpe United, while Batth has joined from Wolverhampton Wanderers.
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